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+---
+name: flutter-version-bump
+description: >
+  Adopt a new Flutter stable release in this monorepo — diagnose and fix the analyze, format, golden, and barrel
+  failures a new toolchain introduces, then raise the published minimum Flutter/Dart floor to the SDK's
+  "latest stable − 1" policy. Use when CI suddenly goes red after a Flutter release, when
+  `dart analyze --fatal-infos` reports diagnostics that did not exist before, when goldens drift after upgrading,
+  or when asked to "support Flutter X" or "bump the min Flutter version".
+allowed-tools:
+  - Bash
+  - Read
+  - Edit
+  - Write
+  - Grep
+  - Glob
+---
+
+# flutter-version-bump
+
+Two different jobs share the phrase "bump Flutter". Decide which one you are doing **before** touching a file —
+they produce different diffs, different review burdens, and only one of them changes what consumers can resolve.
+
+| Track | Goal | Scope | Consumer impact |
+|---|---|---|---|
+| **A — Compat** (first) | Make CI green on the new stable | Source fixes, lint config, goldens | None |
+| **B — Floor raise** (policy-driven) | Move the minimum to latest − 1 | 6 pubspecs + `melos.yaml` + `legacy_version_analyze.yml` + CHANGELOGs + newly-activated lints | Apps below the floor stop resolving |
+
+A floor raise is **not** a breaking change: no `!` in the commit/PR title, and the CHANGELOG bullet does not go
+under `### 🛑 Breaking / Removals`. Existing code keeps compiling; older SDKs simply stop resolving the new
+version. Do not invent a `!` for it.
+
+**Do Track A first, always.** "CI broke after the new Flutter came out" is Track A, and it must land green before
+Track B starts — otherwise you cannot tell a floor-raise failure from a new-stable failure.
+
+**Then check whether Track B is due.** The SDK's policy is **minimum supported = latest stable − 1**, so a new
+stable makes the floor raise *routine, not exceptional*: when 3.47 shipped, the floor moved 3.38 → **3.44**. Pair
+each Flutter minor with its Dart SDK (3.44 → Dart 3.12, 3.47 → Dart 3.13); `fvm releases` lists both, and the
+authoritative list is
+`https://storage.googleapis.com/flutter_infra_release/releases/releases_macos.json` (`fvm`'s cache goes stale).
+
+Track B belongs in a minor/major release rather than a hotfix, and must be its own commit — its diff has nothing
+to do with the compat fixes.
+
+Only **two** version knobs move on a floor raise here, and they are both the *floor*, never the new stable:
+
+| Knob | Value |
+|---|---|
+| `melos.yaml` `command.bootstrap.environment` | the new floor — source of truth, `melos bs` propagates to every pubspec |
+| `.github/workflows/legacy_version_analyze.yml` `env.flutter_version` | the new floor — this job *is* the floor's regression test |
+
+> The repo has **no `.fvmrc`** — local Flutter selection is not pinned here. Do not create one as a side effect of
+> a version bump; that is its own decision. It does mean nothing forces a developer's local toolchain to be the
+> floor, so newer-than-floor API usage is caught only by `legacy_version_analyze`, which analyzes
+> **`stream_core/lib` only** (see below). Analyse against the floor by hand.
+
+## Why CI breaks the day a Flutter stable ships
+
+`.github/workflows/stream_core_flutter_workflow.yml` installs Flutter with
+
+```yaml
+channel: ${{ env.FLUTTER_CHANNEL }}   # stable — no version pin
+```
+
+so both jobs (`analyze` and `test`) **auto-adopt the new stable within hours of release**.
+`legacy_version_analyze.yml` (the N-1 canary) pins a version and does *not* follow. So the first symptom is always
+"CI went red and nobody changed anything", while a local machine on an older SDK still passes.
+
+`melos run analyze` runs `dart analyze --fatal-infos` (examples excluded). New SDKs ship new diagnostics as
+**infos and warnings**, which `--fatal-infos` turns into hard failures. That is why an SDK bump hurts here more
+than in a typical repo.
+
+### Check the canary first — it usually already told you
+
+`beta_version_analyze.yml` runs the `package_analysis` action against the **beta** channel every Monday and Slacks
+on failure. Beta becomes stable roughly a quarter later, so this workflow reports the next release's analyzer
+failures *months* early. Before investigating anything, read its history:
+
+```bash
+gh run list --workflow=beta_version_analyze.yml --limit 10
+gh run view <id> --log-failed | grep -E "warning -|info -|error"
+```
+
+Two traps when reading it, both because `.github/actions/package_analysis/action.yml` is a **one-package action**:
+
+```bash
+cd packages/stream_core/lib && dart analyze --fatal-warnings . && cd .. && flutter test --exclude-tags golden
+```
+
+- **It only covers `stream_core`.** `stream_core_flutter`, `stream_thumbnail` and the gallery are never analysed
+  by the canary or by `legacy_version_analyze`. A green canary says nothing about the Flutter packages.
+- **It is `--fatal-warnings`, not `--fatal-infos`,** and `lib/` only. New *infos* — the bulk of what a new SDK
+  ships — pass the canary and fail `melos run analyze`.
+
+If the canary has been red and unactioned for weeks, that is the most valuable finding in the exercise — report it
+separately from the code fixes.
+
+## Step 1 — Branch off main
+
+Never branch a toolchain bump off a feature branch. Bootstrap rewrites lockfiles repo-wide.
+
+```bash
+git fetch origin
+git checkout -b chore/flutter-<version> origin/main
+```
+
+## Step 2 — Install the new SDK side by side
+
+Keep the old one. Every claim below is an A/B comparison, and you cannot make one with a single toolchain.
+
+```bash
+fvm install <new>                       # e.g. 3.47.0
+fvm list                                # confirm old + new are both cached
+NEW=~/fvm/versions/<new>
+OLD=~/fvm/versions/<current floor, from melos.yaml>
+```
+
+On a floor raise you want **three**: the old floor, the new floor (must analyse clean — it is what
+`legacy_version_analyze` will run) and the latest stable (what CI's `analyze` job actually resolves to).
+
+## Step 3 — Measure before you fix
+
+The single most important habit: **never attribute a failure to the new SDK without seeing the old SDK pass it.**
+Repos accumulate drift; a feature branch may already be dirty; a local `build/` directory can inject hundreds of
+phantom issues. Run each check under both toolchains and diff.
+
+### Format
+
+CI runs `melos run format:verify` → `dart format --set-exit-if-changed .` from the root, which walks untracked
+trees too. Scope to tracked files so `build/` noise cannot pollute the comparison:
+
+```bash
+git ls-files '*.dart' > /tmp/dartfiles.txt
+for V in $OLD $NEW; do
+  echo "== $V"
+  $V/bin/cache/dart-sdk/bin/dart format --output=none --set-exit-if-changed $(cat /tmp/dartfiles.txt) 2>&1 | tail -3
+done
+```
+
+The root `analysis_options.yaml` sets `page_width: 120` and `trailing_commas: preserve`; `dart format` reads it
+from the file nearest the target, so always format from the repo root, never from inside a package with its own
+options file.
+
+Interpretation:
+
+- **Both 0 changed** → the formatter did not change. Do not touch formatting in this PR.
+- **New > 0, old = 0** → `dart_style` changed. Apply it as an **isolated commit** touching nothing else, so the
+  real fixes stay reviewable.
+- **Old > 0, new = 0** → the repo is already formatted for a newer formatter than the floor. Pre-existing drift,
+  harmless. Not yours to fix here — but mention it.
+
+### Analyze
+
+> **Run `melos bootstrap` first, and re-run it after every pubspec edit.** `dart analyze` reads the *language
+> version* from `.dart_tool/package_config.json`, written by `pub get` — **not** from `pubspec.yaml`. A stale
+> `.dart_tool` reports a confidently clean result that CI will not reproduce, and editing an SDK constraint
+> without re-bootstrapping changes nothing at all. Verify with:
+>
+> ```bash
+> python3 -c "import json;d=json.load(open('packages/stream_core_flutter/.dart_tool/package_config.json'));\
+> print([p.get('languageVersion') for p in d['packages'] if p['name']=='stream_core_flutter'])"
+> ```
+>
+> Despite the root `pubspec.yaml` being named `stream_core_flutter_workspace`, this is **not** a pub workspace —
+> no package declares `resolution: workspace`. Melos bootstraps each package separately, so every package has its
+> own `.dart_tool/package_config.json` and you must check the one you care about.
+
+Mirror `melos run analyze` (`--fatal-infos`, examples excluded) and **filter local build artifacts**, which are
+not in CI and will otherwise bury the real signal:
+
+```bash
+set -o pipefail   # otherwise a matching grep masks an analyzer that crashed
+for V in $OLD $NEW; do
+  echo "##### $V"
+  for p in packages/stream_core packages/stream_core_flutter packages/stream_thumbnail apps/design_system_gallery; do
+    echo "### $p"
+    # `|| true` so a package with no diagnostics is not reported as a failure
+    (cd "$p" && $V/bin/cache/dart-sdk/bin/dart analyze --fatal-infos . 2>&1 \
+      | { grep -E "^\s+(info|warning|error)" | grep -v " build/" || true; })
+  done
+done
+```
+
+Everything present under `$NEW` and absent under `$OLD` is your work list. Everything in both is pre-existing —
+leave it alone and say so.
+
+### Tests and goldens — `GITHUB_ACTIONS=true` is mandatory
+
+`packages/stream_core_flutter/test/flutter_test_config.dart` switches alchemist on **`GITHUB_ACTIONS` only** —
+not the more common `CI`. Setting `CI=true` looks right and silently runs the *platform* variant instead:
+
+```dart
+final isRunningInCi = Platform.environment.containsKey('GITHUB_ACTIONS');
+ciGoldensConfig: CiGoldensConfig(enabled: isRunningInCi),
+platformGoldensConfig: PlatformGoldensConfig(enabled: !isRunningInCi),
+```
+
+**Only `goldens/ci/` is committed** (47 files). A bare `flutter test` on your machine runs the platform variant,
+whose goldens do not exist in the repo, and fails every golden test for reasons that have nothing to do with the
+new SDK. Always:
+
+```bash
+for V in $OLD $NEW; do
+  (cd packages/stream_core_flutter && GITHUB_ACTIONS=true $V/bin/flutter test --reporter=compact > /tmp/t-$(basename $V).log 2>&1)
+done
+# compare the failure sets, not the counts — `\r` matters, the compact reporter uses it
+for V in $OLD $NEW; do
+  tr '\r' '\n' < /tmp/t-$(basename $V).log | grep -E '\[E\]$' | sed 's|.*/test/|test/|' | sort -u \
+    > /tmp/fail-$(basename $V).txt
+done
+comm -13 /tmp/fail-$(basename $OLD).txt /tmp/fail-$(basename $NEW).txt   # caused by the new SDK
+comm -12 /tmp/fail-$(basename $OLD).txt /tmp/fail-$(basename $NEW).txt   # pre-existing, out of scope
+```
+
+Repeat for `packages/stream_core` (pure Dart, no goldens).
+
+Committed goldens are Linux-rendered, so some fail on macOS even on the old SDK. That baseline noise is exactly
+what `comm` separates out. **Only the lines the new SDK adds are yours.**
+
+> **Never run `git checkout -- .` between runs.** Alchemist only writes untracked `failures/*.png` directories,
+> so there is nothing to revert — and a blanket checkout silently destroys the source fixes you just made. Clean
+> up with `git clean -fd -- '*/failures'` instead, and keep `git status --short` in view.
+
+### Barrels
+
+`melos run check:barrels` gates the PR alongside analyze. It is not toolchain-sensitive on its own, but a fix
+that moves or adds a file under `packages/stream_core_flutter/lib/src/` breaks it. Run it in the same breath as
+analyze.
+
+## Step 4 — Fix, by failure class
+
+Work the diff from Step 3. Known classes and this repo's chosen remedy:
+
+### New analyzer diagnostics (the usual bulk)
+
+New SDKs add diagnostics that `--fatal-infos` promotes to failures. Treat each as a real finding first — most of
+them point at a genuine latent bug — and only suppress when the diagnostic is wrong about this code.
+
+| Remedy | When |
+|---|---|
+| Fix the code | Default. The diagnostic is usually right. |
+| `// ignore: <name>` with a one-line reason above it | The diagnostic is correct in general but wrong here, or the fix belongs to an upstream package. Never a bare ignore — see `STYLE_GUIDE.md`. |
+| Flip the rule to `false` in `analysis_options.yaml`, or delete it from `all_lint_rules.yaml` | The lint was **removed or renamed** by the SDK. An unrecognized rule name is itself a warning. |
+
+The lint config here is inverted relative to most repos: `all_lint_rules.yaml` is an **explicit list of every
+rule**, included wholesale, and `analysis_options.yaml` then switches individual rules back to `false` with a
+comment saying why. Two consequences:
+
+- **A new SDK's new rules do not activate on their own.** The list is static, so adopting them means adding the
+  names to `all_lint_rules.yaml` — a code-style decision with its own before/after numbers, and **always its own
+  PR**, never this one.
+- **A removed or renamed rule fires `undefined_lint` in `all_lint_rules.yaml`, not in `analysis_options.yaml`.**
+  Delete it there; if `analysis_options.yaml` also disables it, delete that line too or it becomes the next
+  `undefined_lint`.
+
+To find removed/renamed/deprecated lints mechanically rather than by guessing, analyse the options files
+themselves — `melos run analyze` never does, because both sit at the repo **root**, outside every melos package:
+
+```bash
+for V in $OLD $NEW; do
+  echo "== $V"; $V/bin/cache/dart-sdk/bin/dart analyze --fatal-infos analysis_options.yaml all_lint_rules.yaml
+done
+```
+
+`undefined_lint` means the rule was removed or renamed — a hard failure once the root is analysed.
+`deprecated_lint` means it still parses but is on its way out — cheaper to drop now than to discover as
+`undefined_lint` two releases later. Run it under both toolchains: a `deprecated_lint` that also fires on the old
+SDK is pre-existing debt, not something this release introduced.
+
+### Framework deprecations
+
+New `deprecated_member_use` infos are fatal here. Prefer migrating to the replacement API. If the replacement does
+not exist on the floor in `melos.yaml`, you cannot use it — suppress with a scoped ignore naming the reason, and
+leave the migration for the release that raises the floor.
+
+### New runtime assertions
+
+Flutter adds asserts that only fire in tests, so they surface as widget-test failures, not analyzer output. Read
+the assertion and fix the widget tree; do not silence the test.
+
+### Golden pixel drift
+
+Small diffs (well under 1%) across unrelated widgets mean the engine's rasterisation changed — legitimate, and the
+goldens must be regenerated. Larger diffs confined to one widget family usually mean a real layout change;
+investigate before regenerating. **On a Track B floor raise, goldens should not move at all** — CI still runs the
+latest stable either way. If they do, that is a signal to investigate, not to regenerate.
+
+**Goldens are always regenerated by the CI workflow — never locally. No exceptions.**
+
+`melos run update:goldens` writes the *platform* variant on your machine; the committed `goldens/ci/*.png` are
+Linux-rendered. Regenerating locally therefore produces macOS pixels the repo does not even track. Locally you may
+**compare** (`GITHUB_ACTIONS=true flutter test`) to see which goldens moved — never write them.
+
+`update_goldens.yml` checks out with `secrets.BOT_SSH_PRIVATE_KEY` and commits `**/test/**/goldens/*.png` back to
+whatever branch you dispatch against, so **push the branch first**. It has no inputs — it always regenerates
+everything, on `ubuntu-latest`, with `flutter-version: "3.x"` (the new stable, automatically).
+
+> **Confirm with the user before running this.** It pushes a branch and dispatches a workflow that writes a commit
+> to the remote. It is the one outward-facing action in this skill — never dispatch it unprompted, and expect the
+> branch to stay red on goldens until it has run.
+
+```bash
+git push -u origin chore/flutter-<version>
+gh workflow run update_goldens.yml --ref chore/flutter-<version>
+gh run watch $(gh run list --workflow=update_goldens.yml --limit 1 --json databaseId --jq '.[0].databaseId')
+git pull    # pick up the bot's "chore: Update Goldens" commit
+```
+
+Two consequences to state plainly when you report:
+
+- **The branch is not verifiable-green on macOS.** Even after regeneration, a local `GITHUB_ACTIONS=true` run
+  still shows the pre-existing Linux-vs-macOS baseline diffs from Step 3. Give the reviewer that number so a
+  non-zero local failure count is not read as "the fix did not work".
+- `legacy_version_analyze.yml` never runs golden tests, so regenerating against the new stable cannot break the
+  N-1 canary.
