[Bil0000]

Problem

The Diff pane needs a way to inspect one local commit and open a code-host commit link in the current thread.

Change

Add bounded commit browsing and per-file reads. GitHub, GitLab, Forgejo/Gitea, GitCafe, Bitbucket Cloud, and Azure DevOps commit links use their provider URL rules and validate the real thread workspace. Modified clicks keep browser behavior. Unavailable PR commits continue through the PR panel resolver; other unavailable links follow the browser setting.

Preserve main's tool-call diffs and saved branch comparisons. The follow-up fixes desktop Enterprise link routing, rejects shallow boundary commits with missing parents, and keeps the selected SHA clear of the header controls.

Scope and approval

Implements discussion #6924 and Julius's commit-link request. Fresh maintainer approval is still required. This PR stays open and unmerged.

Verification

Final follow-up head: b77e8bfac9d1c160e935838246d3136ce4c78a7b. The commit-feature code is unchanged from 3d926d10ff, which passed all eight required checks and completed review. Main's mobile-only row fix e34067edef merged cleanly; its scoped format, lint, both unused-code checks, and mobile/scripts types pass. All eight required checks are green on this final merge, every CI check has finished without failure, and no review threads remain unresolved. Fresh maintainer approval is still required.

• All 175 Git driver tests passed, including a real depth-1 clone and true-root/first-parent cases.
• Final focused browser result: 16 passed in three files, exit 0. Web and server types also passed again after merging current main d464631407.
• vp run check:changed 9050c6ecc08cb3ab9c94db34eb66048258bf3a07 passed format, lint, GraphQL, both unused-code checks, four affected package type checks, and 175 server tests. Its browser step failed to connect. After a Chromium startup check, the three affected browser files were run separately. The combined gate is not claimed as passed.
• The new Enterprise, shallow-boundary, late-list, modifier, and popup cases each failed on the unfixed source. Final staged Ponytail review and independent Sol round 3 approved the seven-file follow-up.
• Header proof uses real UI controls in a fixture. It covers pointer hover/click at 540px and 390px panel widths. It is not a full-app or mobile pass.

The final review fixes preserve typed cancellation errors for shared description requests, correct the workspace error message, and clarify the user guidance. Both service regressions failed before the fix; all nine service tests pass. The full vp run check:changed 23edf994bd22ae86688be539775ce09eafbbce22 gate passed: format, lint, GraphQL, both unused-code checks, three affected type checks, and all nine service tests.

Optional test follow-up from the final review: assert the result of each concurrent caller separately. The existing regression checks the combined typed failure, one generation call, and retry; it does not prove individual delivery to both callers.

Cold generation still depends on the configured model. No instant cold-generation claim is made.

Demo

CleanShot.2026-10-25.at.5.08.59.AM.mp4

Prepared picker: short recording extract.

Reviewed with sol-loop: GPT-6.1 Sol high/priority. The final staged follow-up was approved in round 3.

Final follow-up: GPT-6.1 Sol high/priority in Codex. Earlier work also used Opus 5.5 high and GPT-6 Astra high.

Follow-up header proof

The follow-up repairs the selected-commit SHA hit target. These captures use a recreated header with real UI controls, not the full app. At 1440x900, both 540px and 390px panels pass pointer hover/click and geometry checks for short and long subjects. The fix is included in 23edf994bd22ae86688be539775ce09eafbbce22 and passed both final reviews. Existing full-app evidence above remains unchanged.

Staged first in temporary fork draft #130, now closed.

Follow-up implementation and review: GPT-6.1 Sol high/priority in Codex.

Takeover

Round 5 (130cec6b61): generated commit descriptions are removed. Agents already write the commit subjects, so a model-written line repeated them, and the warmup ran a model call in the background on every chat view with branch commits. The Commits picker shows subject, SHA and date. This drops the review.generateCommitDescriptions RPC, the generateCommitDescriptions text generation operation in every provider, the server description cache, both web hooks and their tests (−966 lines), and merges current main, which clears the permissions conflict. Sections below that mention descriptions describe earlier rounds.

