sync: port upstream platform foundations, contracts, CI, and early mobile/desktop fixes (#4767–#5066)

[aaditagrawal]

Bottom of the 2026-08-06 upstream sync stack (L1/7).

Fork was 83 unique commits behind upstream/main since ancestry 4ba4871a. This layer ports the first 21.

What lands

• Project favicon caching across web/mobile (fix: cache project favicons across web and mobile pingdotgg/t3code#4767)
• CI concurrency / stale-run cuts and EAS/showcase workflow fixes (perf(ci): cut stale runs and redundant setup pingdotgg/t3code#4802, Isolate native diff highlight grammar state pingdotgg/t3code#4029, fix(ci): repair the mobile showcase screenshots workflow pingdotgg/t3code#5057, fix(ci): capture iPad App Store screenshots in landscape pingdotgg/t3code#5065)
• Mobile 1.0.1 bump, photo-library/clipboard/pairing/branding/channel fixes (fix(mobile): remove unnecessary photo library permission pingdotgg/t3code#4929, fix(mobile): accept Android clipboard images in composer pingdotgg/t3code#4836, fix(mobile): default bare IP pairing to HTTP pingdotgg/t3code#4990, fix(mobile): restore iOS Threads branding pingdotgg/t3code#4862, fix(mobile): show the correct build channel in Android's Threads page header pingdotgg/t3code#4861, fix(mobile): server model, worktree, and origin preferences now apply to new tasks pingdotgg/t3code#5064)
• Shared semver shorthand + lenient JSON parser fixes (feat(shared): support shorthand (major-only) versions in the semver helpers pingdotgg/t3code#5027, fix(shared): lenient JSON parser deletes commas inside string values pingdotgg/t3code#5025)
• Contracts: forward-compatible growing config unions (fix(contracts): decode growing config unions forward-compatibly pingdotgg/t3code#5055)
• Desktop Clerk SDK 0.0.24 + Linux t3code:// registration, release-notes toast link (fix(desktop): bump Clerk Electron SDK to 0.0.24 and register t3code:// scheme on Linux pingdotgg/t3code#5015, fix(desktop): link release notes from the update downloaded toast pingdotgg/t3code#4771)
• Server default-branch/origin cache (perf(server): cache default branch name and origin existence across status refreshes pingdotgg/t3code#5008)
• Oxlint bin resolution without assuming pnpm layout (fix(oxlint-plugin): Resolve the oxlint bin without assuming a pnpm layout pingdotgg/t3code#5066)

Fork deviations preserved

• CI stays on GitHub-hosted public runners (macos-26 / ubuntu-24.04) and the fork repo gate (aaditagrawal/t3code)
• Mobile APP_VERSION helper kept; default bumped to 1.0.1
• Follow-up: fix: format index.css for vp check (CI vp 0.2.2 formatting)

Verification

vp check and vp run typecheck pass on the branch tip.

Stacked below L2 (#206). Review bottom-up.

  

Summary by CodeRabbit

• New Features

  • Added a compact “Code” brand header and environment labels across mobile.
  • Added native paste support in the mobile editor.
  • Desktop update notifications now include release-notes links.
  • Linux desktop OAuth callbacks support application URL schemes.

• Bug Fixes

  • Improved mobile pairing URL handling for IP addresses and hostnames.
  • Improved project favicon loading, caching, and refresh behavior.
  • Mobile tasks now honor configured workspace and available model settings.
  • Increased compatibility with newer server configuration data.

• Permissions

  • Removed unnecessary microphone and photo-library permissions from mobile image features.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 74d71564-5822-48a0-8746-e986992d27fb

📥 Commits

Reviewing files that changed from the base of the PR and between 7d99330 and 7d52eed.

📒 Files selected for processing (2)

• .github/workflows/mobile-eas-preview.yml
• docs/operations/mobile-app-store-screenshots.md

📝 Walkthrough

Walkthrough

This PR updates CI and release workflows, desktop startup, mobile navigation and task flows, favicon caching, forward-compatible contracts, Git status caching, web update notifications, and mobile showcase tooling.

Changes

Workflow and dependency installation

Layer / File(s)	Summary
Workflow and tooling updates .github/workflows/*, oxlint-plugin-t3code/test/utils.ts, pnpm-workspace.yaml, .github/ISSUE_TEMPLATE/*	Workflows add concurrency, sparse checkout, and scoped dependency installation. Issue templates, oxlint execution, Clerk versions, and mobile test guidance are updated.

Desktop application behavior

Layer / File(s)	Summary
Desktop identity and update flows apps/desktop/src/app/*, apps/desktop/src/electron/*, apps/web/src/components/desktopUpdate.*, apps/web/src/components/Sidebar.tsx, apps/web/src/components/sidebar/SidebarUpdatePill.tsx, scripts/build-desktop-artifact.*	Desktop startup resolves the user-data path before bridge creation and uses bridge primary-instance state. Update notifications now provide release-notes links and error handling. Linux builds register desktop URL schemes.