+
+### Files the toolchain rewrites underneath you
+
+`melos bootstrap` and `flutter pub get` both edit tracked files. Anything they rewrite that you do not commit
+fails the **format** job, since `melos run format:verify` runs after bootstrap in CI.
+
+- **`pubspec.lock`** — the workspace has a single root lock. Commit it.
+- **`analyzer.exclude` blocks injected into an app-type `analysis_options.yaml`** — Flutter 3.47's `pub get`
+  writes `build/`, `android/`, `ios/`, … exclusions into packages that have a `flutter:` SDK dep *and* platform
+  directories (here: `apps/design_system_gallery`, `packages/stream_thumbnail/example`). It is tool-authored
+  config, not ours. **Surface it, do not decide it yourself** — and note that `pub get` *merges* its full list
+  into any existing `exclude:`, so a hand-trimmed version is not a stable fixed point.
+- **`test_api: any` / `flutter_test: any` appended to `dev_dependencies`** — melos injects these around bootstrap
+  and normally strips them again. **Never commit them**: `flutter_test` has no pub.dev version, so committing it
+  makes the next `melos bootstrap` fail version solving outright.
+
+There are **no Android/iOS build jobs** in this repo's CI — nothing compiles the gallery or the thumbnail example
+for a device. So Gradle/AGP/Kotlin/Xcode floors never gate a PR here, and a new Flutter's raised build-tool floors
+are invisible until someone builds locally. Say that rather than implying the platform projects are verified.
+
+## Step 5 — Verify like CI does
+
+```bash
+melos bootstrap
+melos run analyze
+melos run check:barrels
+melos run format:verify
+GITHUB_ACTIONS=true melos run test:all
+git status --short          # expect only your intended edits
+git clean -fdn -- '*/failures'   # review, then drop -n to remove alchemist's diff images
+```
+
+Two things will still look wrong locally and are not:
+
+- `melos run analyze` surfaces `build/` noise if you have ever built the gallery. Compare against Step 3's
+  baseline instead of expecting a clean zero.
+- `GITHUB_ACTIONS=true melos run test:all` still fails the pre-existing Linux-vs-macOS goldens. Compare failure
+  **sets**, not counts.
+
+Also re-check the floor, since `legacy_version_analyze.yml` gates the PR — and remember it covers `stream_core`
+only, so extend it by hand to the packages it misses:
+
+```bash
+for p in packages/*/; do (cd "$p/lib" && $FLOOR/bin/cache/dart-sdk/bin/dart analyze --fatal-infos .); done
+```
+
+A fix that relies on syntax newer than the floor passes on `$NEW` and fails that job.
+
+## Step 6 — Track B: raise the floor to latest − 1
+
+Keep this out of the Track A commit — it changes what consumers can resolve and needs to be reviewable on its own.
+
+Version-carrying files, all of which must move together. **Derive the list by grep, do not trust this one** — it
+is accurate as of the 3.44 raise:
+
+```bash
+git ls-files '*pubspec.yaml' | xargs grep -ln 'sdk: \^3\.'
+```
+
+- `melos.yaml` — `command.bootstrap.environment.{sdk,flutter}` (the source of truth; `melos bs` propagates)
+- `pubspec.yaml` (root workspace) — `environment.sdk` only; the root carries no `flutter` constraint
+- `packages/stream_core/pubspec.yaml` — `sdk` only. It is **pure Dart and carries no `flutter` constraint — do
+  not add one.**
+- `packages/stream_core_flutter/pubspec.yaml` — `sdk` + `flutter`
+- `packages/stream_thumbnail/pubspec.yaml` and `packages/stream_thumbnail/example/pubspec.yaml`
+- `apps/design_system_gallery/pubspec.yaml`
+- `.github/workflows/legacy_version_analyze.yml` — `env.flutter_version`. Set it to the **new floor** (never the
+  new stable): this job exists to prove the floor still analyses clean. Note the existing value may be a *patch*
+  of the floor (`3.38.10` for a `>=3.38.1` floor) — pick one convention, say which in the commit message.
+
+Confirm melos actually propagated rather than assuming it:
+
+```bash
+melos bootstrap && git diff --stat -- '*pubspec.yaml'
+```
+
+Melos only rewrites keys that already exist, so a pubspec missing a `flutter:` key stays missing one — which is
+what you want for `stream_core`, and what you must fix by hand anywhere it is wrong.
+
+### The floor raise activates dormant lints — budget for it
+
+This is the step that surprises people. Raising the Dart constraint raises each package's **language version**,
+and lints stay silent while their suggested fix is not yet expressible. Raise the floor and they all fire at once,
+in code nobody touched.
+
+Concretely, the Dart 3.10 → 3.12 raise activated `prefer_initializing_formals` on 24 sites across
+`stream_core`, `stream_core_flutter` and the gallery, because Dart 3.12 legalised `this._privateField` as a named
+parameter. Zero issues before, 24 after — none of it caused by the new *stable*, all of it caused by the *floor*.
+
+So: **`melos bootstrap` and re-analyse immediately after editing the constraints**, before you write the
+CHANGELOG. Then let the tooling do the mechanical work:
+
+```bash
+for p in packages/*/ apps/design_system_gallery; do (cd $p && dart fix --dry-run); done
+# then, per lint, once you have decided the fix is right:
+(cd <pkg> && dart fix --apply --code=prefer_initializing_formals)
+```
+
+Two things to check by hand afterwards — `dart fix` is mechanical, not thoughtful:
+
+- **Doc comments get mangled *and silently deleted*.** It rewrites `[logger]` to `[_logger]` in the doc above the
+  constructor — leaking a private name into public API docs, when callers still pass the *public* name
+  (`logger:`, underscore stripped). It also drops any `///` comment attached to the parameter it rewrites. Review
+  every comment line the refactor touched, in both directions:
+
+  ```bash
+  git diff -- '*.dart' | grep -E "^[-+]\s*(///|//)"
+  ```
+
+  Checking only added lines misses the deletions — that is how a lost doc comment survives review.
+- **Confirm no public parameter was renamed.** For every `this._foo` it introduced, the parameter it replaced must
+  have been named exactly `foo`. A mismatch is a silent breaking change for callers — and in this repo a public
+  widget or theme constructor is API that downstream SDKs (`stream-chat-flutter`, `stream-video-flutter`) depend
+  on.
+
+This repo generates heavily (`json_serializable`, `theme_extensions_builder`). Re-run `melos run generate:all`
+afterwards and confirm the generated call sites are unchanged — the generators read constructor parameters, so a
+renamed parameter would silently change `.g.dart` / `.g.theme.dart`.
+
+**Always `dart format` after build_runner.** Generated files carry a `// dart format width=80` marker and are
+emitted at 80 columns while the repo's `analysis_options.yaml` sets `page_width: 120`, so a regen can dirty
+generated files with pure reflow. Format before concluding codegen "changed" anything. Note the root analyzer
+`exclude` covers `packages/*/lib/**/*.*.dart`, so generated files are not analysed — but they *are* formatted.
+
+Then, per `STYLE_GUIDE.md`, one short bullet under `## Upcoming` in each published package's CHANGELOG:
+
+```md
+- Raised minimum Flutter to `>=X.Y.Z` and Dart SDK to `^A.B.C`.
+```
+
+`stream_core` is Dart-only — its bullet mentions the Dart SDK only. `apps/design_system_gallery` is not published
+and has no CHANGELOG. The style guide's heading list (`### ✨ Features`, `### 🐛 Bug Fixes`,
+`### 🛑 Breaking / Removals`, `### ⚠️ Deprecations`) has no "changed" bucket; a floor raise is **not** breaking, so
+use `### 🔄 Changed` and update `STYLE_GUIDE.md` if you introduce it.
+
+Two CI gates read the CHANGELOG and will bite:
+
+- `semantic_changelog_update` in `pr_title.yml` maps scopes `llc`/`ui`/`thumb` to packages. A `chore(repo):` PR is
+  outside that map, so it is not *required* to touch a changelog — but if you do touch one, `changelog_placement`
+  requires the entries to be under `## Upcoming`, not under an already-published version heading.
+- A package that was just released may have **no `## Upcoming` section at all**. Add one at the top rather than
+  filing the bullet under the released version — that is precisely what `changelog_placement` fails on.
+
+Finish with `melos bootstrap` and commit the resulting root `pubspec.lock`.
+
+## Step 7 — Changelog and PR
+
+Track A changes that are user-visible (a widget swapped, a deprecation migrated) get a CHANGELOG bullet in the
+affected package. Pure CI/tooling/golden churn does not.
+
+PR title follows Conventional Commits with a **required scope** from `llc` / `ui` / `repo` / `thumb`
+(`pr_title.yml` enforces it):
+
+- Track A → `chore(repo): support Flutter <version>`
+- Track B → `chore(repo): bump min Flutter to <version> and Dart SDK to <version>`
+
+## Report back with attribution
+
+When summarising, always separate the three buckets — it is the difference between a reviewable PR and a mystery:
+
+1. **Caused by the new SDK** (present on new, absent on old) — what this PR fixes.
+2. **Pre-existing** (present on both) — explicitly out of scope, named so nobody re-investigates.
+3. **Local-only noise** (`build/` artifacts, platform goldens without `GITHUB_ACTIONS=true`) — never appears in
+   CI, never fix.
+
+Say plainly what you could not verify. Here that is a short list — there are no build jobs — but
+`legacy_version_analyze` covering only `stream_core` means "the canary is green" is a much weaker claim than it
+sounds.
diff --git a/.github/workflows/legacy_version_analyze.yml b/.github/workflows/legacy_version_analyze.yml
index 32374d25..76940ddf 100644
--- a/.github/workflows/legacy_version_analyze.yml
+++ b/.github/workflows/legacy_version_analyze.yml
@@ -3,7 +3,7 @@ name: legacy_version_analyze
 env:
   # Note: The versions below should be manually updated after a new stable
   # version comes out.
-  flutter_version: "3.38.10"
+  flutter_version: "3.44.0"
 
 on:
   push:
diff --git a/STYLE_GUIDE.md b/STYLE_GUIDE.md
index d124e397..99447d92 100644
--- a/STYLE_GUIDE.md
+++ b/STYLE_GUIDE.md
@@ -65,6 +65,9 @@ document; the section link is provided.
 - Single quotes, **relative imports inside `lib/src/`** (`always_use_package_imports`
   is disabled here — a deliberate divergence from Flutter's style, favouring
   refactor-friendly relative paths inside the package).
+- Material and Cupertino come from `package:material_ui/material_ui.dart` and
+  `package:cupertino_ui/cupertino_ui.dart`, never `package:flutter/material.dart` —
+  the two sets of types are unrelated. `migrate_design_widgets` enforces this.
 - Trailing commas preserved, `const` wherever possible, `final` for locals that
   aren't reassigned.
 - Prefer named parameters for booleans (`avoid_positional_boolean_parameters`).
@@ -626,10 +629,18 @@ import '../../theme/components/stream_avatar_theme.dart';
 import '../common/stream_network_image.dart';
 
 // GOOD — package: for external and cross-package imports.
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core/stream_core.dart';
 ```
 
+Flutter split Material and Cupertino out of the framework, so
+`package:flutter/material.dart` and `package:material_ui/material_ui.dart` declare
+*different* `ThemeData`, `ThemeExtension` and widget types that cannot be passed to
+one another. Always import `material_ui`. The `migrate_design_widgets` lint fails the
+build on the old URI; the only exceptions are the prefixed bridges that adapt a value
+for a package which has not migrated yet, each carrying an
+`// ignore: migrate_design_widgets`.
+
 Do not use `package:stream_core_flutter/...` inside `lib/src/` — that path is
 reserved for consumers, and using it internally would round-trip through the public
 barrel (which the `check:barrels` rule also forbids).
@@ -1352,12 +1363,21 @@ sub-headings:
 
 - Fixed a crash when opening the media viewer with an empty attachments list.
 
+### 🔄 Changed
+
+- Raised the minimum Flutter version to `>=3.44.0` and the Dart SDK to `^3.12.0`.
+
 ### 🛑 Breaking / Removals
 
 - Removed `StreamCoreMessageComposer`. Use `StreamMessageComposer` from
   `stream_chat_flutter` instead.
 ```
 
+`### 🔄 Changed` covers what is neither new API nor a fix and does not break
+existing code — a raised minimum Flutter/Dart version, a tightened dependency
+constraint, a changed default. A raised floor is **not** breaking: code keeps
+compiling, older SDKs simply stop resolving the new version.
+
 Prefer **one short bullet** per entry, describing the functional change. Longer
 entries are acceptable for user-visible multi-facet features where the extra
 context matters to someone deciding whether to upgrade — but avoid sub-bullets,
diff --git a/all_lint_rules.yaml b/all_lint_rules.yaml
index 0fb9e4b5..10f194d8 100644
--- a/all_lint_rules.yaml
+++ b/all_lint_rules.yaml
@@ -92,6 +92,7 @@ linter:
     - literal_only_boolean_expressions
     - matching_super_parameters
     - missing_code_block_language_in_doc_comment
+    - migrate_design_widgets
     - missing_whitespace_between_adjacent_strings
     - no_adjacent_strings_in_list
     - no_default_cases
diff --git a/apps/design_system_gallery/AGENTS.md b/apps/design_system_gallery/AGENTS.md
index d36e5a62..4ecae479 100644
--- a/apps/design_system_gallery/AGENTS.md
+++ b/apps/design_system_gallery/AGENTS.md
@@ -222,7 +222,7 @@ When modifying `ThemeConfiguration`, ensure `buildMaterialTheme()` stays updated
 Create a new file in `lib/components/`:
 
 ```dart
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/stream_core_flutter.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/app/gallery_app.dart b/apps/design_system_gallery/lib/app/gallery_app.dart
index 48a5c37a..6a698610 100644
--- a/apps/design_system_gallery/lib/app/gallery_app.dart
+++ b/apps/design_system_gallery/lib/app/gallery_app.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:provider/provider.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
 
@@ -49,6 +49,14 @@ class _StreamDesignSystemGalleryState extends State<StreamDesignSystemGallery> {
             theme: materialTheme,
             darkTheme: materialTheme,
             themeMode: isDark ? .dark : .light,
+            // Maps the theme and localizations into Flutter's Material for the
+            // dependencies still built on it — Widgetbook, DeviceFrame, the
+            // colour picker — which would otherwise resolve stock defaults.
+            //
+            // TODO(material-ui): drop as each dependency migrates.
+            // https://linear.app/stream/issue/flu-698
+            // ignore: deprecated_member_use
+            builder: (context, child) => MaterialUiCompatibilityBridge(child: child!),
             home: GalleryShell(
               showThemePanel: _showThemePanel,
               onToggleThemePanel: () => setState(() => _showThemePanel = !_showThemePanel),
diff --git a/apps/design_system_gallery/lib/app/gallery_shell.dart b/apps/design_system_gallery/lib/app/gallery_shell.dart
index 42ce4758..a1b57381 100644
--- a/apps/design_system_gallery/lib/app/gallery_shell.dart
+++ b/apps/design_system_gallery/lib/app/gallery_shell.dart
@@ -1,7 +1,11 @@
-import 'package:flutter/material.dart';
+// ignore: migrate_design_widgets
+import 'package:flutter/material.dart' as legacy;
+import 'package:material_ui/material_ui.dart';
+import 'package:provider/provider.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 
+import '../config/theme_configuration.dart';
 import '../core/preview_wrapper.dart';
 import '../widgets/theme_studio/theme_customization_panel.dart';
 import '../widgets/toolbar/toolbar.dart';
@@ -30,8 +34,15 @@ class GalleryShell extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final materialTheme = Theme.of(context);
-    final isDark = materialTheme.brightness == .dark;
+    final themeConfig = context.watch<ThemeConfiguration>();
+    // Widgetbook builds its own `MaterialApp.router`, which installs a theme of
+    // its own below the bridge — so the chrome takes the bridged theme by value
+    // rather than by inheritance.
+    //
+    // TODO(material-ui): drop once widgetbook supports material_ui.
