diff --git a/openspec/changes/align-shared-artifact-inventory-ui/.openspec.yaml b/openspec/changes/align-shared-artifact-inventory-ui/.openspec.yaml
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+schema: spec-driven
+created: 2026-08-08
diff --git a/openspec/changes/align-shared-artifact-inventory-ui/design.md b/openspec/changes/align-shared-artifact-inventory-ui/design.md
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+## Context
+
+See `proposal.md` for motivation. Current baseline after `add-complete-artifact-inventory`:
+
+- Host can enrich `getChangeDetails` with `artifacts` + `otherArtifacts` and open/reveal works.
+- Webview Change Detail still centers a fixed `WorkflowStepIndicator` and a compact Other chip strip.
+- Dashboard has no selected-change Complete Artifact Inventory; cards only show coarse badges.
+
+Design references: `docs/new-design/OpenSpec_UI_ChangeDetail_HighFidelity.png`, `docs/new-design-append-2/OpenSpec_UI_v4_ChangesWorkspace.png`, PRD v4 §9.4 / §10 / §22.
+
+## Goals / Non-Goals
+
+**Goals:**
+
+- One Host-built `ArtifactInventory` (`defined` + `other`) per change+scope, shared by Dashboard selected panel and Change Detail.
+- Reusable webview Inventory / Plan Readiness components (same data props; layout variants allowed).
+- Change Detail: remove fixed stepper as primary readiness UI; add Plan Readiness cards, shared Inventory Other section, Execution Progress, richer header context.
+- Dashboard: selected-change Complete Artifact Inventory with Schema cards + Other section.
+
+**Non-Goals:**
+
+- Full Store Add Operation modal / Store Quick View IA (keep existing compact store controls).
+- Workset Workspace redesign.
+- Full Rendered|Source dual-mode editor chrome for every artifact.
+- Treating apply/verify/archive as Schema inventory artifacts (PRD text wins over mock boxes).
+- Replacing lifecycle filtering/pagination work (`add-change-lifecycle-filtering-and-pagination`); integrate with existing list, don’t rewrite status model here.
+
+## Decisions
+
+### D1: Canonical inventory type lives in shared module
+
+Introduce `ArtifactInventory` / `ArtifactInventoryItem` in a shared types module (aligned with PRD §22), built once in Extension Host (extend/replace ad-hoc `otherArtifacts` attachment in `getChangeDetails`).
+
+Dashboard and Detail both receive this structure via messages (`changeDetails` / dashboard selected-change payload). Webview MUST NOT re-diff the filesystem.
+
+**Alternative considered:** Let each surface call different APIs and “mostly agree” — rejected; user explicitly requires one inventory.
+
+### D2: Plan Readiness cards are a presentation of `defined`
+
+Plan Readiness is not a second data source. It is a card layout over `inventory.defined` (status, counts, deps, actions). Content tabs remain for reading markdown/tasks.
+
+```
+Host: buildArtifactInventory(change, scope)
+        │
+        ├─► Dashboard selected panel ── ArtifactInventoryView(variant=workspace)
+        └─► Change Detail ──────────── PlanReadiness(defined)
+                                       ArtifactInventoryView(variant=detail)
+                                       ExecutionProgress(tasks)
+                                       Content tabs(defined ids + other entry)
+```
+
+### D3: Remove fixed stepper from Detail primary chrome
+
+`WorkflowStepIndicator` with hardcoded Proposal→Archive MUST leave Change Detail primary layout. Keep Apply/Verify/Archive as ActionBar / VerifyArchive panel / workflow launch actions.
+
+**Alternative:** Restyle stepper to look like cards — rejected; PRD forbids fixed phase UI.
+
+### D4: Dashboard selected panel placement
+
+MVP: when a change card is selected (or when Detail isn’t open, on explicit select), show inventory in an expandable section under the changes list / in the dashboard main column without requiring opening the editor Detail panel first. Opening Detail still uses the same inventory fetch/cache key `(scopeId, changeName)`.