28134374b1: a commit link opens in the Diff pane whenever the repository has the commit locally, on any branch, not only when it is an ancestor of HEAD. The check stays local (cat-file -e with GIT_NO_LAZY_FETCH). The merge-preview test now also opens a commit from an unmerged branch; it fails on the old ancestor check.

Taken over from @Bil0000 (rounds 1–4). Behaviour unchanged: a Commits source in the Diff pane with short model descriptions, and code host commit links that open the commit in the Diff pane. Round 4 kept the contributor's follow-up fixes, cut the tests from 19 to 12, and read shallow-clone parents from the raw commit object (git cat-file commit).
Round 4 review fixes: Shift/Alt clicks on pull request commit links no longer open the PR panel. On web, an unavailable commit link shows Open link when the Browser preference is "app" but in-app preview is unavailable. A text generation fake added on main implements the new method.
Dropped: the per-host commit URL table test, the background warmup test, the mobile filter test, and the merged duplicate retry/ownership variants.

Evidence

Before e34067edef (merge base) | After dbb22e5272 (rendering code identical to b77e8bfac9; later commits change click routing, server code, docs and a test fake, not rendering).

Environment: real web dev apps, Chrome 148, no device emulation, DPR 1, 100% font scaling, 1440×900 dark/light and 390×844 light, browser clock frozen, descriptions from a deterministic transport stub, fresh databases seeded through the app. Diff0 marks any RGB change; Diff16 marks a channel change above 16/255.

Commit menu, Before | After | Diff0 | Diff16, dark and light:

Row (matrix)	Sheet
E01 linked menu, long subjects and descriptions, 1440 dark/light	E01
E02 single local commit, plain SHA	E02
E03 cold list loading → rows (harness-held replies)	E03
E04 descriptions arrive with the list open	E04
E05 empty branch comparison	E05
E06 commit list error and recovery	E06
E07 selected long subject, SHA and header controls	E07
E08 selected preview loading → resolved	E08
E09 whitespace-only commit → empty diff	E09
E10 merge commit against its first parent	E10
E11 narrow sheet, 390 light	E11
E15 unavailable web link → Open link toast	E15
E16 back to Changes and Uncommitted (zero changed pixels)	E16
E18 capped list with the latest-100 footer	E18

Recordings with step timestamps, Diff0/Diff16 per pair and per-row limits: evidence section, index. Scripts: seed.py, setup-app.mjs, capture.mjs.

What else changed:

• The Commits submenu adds subject, description, SHA and date rows; the scrollable popup covers part of the branch patch.
• Selecting a commit replaces the Changes header and base selector with the commit subject and SHA, and the totals and files with the commit's.
• Loading, empty and error states inside the submenu are new.
• Server chat timestamps were not frozen and differ between sides.

Unverified: E12–E14 (link routing to Diff, PR panel and Browser, web and desktop: the routing captures were not comparable), E17 (the native commit filter: the after-state text was clipped in the capture), Shift/Alt on pull request commit links and the saved "app" preference without preview (both covered by browser tests only), and the optional rows O01–O23.

Verification log

• Tests: 19 → 12 across GitVcsDriverCore (root and shallow boundary, bounded list, merge first parent), ReviewService (descriptions with cache and retry; thread ownership), RpcAuthorization (operate scope), DesktopWebLinkCoordinator (Diff, PR panel, ordinary fallback incl. Enterprise host), openPullRequestLink (Shift/Alt incl. PR commit links; Open link with "system" and "app" preferences), useCommitDescriptions (late list). Each fails with its fix reverted.
• Review round 1: Sol FIX_FIRST (Shift/Alt on PR commit links opened the PR panel; fixed), Opus MERGE (docs said "workspace has the commit"; fixed).
• Review round 2: Sol FIX_FIRST (toast checked the saved preference, not whether preview can open; fixed), Opus MERGE.
• Review round 3: Opus MERGE; Sol FIX_FIRST: typecheck against main's new text generation fake (fixed), and two open findings: Shift/Alt with the "app" preference is still opened in preview by ChatMarkdown's link handler, and Enterprise/Azure Server commit links on a default port match a workspace cloned with an explicit port.
• Checks on the merged head: format, lint, graphql, knip 1/2 and 2/2, typecheck of server, web, mobile, contracts, client-runtime, provider-core, provider-muse, provider-opencode and source-control packages, 199 server tests and 15 web link tests pass. vp run check:changed as a single command did not finish on the VM and was run step by step.
• Proof audit pass 2 was not run this round.
• Models and harnesses: Opus 5.5 high (lead, tests, implementation, reviewer B) in Claude Code under T3 Code; GPT-6.1 Sol high (reviewer A, proof audit, evidence capture) in Codex.