+    // https://linear.app/stream/issue/flu-703
+    final widgetbookTheme = legacy.Theme.of(context);
+    final isDark = themeConfig.brightness == .dark;
     final screenWidth = MediaQuery.sizeOf(context).width;
 
     // Use overlay on small screens, side-by-side on large screens
@@ -39,8 +50,8 @@ class GalleryShell extends StatelessWidget {
     final useOverlay = widgetbookWidth < kWidgetbookDesktopBreakpoint;
 
     final widgetbook = Widgetbook.material(
-      lightTheme: materialTheme,
-      darkTheme: materialTheme,
+      lightTheme: widgetbookTheme,
+      darkTheme: widgetbookTheme,
       themeMode: isDark ? .dark : .light,
       directories: _collapseDirectories(directories),
       home: const GalleryHomePage(),
diff --git a/apps/design_system_gallery/lib/app/home.dart b/apps/design_system_gallery/lib/app/home.dart
index d8db90dd..152cf403 100644
--- a/apps/design_system_gallery/lib/app/home.dart
+++ b/apps/design_system_gallery/lib/app/home.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 import '../core/stream_icons.dart';
diff --git a/apps/design_system_gallery/lib/components/accessories/stream_audio_waveform.dart b/apps/design_system_gallery/lib/components/accessories/stream_audio_waveform.dart
index 0d080459..4e82cdef 100644
--- a/apps/design_system_gallery/lib/components/accessories/stream_audio_waveform.dart
+++ b/apps/design_system_gallery/lib/components/accessories/stream_audio_waveform.dart
@@ -1,6 +1,6 @@
 import 'dart:math' as math;
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/accessories/stream_emoji.dart b/apps/design_system_gallery/lib/components/accessories/stream_emoji.dart
index 77c23a27..2e65775d 100644
--- a/apps/design_system_gallery/lib/components/accessories/stream_emoji.dart
+++ b/apps/design_system_gallery/lib/components/accessories/stream_emoji.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:unicode_emojis/unicode_emojis.dart';
 import 'package:widgetbook/widgetbook.dart';
diff --git a/apps/design_system_gallery/lib/components/accessories/stream_file_type_icons.dart b/apps/design_system_gallery/lib/components/accessories/stream_file_type_icons.dart
index b1cc50a2..0f6101e9 100644
--- a/apps/design_system_gallery/lib/components/accessories/stream_file_type_icons.dart
+++ b/apps/design_system_gallery/lib/components/accessories/stream_file_type_icons.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/avatar/stream_avatar.dart b/apps/design_system_gallery/lib/components/avatar/stream_avatar.dart
index 520081ac..718b58a3 100644
--- a/apps/design_system_gallery/lib/components/avatar/stream_avatar.dart
+++ b/apps/design_system_gallery/lib/components/avatar/stream_avatar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/avatar/stream_avatar_group.dart b/apps/design_system_gallery/lib/components/avatar/stream_avatar_group.dart
index de58637f..49bb37a3 100644
--- a/apps/design_system_gallery/lib/components/avatar/stream_avatar_group.dart
+++ b/apps/design_system_gallery/lib/components/avatar/stream_avatar_group.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/avatar/stream_avatar_stack.dart b/apps/design_system_gallery/lib/components/avatar/stream_avatar_stack.dart
index ad07bc3f..10d2ffd8 100644
--- a/apps/design_system_gallery/lib/components/avatar/stream_avatar_stack.dart
+++ b/apps/design_system_gallery/lib/components/avatar/stream_avatar_stack.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/badge/stream_badge_count.dart b/apps/design_system_gallery/lib/components/badge/stream_badge_count.dart
index 6260dadc..0210a87e 100644
--- a/apps/design_system_gallery/lib/components/badge/stream_badge_count.dart
+++ b/apps/design_system_gallery/lib/components/badge/stream_badge_count.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/badge/stream_badge_notification.dart b/apps/design_system_gallery/lib/components/badge/stream_badge_notification.dart
index 6eb2494d..cd96e399 100644
--- a/apps/design_system_gallery/lib/components/badge/stream_badge_notification.dart
+++ b/apps/design_system_gallery/lib/components/badge/stream_badge_notification.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/badge/stream_error_badge.dart b/apps/design_system_gallery/lib/components/badge/stream_error_badge.dart
index e4ea39fa..37618a01 100644
--- a/apps/design_system_gallery/lib/components/badge/stream_error_badge.dart
+++ b/apps/design_system_gallery/lib/components/badge/stream_error_badge.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/badge/stream_image_source_badge.dart b/apps/design_system_gallery/lib/components/badge/stream_image_source_badge.dart
index 5bab5584..058ed8ab 100644
--- a/apps/design_system_gallery/lib/components/badge/stream_image_source_badge.dart
+++ b/apps/design_system_gallery/lib/components/badge/stream_image_source_badge.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/badge/stream_online_indicator.dart b/apps/design_system_gallery/lib/components/badge/stream_online_indicator.dart
index 95d16094..e038d4b0 100644
--- a/apps/design_system_gallery/lib/components/badge/stream_online_indicator.dart
+++ b/apps/design_system_gallery/lib/components/badge/stream_online_indicator.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/badge/stream_retry_badge.dart b/apps/design_system_gallery/lib/components/badge/stream_retry_badge.dart
index b34e1f22..faa473ca 100644
--- a/apps/design_system_gallery/lib/components/badge/stream_retry_badge.dart
+++ b/apps/design_system_gallery/lib/components/badge/stream_retry_badge.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/buttons/button.dart b/apps/design_system_gallery/lib/components/buttons/button.dart
index 37d5cc39..e23bf75a 100644
--- a/apps/design_system_gallery/lib/components/buttons/button.dart
+++ b/apps/design_system_gallery/lib/components/buttons/button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/buttons/stream_emoji_button.dart b/apps/design_system_gallery/lib/components/buttons/stream_emoji_button.dart
index 3a8adf48..ac766452 100644
--- a/apps/design_system_gallery/lib/components/buttons/stream_emoji_button.dart
+++ b/apps/design_system_gallery/lib/components/buttons/stream_emoji_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:unicode_emojis/unicode_emojis.dart';
 import 'package:widgetbook/widgetbook.dart';
diff --git a/apps/design_system_gallery/lib/components/buttons/stream_jump_to_unread_button.dart b/apps/design_system_gallery/lib/components/buttons/stream_jump_to_unread_button.dart
index 20db0907..07ff7c81 100644
--- a/apps/design_system_gallery/lib/components/buttons/stream_jump_to_unread_button.dart
+++ b/apps/design_system_gallery/lib/components/buttons/stream_jump_to_unread_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_checkbox.dart b/apps/design_system_gallery/lib/components/common/stream_checkbox.dart
index f4d8f669..1586dbee 100644
--- a/apps/design_system_gallery/lib/components/common/stream_checkbox.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_checkbox.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_flex.dart b/apps/design_system_gallery/lib/components/common/stream_flex.dart
index e2ff9add..4c3c5f02 100644
--- a/apps/design_system_gallery/lib/components/common/stream_flex.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_flex.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_intrinsic_flex.dart b/apps/design_system_gallery/lib/components/common/stream_intrinsic_flex.dart
index 08f65bf3..b3b019e9 100644
--- a/apps/design_system_gallery/lib/components/common/stream_intrinsic_flex.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_intrinsic_flex.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_loading_spinner.dart b/apps/design_system_gallery/lib/components/common/stream_loading_spinner.dart
index f9574997..9a70692f 100644
--- a/apps/design_system_gallery/lib/components/common/stream_loading_spinner.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_loading_spinner.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_network_image.dart b/apps/design_system_gallery/lib/components/common/stream_network_image.dart
index 837bb511..699aee7d 100644
--- a/apps/design_system_gallery/lib/components/common/stream_network_image.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_network_image.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_progress_bar.dart b/apps/design_system_gallery/lib/components/common/stream_progress_bar.dart
index 55c16dec..341bab7a 100644
--- a/apps/design_system_gallery/lib/components/common/stream_progress_bar.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_progress_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_skeleton_loading.dart b/apps/design_system_gallery/lib/components/common/stream_skeleton_loading.dart
index 0cdc647a..f54090ac 100644
--- a/apps/design_system_gallery/lib/components/common/stream_skeleton_loading.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_skeleton_loading.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_tap_target_padding.dart b/apps/design_system_gallery/lib/components/common/stream_tap_target_padding.dart
index 8b7b4819..2b12b095 100644
--- a/apps/design_system_gallery/lib/components/common/stream_tap_target_padding.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_tap_target_padding.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/common/stream_text_input.dart b/apps/design_system_gallery/lib/components/common/stream_text_input.dart
index e6ec4e8b..8acbee8f 100644
--- a/apps/design_system_gallery/lib/components/common/stream_text_input.dart
+++ b/apps/design_system_gallery/lib/components/common/stream_text_input.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/context_menu/stream_context_menu.dart b/apps/design_system_gallery/lib/components/context_menu/stream_context_menu.dart
index b1cdc0e2..13c2e0f9 100644
--- a/apps/design_system_gallery/lib/components/context_menu/stream_context_menu.dart
+++ b/apps/design_system_gallery/lib/components/context_menu/stream_context_menu.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/playback_speed_toggle.dart b/apps/design_system_gallery/lib/components/controls/playback_speed_toggle.dart
index 72639619..1ebf6c0a 100644
--- a/apps/design_system_gallery/lib/components/controls/playback_speed_toggle.dart
+++ b/apps/design_system_gallery/lib/components/controls/playback_speed_toggle.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/stream_command_chip.dart b/apps/design_system_gallery/lib/components/controls/stream_command_chip.dart
index b90a53d1..1bf7b4b2 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_command_chip.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_command_chip.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/stream_emoji_chip.dart b/apps/design_system_gallery/lib/components/controls/stream_emoji_chip.dart
index 2c4d1c58..d6088053 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_emoji_chip.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_emoji_chip.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:unicode_emojis/unicode_emojis.dart';
 import 'package:widgetbook/widgetbook.dart';
diff --git a/apps/design_system_gallery/lib/components/controls/stream_emoji_chip_bar.dart b/apps/design_system_gallery/lib/components/controls/stream_emoji_chip_bar.dart
index a8a217d2..a6fab3d4 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_emoji_chip_bar.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_emoji_chip_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/stream_remove_control.dart b/apps/design_system_gallery/lib/components/controls/stream_remove_control.dart
index b22fd288..338d5a6d 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_remove_control.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_remove_control.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/stream_stepper.dart b/apps/design_system_gallery/lib/components/controls/stream_stepper.dart
index 4c970402..a5bde621 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_stepper.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_stepper.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/stream_switch.dart b/apps/design_system_gallery/lib/components/controls/stream_switch.dart
index 72d81b3b..6fe92ea3 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_switch.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_switch.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/controls/stream_video_play_indicator.dart b/apps/design_system_gallery/lib/components/controls/stream_video_play_indicator.dart
index 3544cb92..9e86ff07 100644
--- a/apps/design_system_gallery/lib/components/controls/stream_video_play_indicator.dart
+++ b/apps/design_system_gallery/lib/components/controls/stream_video_play_indicator.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/emoji/stream_emoji_picker_sheet.dart b/apps/design_system_gallery/lib/components/emoji/stream_emoji_picker_sheet.dart
index 259c74b0..c4b05b7b 100644
--- a/apps/design_system_gallery/lib/components/emoji/stream_emoji_picker_sheet.dart
+++ b/apps/design_system_gallery/lib/components/emoji/stream_emoji_picker_sheet.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/media_viewer/stream_media_viewer.dart b/apps/design_system_gallery/lib/components/media_viewer/stream_media_viewer.dart
index 4ffa06c6..4ad116f1 100644
--- a/apps/design_system_gallery/lib/components/media_viewer/stream_media_viewer.dart
+++ b/apps/design_system_gallery/lib/components/media_viewer/stream_media_viewer.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_annotation.dart b/apps/design_system_gallery/lib/components/message/stream_message_annotation.dart
index ba1497cb..74c2fc20 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_annotation.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_annotation.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_attachment.dart b/apps/design_system_gallery/lib/components/message/stream_message_attachment.dart
index 6ae51182..ad75ba28 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_attachment.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_bubble.dart b/apps/design_system_gallery/lib/components/message/stream_message_bubble.dart
index 4075840d..4167ef6b 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_bubble.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_bubble.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_content.dart b/apps/design_system_gallery/lib/components/message/stream_message_content.dart
index a1822704..9a73a608 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_content.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_content.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_metadata.dart b/apps/design_system_gallery/lib/components/message/stream_message_metadata.dart
index 34c543a2..d00e31c4 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_metadata.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_metadata.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_replies.dart b/apps/design_system_gallery/lib/components/message/stream_message_replies.dart
index b424cb57..6ebe030c 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_replies.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_replies.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message/stream_message_text.dart b/apps/design_system_gallery/lib/components/message/stream_message_text.dart
index 353cde59..18a5e9ab 100644
--- a/apps/design_system_gallery/lib/components/message/stream_message_text.dart
+++ b/apps/design_system_gallery/lib/components/message/stream_message_text.dart
@@ -1,7 +1,7 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
 import 'package:markdown/markdown.dart' as md;
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_edit_message.dart b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_edit_message.dart
index 8aa84833..134b1d53 100644
--- a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_edit_message.dart
+++ b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_edit_message.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_link_preview.dart b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_link_preview.dart
index c6e46456..a3d786b0 100644
--- a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_link_preview.dart
+++ b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_link_preview.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_media.dart b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_media.dart
index 7538a8c5..e8d3999a 100644
--- a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_media.dart
+++ b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_media.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_reply.dart b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_reply.dart
index b155dc17..06474d6e 100644
--- a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_reply.dart
+++ b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_reply.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_unsupported.dart b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_unsupported.dart
index c1f1536d..13727ddb 100644
--- a/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_unsupported.dart
+++ b/apps/design_system_gallery/lib/components/message_composer/message_composer_attachment_unsupported.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/message_composer/message_composer_file_attachment.dart b/apps/design_system_gallery/lib/components/message_composer/message_composer_file_attachment.dart
index bae2b600..24954b3f 100644
--- a/apps/design_system_gallery/lib/components/message_composer/message_composer_file_attachment.dart
+++ b/apps/design_system_gallery/lib/components/message_composer/message_composer_file_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/reaction/stream_reaction_picker.dart b/apps/design_system_gallery/lib/components/reaction/stream_reaction_picker.dart
index 8f4cb9a2..8e01fd48 100644
--- a/apps/design_system_gallery/lib/components/reaction/stream_reaction_picker.dart
+++ b/apps/design_system_gallery/lib/components/reaction/stream_reaction_picker.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/reaction/stream_reactions.dart b/apps/design_system_gallery/lib/components/reaction/stream_reactions.dart
index aba7a514..e2c2bfe2 100644
--- a/apps/design_system_gallery/lib/components/reaction/stream_reactions.dart
+++ b/apps/design_system_gallery/lib/components/reaction/stream_reactions.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/scaffold/stream_scaffold.dart b/apps/design_system_gallery/lib/components/scaffold/stream_scaffold.dart
index 41baf704..0919d320 100644
--- a/apps/design_system_gallery/lib/components/scaffold/stream_scaffold.dart
+++ b/apps/design_system_gallery/lib/components/scaffold/stream_scaffold.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/gestures.dart' show DragStartBehavior;
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/sheet/stream_sheet.dart b/apps/design_system_gallery/lib/components/sheet/stream_sheet.dart
index ff8bb519..37e0c0e9 100644
--- a/apps/design_system_gallery/lib/components/sheet/stream_sheet.dart
+++ b/apps/design_system_gallery/lib/components/sheet/stream_sheet.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/snackbar/stream_snackbar.dart b/apps/design_system_gallery/lib/components/snackbar/stream_snackbar.dart
index c806bb83..750ad827 100644
--- a/apps/design_system_gallery/lib/components/snackbar/stream_snackbar.dart
+++ b/apps/design_system_gallery/lib/components/snackbar/stream_snackbar.dart
@@ -1,6 +1,6 @@
 import 'dart:async';
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/tiles/stream_list_tile.dart b/apps/design_system_gallery/lib/components/tiles/stream_list_tile.dart
index 1455f7c0..e4d6ad97 100644
--- a/apps/design_system_gallery/lib/components/tiles/stream_list_tile.dart
+++ b/apps/design_system_gallery/lib/components/tiles/stream_list_tile.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/toolbar/stream_app_bar.dart b/apps/design_system_gallery/lib/components/toolbar/stream_app_bar.dart
index 19fc8092..5b8ce8a7 100644
--- a/apps/design_system_gallery/lib/components/toolbar/stream_app_bar.dart
+++ b/apps/design_system_gallery/lib/components/toolbar/stream_app_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/toolbar/stream_bottom_app_bar.dart b/apps/design_system_gallery/lib/components/toolbar/stream_bottom_app_bar.dart
index 4e6aa92a..09cfad94 100644
--- a/apps/design_system_gallery/lib/components/toolbar/stream_bottom_app_bar.dart
+++ b/apps/design_system_gallery/lib/components/toolbar/stream_bottom_app_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/toolbar/stream_bottom_nav_bar.dart b/apps/design_system_gallery/lib/components/toolbar/stream_bottom_nav_bar.dart
index d8bea558..56d74b2d 100644
--- a/apps/design_system_gallery/lib/components/toolbar/stream_bottom_nav_bar.dart
+++ b/apps/design_system_gallery/lib/components/toolbar/stream_bottom_nav_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/toolbar/stream_sheet_header.dart b/apps/design_system_gallery/lib/components/toolbar/stream_sheet_header.dart
index 6ef0eaf7..5ee9676a 100644
--- a/apps/design_system_gallery/lib/components/toolbar/stream_sheet_header.dart
+++ b/apps/design_system_gallery/lib/components/toolbar/stream_sheet_header.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/components/toolbar/stream_toolbar_button.dart b/apps/design_system_gallery/lib/components/toolbar/stream_toolbar_button.dart
index d815ddf1..86f0e679 100644
--- a/apps/design_system_gallery/lib/components/toolbar/stream_toolbar_button.dart
+++ b/apps/design_system_gallery/lib/components/toolbar/stream_toolbar_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook/widgetbook.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart' as widgetbook;
diff --git a/apps/design_system_gallery/lib/config/theme_configuration.dart b/apps/design_system_gallery/lib/config/theme_configuration.dart
index 733359e7..972673a2 100644
--- a/apps/design_system_gallery/lib/config/theme_configuration.dart
+++ b/apps/design_system_gallery/lib/config/theme_configuration.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A notifier that manages the theme configuration for the design system gallery.