+
+If current Dashboard has no true “selected change” state beyond navigation into Detail, add lightweight selection: click selects + shows inventory; double-click or “Open” opens Detail (preserve existing open behavior with clear affordance). Prefer: single click opens Detail today — add an inventory preview region that loads for the last-focused/opened change from the list (including when Detail is open), keyed by selection state already used by the UI if present.
+
+**Concrete MVP choice:** Introduce `selectedChangeName` in Dashboard; clicking a card sets selection and requests inventory; a dedicated “Open detail” control / card title action opens Change Detail. If that is too breaking, fall back to: inventory panel shows for the change currently open in Detail (synced), AND for hover/focus preview — but primary acceptance is “Workspace shows inventory without relying on a different Other list.” Prefer selection state.
+
+### D5: Visual system
+
+Follow existing Tailwind + VS Code CSS variables (no new design system). Schema cards: compact colored tiles with name + count + status. Other: secondary section title `Other Artifacts · Not defined in schema` / `其他工件 (未定义)` + chips/cards with counts + More (Open / Reveal / Copy path).
+
+### D6: Compatibility with prior inventory change
+
+Keep `buildOtherArtifacts` / `openAndRevealPath`; wrap them inside `buildArtifactInventory`. Retain message types where possible; evolve payloads to include `inventory: { defined, other }` and deprecate parallel-only `otherArtifacts` once both surfaces migrate (temporary dual-field ok during migration).
+
+## Risks / Trade-offs
+
+- [Dashboard click behavior change] → Mitigate with explicit Open affordance + preserve keyboard/accessibility; document in tasks.
+- [Status mapping incomplete when CLI status fails] → Reuse filesystem fallback statuses; show Unknown rather than omit.
+- [Visual scope creep into Store Quick View] → Hard Non-Goal; reject in review if PRs expand there.
+- [Duplicate fetches] → Cache inventory on Host per `(scopeId, changeName)` short TTL / invalidate with existing file watcher.
+
+## Migration Plan
+
+1. Ship shared types + Host builder behind existing `getChangeDetails`.
+2. Switch Change Detail to Plan Readiness + shared Other section; remove stepper.
+3. Add Dashboard selected inventory panel consuming same message/builder.
+4. Remove temporary dual fields after both surfaces read `inventory` only.
+5. Rollback: revert webview layout; Host inventory field is additive.
+
+## Open Questions
+
+- None that block specs/tasks: Dashboard selection UX default locked in D4 (selectedChangeName + inventory panel; Open detail is explicit).
diff --git a/openspec/changes/align-shared-artifact-inventory-ui/proposal.md b/openspec/changes/align-shared-artifact-inventory-ui/proposal.md
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+## Why
+
+`add-complete-artifact-inventory` 已经把 Schema 动态 Tab、Other Artifacts 扫描和 Reveal+Open 接到 Change Detail，但视觉与信息架构仍停留在旧页：固定 `Proposal → … → Archive` 步进条、无 Plan Readiness 卡片、Other Artifacts 只是一条紧凑 chip，且 Dashboard / Changes Workspace 完全看不到同一份 Inventory。对照 v2 Change Detail 高保真与 v4 Changes Workspace，用户感知是「功能有了，设计稿完全对不上」。现在需要把 **Changes Workspace（Dashboard 选中 Change）** 与 **Change Detail** 一起对齐设计，并强制 **共用同一份 Artifact Inventory 数据源**。
+
+## What Changes
+
+- 抽出共享的 `ArtifactInventory` 数据模型与构建入口（`defined` / `other`），供 Changes Workspace 与 Change Detail 共同消费；禁止两套各自拼装的列表。
+- **Changes Workspace（Dashboard 选中 Change 面板）**：按 v4 §9.4 展示 Complete Artifact Inventory——Schema Artifact 卡片行（类型、文件/任务数、状态）+ `Other Artifacts · Not defined in schema` 分区；主点击 Reveal+Open。
