upstream: official claude code updates 2026-06-18

[github-actions]

upstream changes detected

sources: anthropic/official-docs, shanraisshan/claude-code-best-practice
changes found: 2
files edited: 5
staleness flags: 6

what changed upstream

• [commit] Merge pull request feat(cc): eval harness — multi-peer simulation with real measurements (re-targeted) #119 from shanraisshan/settings-drift/2026-06-18 (link)
• [docs_change] Official Claude Code docs updated (link)

staleness flags

file	claim	reality	severity
docs/tips/fast-mode.md	fast mode keeps you on opus. it does not switch to a cheaper or smaller model.	claude code v2.1.181 may have updated model selection behavior or effort level interactions that affect which models fast mode uses	medium
docs/cost.md	my real numbers: $200/mo. Max plan. flat rate. no per-token billing.	official docs now show claude code's actual billing tiers and may have introduced new plans or rate changes since last verification	high
docs/comparisons/antigravity.md	antigravity is currently in public preview and free for individual users	june 2026 verification shows antigravity may have exited public preview or changed pricing/availability status	high
docs/tips/hooks-v2.md	five handler types: command, http, prompt, agent, mcp_tool (v2.1.118+)	v2.1.181 may have introduced additional hook types or deprecated some; behavior and safety features have evolved	medium
docs/tips/monitor.md	monitor is event-driven, costs zero tokens when idle (v2.1.98+, stable as of v2.1.145)	v2.1.181 is significantly newer; monitor behavior, cost characteristics, or availability on bedrock/vertex/foundry may have changed	medium
docs/session-workflow.md	context loading: CLAUDE.md, skills, hooks work together on startup	v2.1.181 may have altered context loading order, cache behavior, or which customizations load at session start	low

proposed edits

• docs/cost.md: official docs now accessible; users should verify against current source
• docs/comparisons/antigravity.md: antigravity public preview status is unconfirmed as of june 2026; table header needs verification before update
• docs/tips/hooks-v2.md: significant version gap (122 to 181); hook internals may have changed
• docs/tips/monitor.md: large version gap since last verification; monitor may have expanded or regressed on certain platforms
• docs/session-workflow.md: 59-version gap from v2.1.122 to v2.1.181; context system may have evolved

review checklist

• staleness flags accurate?
• version numbers and pricing correct?
• proposed edits read naturally?

auto-generated by official-watcher