@@ -7,8 +7,8 @@ import 'package:stream_core_flutter/core.dart';
 /// exact naming conventions from [StreamColorScheme].
 class ThemeConfiguration extends ChangeNotifier {
   ThemeConfiguration({
-    Brightness brightness = Brightness.light,
-  }) : _brightness = brightness {
+    this._brightness = Brightness.light,
+  }) {
     _rebuildTheme();
   }
 
diff --git a/apps/design_system_gallery/lib/core/preview_wrapper.dart b/apps/design_system_gallery/lib/core/preview_wrapper.dart
index fc185736..2a56e508 100644
--- a/apps/design_system_gallery/lib/core/preview_wrapper.dart
+++ b/apps/design_system_gallery/lib/core/preview_wrapper.dart
@@ -1,5 +1,5 @@
 import 'package:device_frame_plus/device_frame_plus.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:provider/provider.dart';
 import 'package:stream_core_flutter/core.dart';
 
diff --git a/apps/design_system_gallery/lib/main.dart b/apps/design_system_gallery/lib/main.dart
index 72a4e899..6307e341 100644
--- a/apps/design_system_gallery/lib/main.dart
+++ b/apps/design_system_gallery/lib/main.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:marionette_flutter/marionette_flutter.dart';
+import 'package:material_ui/material_ui.dart';
 
 import 'app/gallery_app.dart';
 
diff --git a/apps/design_system_gallery/lib/primitives/colors.dart b/apps/design_system_gallery/lib/primitives/colors.dart
index f2796fee..53cec9ca 100644
--- a/apps/design_system_gallery/lib/primitives/colors.dart
+++ b/apps/design_system_gallery/lib/primitives/colors.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart';
 
diff --git a/apps/design_system_gallery/lib/primitives/icons.dart b/apps/design_system_gallery/lib/primitives/icons.dart
index 825abcd3..4635b57a 100644
--- a/apps/design_system_gallery/lib/primitives/icons.dart
+++ b/apps/design_system_gallery/lib/primitives/icons.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart';
 
diff --git a/apps/design_system_gallery/lib/primitives/radius.dart b/apps/design_system_gallery/lib/primitives/radius.dart
index d564dd63..eb9c30ab 100644
--- a/apps/design_system_gallery/lib/primitives/radius.dart
+++ b/apps/design_system_gallery/lib/primitives/radius.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart';
 
diff --git a/apps/design_system_gallery/lib/primitives/spacing.dart b/apps/design_system_gallery/lib/primitives/spacing.dart
index 2ec089de..83750cb1 100644
--- a/apps/design_system_gallery/lib/primitives/spacing.dart
+++ b/apps/design_system_gallery/lib/primitives/spacing.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart';
 
diff --git a/apps/design_system_gallery/lib/semantics/elevations.dart b/apps/design_system_gallery/lib/semantics/elevations.dart
index 5b1a7b61..fe79ca0b 100644
--- a/apps/design_system_gallery/lib/semantics/elevations.dart
+++ b/apps/design_system_gallery/lib/semantics/elevations.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart';
 
diff --git a/apps/design_system_gallery/lib/semantics/typography.dart b/apps/design_system_gallery/lib/semantics/typography.dart
index 9cd039f8..17763eb1 100644
--- a/apps/design_system_gallery/lib/semantics/typography.dart
+++ b/apps/design_system_gallery/lib/semantics/typography.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 import 'package:widgetbook_annotation/widgetbook_annotation.dart';
 
diff --git a/apps/design_system_gallery/lib/widgets/theme_studio/avatar_palette_section.dart b/apps/design_system_gallery/lib/widgets/theme_studio/avatar_palette_section.dart
index e887b64b..ad1a44a8 100644
--- a/apps/design_system_gallery/lib/widgets/theme_studio/avatar_palette_section.dart
+++ b/apps/design_system_gallery/lib/widgets/theme_studio/avatar_palette_section.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_colorpicker/flutter_colorpicker.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A tile for editing a single avatar color pair (background and foreground).
diff --git a/apps/design_system_gallery/lib/widgets/theme_studio/color_picker_tile.dart b/apps/design_system_gallery/lib/widgets/theme_studio/color_picker_tile.dart
index 711952be..ec3ad135 100644
--- a/apps/design_system_gallery/lib/widgets/theme_studio/color_picker_tile.dart
+++ b/apps/design_system_gallery/lib/widgets/theme_studio/color_picker_tile.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_colorpicker/flutter_colorpicker.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A tile that displays a color and opens a color picker when tapped.
diff --git a/apps/design_system_gallery/lib/widgets/theme_studio/mode_button.dart b/apps/design_system_gallery/lib/widgets/theme_studio/mode_button.dart
index a8418cc6..c969d41a 100644
--- a/apps/design_system_gallery/lib/widgets/theme_studio/mode_button.dart
+++ b/apps/design_system_gallery/lib/widgets/theme_studio/mode_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A button for selecting light or dark mode in the theme studio.
diff --git a/apps/design_system_gallery/lib/widgets/theme_studio/section_card.dart b/apps/design_system_gallery/lib/widgets/theme_studio/section_card.dart
index a2c86d57..16792811 100644
--- a/apps/design_system_gallery/lib/widgets/theme_studio/section_card.dart
+++ b/apps/design_system_gallery/lib/widgets/theme_studio/section_card.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A card container for theme customization sections.
diff --git a/apps/design_system_gallery/lib/widgets/theme_studio/theme_customization_panel.dart b/apps/design_system_gallery/lib/widgets/theme_studio/theme_customization_panel.dart
index 3ce90aa8..83a1262a 100644
--- a/apps/design_system_gallery/lib/widgets/theme_studio/theme_customization_panel.dart
+++ b/apps/design_system_gallery/lib/widgets/theme_studio/theme_customization_panel.dart
@@ -1,6 +1,6 @@
 import 'dart:math' show Random;
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:provider/provider.dart';
 import 'package:stream_core_flutter/core.dart';
 
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/baselines_toggle.dart b/apps/design_system_gallery/lib/widgets/toolbar/baselines_toggle.dart
index d544abcc..5511659d 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/baselines_toggle.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/baselines_toggle.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
+import 'package:material_ui/material_ui.dart';
 
 import 'toolbar_button.dart';
 
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/debug_paint_toggle.dart b/apps/design_system_gallery/lib/widgets/toolbar/debug_paint_toggle.dart
index e9157772..16fa4a74 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/debug_paint_toggle.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/debug_paint_toggle.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
+import 'package:material_ui/material_ui.dart';
 
 import 'toolbar_button.dart';
 
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/device_selector.dart b/apps/design_system_gallery/lib/widgets/toolbar/device_selector.dart
index 626816bb..f246da57 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/device_selector.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/device_selector.dart
@@ -1,5 +1,5 @@
 import 'package:device_frame_plus/device_frame_plus.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A dropdown selector for choosing the preview device.
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/platform_selector.dart b/apps/design_system_gallery/lib/widgets/toolbar/platform_selector.dart
index e76e21d9..b7ee8684 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/platform_selector.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/platform_selector.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A dropdown selector for choosing the target platform override.
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/semantics_debugger_toggle.dart b/apps/design_system_gallery/lib/widgets/toolbar/semantics_debugger_toggle.dart
index 99a7fb53..cd2bc45a 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/semantics_debugger_toggle.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/semantics_debugger_toggle.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:provider/provider.dart';
 
 import '../../config/preview_configuration.dart';
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/text_direction_selector.dart b/apps/design_system_gallery/lib/widgets/toolbar/text_direction_selector.dart
index a3e0627b..522b6074 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/text_direction_selector.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/text_direction_selector.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A dropdown selector for choosing the text direction (LTR/RTL).
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/text_scale_selector.dart b/apps/design_system_gallery/lib/widgets/toolbar/text_scale_selector.dart
index b0bb6a06..031ad808 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/text_scale_selector.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/text_scale_selector.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A dropdown selector for choosing the text scale factor.
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/theme_mode_toggle.dart b/apps/design_system_gallery/lib/widgets/toolbar/theme_mode_toggle.dart
index d5b37cc8..dde3753c 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/theme_mode_toggle.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/theme_mode_toggle.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A toggle button for switching between light and dark theme modes.
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/toolbar.dart b/apps/design_system_gallery/lib/widgets/toolbar/toolbar.dart
index 6ecd5d93..369218ae 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/toolbar.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/toolbar.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:provider/provider.dart';
 import 'package:stream_core_flutter/core.dart';
 
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/toolbar_button.dart b/apps/design_system_gallery/lib/widgets/toolbar/toolbar_button.dart
index 59c70f06..03a4ed85 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/toolbar_button.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/toolbar_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// A reusable toolbar button with icon and tooltip.
diff --git a/apps/design_system_gallery/lib/widgets/toolbar/widget_select_toggle.dart b/apps/design_system_gallery/lib/widgets/toolbar/widget_select_toggle.dart
index ffda5b52..89200747 100644
--- a/apps/design_system_gallery/lib/widgets/toolbar/widget_select_toggle.dart
+++ b/apps/design_system_gallery/lib/widgets/toolbar/widget_select_toggle.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import 'toolbar_button.dart';
 
diff --git a/apps/design_system_gallery/pubspec.yaml b/apps/design_system_gallery/pubspec.yaml
index c3fb8d38..77893d83 100644
--- a/apps/design_system_gallery/pubspec.yaml
+++ b/apps/design_system_gallery/pubspec.yaml
@@ -4,8 +4,8 @@ publish_to: 'none'
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.10.0
-  flutter: ">=3.38.1"
+  sdk: ^3.12.0
+  flutter: ">=3.44.0"
 
 dependencies:
   device_frame_plus: ^1.0.0
@@ -15,6 +15,7 @@ dependencies:
   flutter_markdown_plus: ^1.0.7
   marionette_flutter: ^0.3.0
   markdown: ^7.3.0
+  material_ui: ^1.0.0
   provider: ^6.1.5+1
   stream_core_flutter: ^0.5.0
   svg_icon_widget: ^0.0.1+1
diff --git a/melos.yaml b/melos.yaml
index 17b97ecb..7f8565ea 100644
--- a/melos.yaml
+++ b/melos.yaml
@@ -12,9 +12,9 @@ command:
   bootstrap:
     # Dart and Flutter environment used in the project.
     environment:
-      sdk: ^3.10.0
+      sdk: ^3.12.0
       # We are not using carat '^' syntax here because flutter don't follow semantic versioning.
-      flutter: ">=3.38.1"
+      flutter: ">=3.44.0"
 
     # List of all the dependencies used in the project.
     dependencies:
@@ -31,6 +31,7 @@ command:
       json_annotation: ^4.9.0
       markdown: ^7.3.0
       material_color_utilities: '>=0.11.0 <0.14.0'
+      material_ui: ^1.0.0
       meta: ^1.15.0
       mime: ^2.0.0
       path: ^1.9.0
diff --git a/packages/stream_core/CHANGELOG.md b/packages/stream_core/CHANGELOG.md
index 7e039175..3a90f784 100644
--- a/packages/stream_core/CHANGELOG.md
+++ b/packages/stream_core/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 - Added `teams` field to `User` class.
 
+### 🔄 Changed
+
+- Raised the minimum Dart SDK to `^3.12.0`.
+
 ## 0.4.0
 
 ### 💥 BREAKING CHANGES
diff --git a/packages/stream_core/lib/src/api/system_environment_manager.dart b/packages/stream_core/lib/src/api/system_environment_manager.dart
index 086e497c..96986bdc 100644
--- a/packages/stream_core/lib/src/api/system_environment_manager.dart
+++ b/packages/stream_core/lib/src/api/system_environment_manager.dart
@@ -8,8 +8,8 @@ import 'system_environment.dart';
 class SystemEnvironmentManager {
   /// {@macro systemEnvironmentManager}
   SystemEnvironmentManager({
-    required SystemEnvironment environment,
-  }) : _environment = environment;
+    required this._environment,
+  });
 
   /// Returns the Stream client user agent string based on the current
   /// [environment] value.
diff --git a/packages/stream_core/lib/src/attachment/uploader/attachment_uploader.dart b/packages/stream_core/lib/src/attachment/uploader/attachment_uploader.dart
index a6603068..a02b1182 100644
--- a/packages/stream_core/lib/src/attachment/uploader/attachment_uploader.dart
+++ b/packages/stream_core/lib/src/attachment/uploader/attachment_uploader.dart
@@ -53,8 +53,8 @@ class AttachmentUploadException implements Exception {
 class StreamAttachmentUploader {
   /// Creates a [StreamAttachmentUploader] with the specified [cdn] client.
   const StreamAttachmentUploader({
-    required CdnClient cdn,
-  }) : _cdn = cdn;
+    required this._cdn,
+  });
 
   // The CDN client used for upload operations.
   final CdnClient _cdn;
diff --git a/packages/stream_core/lib/src/user/token_manager.dart b/packages/stream_core/lib/src/user/token_manager.dart
index 288f0d4f..aa25ac07 100644
--- a/packages/stream_core/lib/src/user/token_manager.dart
+++ b/packages/stream_core/lib/src/user/token_manager.dart
@@ -32,8 +32,8 @@ class TokenManager {
   /// The [tokenProvider] is used to load tokens when needed.
   TokenManager({
     required this.userId,
-    required TokenProvider tokenProvider,
-  }) : _tokenProvider = tokenProvider;
+    required this._tokenProvider,
+  });
 
   /// The unique identifier of the user whose tokens are managed.
   final String userId;
diff --git a/packages/stream_core/lib/src/ws/client/engine/stream_web_socket_engine.dart b/packages/stream_core/lib/src/ws/client/engine/stream_web_socket_engine.dart
index 7a705969..f702ff6f 100644
--- a/packages/stream_core/lib/src/ws/client/engine/stream_web_socket_engine.dart
+++ b/packages/stream_core/lib/src/ws/client/engine/stream_web_socket_engine.dart
@@ -34,11 +34,9 @@ class StreamWebSocketEngine<Inc, Out> implements WebSocketEngine<Out> {
   /// Creates a new instance of [StreamWebSocketEngine].
   StreamWebSocketEngine({
     WebSocketProvider? wsProvider,
-    WebSocketEngineListener<Inc>? listener,
-    required WebSocketMessageCodec<Inc, Out> messageCodec,
-  }) : _wsProvider = wsProvider ?? _createWebSocket,
-       _messageCodec = messageCodec,
-       _listener = listener;
+    this._listener,
+    required this._messageCodec,
+  }) : _wsProvider = wsProvider ?? _createWebSocket;
 
   final WebSocketProvider _wsProvider;
   final WebSocketMessageCodec<Inc, Out> _messageCodec;
diff --git a/packages/stream_core/lib/src/ws/client/reconnect/connection_recovery_handler.dart b/packages/stream_core/lib/src/ws/client/reconnect/connection_recovery_handler.dart
index eb89c0dd..55c4a0af 100644
--- a/packages/stream_core/lib/src/ws/client/reconnect/connection_recovery_handler.dart
+++ b/packages/stream_core/lib/src/ws/client/reconnect/connection_recovery_handler.dart
@@ -39,12 +39,11 @@ class ConnectionRecoveryHandler extends Disposable {
     required StreamWebSocketClient client,
     NetworkStateProvider? networkStateProvider,
     LifecycleStateProvider? lifecycleStateProvider,
-    bool keepConnectionAliveInBackground = false,
+    this._keepConnectionAliveInBackground = false,
     List<AutomaticReconnectionPolicy>? policies,
     RetryStrategy? retryStrategy,
   }) : _client = client,
        _reconnectStrategy = retryStrategy ?? RetryStrategy(),
-       _keepConnectionAliveInBackground = keepConnectionAliveInBackground,
        _policies = <AutomaticReconnectionPolicy>[
          ...?policies,
          WebSocketAutomaticReconnectionPolicy(
diff --git a/packages/stream_core/lib/src/ws/client/web_socket_health_monitor.dart b/packages/stream_core/lib/src/ws/client/web_socket_health_monitor.dart
index 940eb7b8..f4299c32 100644
--- a/packages/stream_core/lib/src/ws/client/web_socket_health_monitor.dart
+++ b/packages/stream_core/lib/src/ws/client/web_socket_health_monitor.dart
@@ -41,10 +41,10 @@ abstract interface class WebSocketHealthListener {
 class WebSocketHealthMonitor {
   /// Creates a new instance of [WebSocketHealthMonitor].