+- **Change Detail**：对齐 v2/v4 Detail 设计——移除固定生命周期 Stepper；用 **Plan Readiness** Artifact Cards（Done/Ready/Blocked/Missing/Error、文件数、依赖、Open/Reveal）；同一 Inventory 的 Schema + Other 分区；独立 **Execution Progress** 区；Header 补充 Writable Root / Schema / 任务进度等关键上下文。
+- Artifact Content View：保留 Schema 动态 Tab；Other 作为内容分组/入口与 Inventory 联动，不再只是永久贴在 Tab 下的无名 chip 条。
+- 升级 Other Artifacts 文案与布局至设计稿语义（「Not defined in schema / 未定义」）；条目支持 Open / Reveal / Copy path（More 或等价入口）。
+
+## Capabilities
+
+### New Capabilities
+
+- `artifact-inventory`: 定义共享 Artifact Inventory 的数据契约、Schema vs Other 分区规则，以及 Changes Workspace 与 Change Detail 必须共用同一数据源的行为要求。
+
+### Modified Capabilities
+
+- `artifact-viewing`: Change Detail 从「动态 Tab + 紧凑 Other strip」升级为 Plan Readiness 卡片 + 共享 Inventory 分区 + 去掉固定 Stepper；内容区与 Inventory 联动。
+- `dashboard`: Changes Workspace / Dashboard 在选中 Change 时展示与 Detail 同源的 Complete Artifact Inventory（Schema 卡片 + Other 分区），而不只是列表卡片上的简单徽标。
+
+## Impact
+
+- Extension Host：在现有 `buildOtherArtifacts` / `getChangeDetails` 之上收敛为统一的 `ArtifactInventory` 构建与消息载荷；Dashboard 与 Detail 的 webview 消息共用该结构。
+- Webview：新增可复用的 Inventory / Plan Readiness 组件；改造 `ChangeDetail.tsx` 与 Dashboard 选中态面板；移除或降级 `WorkflowStepIndicator` 固定阶段条在 Detail 上的主导地位。
+- Types / i18n：共享 Inventory 类型；中英文「Other Artifacts · Not defined in schema / 其他工件 (未定义)」等文案。
+- 依赖前序 change：`add-complete-artifact-inventory` 的扫描与 open/reveal 能力作为基础，本 change 做 UI 对齐与数据共享。
+- **不在本 change**：Store Add Operation / Store Quick View 完整表单、Workset Workspace、Rendered|Source 全套内容编辑器能力、自定义 Schema 的通用多文件子选择器泛化。
diff --git a/openspec/changes/align-shared-artifact-inventory-ui/specs/artifact-inventory/spec.md b/openspec/changes/align-shared-artifact-inventory-ui/specs/artifact-inventory/spec.md
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+## Purpose
+
+Defines the shared Artifact Inventory contract that both Changes Workspace and Change Detail MUST consume so Schema-defined and undeclared (Other) artifacts stay consistent across surfaces.
+
+## ADDED Requirements
+
+### Requirement: Shared Artifact Inventory Contract
+
+The system SHALL expose a single Artifact Inventory per change that contains:
+
+1. `defined`: Schema-declared artifacts in Schema order
+2. `other`: Change-directory entries that exist on disk but are not declared by the current Schema
+
+Both Changes Workspace and Change Detail MUST render from this same inventory payload for a given change identity (name + scope/root). The system MUST NOT build divergent Schema or Other lists per surface.
+
+#### Scenario: Same inventory on workspace and detail
+
+- **WHEN** the user selects a change in Changes Workspace and later opens the same change in Change Detail under the same scope
+- **THEN** both surfaces show the same Schema artifact keys/order and the same Other artifact entries (paths and file counts)
+
+#### Scenario: Schema and Other partitions are distinct
+
+- **WHEN** an inventory is built for a change that has both Schema artifacts and undeclared files
+- **THEN** Schema items appear only under `defined` and undeclared items appear only under `other` (no silent reclassification)
+
+### Requirement: Schema Inventory Item Fields
+
+Each Schema inventory item SHALL include enough information for Plan Readiness / inventory cards:
+
+- stable key / id
+- display name
+- source marked as schema-defined
+- status among Done / Ready / Blocked / Missing / Error (or an equivalent mapped set)
+- file count (0 when missing)
+- optional dependency ids
+- optional updated time when known
+
+Missing Schema-declared artifacts (declared but file not created) SHALL still appear as inventory items with Missing or Ready status, not be omitted.
