[henrychu04]

Stage 1 of the sync to upstream e923627: upstream's pingdotgg#25423 (ed44f25) alone, merged with --no-ff onto coder-only (9486780).

What upstream brings

pingdotgg#25423 cuts T3's MCP tool schemas by a third and merges 18 tools into action tools: t3_queue, t3_pending_request, t3_thread_configure, t3_thread_transfer, schedule_task (now also updates), and PR link/unlink moving to the pull-request toolkit. It adds advertisedJsonSchema.

How it lands on the file bridge

• The bridge catalog and dispatch are built from upstream's toolkits and handlers, so the merged tools reach --list, --schema and calls with no bridge change.
• Seam: the bridge's --schema prints upstream's compact advertisedJsonSchema. This is what upstream's MCP server advertises (fix(server): all MCP tools now send compact schemas, cutting tool context by 23% pingdotgg/t3code#25790 applies it to every tool).
• Plan mode follows upstream. The action tools are marked destructive, so plan mode refuses even their read actions, as upstream's Claude plan-mode allowlist dropped them. This is documented in docs/internals/coder-only.md.

Conflicts

• McpHttpServer and its test, the preview toolkit, toolkits/core.test.ts, and mobile threadActivity stay deleted, because they are cut surfaces.
• pullRequests/handlers.test.ts keeps the GitCafe cut. It takes upstream's subagent PR-report test, run on a GitLab merge request URL.

Verification

• Every typecheck in AGENTS.md passes.
• pnpm test:coder passes. It was run with a real-path TMPDIR for the known ClaudeSkills plugin-order test fails on macOS (/var symlink) #235 macOS failure. One browser test, AttachmentFilePreview.browser.test.tsx, failed under parallel load and passes alone (Tests that flake under full-suite load #236).
• pnpm knip:check, pnpm build, and vp fmt --check on changed files all pass.
• Mechanical checks (marker counts, upstream lines missing, both-sides losses) report nothing.
• Mock smoke: the gateway serves the web client, and the helper answers thread search and pullRequests.filterOptions.
• Throwaway bridge test (not committed):
  • --list shows the merged tools and none of the old names;
  • --schema t3_queue prints one compact object with an action enum;
  • t3_queue {action:"list"} returns {items:[],nextCursor:null};
  • plan mode answers PlanModeReadOnly.
• The Linux helper bundle boots in a node:24-bookworm-slim amd64 container: migrations run and __document-text extracts an RTF.

🤖 Generated with Claude Code