   WebSocketHealthMonitor({
-    required WebSocketHealthListener listener,
+    required this._listener,
     this.pingInterval = const Duration(seconds: 25),
     this.timeoutThreshold = const Duration(seconds: 3),
-  }) : _listener = listener;
+  });
 
   /// The interval between ping requests for health checking.
   final Duration pingInterval;
diff --git a/packages/stream_core/pubspec.yaml b/packages/stream_core/pubspec.yaml
index aaf62940..c28d1a61 100644
--- a/packages/stream_core/pubspec.yaml
+++ b/packages/stream_core/pubspec.yaml
@@ -16,7 +16,7 @@ repository: https://github.com/GetStream/stream-core-flutter
 #   2. Add it to the melos.yaml file for future updates.
 
 environment:
-  sdk: ^3.10.0
+  sdk: ^3.12.0
 
 dependencies:
   collection: ^1.19.0
diff --git a/packages/stream_core_flutter/CHANGELOG.md b/packages/stream_core_flutter/CHANGELOG.md
index 88ef9c01..6f0e6773 100644
--- a/packages/stream_core_flutter/CHANGELOG.md
+++ b/packages/stream_core_flutter/CHANGELOG.md
@@ -1,3 +1,17 @@
+## Upcoming
+
+### 🛑 Breaking / Removals
+
+- Migrated to the `material_ui` package. Every Material type this package exposes —
+  `StreamTheme` (a `ThemeExtension`), `ThemeData`, `ColorScheme`, widgets — now comes from
+  `package:material_ui/material_ui.dart` and is unrelated to the same-named type in
+  `package:flutter/material.dart`. Apps must import `material_ui` (and `cupertino_ui`) and use its
+  `MaterialApp`, which also supplies the `MaterialLocalizations` the components read.
+
+### 🔄 Changed
+
+- Raised the minimum Flutter version to `>=3.44.0` and the Dart SDK to `^3.12.0`.
+
 ## 0.5.0
 
 ### ✨ Features
diff --git a/packages/stream_core_flutter/lib/src/a11y/stream_accessibility_autofocus.dart b/packages/stream_core_flutter/lib/src/a11y/stream_accessibility_autofocus.dart
index b3cb871b..47337808 100644
--- a/packages/stream_core_flutter/lib/src/a11y/stream_accessibility_autofocus.dart
+++ b/packages/stream_core_flutter/lib/src/a11y/stream_accessibility_autofocus.dart
@@ -1,7 +1,7 @@
 import 'dart:async';
 
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
+import 'package:material_ui/material_ui.dart';
 
 /// A behavior-only wrapper that requests screen-reader focus on [child]
 /// shortly after mount.
diff --git a/packages/stream_core_flutter/lib/src/a11y/stream_semantics_announcer.dart b/packages/stream_core_flutter/lib/src/a11y/stream_semantics_announcer.dart
index 178b29e2..21474000 100644
--- a/packages/stream_core_flutter/lib/src/a11y/stream_semantics_announcer.dart
+++ b/packages/stream_core_flutter/lib/src/a11y/stream_semantics_announcer.dart
@@ -2,8 +2,8 @@
 
 import 'dart:async';
 
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
+import 'package:material_ui/material_ui.dart';
 
 /// Dispatches screen-reader announcements with platform-aware delivery.
 ///
diff --git a/packages/stream_core_flutter/lib/src/a11y/stream_semantics_transition_announcer.dart b/packages/stream_core_flutter/lib/src/a11y/stream_semantics_transition_announcer.dart
index 811ad231..561a1f5b 100644
--- a/packages/stream_core_flutter/lib/src/a11y/stream_semantics_transition_announcer.dart
+++ b/packages/stream_core_flutter/lib/src/a11y/stream_semantics_transition_announcer.dart
@@ -1,5 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
+import 'package:material_ui/material_ui.dart';
+
 import 'stream_semantics_announcer.dart';
 
 /// A behavior-only wrapper that announces transitions on [listenable] to the
diff --git a/packages/stream_core_flutter/lib/src/components/accessories/stream_audio_waveform.dart b/packages/stream_core_flutter/lib/src/components/accessories/stream_audio_waveform.dart
index 217efd97..d4b01b3b 100644
--- a/packages/stream_core_flutter/lib/src/components/accessories/stream_audio_waveform.dart
+++ b/packages/stream_core_flutter/lib/src/components/accessories/stream_audio_waveform.dart
@@ -2,7 +2,7 @@ import 'dart:math' as math;
 import 'dart:ui';
 
 import 'package:collection/collection.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/components/stream_audio_waveform_theme.dart';
 import '../../theme/stream_theme_extensions.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/accessories/stream_emoji.dart b/packages/stream_core_flutter/lib/src/components/accessories/stream_emoji.dart
index f238dbc3..4c01bd32 100644
--- a/packages/stream_core_flutter/lib/src/components/accessories/stream_emoji.dart
+++ b/packages/stream_core_flutter/lib/src/components/accessories/stream_emoji.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../common/stream_network_image.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar.dart b/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar.dart
index 3dde3f05..a0cff1ac 100644
--- a/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar.dart
+++ b/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_avatar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_group.dart b/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_group.dart
index e8c48df4..66b26cc2 100644
--- a/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_group.dart
+++ b/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_group.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_avatar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_stack.dart b/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_stack.dart
index 654685f4..ad8dae25 100644
--- a/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_stack.dart
+++ b/packages/stream_core_flutter/lib/src/components/avatar/stream_avatar_stack.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_avatar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/badge/stream_badge_count.dart b/packages/stream_core_flutter/lib/src/components/badge/stream_badge_count.dart
index 96516d13..0e5909d9 100644
--- a/packages/stream_core_flutter/lib/src/components/badge/stream_badge_count.dart
+++ b/packages/stream_core_flutter/lib/src/components/badge/stream_badge_count.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_badge_count_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/badge/stream_badge_notification.dart b/packages/stream_core_flutter/lib/src/components/badge/stream_badge_notification.dart
index c38b4eca..a8bb00d4 100644
--- a/packages/stream_core_flutter/lib/src/components/badge/stream_badge_notification.dart
+++ b/packages/stream_core_flutter/lib/src/components/badge/stream_badge_notification.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_badge_notification_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/badge/stream_error_badge.dart b/packages/stream_core_flutter/lib/src/components/badge/stream_error_badge.dart
index b3088fc9..2904502e 100644
--- a/packages/stream_core_flutter/lib/src/components/badge/stream_error_badge.dart
+++ b/packages/stream_core_flutter/lib/src/components/badge/stream_error_badge.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/primitives/stream_icons.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/badge/stream_image_source_badge.dart b/packages/stream_core_flutter/lib/src/components/badge/stream_image_source_badge.dart
index da83df14..587206d8 100644
--- a/packages/stream_core_flutter/lib/src/components/badge/stream_image_source_badge.dart
+++ b/packages/stream_core_flutter/lib/src/components/badge/stream_image_source_badge.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:svg_icon_widget/svg_icon_widget.dart';
 
 import '../../factory/stream_component_factory.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/badge/stream_online_indicator.dart b/packages/stream_core_flutter/lib/src/components/badge/stream_online_indicator.dart
index 09276bce..8766372c 100644
--- a/packages/stream_core_flutter/lib/src/components/badge/stream_online_indicator.dart
+++ b/packages/stream_core_flutter/lib/src/components/badge/stream_online_indicator.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_online_indicator_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/badge/stream_retry_badge.dart b/packages/stream_core_flutter/lib/src/components/badge/stream_retry_badge.dart
index 1c263b5e..0bcb8fcc 100644
--- a/packages/stream_core_flutter/lib/src/components/badge/stream_retry_badge.dart
+++ b/packages/stream_core_flutter/lib/src/components/badge/stream_retry_badge.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/primitives/stream_icons.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/buttons/stream_button.dart b/packages/stream_core_flutter/lib/src/components/buttons/stream_button.dart
index a5e2e110..fc4a9040 100644
--- a/packages/stream_core_flutter/lib/src/components/buttons/stream_button.dart
+++ b/packages/stream_core_flutter/lib/src/components/buttons/stream_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_button_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/buttons/stream_emoji_button.dart b/packages/stream_core_flutter/lib/src/components/buttons/stream_emoji_button.dart
index 036022a8..20461a2a 100644
--- a/packages/stream_core_flutter/lib/src/components/buttons/stream_emoji_button.dart
+++ b/packages/stream_core_flutter/lib/src/components/buttons/stream_emoji_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_emoji_button_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/buttons/stream_jump_to_unread_button.dart b/packages/stream_core_flutter/lib/src/components/buttons/stream_jump_to_unread_button.dart
index 88cdada7..8eb8c046 100644
--- a/packages/stream_core_flutter/lib/src/components/buttons/stream_jump_to_unread_button.dart
+++ b/packages/stream_core_flutter/lib/src/components/buttons/stream_jump_to_unread_button.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_button_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_checkbox.dart b/packages/stream_core_flutter/lib/src/components/common/stream_checkbox.dart
index 1c1b0887..bfa9837c 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_checkbox.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_checkbox.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_checkbox_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_intrinsic_flex.dart b/packages/stream_core_flutter/lib/src/components/common/stream_intrinsic_flex.dart
index 95f30402..4a593ebb 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_intrinsic_flex.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_intrinsic_flex.dart
@@ -1,8 +1,8 @@
 import 'dart:math' as math;
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
+import 'package:material_ui/material_ui.dart';
 
 /// A widget that displays its children in a one-dimensional array,
 /// shrink-wrapping its cross-axis to the widest (or tallest) child.
@@ -494,28 +494,20 @@ class _RenderStreamIntrinsicFlex extends RenderBox
         ContainerRenderObjectMixin<RenderBox, _IntrinsicFlexParentData>,
         RenderBoxContainerDefaultsMixin<RenderBox, _IntrinsicFlexParentData> {
   _RenderStreamIntrinsicFlex({
-    required Axis direction,
-    required MainAxisAlignment mainAxisAlignment,
-    required MainAxisSize mainAxisSize,
-    required double spacing,
+    required this._direction,
+    required this._mainAxisAlignment,
+    required this._mainAxisSize,
+    required this._spacing,
     required CrossAxisAlignment crossAxisAlignment,
-    required TextBaseline? textBaseline,
-    required TextDirection? textDirection,
-    required VerticalDirection verticalDirection,
-    required Clip clipBehavior,
+    required this._textBaseline,
+    required this._textDirection,
+    required this._verticalDirection,
+    required this._clipBehavior,
   }) : assert(
          crossAxisAlignment != CrossAxisAlignment.stretch,
          'StreamIntrinsicFlex does not support $crossAxisAlignment.',
        ),
-       _direction = direction,
-       _mainAxisAlignment = mainAxisAlignment,
-       _mainAxisSize = mainAxisSize,
-       _spacing = spacing,
-       _crossAxisAlignment = crossAxisAlignment,
-       _textBaseline = textBaseline,
-       _textDirection = textDirection,
-       _verticalDirection = verticalDirection,
-       _clipBehavior = clipBehavior;
+       _crossAxisAlignment = crossAxisAlignment;
 
   Axis get direction => _direction;
   Axis _direction;
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_loading_spinner.dart b/packages/stream_core_flutter/lib/src/components/common/stream_loading_spinner.dart
index 74bb5785..0a025ebd 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_loading_spinner.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_loading_spinner.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/stream_theme_extensions.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_network_image.dart b/packages/stream_core_flutter/lib/src/components/common/stream_network_image.dart
index 1afb2400..4109ef10 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_network_image.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_network_image.dart
@@ -1,5 +1,5 @@
 import 'package:cached_network_image_ce/cached_network_image.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../cache/internal/stream_image_cache.dart';
 import '../../factory/stream_component_factory.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_progress_bar.dart b/packages/stream_core_flutter/lib/src/components/common/stream_progress_bar.dart
index 98565088..ec00e1b3 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_progress_bar.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_progress_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_progress_bar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_safe_area.dart b/packages/stream_core_flutter/lib/src/components/common/stream_safe_area.dart
index 59ec42bf..b19b0485 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_safe_area.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_safe_area.dart
@@ -73,8 +73,8 @@ class StreamSafeArea extends StatelessWidget {
   /// clamped to `[0, 1]`.
   const StreamSafeArea.driven({
     super.key,
-    required ValueListenable<double> listenable,
-    EdgeInsets to = EdgeInsets.zero,
+    required ValueListenable<double> this._listenable,
+    this._to = EdgeInsets.zero,
     this.left = true,
     this.top = true,
     this.right = true,
@@ -83,8 +83,7 @@ class StreamSafeArea extends StatelessWidget {
     this.margin = EdgeInsets.zero,
     this.maintainBottomViewPadding = false,
     required this.child,
-  }) : _listenable = listenable,
-       _to = to;
+  });
 
   /// Whether to avoid system intrusions on the left ([minimum] and [margin] apply either way).