+
+#### Scenario: Missing schema artifact remains visible
+
+- **WHEN** Schema declares an artifact whose output file does not yet exist
+- **THEN** the inventory still includes that artifact marked Missing or Ready (not hidden)
+
+#### Scenario: Schema order is preserved
+
+- **WHEN** Schema returns artifacts in a specific order
+- **THEN** `defined` preserves that order for consumers
+
+### Requirement: Other Inventory Item Fields
+
+Each Other inventory item SHALL include:
+
+- stable key / id
+- relative path
+- whether it is a directory
+- file count (single-level for directories; 1 for files)
+- source marked as filesystem / not schema-defined
+
+Undeclared entries MUST NOT be hidden, discarded, or auto-merged into a Schema artifact type.
+
+#### Scenario: Undeclared directory is listed with count
+
+- **WHEN** the change directory contains `task-details/` with six files and Schema does not declare it
+- **THEN** `other` includes that directory with file count 6
+
+#### Scenario: Empty other partition
+
+- **WHEN** every top-level change entry is covered by Schema known paths
+- **THEN** `other` is empty and consumers MAY hide the Other section
diff --git a/openspec/changes/align-shared-artifact-inventory-ui/specs/artifact-viewing/spec.md b/openspec/changes/align-shared-artifact-inventory-ui/specs/artifact-viewing/spec.md
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+## MODIFIED Requirements
+
+### Requirement: Artifact List Display
+
+The Change Detail view SHALL present planning readiness and complete artifact inventory from the shared Artifact Inventory (see `artifact-inventory`), not from a hardcoded four-tab-only model or a permanent fixed lifecycle stepper.
+
+Change Detail MUST:
+
+1. Show **Plan Readiness** as Schema artifact cards driven by inventory `defined` (status, file count, optional deps, Open/Reveal)
+2. Show **Complete Artifact Inventory** partitions for Schema and Other using the same inventory payload
+3. Keep content tabs dynamically generated from Schema artifact ids
+4. NOT use an irreversible fixed stepper of `Proposal → Specs → Design → Tasks → Apply → Verify → Archive` as the primary readiness UI
+
+Apply / Verify / Archive remain actions (or dedicated workflow panels), not Schema artifacts.
+
+#### Scenario: Show available artifacts
+
+- **GIVEN** a change with multiple Schema artifacts
+- **WHEN** the user opens change details
+- **THEN** all Schema artifacts MUST be shown as Plan Readiness cards and/or inventory items and content tabs
+- **AND** the set and order of artifacts MUST come from the change's current Schema instead of a hardcoded list
+- **AND** Schema-defined artifacts that have not been created yet MUST remain visible as Missing/Not created
+
+#### Scenario: Show available artifacts as readiness cards
+
+- **WHEN** a user opens Change Detail for a change with Schema artifacts
+- **THEN** Plan Readiness shows one card per Schema artifact with status and Open/Reveal affordance
+
+#### Scenario: Fixed lifecycle stepper is not primary readiness UI
+
+- **WHEN** a user opens Change Detail
+- **THEN** the primary readiness presentation is Plan Readiness cards / inventory, not a fixed Proposal→…→Archive phase stepper
+
+#### Scenario: Artifact status indication
+
+- **WHEN** Schema artifacts have Done / Ready / Blocked / Missing / Error statuses
+- **THEN** Plan Readiness cards reflect those statuses visually
+
+#### Scenario: Other artifacts section on detail
+
+- **WHEN** inventory `other` is non-empty
+- **THEN** Change Detail shows an Other Artifacts section labeled to indicate items are not defined in schema
+
+#### Scenario: Other artifacts section hidden when empty
+
+- **WHEN** inventory `other` is empty
+- **THEN** Change Detail does not render an empty Other Artifacts section
+
+### Requirement: Artifact Actions
+
+The system SHALL provide artifact actions consistent with Reveal-first inventory behavior:
+
+- Open in editor
+- Reveal in Explorer
+- Copy path (for existing paths)
+- Refresh artifact content
+
+Primary click on an existing Schema or Other inventory card MUST Reveal + Open (single file) or Reveal directory and focus the most recently updated file (multi-file). Missing Schema artifacts MUST NOT attempt reveal; they offer continue/create planning actions instead.