[macroscopeapp]

Approvability

Verdict: Needs Human Approval

Macroscope's review found this PR requires human approval — Adds local commit browsing and commit diffs with bounded, workspace-authorized reads. Commit links now open the Diff pane under an existing default-enabled preference, so the changed default link behavior needs human confirmation.

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Walkthrough

This change adds commit listing, commit previews, and generated descriptions to review flows. The Diff panel can select commits and load their files. Supported source-control links can route available commits to the Diff panel or use pull-request and browser handling.

Changes: Commit review backend

Layer / File(s)	Summary
Commit contracts and Git operations packages/contracts/src/review.ts, packages/contracts/src/rpc.ts, apps/server/src/vcs/*, apps/server/src/review/ReviewService.ts, apps/server/src/ws.ts, apps/server/src/auth/*, apps/server/src/observability/RpcInstrumentation.ts	Review contracts and RPCs support branch-commit listing, commit previews, and description requests. Git operations list up to 100 branch commits, resolve selected commits, and provide commit-based previews and file contents.
Commit description generation packages/provider-core/src/server/*, packages/provider-muse/src/server/textGeneration.ts, packages/provider-opencode/src/server/*, packages/provider-fx/src/server/driver.ts, packages/provider-acp-registry/src/server/driver.ts, apps/server/src/textGeneration/TextGeneration.ts, apps/server/src/review/ReviewService.ts, apps/server/src/provider/Drivers/CodexManagedProvider.ts, apps/server/src/server.ts	Text-generation providers accept commit context and return validated descriptions. The review service checks thread workspace ownership, uses project model settings, and caches and shares description requests. Tests cover model selection, workspace validation, and retries.

Commit URL support and routing

Layer / File(s)	Summary
Commit URL support and routing packages/source-control-core/src/shared/definition.ts, packages/source-control-*/src/shared/definition.ts, packages/source-control-definitions/src/registry.ts, packages/client-runtime/src/changeRequestLinks.ts, apps/web/src/lib/openPullRequestLink.ts, apps/web/src/components/desktop/DesktopWebLinkCoordinator.tsx	Source-control definitions build and parse commit URLs for supported providers. Link handling can preview available commits in the active workspace and route unavailable commits through pull-request or browser handling.

Commit selection and Diff panel

Layer / File(s)	Summary
Commit selection and Diff panel apps/web/src/components/DiffPanel.tsx, apps/web/src/diffPanelStore.ts, apps/web/src/components/diffs/*, apps/web/src/components/ChatView.tsx, apps/mobile/src/features/review/reviewModel.ts, packages/client-runtime/src/state/review.ts, docs/user/source-control.md	The Diff panel lists branch commits, selects commit diffs, loads file patches, and displays generated descriptions and commit metadata. Description warmup requests descriptions for the first batch when its gating conditions are met. Mobile review sections exclude commit sources.

Priority: Normal

Estimated code review effort: 4 (Complex) | ~60 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant DiffPanel
  participant ReviewRPC
  participant ReviewService
  participant GitVcsDriverCore
  participant TextGeneration
  DiffPanel->>ReviewRPC: Request branch commits
  ReviewRPC->>ReviewService: Forward request
  ReviewService->>GitVcsDriverCore: List commits
  GitVcsDriverCore-->>ReviewService: Return commit metadata
  ReviewService-->>ReviewRPC: Return branch commit result
  ReviewRPC-->>DiffPanel: Display commit list
  DiffPanel->>ReviewRPC: Request descriptions
  ReviewRPC->>ReviewService: Forward description request
  ReviewService->>GitVcsDriverCore: Read commit context
  GitVcsDriverCore-->>ReviewService: Return commit context
  ReviewService->>TextGeneration: Generate descriptions
  TextGeneration-->>ReviewService: Return descriptions
  ReviewService-->>ReviewRPC: Return descriptions
  ReviewRPC-->>DiffPanel: Display descriptions

Loading

Possibly related issues

• pingdotgg/t3code#22886 — Concerns persistence of selected commit and file state during pull request updates or editor round trips; this change adds commit selection but does not show that persistence issue being addressed.