   final bool left;
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_tap_target_padding.dart b/packages/stream_core_flutter/lib/src/components/common/stream_tap_target_padding.dart
index 29d65790..993552d6 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_tap_target_padding.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_tap_target_padding.dart
@@ -84,14 +84,11 @@ class StreamTapTargetPadding extends SingleChildRenderObjectWidget {
 
 class _RenderTapTargetPadding extends RenderShiftedBox {
   _RenderTapTargetPadding({
-    required Size minSize,
-    required AlignmentGeometry alignment,
-    required TextDirection? textDirection,
+    required this._minSize,
+    required this._alignment,
+    required this._textDirection,
     RenderBox? child,
-  }) : _minSize = minSize,
-       _alignment = alignment,
-       _textDirection = textDirection,
-       super(child);
+  }) : super(child);
 
   Size get minSize => _minSize;
   Size _minSize;
diff --git a/packages/stream_core_flutter/lib/src/components/common/stream_text_input.dart b/packages/stream_core_flutter/lib/src/components/common/stream_text_input.dart
index a1fe3601..2c26b53a 100644
--- a/packages/stream_core_flutter/lib/src/components/common/stream_text_input.dart
+++ b/packages/stream_core_flutter/lib/src/components/common/stream_text_input.dart
@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:flutter/services.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_text_input_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu.dart b/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu.dart
index 65f8e9b2..9965123b 100644
--- a/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu.dart
+++ b/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/components/stream_context_menu_theme.dart';
 import '../../theme/primitives/stream_radius.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu_action.dart b/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu_action.dart
index 0ca7d97f..15c029b5 100644
--- a/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu_action.dart
+++ b/packages/stream_core_flutter/lib/src/components/context_menu/stream_context_menu_action.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core/stream_core.dart';
 
 import '../../factory/stream_component_factory.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_command_chip.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_command_chip.dart
index 2b64413c..841e6238 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_command_chip.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_command_chip.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_command_chip_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip.dart
index 8b2d4521..32ba6ff7 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_emoji_chip_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip_bar.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip_bar.dart
index 3d4a676e..80e2246e 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip_bar.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_emoji_chip_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/stream_theme_extensions.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_playback_speed_toggle.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_playback_speed_toggle.dart
index 99c19824..2f578ff3 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_playback_speed_toggle.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_playback_speed_toggle.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_playback_speed_toggle_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_remove_control.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_remove_control.dart
index cd3c779e..9779469b 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_remove_control.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_remove_control.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/stream_theme_extensions.dart';
 import '../common/stream_tap_target_padding.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_stepper.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_stepper.dart
index b1b08d89..281cf595 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_stepper.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_stepper.dart
@@ -1,6 +1,6 @@
 import 'dart:math' as math;
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_button_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/controls/stream_switch.dart b/packages/stream_core_flutter/lib/src/components/controls/stream_switch.dart
index 9b3e26ff..9609a47b 100644
--- a/packages/stream_core_flutter/lib/src/components/controls/stream_switch.dart
+++ b/packages/stream_core_flutter/lib/src/components/controls/stream_switch.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_switch_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/emoji/stream_emoji_picker_sheet.dart b/packages/stream_core_flutter/lib/src/components/emoji/stream_emoji_picker_sheet.dart
index b45d2236..5e53f6c6 100644
--- a/packages/stream_core_flutter/lib/src/components/emoji/stream_emoji_picker_sheet.dart
+++ b/packages/stream_core_flutter/lib/src/components/emoji/stream_emoji_picker_sheet.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/components/stream_emoji_button_theme.dart';
 import '../../theme/components/stream_sheet_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/list/stream_list_tile.dart b/packages/stream_core_flutter/lib/src/components/list/stream_list_tile.dart
index 2053f89f..4c9a503a 100644
--- a/packages/stream_core_flutter/lib/src/components/list/stream_list_tile.dart
+++ b/packages/stream_core_flutter/lib/src/components/list/stream_list_tile.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_list_tile_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/media_viewer/stream_media_viewer.dart b/packages/stream_core_flutter/lib/src/components/media_viewer/stream_media_viewer.dart
index 6a02d83b..78ba0466 100644
--- a/packages/stream_core_flutter/lib/src/components/media_viewer/stream_media_viewer.dart
+++ b/packages/stream_core_flutter/lib/src/components/media_viewer/stream_media_viewer.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_app_bar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message/stream_message_annotation.dart b/packages/stream_core_flutter/lib/src/components/message/stream_message_annotation.dart
index a23a8773..69b87e19 100644
--- a/packages/stream_core_flutter/lib/src/components/message/stream_message_annotation.dart
+++ b/packages/stream_core_flutter/lib/src/components/message/stream_message_annotation.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_message_annotation_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message/stream_message_attachment.dart b/packages/stream_core_flutter/lib/src/components/message/stream_message_attachment.dart
index c04d2e3d..f22e1f5d 100644
--- a/packages/stream_core_flutter/lib/src/components/message/stream_message_attachment.dart
+++ b/packages/stream_core_flutter/lib/src/components/message/stream_message_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/components/stream_message_attachment_theme.dart';
 import '../../theme/components/stream_message_item_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message/stream_message_bubble.dart b/packages/stream_core_flutter/lib/src/components/message/stream_message_bubble.dart
index f17653db..dc0981c0 100644
--- a/packages/stream_core_flutter/lib/src/components/message/stream_message_bubble.dart
+++ b/packages/stream_core_flutter/lib/src/components/message/stream_message_bubble.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_message_bubble_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message/stream_message_metadata.dart b/packages/stream_core_flutter/lib/src/components/message/stream_message_metadata.dart
index 8705bc7d..562bddae 100644
--- a/packages/stream_core_flutter/lib/src/components/message/stream_message_metadata.dart
+++ b/packages/stream_core_flutter/lib/src/components/message/stream_message_metadata.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_message_item_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message/stream_message_replies.dart b/packages/stream_core_flutter/lib/src/components/message/stream_message_replies.dart
index ea3fe662..6919f81f 100644
--- a/packages/stream_core_flutter/lib/src/components/message/stream_message_replies.dart
+++ b/packages/stream_core_flutter/lib/src/components/message/stream_message_replies.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_message_item_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message/stream_message_text.dart b/packages/stream_core_flutter/lib/src/components/message/stream_message_text.dart
index c4911eaf..2055fe0c 100644
--- a/packages/stream_core_flutter/lib/src/components/message/stream_message_text.dart
+++ b/packages/stream_core_flutter/lib/src/components/message/stream_message_text.dart
@@ -1,6 +1,8 @@
-import 'package:flutter/material.dart';
+// ignore: migrate_design_widgets
+import 'package:flutter/material.dart' as legacy;
 import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
 import 'package:markdown/markdown.dart' as md;
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core/stream_core.dart';
 
 import '../../factory/stream_component_factory.dart';
@@ -339,23 +341,6 @@ class DefaultStreamMessageText extends StatelessWidget {
       effectiveTextStyle = effectiveTextStyle.merge(emojiStyle);
     }
 
-    final streamThemeData = Theme.of(context).let(
-      (it) => it.copyWith(
-        textTheme: it.textTheme.apply(
-          bodyColor: effectiveTextStyle.color,
-          decoration: effectiveTextStyle.decoration,
-          decorationColor: effectiveTextStyle.decorationColor,
-          decorationStyle: effectiveTextStyle.decorationStyle,
-          fontFamily: effectiveTextStyle.fontFamily,
-          fontFamilyFallback: effectiveTextStyle.fontFamilyFallback,
-        ),
-      ),
-    );
-
-    final markdownSheet = MarkdownStyleSheet.fromTheme(
-      streamThemeData, // Apply stream theme data
-    ).copyWith(p: effectiveTextStyle, a: effectiveLinkStyle).merge(props.styleSheet);
-
     // Prepend mention syntax so `[text](mention[-type]:id)` is intercepted
     // before the standard LinkSyntax, producing `mention` elements.
     // Regular `a` elements are never touched.
@@ -381,24 +366,63 @@ class DefaultStreamMessageText extends StatelessWidget {
       ...?props.builders,
     };
 
+    // `flutter_markdown_plus` is still built on Flutter's Material, whose
+    // `ThemeData` and `MaterialLocalizations` are unrelated types to
+    // `material_ui`'s. The bridge maps the ambient theme into that universe so
+    // the style sheet, and everything `MarkdownBody` builds, resolve.
+    //
+    // TODO(material-ui): drop once flutter_markdown_plus supports material_ui.
+    // https://linear.app/stream/issue/flu-701
     return Padding(
       padding: effectivePadding,
-      child: MarkdownBody(
-        data: props.text,
-        selectable: props.selectable,
-        styleSheet: markdownSheet,
-        styleSheetTheme: .platform,
-        syntaxHighlighter: props.syntaxHighlighter,
-        onTapLink: props.onTapLink,
-        onTapText: props.onTapText,
-        imageBuilder: props.imageBuilder,
-        builders: effectiveBuilders,
-        paddingBuilders: props.paddingBuilders ?? const {},
-        blockSyntaxes: props.blockSyntaxes,
-        inlineSyntaxes: effectiveInlineSyntaxes,
-        extensionSet: props.extensionSet,
-        softLineBreak: props.softLineBreak,
-        fitContent: props.fitContent,
+      // ignore: deprecated_member_use
+      child: MaterialUiCompatibilityBridge(
+        child: Builder(
+          builder: (context) {
+            // The bridge maps the colour scheme and text theme but not the
+            // legacy-only scalars, and `fromTheme` reads all four.
+            final theme = Theme.of(context);
+
+            final markdownTheme = legacy.Theme.of(context).let(
+              (it) => it.copyWith(
+                primaryColor: theme.primaryColor,
+                cardColor: theme.cardColor,
+                dividerColor: theme.dividerColor,
+                cardTheme: legacy.CardThemeData(color: theme.cardTheme.color),
+                textTheme: it.textTheme.apply(
+                  bodyColor: effectiveTextStyle.color,
+                  decoration: effectiveTextStyle.decoration,
+                  decorationColor: effectiveTextStyle.decorationColor,
+                  decorationStyle: effectiveTextStyle.decorationStyle,
+                  fontFamily: effectiveTextStyle.fontFamily,
+                  fontFamilyFallback: effectiveTextStyle.fontFamilyFallback,
+                ),
+              ),
+            );
+
+            final markdownSheet = MarkdownStyleSheet.fromTheme(
+              markdownTheme,
+            ).copyWith(p: effectiveTextStyle, a: effectiveLinkStyle).merge(props.styleSheet);
+
+            return MarkdownBody(
+              data: props.text,
+              selectable: props.selectable,
+              styleSheet: markdownSheet,
+              styleSheetTheme: .platform,
+              syntaxHighlighter: props.syntaxHighlighter,
+              onTapLink: props.onTapLink,
+              onTapText: props.onTapText,
+              imageBuilder: props.imageBuilder,
+              builders: effectiveBuilders,
+              paddingBuilders: props.paddingBuilders ?? const {},
+              blockSyntaxes: props.blockSyntaxes,
+              inlineSyntaxes: effectiveInlineSyntaxes,
+              extensionSet: props.extensionSet,
+              softLineBreak: props.softLineBreak,
+              fitContent: props.fitContent,
+            );
+          },
+        ),
       ),
     );
   }
diff --git a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_attachment.dart b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_attachment.dart
index b886711d..0f36736c 100644
--- a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_attachment.dart
+++ b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../../factory/stream_component_factory.dart';
 import '../../../theme/components/stream_message_composer_attachment_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_edit_message_attachment.dart b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_edit_message_attachment.dart
index 287f795a..90e3d79c 100644
--- a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_edit_message_attachment.dart
+++ b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_edit_message_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../../factory/stream_component_factory.dart';
 import '../../../theme/components/stream_message_composer_attachment_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_link_preview_attachment.dart b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_link_preview_attachment.dart
index 79afd0b7..077cc3d7 100644
--- a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_link_preview_attachment.dart
+++ b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_link_preview_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../../factory/stream_component_factory.dart';
 import '../../../theme/components/stream_message_composer_attachment_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_reply_attachment.dart b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_reply_attachment.dart
index 93f45662..84a9a0a2 100644
--- a/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_reply_attachment.dart
+++ b/packages/stream_core_flutter/lib/src/components/message_composer/attachment/stream_message_composer_reply_attachment.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../../factory/stream_component_factory.dart';
 import '../../../theme/components/stream_message_composer_attachment_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/reaction/stream_reaction_picker.dart b/packages/stream_core_flutter/lib/src/components/reaction/stream_reaction_picker.dart
index 59c8c48e..36988470 100644
--- a/packages/stream_core_flutter/lib/src/components/reaction/stream_reaction_picker.dart
+++ b/packages/stream_core_flutter/lib/src/components/reaction/stream_reaction_picker.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_reaction_picker_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/reaction/stream_reactions.dart b/packages/stream_core_flutter/lib/src/components/reaction/stream_reactions.dart
index 48cc4f4b..5298d189 100644
--- a/packages/stream_core_flutter/lib/src/components/reaction/stream_reactions.dart
+++ b/packages/stream_core_flutter/lib/src/components/reaction/stream_reactions.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core/stream_core.dart';
 
 import '../../factory/stream_component_factory.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/scaffold/stream_scaffold.dart b/packages/stream_core_flutter/lib/src/components/scaffold/stream_scaffold.dart
index 3db36e84..c69a10d3 100644
--- a/packages/stream_core_flutter/lib/src/components/scaffold/stream_scaffold.dart
+++ b/packages/stream_core_flutter/lib/src/components/scaffold/stream_scaffold.dart
@@ -1,7 +1,7 @@
 import 'dart:math' as math;
 
 import 'package:flutter/gestures.dart' show DragStartBehavior;
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/components/stream_app_bar_theme.dart';
 import '../../theme/semantics/stream_color_scheme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/sheet/stream_sheet.dart b/packages/stream_core_flutter/lib/src/components/sheet/stream_sheet.dart
index c972d6bd..f24cf24e 100644
--- a/packages/stream_core_flutter/lib/src/components/sheet/stream_sheet.dart
+++ b/packages/stream_core_flutter/lib/src/components/sheet/stream_sheet.dart
@@ -1,7 +1,7 @@
 import 'dart:math' as math;
 
 import 'package:flutter/gestures.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../theme/components/stream_sheet_theme.dart';
 import '../../theme/primitives/stream_colors.dart';
@@ -656,9 +656,9 @@ class StreamSheetRoute<T> extends PageRoute<T> {
     super.requestFocus,
     required this.builder,
     this.backgroundColor,
-    Color? barrierColor,
+    this._barrierColor,
     this.barrierLabel,
-    String? barrierOnTapHint,
+    this._barrierOnTapHint,
     this.shape,
     this.borderRadius,
     this.constraints,
@@ -672,8 +672,7 @@ class StreamSheetRoute<T> extends PageRoute<T> {
     this.onDragEnd,
     this.parentSheet,
     this.capturedThemes,
-  }) : _barrierColor = barrierColor,
-       _barrierOnTapHint = barrierOnTapHint;
+  });
 
   /// Builds the primary contents of the sheet. The provided [ScrollController]
   /// should be attached to the topmost scrollable widget inside the sheet.
diff --git a/packages/stream_core_flutter/lib/src/components/snackbar/stream_snackbar.dart b/packages/stream_core_flutter/lib/src/components/snackbar/stream_snackbar.dart
index 5052ca55..88d30fba 100644
--- a/packages/stream_core_flutter/lib/src/components/snackbar/stream_snackbar.dart
+++ b/packages/stream_core_flutter/lib/src/components/snackbar/stream_snackbar.dart
@@ -1,7 +1,7 @@
 import 'dart:async';
 import 'dart:collection';
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_button_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/toolbar/stream_app_bar.dart b/packages/stream_core_flutter/lib/src/components/toolbar/stream_app_bar.dart
index 9dfdda2a..685e473f 100644
--- a/packages/stream_core_flutter/lib/src/components/toolbar/stream_app_bar.dart
+++ b/packages/stream_core_flutter/lib/src/components/toolbar/stream_app_bar.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_app_bar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_app_bar.dart b/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_app_bar.dart
index 77458e60..ec26a587 100644
--- a/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_app_bar.dart
+++ b/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_app_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_bottom_app_bar_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_nav_bar.dart b/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_nav_bar.dart
index 44ce4140..ace383bc 100644
--- a/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_nav_bar.dart
+++ b/packages/stream_core_flutter/lib/src/components/toolbar/stream_bottom_nav_bar.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_badge_notification_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/toolbar/stream_sheet_header.dart b/packages/stream_core_flutter/lib/src/components/toolbar/stream_sheet_header.dart
index a0d66c2b..b6b738f6 100644
--- a/packages/stream_core_flutter/lib/src/components/toolbar/stream_sheet_header.dart
+++ b/packages/stream_core_flutter/lib/src/components/toolbar/stream_sheet_header.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 import '../../factory/stream_component_factory.dart';
 import '../../theme/components/stream_button_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/components/toolbar/stream_toolbar.dart b/packages/stream_core_flutter/lib/src/components/toolbar/stream_toolbar.dart
index 9ba21cee..eb912c1b 100644
--- a/packages/stream_core_flutter/lib/src/components/toolbar/stream_toolbar.dart
+++ b/packages/stream_core_flutter/lib/src/components/toolbar/stream_toolbar.dart
@@ -1,6 +1,6 @@
 import 'dart:math' as math;
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 /// Default height of [StreamAppBar], [StreamBottomAppBar], and
 /// [StreamSheetHeader] per the Stream design system.
diff --git a/packages/stream_core_flutter/lib/src/factory/stream_component_factory.dart b/packages/stream_core_flutter/lib/src/factory/stream_component_factory.dart
index b332a687..6c215d19 100644
--- a/packages/stream_core_flutter/lib/src/factory/stream_component_factory.dart
+++ b/packages/stream_core_flutter/lib/src/factory/stream_component_factory.dart
@@ -668,8 +668,8 @@ class StreamComponentBuilders with _$StreamComponentBuilders {
 final class StreamComponentBuilderExtension<T> {
   /// Creates a builder extension for a component with Props type [T].
   const StreamComponentBuilderExtension({
-    required StreamComponentBuilder<T> builder,
-  }) : _builder = builder;
+    required this._builder,
+  });
 
   // The internal builder function that creates the widget from the context and props.