+
+#### Scenario: Open in editor
+
+- **WHEN** user chooses Open on an existing single-file artifact
+- **THEN** the file opens in the VS Code editor and is revealed in Explorer
+
+#### Scenario: Copy file path
+
+- **WHEN** user chooses Copy path for an existing artifact path
+- **THEN** the absolute path is copied to the clipboard
+
+#### Scenario: Refresh artifact
+
+- **WHEN** user refreshes while viewing an artifact
+- **THEN** content reloads from disk without leaving Change Detail
+
+#### Scenario: Reveal multi-file artifact
+
+- **WHEN** user activates a directory artifact (Schema or Other)
+- **THEN** Explorer reveals/expands the directory and focuses the most recently updated file when one exists
+
+#### Scenario: Missing artifact does not attempt reveal
+
+- **WHEN** user activates a Missing Schema artifact
+- **THEN** the system does not call reveal for a non-existent path and instead offers continue/create planning
+
+## ADDED Requirements
+
+### Requirement: Change Detail Context Header
+
+Change Detail Header SHALL surface enough context to answer “where is this change?” including at least: change name, writable root label/path when known, schema id when known, and task progress when tasks exist. Linked store summary MAY appear when a store is in scope.
+
+#### Scenario: Header shows root and schema
+
+- **WHEN** a scoped change is opened in Change Detail
+- **THEN** the header shows the change name plus writable root and schema information when available
+
+### Requirement: Execution Progress Panel
+
+Change Detail SHALL show Execution Progress separately from Plan Readiness, including tasks completed/total when task data exists. Implementation/archive workflow controls MAY live adjacent but MUST NOT replace Plan Readiness cards.
+
+#### Scenario: Execution progress shows task counts
+
+- **WHEN** a change has tasks with a known completed/total count
+- **THEN** Execution Progress displays that progress separately from Plan Readiness
diff --git a/openspec/changes/align-shared-artifact-inventory-ui/specs/dashboard/spec.md b/openspec/changes/align-shared-artifact-inventory-ui/specs/dashboard/spec.md
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+## ADDED Requirements
+
+### Requirement: Selected Change Complete Artifact Inventory
+
+When a change is selected in the Changes Workspace (Dashboard change list / selected-change panel), the system SHALL display Complete Artifact Inventory for that change using the **same shared Artifact Inventory payload** consumed by Change Detail.
+
+The inventory MUST include:
+
+1. Schema-defined artifact cards (Schema order; file/task counts and status when available)
+2. An Other Artifacts section titled to indicate items are not defined in schema, listing undeclared files/directories with counts
+
+Primary card click MUST Reveal + Open existing paths; Missing Schema cards MUST NOT reveal.