Suggested reviewers: juliusmarminge

Merge Risk: Low · previous review 3d926

Concurrent commit-description failures are not fully covered by the regression test. The change is mergeable with a follow-up to strengthen that test.

Architecture risk: Low · up to 5235a

The change affects 7 systems.

Changed systems: apps/server, apps/web, apps/mobile, packages/contracts, docs, packages/client-runtime, scripts

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

• observed — apps/server (service) was modified; 9 changed files map to changed impact.
• observed — apps/web (ui) was modified; 6 changed files map to changed impact.
• observed — apps/mobile (service) was modified; 2 changed files map to changed impact.
• observed — packages/contracts (library) was modified; 2 changed files map to changed impact.

Before / after behavior

• observed — Modified behavior in apps/mobile/src/features/review/reviewModel.test.ts: Added a commit preview source to the test input, with abc123 as its ID and head ref, parent as its base ref, and a commit title. The expected section IDs are unchanged and still list only the working-tree and branch-range git sections.
• observed — Modified behavior in docs/user/source-control.md: Adds instructions for reviewing local commits on web and desktop: select Commits in the Diff pane source picker to view up to 100 newest commits in the current branch comparison. Merge commits are compared with their first parent; after the branch changes, selecting a commit again refreshes the view.
• observed — Modified behavior in packages/client-runtime/src/state/review.ts: The returned atom collection adds branchCommits, configured as an environment RPC query for reviewGetBranchCommits with a 5-second stale time.
• observed — Modified behavior in packages/contracts/src/review.ts: ReviewDiffPreviewInput.file.sourceKind now permits "commit" alongside the two existing source kinds.

Pre-merge checks: 3 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Description check		The description includes all required headings and detailed verification evidence, but it contains material contradictions with the changed files. It states that generated commit descriptions and rela…	Update the description to match the final diff. Either remove the remaining commit-description implementation or document it as part of the change. Remove stale takeover and line-count claims. Reconcile the reported check results and unveri…

Passed checks: 3 passed

Check name	Status	Explanation
Title check		The title clearly and concisely describes the main change: reviewing local commits in the web Diff pane.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description includes all required headings and detailed verification evidence, but it contains material contradictions with the changed files. It states that generated commit descriptions and related code were removed, while the diff still adds commit-description contracts, server operations, provider support, caching, web hooks, and tests. The scope section also states that fresh maintainer approval is still required.

Resolution

Update the description to match the final diff. Either remove the remaining commit-description implementation or document it as part of the change. Remove stale takeover and line-count claims. Reconcile the reported check results and unverified items. Add the required explicit maintainer approval comment, or explain why this focused change qualifies for an exemption.

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Review comments at @apps/web/src/components/DiffPanel.tsx:
- Around line 498-505: Update the baseRef value passed by DiffPanel to use
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conditioning it on selectedCommitSha. Preserve the surrounding file-expansion
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Review comments at
@apps/server/src/orchestration-v2/Adapters/ClaudeAdapterV2.test.ts:
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- Line 242: Update the lockfile validation in the release smoke flow around the
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[juliusmarminge]

Feature accepted.

Something I want to go alongside this is that source control links (e.g. 5235a68) should open in the panel with the commit preloaded, similar to how PR links are treated today). Mod+Click still opens the link as is of course

[Bil0000]

Implemented in 65b8808. GitHub commit links now open Diff with the commit selected for the current thread's repository. Mod/Ctrl/middle clicks keep the original URL. Older local HEAD ancestors also load, while the commit menu stays limited to the branch comparison.

Verified with 96 focused tests and scoped types, lint, and formatting. The browser click check was blocked by T3 preview timeouts. Main conflicts are resolved; ready for another review.

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[juliusmarminge]

Taking over this one