   final StreamComponentBuilder<T> _builder;
diff --git a/packages/stream_core_flutter/lib/src/theme/components/stream_button_theme.dart b/packages/stream_core_flutter/lib/src/theme/components/stream_button_theme.dart
index fa6e4d7c..875e7807 100644
--- a/packages/stream_core_flutter/lib/src/theme/components/stream_button_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/components/stream_button_theme.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
 import '../stream_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/theme/components/stream_command_chip_theme.dart b/packages/stream_core_flutter/lib/src/theme/components/stream_command_chip_theme.dart
index 5e05c20b..c405f63d 100644
--- a/packages/stream_core_flutter/lib/src/theme/components/stream_command_chip_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/components/stream_command_chip_theme.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
 import '../stream_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/theme/components/stream_emoji_chip_theme.dart b/packages/stream_core_flutter/lib/src/theme/components/stream_emoji_chip_theme.dart
index a912c281..8a45f693 100644
--- a/packages/stream_core_flutter/lib/src/theme/components/stream_emoji_chip_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/components/stream_emoji_chip_theme.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
 import '../stream_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/theme/components/stream_message_bubble_theme.dart b/packages/stream_core_flutter/lib/src/theme/components/stream_message_bubble_theme.dart
index 3ed9e8cf..fb18cbb1 100644
--- a/packages/stream_core_flutter/lib/src/theme/components/stream_message_bubble_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/components/stream_message_bubble_theme.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core/stream_core.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
diff --git a/packages/stream_core_flutter/lib/src/theme/components/stream_playback_speed_toggle_theme.dart b/packages/stream_core_flutter/lib/src/theme/components/stream_playback_speed_toggle_theme.dart
index f13a902f..d638e173 100644
--- a/packages/stream_core_flutter/lib/src/theme/components/stream_playback_speed_toggle_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/components/stream_playback_speed_toggle_theme.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
 import '../stream_theme.dart';
diff --git a/packages/stream_core_flutter/lib/src/theme/semantics/stream_color_scheme.dart b/packages/stream_core_flutter/lib/src/theme/semantics/stream_color_scheme.dart
index 3f8ad7d3..d945a41d 100644
--- a/packages/stream_core_flutter/lib/src/theme/semantics/stream_color_scheme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/semantics/stream_color_scheme.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core/stream_core.dart' show Standard;
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
diff --git a/packages/stream_core_flutter/lib/src/theme/semantics/stream_text_theme.dart b/packages/stream_core_flutter/lib/src/theme/semantics/stream_text_theme.dart
index 4a27553f..89fdca68 100644
--- a/packages/stream_core_flutter/lib/src/theme/semantics/stream_text_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/semantics/stream_text_theme.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
 import '../primitives/stream_typography.dart';
diff --git a/packages/stream_core_flutter/lib/src/theme/stream_floating_fade.dart b/packages/stream_core_flutter/lib/src/theme/stream_floating_fade.dart
index 07b4ff31..4a57eb3b 100644
--- a/packages/stream_core_flutter/lib/src/theme/stream_floating_fade.dart
+++ b/packages/stream_core_flutter/lib/src/theme/stream_floating_fade.dart
@@ -1,4 +1,4 @@
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 
 /// Builds a [LinearGradient] that fades from a solid [color] into transparent,
 /// suitable for floating app bars, bottom navigation bars, and composers.
diff --git a/packages/stream_core_flutter/lib/src/theme/stream_theme.dart b/packages/stream_core_flutter/lib/src/theme/stream_theme.dart
index 0371732d..5993ae8f 100644
--- a/packages/stream_core_flutter/lib/src/theme/stream_theme.dart
+++ b/packages/stream_core_flutter/lib/src/theme/stream_theme.dart
@@ -1,5 +1,5 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:theme_extensions_builder_annotation/theme_extensions_builder_annotation.dart';
 
 import 'components/stream_app_bar_theme.dart';
diff --git a/packages/stream_core_flutter/pubspec.yaml b/packages/stream_core_flutter/pubspec.yaml
index 7a0be962..32def6c5 100644
--- a/packages/stream_core_flutter/pubspec.yaml
+++ b/packages/stream_core_flutter/pubspec.yaml
@@ -4,8 +4,8 @@ version: 0.5.0
 homepage: https://github.com/GetStream/stream-core-flutter
 
 environment:
-  sdk: ^3.10.0
-  flutter: ">=3.38.1"
+  sdk: ^3.12.0
+  flutter: ">=3.44.0"
 
 dependencies:
   cached_network_image_ce: ^4.9.0
@@ -16,6 +16,7 @@ dependencies:
   flutter_svg: ^2.2.3
   markdown: ^7.3.0
   material_color_utilities: ">=0.11.0 <0.14.0"
+  material_ui: ^1.0.0
   path: ^1.9.0
   path_provider: ^2.1.5
   shimmer: ^3.0.0
diff --git a/packages/stream_core_flutter/test/a11y/stream_accessibility_autofocus_test.dart b/packages/stream_core_flutter/test/a11y/stream_accessibility_autofocus_test.dart
index 6e24f2bc..534c4b87 100644
--- a/packages/stream_core_flutter/test/a11y/stream_accessibility_autofocus_test.dart
+++ b/packages/stream_core_flutter/test/a11y/stream_accessibility_autofocus_test.dart
@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/services.dart' show SystemChannels;
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/a11y/stream_semantics_announcer_test.dart b/packages/stream_core_flutter/test/a11y/stream_semantics_announcer_test.dart
index 1cc39351..ecce5c1a 100644
--- a/packages/stream_core_flutter/test/a11y/stream_semantics_announcer_test.dart
+++ b/packages/stream_core_flutter/test/a11y/stream_semantics_announcer_test.dart
@@ -1,7 +1,7 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:flutter/services.dart' show SystemChannels;
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/accessories/stream_audio_waveform_golden_test.dart b/packages/stream_core_flutter/test/components/accessories/stream_audio_waveform_golden_test.dart
index a8ccc54b..0ea21df9 100644
--- a/packages/stream_core_flutter/test/components/accessories/stream_audio_waveform_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/accessories/stream_audio_waveform_golden_test.dart
@@ -3,8 +3,8 @@
 import 'dart:math' as math;
 
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 final List<double> _sampleWaveform = List.generate(
diff --git a/packages/stream_core_flutter/test/components/avatar/stream_avatar_golden_test.dart b/packages/stream_core_flutter/test/components/avatar/stream_avatar_golden_test.dart
index 5c92c8b9..32348ded 100644
--- a/packages/stream_core_flutter/test/components/avatar/stream_avatar_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/avatar/stream_avatar_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/avatar/stream_avatar_group_test.dart b/packages/stream_core_flutter/test/components/avatar/stream_avatar_group_test.dart
index 7b8166c5..2148ee38 100644
--- a/packages/stream_core_flutter/test/components/avatar/stream_avatar_group_test.dart
+++ b/packages/stream_core_flutter/test/components/avatar/stream_avatar_group_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/avatar/stream_avatar_stack_test.dart b/packages/stream_core_flutter/test/components/avatar/stream_avatar_stack_test.dart
index 6c54ed1a..2bba1085 100644
--- a/packages/stream_core_flutter/test/components/avatar/stream_avatar_stack_test.dart
+++ b/packages/stream_core_flutter/test/components/avatar/stream_avatar_stack_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/avatar/stream_avatar_test.dart b/packages/stream_core_flutter/test/components/avatar/stream_avatar_test.dart
index 644e7e66..d4695aca 100644
--- a/packages/stream_core_flutter/test/components/avatar/stream_avatar_test.dart
+++ b/packages/stream_core_flutter/test/components/avatar/stream_avatar_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/badge/stream_badge_notification_golden_test.dart b/packages/stream_core_flutter/test/components/badge/stream_badge_notification_golden_test.dart
index c1b04da3..26729dc5 100644
--- a/packages/stream_core_flutter/test/components/badge/stream_badge_notification_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/badge/stream_badge_notification_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/badge/stream_media_badge_golden_test.dart b/packages/stream_core_flutter/test/components/badge/stream_media_badge_golden_test.dart
index 0478762b..b4f9a364 100644
--- a/packages/stream_core_flutter/test/components/badge/stream_media_badge_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/badge/stream_media_badge_golden_test.dart
@@ -1,8 +1,8 @@
 // ignore_for_file: avoid_redundant_argument_values
 
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/badge/stream_media_badge_semantics_test.dart b/packages/stream_core_flutter/test/components/badge/stream_media_badge_semantics_test.dart
index 43027f28..fef8d3c3 100644
--- a/packages/stream_core_flutter/test/components/badge/stream_media_badge_semantics_test.dart
+++ b/packages/stream_core_flutter/test/components/badge/stream_media_badge_semantics_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/buttons/stream_button_golden_test.dart b/packages/stream_core_flutter/test/components/buttons/stream_button_golden_test.dart
index 8f888673..6b174e8c 100644
--- a/packages/stream_core_flutter/test/components/buttons/stream_button_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/buttons/stream_button_golden_test.dart
@@ -1,8 +1,8 @@
 // ignore_for_file: avoid_redundant_argument_values
 
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/buttons/stream_button_test.dart b/packages/stream_core_flutter/test/components/buttons/stream_button_test.dart
index c50f6992..e30d0517 100644
--- a/packages/stream_core_flutter/test/components/buttons/stream_button_test.dart
+++ b/packages/stream_core_flutter/test/components/buttons/stream_button_test.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/gestures.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(
diff --git a/packages/stream_core_flutter/test/components/common/stream_network_image_test.dart b/packages/stream_core_flutter/test/components/common/stream_network_image_test.dart
index 1afe4edd..2a273a80 100644
--- a/packages/stream_core_flutter/test/components/common/stream_network_image_test.dart
+++ b/packages/stream_core_flutter/test/components/common/stream_network_image_test.dart
@@ -1,6 +1,6 @@
 import 'package:cached_network_image_ce/cached_network_image.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/common/stream_safe_area_test.dart b/packages/stream_core_flutter/test/components/common/stream_safe_area_test.dart
index 0315a0ac..a3eacbeb 100644
--- a/packages/stream_core_flutter/test/components/common/stream_safe_area_test.dart
+++ b/packages/stream_core_flutter/test/components/common/stream_safe_area_test.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/common/stream_text_input_test.dart b/packages/stream_core_flutter/test/components/common/stream_text_input_test.dart
index c22c5dca..9936a61c 100644
--- a/packages/stream_core_flutter/test/components/common/stream_text_input_test.dart
+++ b/packages/stream_core_flutter/test/components/common/stream_text_input_test.dart
@@ -1,7 +1,7 @@
 import 'dart:ui' show SemanticsAction, Tristate;
 
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/controls/stream_command_chip_golden_test.dart b/packages/stream_core_flutter/test/components/controls/stream_command_chip_golden_test.dart
index 36845527..85b75c95 100644
--- a/packages/stream_core_flutter/test/components/controls/stream_command_chip_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/controls/stream_command_chip_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/controls/stream_remove_control_golden_test.dart b/packages/stream_core_flutter/test/components/controls/stream_remove_control_golden_test.dart
index bba3b31b..1fa35a1f 100644
--- a/packages/stream_core_flutter/test/components/controls/stream_remove_control_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/controls/stream_remove_control_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/controls/stream_remove_control_test.dart b/packages/stream_core_flutter/test/components/controls/stream_remove_control_test.dart
index db70968d..48c58001 100644
--- a/packages/stream_core_flutter/test/components/controls/stream_remove_control_test.dart
+++ b/packages/stream_core_flutter/test/components/controls/stream_remove_control_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/controls/stream_stepper_semantics_test.dart b/packages/stream_core_flutter/test/components/controls/stream_stepper_semantics_test.dart
index b265caef..60f0694e 100644
--- a/packages/stream_core_flutter/test/components/controls/stream_stepper_semantics_test.dart
+++ b/packages/stream_core_flutter/test/components/controls/stream_stepper_semantics_test.dart
@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart' show SemanticsAction;
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/media_viewer/stream_media_viewer_test.dart b/packages/stream_core_flutter/test/components/media_viewer/stream_media_viewer_test.dart
index fe27e700..59f2917b 100644
--- a/packages/stream_core_flutter/test/components/media_viewer/stream_media_viewer_test.dart
+++ b/packages/stream_core_flutter/test/components/media_viewer/stream_media_viewer_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 const _childKey = Key('media-child');
diff --git a/packages/stream_core_flutter/test/components/message/stream_message_presentation_test.dart b/packages/stream_core_flutter/test/components/message/stream_message_presentation_test.dart
index 8aee79a8..f83da91c 100644
--- a/packages/stream_core_flutter/test/components/message/stream_message_presentation_test.dart
+++ b/packages/stream_core_flutter/test/components/message/stream_message_presentation_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
 /// Verifies that the metadata, annotation and replies defaults switch their
diff --git a/packages/stream_core_flutter/test/components/message/stream_message_text_test.dart b/packages/stream_core_flutter/test/components/message/stream_message_text_test.dart
new file mode 100644
index 00000000..8d36ea33
--- /dev/null
+++ b/packages/stream_core_flutter/test/components/message/stream_message_text_test.dart
@@ -0,0 +1,88 @@
+import 'package:flutter_markdown_plus/flutter_markdown_plus.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
+import 'package:stream_core_flutter/chat.dart';
+
+MarkdownStyleSheet _pumpAndReadSheet(WidgetTester tester) {
+  return tester.widget<MarkdownBody>(find.byType(MarkdownBody)).styleSheet!;
+}
+
+Widget _withTheme(Widget child, {ThemeData? theme}) {
+  return MaterialApp(
+    theme: (theme ?? ThemeData()).copyWith(extensions: [StreamTheme()]),
+    home: Scaffold(body: child),
+  );
+}
+
+void main() {
+  group('StreamMessageText markdown style sheet', () {
+    // `MarkdownStyleSheet.fromTheme` takes Flutter's own `ThemeData`, which is
+    // an unrelated type to `material_ui`'s, so the widget bridges between them
+    // by hand. These assertions pin the fields that bridge has to carry —
+    // dropping one would silently fall back to a Material default.
+    testWidgets('derives heading styles from the ambient text theme', (tester) async {
+      const headline = TextStyle(fontSize: 33, fontWeight: FontWeight.w900);
+      const title = TextStyle(fontSize: 27);
+
+      await tester.pumpWidget(
+        _withTheme(
+          StreamMessageText('# Heading\n\nBody text'),
+          theme: ThemeData(
+            textTheme: const TextTheme(headlineSmall: headline, titleLarge: title),
+          ),
+        ),
+      );
+
+      final sheet = _pumpAndReadSheet(tester);
+      expect(sheet.h1?.fontSize, headline.fontSize);
+      expect(sheet.h1?.fontWeight, headline.fontWeight);
+      expect(sheet.h2?.fontSize, title.fontSize);
+    });
+
+    testWidgets('sizes inline code relative to the body style', (tester) async {
+      const body = TextStyle(fontSize: 20);
+
+      await tester.pumpWidget(
+        _withTheme(
+          StreamMessageText('Body with `code`'),
+          theme: ThemeData(textTheme: const TextTheme(bodyMedium: body)),
+        ),
+      );
+
+      // `fromTheme` derives code from bodyMedium at 85% of its size, so a
+      // bridge that dropped `textTheme` would land on Material's default 14.