+
+#### Scenario: Selected change shows schema inventory cards
+
+- **WHEN** the user selects a change that has Schema artifacts
+- **THEN** the Changes Workspace selected panel shows Schema inventory cards for those artifacts
+
+#### Scenario: Selected change shows other artifacts
+
+- **WHEN** the selected change directory contains undeclared entries such as `task-details/`
+- **THEN** the selected panel lists them under Other Artifacts with file counts
+
+#### Scenario: Workspace and detail stay consistent
+
+- **WHEN** the user opens Change Detail for the currently selected change without changing scope
+- **THEN** Detail inventory Schema keys and Other entries match what the Workspace selected panel showed
+
+#### Scenario: No selection hides inventory panel
+
+- **WHEN** no change is selected in Changes Workspace
+- **THEN** the Complete Artifact Inventory selected panel is not shown as if it belonged to another change
diff --git a/openspec/changes/align-shared-artifact-inventory-ui/tasks.md b/openspec/changes/align-shared-artifact-inventory-ui/tasks.md
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+## 1. Shared Inventory 数据契约与 Host 构建
+
+- [ ] 1.1 在 shared 类型中新增 `ArtifactInventory` / `ArtifactInventoryItem`（对齐 design D1 / PRD §22 字段：key、displayName、source、schemaDefined、status、paths、fileCount、dependencies、updatedAt）
+- [ ] 1.2 实现 `buildArtifactInventory(changeDir, schemaArtifacts, changeName)`：`defined` 来自 Schema/fallback artifacts，`other` 复用现有 `buildOtherArtifacts`
+- [ ] 1.3 在 `DataManager.getChangeDetails`（及必要的 Dashboard 拉取路径）返回统一 `inventory`；迁移期可同时保留 `otherArtifacts` 兼容字段
+- [ ] 1.4 为 `buildArtifactInventory` 与 getChangeDetails  enrichment 编写单元测试（Schema+Other、Missing 仍出现、Workspace/Detail 同 payload 形状）
+
+## 2. 可复用 Webview Inventory / Plan Readiness 组件
+
+- [ ] 2.1 新增 `ArtifactInventoryView`：Schema 卡片行 + `Other Artifacts · Not defined in schema` / `其他工件 (未定义)` 分区；空 Other 不渲染
+- [ ] 2.2 新增 `PlanReadinessCards`：基于 `inventory.defined` 展示状态、文件数、依赖摘要、Open/Reveal 入口
+- [ ] 2.3 统一卡片主点击与 More 菜单动作：Open / Reveal / Copy path；Missing 走 continue/create，不 reveal
+- [ ] 2.4 为上述组件补充渲染/交互测试（空 Other、目录计数文案、Missing 不发 reveal）
+
+## 3. Change Detail 对齐设计稿
+
+- [ ] 3.1 从 Change Detail 主布局移除固定 `WorkflowStepIndicator`（Proposal→Archive）作为 readiness 主导航；保留 ActionBar / VerifyArchive 等动作入口
+- [ ] 3.2 接入 Plan Readiness + 共享 `ArtifactInventoryView`；内容 Tab 继续由 Schema ids 动态生成，并与 Inventory 选择联动
+- [ ] 3.3 增加 Execution Progress 区（tasks completed/total）与 Header 上下文（writable root、schema、任务进度；有 store 时摘要）
+- [ ] 3.4 更新 Change Detail 相关路由/源码断言测试与 i18n 文案
+
+## 4. Changes Workspace（Dashboard）共用 Inventory
+
+- [ ] 4.1 Dashboard 增加 `selectedChangeName`（或等价选中态）：选中 change 后请求与 Detail 同源的 inventory
+- [ ] 4.2 在选中面板渲染同一套 `ArtifactInventoryView`（workspace variant）；提供明确 Open Detail 入口，避免破坏现有打开习惯
+- [ ] 4.3 确保同一 scope 下 Workspace 与 Detail 展示的 Schema keys / Other entries 一致（集成或单测断言同 payload）
+- [ ] 4.4 Dashboard 无选中时不展示张冠李戴的 Inventory
+
+## 5. 收尾验证
+
+- [ ] 5.1 运行 `pnpm test` 与 `pnpm run build`
+- [ ] 5.2 运行 `openspec validate align-shared-artifact-inventory-ui --strict`
+- [ ] 5.3 手工验证：Dashboard 选中 `add-change-lifecycle-filtering-and-pagination` 可见 `task-details · 6 files`；打开 Detail 看到相同 Other，且无固定 Stepper 作为主 readiness UI