fix(web): project settings can split a checkout out of its group again

[D3OXY]

I cloned a fork next to a clone of the original repository, and T3 Code merged them into one project. The option to keep a checkout separate was nowhere to be found in the new sidebar or in project settings. It still works, but only the legacy sidebar can set it now: #10639 dropped the per-checkout grouping control from project settings (added in #5768), and the new sidebar has no project menu.

Project settings can set and clear the rule again. A single-checkout project gets a Grouping row. A project with several checkouts gets a picker on each row under Checkouts, so you can split one out without touching the rest. Use default removes the override. The page already follows the project to its new key when its grouping changes. Every project entry point in the new sidebar (the project picker's gear, right-clicking a project, and a thread's Project settings) leads to this page.

The legacy sidebar's dialog now shares the labels and the save helper (withProjectGroupingOverride), so the two cannot drift. The user guide gains a short section that explains that upstream wins over origin and that overrides are saved per device.

Surfaces:

• Web and desktop: covered (desktop wraps web).
• Mobile: out of scope. Mobile has no overrides; it only uses the global mode.
• Providers, contracts, and the server: not affected.

Related issues:

• [Bug]: the name of forks are the same title as the upstream repo #4880: forks take the upstream repository's name. The main workaround there is turning off project grouping globally; this makes the per-checkout workaround reachable again.
• Sidebar project ungrouping (same repository) is HARD TO FIND #4188: closed as fixed by feat(web): overhaul project settings into a real settings page #5768; feat(settings): edit any scopable setting as a project override #10639 regressed it.
• [Bug]: Folders added from inside one repository merge into a single project, so I cannot start a thread in a specific folder #10930: closed because "the per-checkout grouping override already handles this", but no current page could set that override.

Made with Claude Opus 5.5 in Claude Code.

[macroscopeapp]

Approvability

Verdict: Approved at 3929745

Macroscope's review found this PR approvable — This restores access to an existing per-checkout grouping override in project settings and keeps the legacy sidebar behavior aligned through a small shared helper. Changes are local, opt-in, backward-compatible, and supported by focused grouping tests.

Notes:

• Macroscope's correctness review did not run, so approvability was decided on eligibility alone.

No code changes detected at e220926. Prior analysis still applies.

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[D3OXY]

@juliusmarminge @shivamhwp #10639 removed the per-checkout grouping picker from project settings, so the only place to set it now is the legacy sidebar. This PR puts it back. Mind merging so the next nightly picks it up?

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📝 Walkthrough

Walkthrough

The change adds a shared helper for per-checkout grouping overrides and adds grouping controls to project settings. It also updates the sidebar to use the helper and documents the grouping rules.

Changes

Per-checkout project grouping

Layer / File(s)	Summary
Override update helper packages/client-runtime/src/state/projectGrouping.ts, apps/web/src/logicalProject.ts, packages/client-runtime/src/state/projectGrouping.test.ts	The new helper copies the override map, then sets or removes the project’s physical-key entry. The helper is re-exported, and the test checks both setting an override and restoring inheritance.
Project settings grouping controls apps/web/src/components/settings/ProjectGroupingSelect.tsx, apps/web/src/components/settings/ProjectSettingsPanel.tsx, apps/web/src/components/LegacySidebar.tsx, docs/user/project-settings.md	Project settings now provide grouping controls for checkouts. The sidebar uses the shared labels and override helper. The documentation describes repository-based grouping and device-local overrides.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix

Suggested reviewers: juliusmarminge, maria-rcks

Merge Risk: 🔵 Low · up to 39297

Grouping updates work, but splitting a checkout can leave settings showing its former sibling group. This bounded navigation issue has a sidebar workaround and merits a localized fix.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 39297

The new controls reuse the existing per-checkout grouping mechanism without granting additional permissions. Grouping changes remain local to the device, and project removal still requires explicit confirmation. Persistence failures and navigation after regrouping have limitations, but no introduced security vulnerability was established.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• observed — Each normal grouping transition targets one device-local override keyed by environment and normalized workspace path. The selector receives an existing checkout member rather than accepting a free-form project identifier, and the helper preserves sibling overrides.

Trust Boundaries and Controls

• observed — The newly reachable UI writer rejects invalid modes and sends only a client grouping patch. LegacySidebar's unified settings path already routes the same field to client persistence. The inspected transition does not introduce server-setting authority, credentials, or an automatic project-deletion path.

Resilience and Maintainability Implications

• inferred — The existing queue serializes persistence, but replacement maps computed from the same render snapshot can overwrite sibling changes. Persistence failures are logged without reverting optimistic grouping, so displayed and durable preferences can diverge. The legacy caller already used these semantics; no security-control loss was established. Cross-tab serialization and storage recovery remain unverified.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 6 files. (1 skipped: 1…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: restoring the ability to split a checkout out of its project grouping.
Description check	✅ Passed	The description clearly explains the problem, the implemented changes, affected surfaces, scope, and related issues. It does not use the template headings or include the required before/after screensh…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

Docstring coverage is 40.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 6 files. (1 skipped: 1 unsupported.)

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Inline comments:
Review comments at @apps/web/src/components/settings/ProjectGroupingSelect.tsx:
- Around line 25-68: Update ProjectGroupingSelect’s grouping-change flow to
preserve the edited checkout as the navigation target when grouping changes, so
project-scoped navigation resolves to that checkout’s resulting group rather
than a surviving sibling group. Coordinate with ProjectSettingsPanel’s URL
reconciliation as needed; do not rely only on checking whether the current group
has members.

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📒 Files selected for processing (7)

• apps/web/src/components/LegacySidebar.tsx
• apps/web/src/components/settings/ProjectGroupingSelect.tsx
• apps/web/src/components/settings/ProjectSettingsPanel.tsx
• apps/web/src/logicalProject.ts
• docs/user/project-settings.md
• packages/client-runtime/src/state/projectGrouping.test.ts
• packages/client-runtime/src/state/projectGrouping.ts

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[juliusmarminge]

Note

This comment is posted by Julius' dot

The missing per-checkout control is a useful regression report, but I'm closing for missing UI verification. The PR adds grouping selectors to Project settings without before/after screenshots or a recording of the changed interaction. Please demonstrate splitting a checkout and restoring Use default in the current client, with observed results and before/after evidence, then request reconsideration.