+      expect(_pumpAndReadSheet(tester).code?.fontSize, body.fontSize! * 0.85);
+    });
+
+    testWidgets('takes the code block and table colors from the ambient theme', (tester) async {
+      const cardColor = Color(0xFFABCDEF);
+      const dividerColor = Color(0xFF123456);
+
+      await tester.pumpWidget(
+        _withTheme(
+          StreamMessageText('    code block'),
+          theme: ThemeData(cardColor: cardColor, dividerColor: dividerColor),
+        ),
+      );
+
+      final sheet = _pumpAndReadSheet(tester);
+      expect((sheet.codeblockDecoration! as BoxDecoration).color, cardColor);
+      expect(sheet.tableBorder?.top.color, dividerColor);
+    });
+
+    testWidgets('lets an explicit style sheet win over the derived one', (tester) async {
+      const override = TextStyle(fontSize: 42);
+
+      await tester.pumpWidget(
+        _withTheme(
+          StreamMessageText('# Heading', styleSheet: MarkdownStyleSheet(h1: override)),
+          theme: ThemeData(
+            textTheme: const TextTheme(headlineSmall: TextStyle(fontSize: 10)),
+          ),
+        ),
+      );
+
+      expect(_pumpAndReadSheet(tester).h1?.fontSize, override.fontSize);
+    });
+  });
+}
diff --git a/packages/stream_core_flutter/test/components/message_composer/attachment/file_attachment_semantics_test.dart b/packages/stream_core_flutter/test/components/message_composer/attachment/file_attachment_semantics_test.dart
index d4737eff..51b451f6 100644
--- a/packages/stream_core_flutter/test/components/message_composer/attachment/file_attachment_semantics_test.dart
+++ b/packages/stream_core_flutter/test/components/message_composer/attachment/file_attachment_semantics_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/message_composer/attachment/media_attachment_semantics_test.dart b/packages/stream_core_flutter/test/components/message_composer/attachment/media_attachment_semantics_test.dart
index c032f428..d8b0816a 100644
--- a/packages/stream_core_flutter/test/components/message_composer/attachment/media_attachment_semantics_test.dart
+++ b/packages/stream_core_flutter/test/components/message_composer/attachment/media_attachment_semantics_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_link_preview_golden_test.dart b/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_link_preview_golden_test.dart
index 7bc6bd08..bd550a4a 100644
--- a/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_link_preview_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_link_preview_golden_test.dart
@@ -3,10 +3,12 @@
 import 'dart:typed_data';
 
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
+import '../../utils/material_localizations.dart';
+
 void main() {
   group('MessageComposerAttachmentLinkPreview Golden Tests', () {
     goldenTest(
@@ -211,17 +213,19 @@ Widget _buildLinkPreviewInTheme(
   Brightness brightness = Brightness.light,
 }) {
   final streamTheme = StreamTheme(brightness: brightness);
-  return Theme(
-    data: ThemeData(
-      brightness: brightness,
-      extensions: [streamTheme],
-    ),
-    child: Builder(
-      builder: (context) => Material(
-        color: StreamTheme.of(context).colorScheme.backgroundApp,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: linkPreview,
+  return withMaterialLocalizations(
+    child: Theme(
+      data: ThemeData(
+        brightness: brightness,
+        extensions: [streamTheme],
+      ),
+      child: Builder(
+        builder: (context) => Material(
+          color: StreamTheme.of(context).colorScheme.backgroundApp,
+          child: Padding(
+            padding: const EdgeInsets.all(8),
+            child: linkPreview,
+          ),
         ),
       ),
     ),
diff --git a/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_reply_golden_test.dart b/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_reply_golden_test.dart
index 97b49768..0bc1a68a 100644
--- a/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_reply_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/message_composer/message_composer_attachment_reply_golden_test.dart
@@ -1,10 +1,12 @@
 // ignore_for_file: avoid_redundant_argument_values
 
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
+import '../../utils/material_localizations.dart';
+
 void main() {
   group('MessageComposerAttachmentReply Golden Tests', () {
     goldenTest(
@@ -84,17 +86,19 @@ Widget _buildReplyInTheme(
   Brightness brightness = Brightness.light,
 }) {
   final streamTheme = StreamTheme(brightness: brightness);
-  return Theme(
-    data: ThemeData(
-      brightness: brightness,
-      extensions: [streamTheme],
-    ),
-    child: Builder(
-      builder: (context) => Material(
-        color: StreamTheme.of(context).colorScheme.backgroundApp,
-        child: Padding(
-          padding: const EdgeInsets.all(8),
-          child: reply,
+  return withMaterialLocalizations(
+    child: Theme(
+      data: ThemeData(
+        brightness: brightness,
+        extensions: [streamTheme],
+      ),
+      child: Builder(
+        builder: (context) => Material(
+          color: StreamTheme.of(context).colorScheme.backgroundApp,
+          child: Padding(
+            padding: const EdgeInsets.all(8),
+            child: reply,
+          ),
         ),
       ),
     ),
diff --git a/packages/stream_core_flutter/test/components/message_layout/stream_message_layout_test.dart b/packages/stream_core_flutter/test/components/message_layout/stream_message_layout_test.dart
index d8c934e2..25833ea8 100644
--- a/packages/stream_core_flutter/test/components/message_layout/stream_message_layout_test.dart
+++ b/packages/stream_core_flutter/test/components/message_layout/stream_message_layout_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/reaction/stream_reactions_test.dart b/packages/stream_core_flutter/test/components/reaction/stream_reactions_test.dart
index 2a7694d9..d79cdd74 100644
--- a/packages/stream_core_flutter/test/components/reaction/stream_reactions_test.dart
+++ b/packages/stream_core_flutter/test/components/reaction/stream_reactions_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/chat.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/scaffold/stream_scaffold_test.dart b/packages/stream_core_flutter/test/components/scaffold/stream_scaffold_test.dart
index 269a064f..6524a2e2 100644
--- a/packages/stream_core_flutter/test/components/scaffold/stream_scaffold_test.dart
+++ b/packages/stream_core_flutter/test/components/scaffold/stream_scaffold_test.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/gestures.dart' show DragStartBehavior;
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child, {StreamSurfaceStyle surfaceStyle = StreamSurfaceStyle.regular}) {
diff --git a/packages/stream_core_flutter/test/components/sheet/stream_sheet_test.dart b/packages/stream_core_flutter/test/components/sheet/stream_sheet_test.dart
index 52c0cdd2..8d1bb9f1 100644
--- a/packages/stream_core_flutter/test/components/sheet/stream_sheet_test.dart
+++ b/packages/stream_core_flutter/test/components/sheet/stream_sheet_test.dart
@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child, {TargetPlatform? platform}) {
diff --git a/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_golden_test.dart b/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_golden_test.dart
index 36e9030b..e0a6a571 100644
--- a/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_test.dart b/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_test.dart
index 083d50dd..b990aff8 100644
--- a/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_test.dart
+++ b/packages/stream_core_flutter/test/components/snackbar/stream_snackbar_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_focus_isolation_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_focus_isolation_test.dart
index 0a566983..b92a9f81 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_focus_isolation_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_focus_isolation_test.dart
@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter/semantics.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 // Each slot of [StreamAppBar] must produce its own focus stop. A raw
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_golden_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_golden_test.dart
index 6479826c..76dfef8a 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 const _kBarWidth = 390.0;
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_test.dart
index 6f782354..f8c5d64f 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_app_bar_test.dart
@@ -1,6 +1,6 @@
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_golden_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_golden_test.dart
index 5c3191e6..fcd416c5 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 const _kBarWidth = 390.0;
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_test.dart
index 6ad54595..ce94bd91 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_app_bar_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_golden_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_golden_test.dart
index 635f7bb6..f0798c19 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_golden_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_golden_test.dart
@@ -1,8 +1,10 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
+import '../../utils/material_localizations.dart';
+
 const _kBarWidth = 390.0;
 
 const _items = [
@@ -86,15 +88,17 @@ Widget _buildNavBarInTheme(
   Brightness brightness = Brightness.light,
 }) {
   final streamTheme = StreamTheme(brightness: brightness);
-  return Theme(
-    data: ThemeData(
-      brightness: brightness,
-      extensions: [streamTheme],
-    ),
-    child: Builder(
-      builder: (context) => Material(
-        color: StreamTheme.of(context).colorScheme.backgroundApp,
-        child: SizedBox(width: _kBarWidth, child: navBar),
+  return withMaterialLocalizations(
+    child: Theme(
+      data: ThemeData(
+        brightness: brightness,
+        extensions: [streamTheme],
+      ),
+      child: Builder(
+        builder: (context) => Material(
+          color: StreamTheme.of(context).colorScheme.backgroundApp,
+          child: SizedBox(width: _kBarWidth, child: navBar),
+        ),
       ),
     ),
   );
@@ -107,38 +111,40 @@ Widget _buildFloatingNavBarInTheme(
   Brightness brightness = Brightness.light,
 }) {
   final streamTheme = StreamTheme(brightness: brightness);
-  return Theme(
-    data: ThemeData(
-      brightness: brightness,
-      extensions: [streamTheme],
-    ),
-    child: Builder(
-      builder: (context) {
-        final colorScheme = StreamTheme.of(context).colorScheme;
-        return SizedBox(
-          width: _kBarWidth,
-          height: kStreamToolbarHeight * 3,
-          child: Stack(
-            children: [
-              Positioned.fill(
-                child: DecoratedBox(
-                  decoration: BoxDecoration(
-                    gradient: LinearGradient(
-                      begin: Alignment.topCenter,
-                      end: Alignment.bottomCenter,
-                      colors: [
-                        colorScheme.backgroundApp,
-                        colorScheme.accentPrimary.withAlpha(0x40),
-                      ],
+  return withMaterialLocalizations(
+    child: Theme(
+      data: ThemeData(
+        brightness: brightness,
+        extensions: [streamTheme],
+      ),
+      child: Builder(
+        builder: (context) {
+          final colorScheme = StreamTheme.of(context).colorScheme;
+          return SizedBox(
+            width: _kBarWidth,
+            height: kStreamToolbarHeight * 3,
+            child: Stack(
+              children: [
+                Positioned.fill(
+                  child: DecoratedBox(
+                    decoration: BoxDecoration(
+                      gradient: LinearGradient(
+                        begin: Alignment.topCenter,
+                        end: Alignment.bottomCenter,
+                        colors: [
+                          colorScheme.backgroundApp,
+                          colorScheme.accentPrimary.withAlpha(0x40),
+                        ],
+                      ),
                     ),
                   ),
                 ),
-              ),
-              Positioned(bottom: 0, left: 0, right: 0, child: navBar),
-            ],
-          ),
-        );
-      },
+                Positioned(bottom: 0, left: 0, right: 0, child: navBar),
+              ],
+            ),
+          );
+        },
+      ),
     ),
   );
 }
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_test.dart
index e80159b6..9920f3e9 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_bottom_nav_bar_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 const _items = [
@@ -100,7 +100,12 @@ void main() {
         ),
       );
 
-      expect(find.byTooltip('Go home'), findsOneWidget);
+      // Not `find.byTooltip`: that finder is bound to Flutter's own `Tooltip`,
+      // an unrelated type to the `material_ui` one the bar builds.
+      expect(
+        find.byWidgetPredicate((widget) => widget is Tooltip && widget.message == 'Go home'),
+        findsOneWidget,
+      );
     });
 
     testWidgets('shows no tooltip for an empty tooltip string', (tester) async {
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_sheet_header_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_sheet_header_test.dart
index 5dc282fb..4465e9a6 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_sheet_header_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_sheet_header_test.dart
@@ -1,8 +1,8 @@
 import 'dart:async';
 
 import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child) {
diff --git a/packages/stream_core_flutter/test/components/toolbar/stream_toolbar_button_test.dart b/packages/stream_core_flutter/test/components/toolbar/stream_toolbar_button_test.dart
index bab2c088..61cea8d8 100644
--- a/packages/stream_core_flutter/test/components/toolbar/stream_toolbar_button_test.dart
+++ b/packages/stream_core_flutter/test/components/toolbar/stream_toolbar_button_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 Widget _withStreamTheme(Widget child, {StreamSurfaceStyle surfaceStyle = StreamSurfaceStyle.regular}) {
diff --git a/packages/stream_core_flutter/test/theme/stream_theme_color_generation_golden_test.dart b/packages/stream_core_flutter/test/theme/stream_theme_color_generation_golden_test.dart
index 393c64e4..bf44fba5 100644
--- a/packages/stream_core_flutter/test/theme/stream_theme_color_generation_golden_test.dart
+++ b/packages/stream_core_flutter/test/theme/stream_theme_color_generation_golden_test.dart
@@ -1,6 +1,6 @@
 import 'package:alchemist/alchemist.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// The shades every generated [StreamColorSwatch] exposes (see
diff --git a/packages/stream_core_flutter/test/theme/stream_theme_color_generation_test.dart b/packages/stream_core_flutter/test/theme/stream_theme_color_generation_test.dart
index e9100e38..8b6c7191 100644
--- a/packages/stream_core_flutter/test/theme/stream_theme_color_generation_test.dart
+++ b/packages/stream_core_flutter/test/theme/stream_theme_color_generation_test.dart
@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:material_color_utilities/material_color_utilities.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 /// Every shade a generated [StreamColorSwatch] exposes.
diff --git a/packages/stream_core_flutter/test/theme/stream_theme_test.dart b/packages/stream_core_flutter/test/theme/stream_theme_test.dart
index c4f8b557..5a9f93b8 100644
--- a/packages/stream_core_flutter/test/theme/stream_theme_test.dart
+++ b/packages/stream_core_flutter/test/theme/stream_theme_test.dart
@@ -1,5 +1,5 @@
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_core_flutter/core.dart';
 
 void main() {
diff --git a/packages/stream_core_flutter/test/utils/material_localizations.dart b/packages/stream_core_flutter/test/utils/material_localizations.dart
new file mode 100644
index 00000000..27ac23a7
--- /dev/null
+++ b/packages/stream_core_flutter/test/utils/material_localizations.dart
@@ -0,0 +1,23 @@
+import 'package:material_ui/material_ui.dart';
+
+/// Provides `material_ui`'s [MaterialLocalizations] to [child].
+///
+/// Alchemist scaffolds golden tests with Flutter's own `MaterialApp`, whose
+/// `MaterialLocalizations` are an unrelated type to `material_ui`'s. A
+/// component that reads them — through a `Tooltip`, a semantics label, or
+/// `MaterialLocalizations.of` directly — throws `No MaterialLocalizations
+/// found` and renders an error box instead. Widget tests do not need this:
+/// they wrap in `material_ui`'s `MaterialApp`, which supplies them.
+//
+// TODO(material-ui): drop once alchemist supports material_ui.
+// https://linear.app/stream/issue/flu-702
+Widget withMaterialLocalizations({required Widget child}) {
+  return Localizations(
+    locale: const Locale('en', 'US'),
+    delegates: const [
+      DefaultMaterialLocalizations.delegate,
+      DefaultWidgetsLocalizations.delegate,
+    ],
+    child: child,
+  );
+}
diff --git a/packages/stream_thumbnail/CHANGELOG.md b/packages/stream_thumbnail/CHANGELOG.md
index 60732342..6f01f714 100644
--- a/packages/stream_thumbnail/CHANGELOG.md
+++ b/packages/stream_thumbnail/CHANGELOG.md
@@ -1,3 +1,9 @@
+## Upcoming
+
+### 🔄 Changed
+
+- Raised the minimum Flutter version to `>=3.44.0` and the Dart SDK to `^3.12.0`.
+
 ## 0.1.0
 
 * Initial release.
diff --git a/packages/stream_thumbnail/example/lib/main.dart b/packages/stream_thumbnail/example/lib/main.dart
index dae19066..0ffc1046 100644
--- a/packages/stream_thumbnail/example/lib/main.dart
+++ b/packages/stream_thumbnail/example/lib/main.dart
@@ -1,6 +1,6 @@
 import 'dart:typed_data';
 
-import 'package:flutter/material.dart';
+import 'package:material_ui/material_ui.dart';
 import 'package:stream_thumbnail/stream_thumbnail.dart';
 
 void main() => runApp(const ExampleApp());
diff --git a/packages/stream_thumbnail/example/linux/flutter/generated_plugin_registrant.cc b/packages/stream_thumbnail/example/linux/flutter/generated_plugin_registrant.cc
new file mode 100644
index 00000000..e71a16d2
--- /dev/null
+++ b/packages/stream_thumbnail/example/linux/flutter/generated_plugin_registrant.cc
@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+}
diff --git a/packages/stream_thumbnail/example/linux/flutter/generated_plugin_registrant.h b/packages/stream_thumbnail/example/linux/flutter/generated_plugin_registrant.h
new file mode 100644
index 00000000..e0f0a47b
--- /dev/null
+++ b/packages/stream_thumbnail/example/linux/flutter/generated_plugin_registrant.h
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
diff --git a/packages/stream_thumbnail/example/linux/flutter/generated_plugins.cmake b/packages/stream_thumbnail/example/linux/flutter/generated_plugins.cmake
new file mode 100644
index 00000000..2e1de87a
--- /dev/null
+++ b/packages/stream_thumbnail/example/linux/flutter/generated_plugins.cmake
@@ -0,0 +1,23 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)
diff --git a/packages/stream_thumbnail/example/pubspec.yaml b/packages/stream_thumbnail/example/pubspec.yaml
index e0e6f9cf..4b314085 100644
--- a/packages/stream_thumbnail/example/pubspec.yaml
+++ b/packages/stream_thumbnail/example/pubspec.yaml
@@ -4,12 +4,13 @@ publish_to: 'none'
 version: 1.0.0+1
 
 environment:
-  sdk: ^3.10.0
-  flutter: ">=3.38.1"
+  sdk: ^3.12.0
+  flutter: ">=3.44.0"
 
 dependencies:
   flutter:
     sdk: flutter
+  material_ui: ^1.0.0
   stream_thumbnail: ^0.1.0
 
 dev_dependencies:
diff --git a/packages/stream_thumbnail/pubspec.yaml b/packages/stream_thumbnail/pubspec.yaml
index 2cd583de..b2183f9c 100644
--- a/packages/stream_thumbnail/pubspec.yaml
+++ b/packages/stream_thumbnail/pubspec.yaml
@@ -5,8 +5,8 @@ homepage: https://github.com/GetStream/stream-core-flutter
 repository: https://github.com/GetStream/stream-core-flutter
 
 environment:
-  sdk: ^3.10.0
-  flutter: ">=3.38.1"
+  sdk: ^3.12.0
+  flutter: ">=3.44.0"
 
 dependencies:
   cross_file: ^0.3.4+2
diff --git a/pubspec.lock b/pubspec.lock
index 1843812b..00115924 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -458,4 +458,4 @@ packages:
     source: hosted
     version: "2.2.3"
 sdks:
-  dart: ">=3.10.0 <4.0.0"
+  dart: ">=3.12.0 <4.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 6e9eabda..098769b0 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,7 +1,7 @@
 name: stream_core_flutter_workspace
 
 environment:
-  sdk: ^3.10.0
+  sdk: ^3.12.0
 
 dev_dependencies:
   code_builder: ^4.10.1