[henrychu04]

Summary

Syncs upstream pingdotgg/t3code main from ade473018d to 4f0b74e190 (88 commits) into coder-only, taking upstream's code 1:1 and reapplying only the listed seams. It is one merge commit plus focused adaptation commits. Upstream's web redesign stack (pingdotgg#28839–pingdotgg#28845) is not in this range.

The six whole-commit cuts were reverted on a scratch tree at 4f0b74e190, so each revert resolved against upstream's own code. The fork was merged with that tree, and then the merge was recorded against 4f0b74e190 with git read-tree, so none of the cut hunks land. sync.md now describes this recipe.

Carried

• refactor: upgrade Legend List to 3.7.2 and drop our list workarounds pingdotgg/t3code#28125: Legend List 3.7.2. Upstream's 3.3.5 patch is gone, along with the fork's trimmed copy and its seam entry.
• feat(web,mobile): @-mention a model to name it for the agent pingdotgg/t3code#31207 (@-mention a model), feat: Labs option to suggest your next prompt after Claude and Codex turns pingdotgg/t3code#28047 (Labs: suggest next prompt), and feat(settings): clean up Labs: promote tool calls, remove plan mode and old toggles pingdotgg/t3code#33131 (Labs cleanup, which removes plan mode, the plan follow-up, and the legacy context meter).
• fix(provider-core): agents ask for a sudo password through the private secret card pingdotgg/t3code#27748 and fix: secret cards show the agent's sign-in link as a button pingdotgg/t3code#33157: secret card changes, with upstream's card kept as is.
• Codex /goal and Claude compaction fixes: fix(server): Codex /goal no longer tries to create the goal twice pingdotgg/t3code#33260, fix(server): background command results reach a running Codex goal pingdotgg/t3code#33268, fix(server): steering during a Claude compaction shows it stopped, not failed pingdotgg/t3code#33291.
• Sidebar and worktree perf: perf(sidebar): avoid full git status for branch labels pingdotgg/t3code#32947, perf(server): batch worktree branch allocation and avoid path collisions pingdotgg/t3code#32934, perf(server): skip unnecessary worktree cleanup scans pingdotgg/t3code#32933.
• Shell and thread socket loading: perf(mobile): thread list resumes from the saved cache, and large gaps reload over gzip HTTP pingdotgg/t3code#32287 (client-runtime part) and perf(mobile): threads open over the socket without an extra HTTP round trip pingdotgg/t3code#33306.
• fix(clients): unloaded thread links show their title and project icon pingdotgg/t3code#32830 thread link metadata, which adds the new getThreadLinkMetadata RPC. Also fix(composer): persist model picks before the next message pingdotgg/t3code#31739, fix(server): wake idle parents for late delegated results pingdotgg/t3code#32573, fix(server): delegated Claude tasks report the model that ran pingdotgg/t3code#27753, fix(server): include thread titles in MCP links pingdotgg/t3code#33255, fix(server): macOS Bash terminals now start as login shells pingdotgg/t3code#22295, fix(server): a duplicate variable row no longer deletes a stored secret pingdotgg/t3code#31337, FEATURE: Fast and Ultrafast service tiers for Pi models pingdotgg/t3code#33177 (Pi service tiers), and the web fixes fix(web): keep the wide table scrollbar visible when it overflows pingdotgg/t3code#24084, fix(web): file chip tooltips show the whole path pingdotgg/t3code#27993, fix(web): sidebar search results can be dragged onto the composer pingdotgg/t3code#28016, fix(web): boring sidebar threads drag onto the composer again pingdotgg/t3code#26724, fix(web): cmd+shift+o picks the current project before pinned ones pingdotgg/t3code#33109, fix(web): Markdown tasks no longer stay checked after their source is unchecked pingdotgg/t3code#27353, fix(web): return focus to composer after timeline prompts pingdotgg/t3code#33192.
• perf(server): macOS worktrees open 2x faster by cloning a cached checkout pingdotgg/t3code#32927 (macOS cached-checkout cloning) is carried as upstream.
  • On Linux, CheckoutCloner is undefined, so fastCheckout is false and worktree creation runs the same git -c checkout.workers=… worktree add -- <path> <ref> as before. clearWorktreeCheckoutCache does nothing there.
  • The helper omits the fastWorktreeCheckout capability, because upstream sends it only from macOS.
• feat(web): first run is one Welcome page instead of a 3-step wizard pingdotgg/t3code#33209 is carried only where it makes sense without the Welcome page. AppSidebarLayout gets upstream's showSidebar prop, defaulting to true, and AddProviderInstanceDialog gets the onCreated(instanceId, driver) signature.
• feat(web,server): use T3 Code in another app (MCP) pingdotgg/t3code#33196: only its non-feature FoldedSettingsSection.tsx narrow-screen layout fix is kept, because StorageSettings uses it.

Cut

• Decided in the brief:
  • feat: text generators let model APIs write titles, commits, and transcript cleanup pingdotgg/t3code#33147: text generators.
  • feat: Settings reclaims freed database space in one click pingdotgg/t3code#32941: Reclaim freed database space. DatabaseStorage.ts is unchanged; this will be ported separately.
  • feat(web,server): use T3 Code in another app (MCP) pingdotgg/t3code#33196: use T3 Code in another app over MCP.
  • feat(source-control): add Cursor Origin provider pingdotgg/t3code#33093: Cursor Origin.
  • feat(cli): npx t3 offers to install the t3 command pingdotgg/t3code#33150 and feat(desktop): a fresh install sets up the t3 command pingdotgg/t3code#33153: the t3 command installers.
  • feat(web): first run is one Welcome page instead of a 3-step wizard pingdotgg/t3code#33209's Welcome page, welcomeState, route, About row, and settings search item.
• Under existing cuts:
  • Voice input: fix(web): mic button always sits next to send pingdotgg/t3code#33133 (the mic slot beside send) and the prompt suggestion's dictation check.
  • Local editors: fix(desktop): open cursor:// and vscode:// file links from chat pingdotgg/t3code#23486 (cursor:// and vscode:// file links). They would open a laptop editor on a workspace path, and contracts editor.ts is not carried.
  • Mobile, desktop, marketing, release and CI changes.
  • The peer pairing certificate fixtures (fix(server): name rejected certificates when linking peers pingdotgg/t3code#28060), the T3 Connect MCP URL (fix(web): Copy MCP URL uses the T3 Connect address pingdotgg/t3code#32937), GitHub Unix sockets (fix(server): respect gh Unix sockets for GitHub requests pingdotgg/t3code#27733), Antigravity and Muse changes, secret-provider changes (fix(web): removing a secret provider lists the Simlock tokens that read from it pingdotgg/t3code#31754, docs(secrets): sign op in with a service account or Connect on remote servers pingdotgg/t3code#31760), and the relay approval push (fix(server): phones get the approval push when a subagent waits pingdotgg/t3code#24079).
• ChatView.modelPick.browser.test.tsx (fix(composer): persist model picks before the next message pingdotgg/t3code#31739) is not carried because it needs the cut fake environment harness. It is added to DELETED_PATHS.

Adaptations

• Claude CLI transport. feat: Labs option to suggest your next prompt after Claude and Codex turns pingdotgg/t3code#28047 passes promptSuggestions to every query(), which the transport rejected and would have failed every Claude turn. ClaudeCli.ts now sends it in initialize, as the SDK does, and the existing initialize-shape test covers it.
• ws.ts. It serves the four new RPCs (prompt suggestion, branch status ×2, thread link metadata) and gains ProviderSessionManager. CoderWsRpcGroup lists them, and the helper advertises vcsBranchStatus.
• ffi-rs. Upstream's dependency is restored for CheckoutCloner, following sync.md's rule for dependencies removed by old cuts. It loads only on macOS. The helper bundle now ships its linux-x64 prebuild (about 850 KB), which is never required.
• Tests. The fork-only Pi file-bridge test stubs registerCommand (FEATURE: Fast and Ultrafast service tiers for Pi models pingdotgg/t3code#33177), and fix(server): a duplicate variable row no longer deletes a stored secret pingdotgg/t3code#31337's settings test drops the cut managed policy layer.
• Bookkeeping. knip.jsonc ignores agentAwareness.ts (its new export is relay-only), SYNC_BASE is now 4f0b74e190, and the GitLabCli "checked against" line is updated. Docs keep the fork's wording; the merge-request wording swap was applied to Labs' two-line row text.

Upstream issues

The range fixes none of the open upstream issues #229, #231, or #232.

Verification

• pnpm test:coder: pass, exit 0 in one foreground run. server 274 files / 4216 tests; web unit 281/4019; web browser 128/577; every other package passes.
• Every typecheck in AGENTS.md: pass, 0 errors. That covers gateway, helper, server, web, contracts, shared, client-runtime, coder-cli, provider-core/pi/testing, effect-acp/provider-acp/provider-acp-registry, and source-control core/gitlab/testing.
• pnpm knip:check: pass.
• node scripts/seams-check.mjs 4f0b74e190: pass.
• sync-check markers / lost / both-sides / unused-locals: reviewed. unused-locals prints nothing. One marker drop sits inside the plan follow-up test upstream deleted. Every lost line belongs to a cut commit.
• No .orig or .rej files are tracked.
• pnpm build: pass.
• vp fmt --check over the changed files: pass.
• Local helper smoke (a scratch script, not committed): drove apps/coder-helper/src/bin.ts over stdio. Helper negotiation passed. server.getConfig reports threadLinkMetadata, vcsBranchStatus, and promptSuggestionsEnabled, with no fastWorktreeCheckout, mcpApprovalCodes, or textGenerators. getThreadLinkMetadata, vcs.refreshBranch, and subscribeVcsBranch all answer on a temp repo, and the reclaim and text-generator RPCs are unknown, as intended.
• Not run: a browser UI check, which needs permission, and a real Coder workspace or real provider turn.

Review follow-up

Two Fable 5.1 reviewers (server/packages and web) found no high or medium issues. Applied on this branch:

• Cut perf(server): macOS worktrees open 2x faster by cloning a cached checkout pingdotgg/t3code#32927 (macOS fast worktree checkout) in bd051a7d12: it only runs on macOS (clonefile), so it is dormant in Linux workspaces. Removes CheckoutCloner.ts, worktreeCheckoutCache.ts, gitIndexStat.ts, the server's direct ffi-rs dependency (which also drops the duplicate 1.3.2 in the lockfile), the fastWorktreeCheckout setting and capability, and the Labs row and search item. Listed in the seams doc.
• scripts/sync-resolve-deleted.mjs now lists every file the cuts in this sync add, so later modify/delete conflicts on them resolve automatically.

Left as is: undici stays at 8.12.2 (only jsdom uses it, web tests on the laptop only); the fork's rewritten docs/user/composer.md never had pingdotgg#33131's sentence.

Reverified on bd051a7d12: all AGENTS.md typechecks, seams-check, knip:check, pnpm build, and full pnpm test:coder pass. Server 4198 tests, 1 skipped; an earlier run had one load-related timeout already tracked in #236, and that file then passed 3× on its own.

🤖 Generated with Claude Code