Mobile production and showcase tooling

Layer / File(s)	Summary
Production builds and screenshot capture apps/mobile/app.config.ts, apps/mobile/package.json, scripts/mobile-showcase*, docs/operations/mobile-app-store-screenshots.md	Mobile builds use production identifiers and permissions. Showcase setup waits for schema and environment readiness and supports landscape iPad capture with simulator restoration.

Mobile interface and task flows

Layer / File(s)	Summary
Branding and native interaction apps/mobile/src/components/CompactBrandTitle.tsx, apps/mobile/src/features/home/*, apps/mobile/src/features/threads/sidebar-navigation-shell.tsx, apps/mobile/src/native/*, apps/mobile/src/lib/*	Navigation headers use compact branding and variant-based stage labels. Shared layout metrics, paste handling, and pre-paint toolbar updates are added.
Pairing and task selection apps/mobile/src/features/connection/*, apps/mobile/src/features/threads/*, apps/mobile/src/state/use-composer-drafts.*, apps/mobile/src/lib/modelOptions.*, docs/user/remote-access.md	Pairing URL defaults distinguish IP literals from hostnames. Task flows validate model providers, use configured workspace defaults, and selectively clear workspace state.

Favicon and shared data handling

Layer / File(s)	Summary
Project favicon identity and caching packages/shared/src/projectFavicon.*, apps/server/src/assets/AssetAccess.*, apps/mobile/src/components/ProjectFavicon*, apps/web/src/components/ProjectFavicon*	Favicon URLs use content revisions and shared cache keys. Mobile and web request lifecycles handle supersession, failures, loaded sources, and fallback rendering.

Contracts and backend behavior

Layer / File(s)	Summary
Forward-compatible contracts and parsers packages/contracts/src/*, packages/client-runtime/src/rpc/session.test.ts, packages/shared/src/schemaJson.*, packages/shared/src/semver.*	Unknown array entries are filtered during decoding. JSON parsing preserves quoted commas. Shorthand semver versions are normalized and tested.
Git status caching and web presentation apps/server/src/vcs/GitVcsDriverCore.*, apps/web/src/components/ChatView.tsx, apps/web/src/index.css	Git status lookups use TTL-based caches with invalidation after mutations. Web chat styling uses the composer glass treatment, and a CSS selector is reformatted.

Estimated code review effort: 5 (Critical) | ~120 minutes

Possibly related PRs

• aaditagrawal/t3code#152: Both PRs modify project favicon handling across shared, server, mobile, and web code.
• aaditagrawal/t3code#181: Both PRs modify mobile header branding and navigation configuration.
• aaditagrawal/t3code#191: Both PRs modify Git status and ref caching in GitVcsDriverCore.ts.

Suggested reviewers: juliusmarminge

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 17.02% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
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.
Title check	✅ Passed	The title accurately summarizes the broad upstream sync and the included platform, CI, contract, mobile, and desktop changes.
Description check	✅ Passed	The description clearly lists the changes, fork-specific deviations, and verification results, so it is mostly complete despite omitting template headings and the checklist.

✨ Finishing Touches 💡 2

📝 Generate docstrings 💡

• Create stacked PR
• Commit on current branch

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/sync-20260806-l1-platform-ci-63f7

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[coderabbitai]

Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/workflows/mobile-eas-preview.yml:
- Around line 5-20: Update the workflow triggers to include unlabeled events,
and move the mobile preview concurrency configuration from the preview job to
workflow scope so label removal cancels any active run even when the preview job
is skipped. Preserve the existing concurrency group value and cancellation
behavior, and keep the preview job’s label gating unchanged.

In `@docs/operations/mobile-app-store-screenshots.md`:
- Around line 46-47: Update the Metro startup command in the --skip-metro
instructions to use APP_VARIANT=production instead of APP_VARIANT=development,
keeping the documented reuse-capture flow aligned with the production prebuild.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ec414128-c181-4894-96e7-e96d1ede17d2

📥 Commits

Reviewing files that changed from the base of the PR and between 606bb3f and 7d99330.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (79)

• .agents/skills/test-t3-mobile/SKILL.md
• .github/ISSUE_TEMPLATE/bug_report.yml
• .github/ISSUE_TEMPLATE/feature_request.yml
• .github/workflows/ci.yml
• .github/workflows/deploy-relay.yml
• .github/workflows/mobile-eas-preview.yml
• .github/workflows/mobile-eas-production.yml
• .github/workflows/mobile-showcase-screenshots.yml
• .github/workflows/release.yml
• apps/desktop/src/app/DesktopAppIdentity.test.ts
• apps/desktop/src/app/DesktopAppIdentity.ts
• apps/desktop/src/app/DesktopClerk.test.ts
• apps/desktop/src/app/DesktopClerk.ts
• apps/desktop/src/app/DesktopLifecycle.test.ts
• apps/desktop/src/electron/ElectronApp.test.ts
• apps/desktop/src/electron/ElectronApp.ts
• apps/desktop/src/telemetry/DesktopTelemetryPublisher.test.ts
• apps/desktop/src/window/DesktopApplicationMenu.test.ts
• apps/mobile/app.config.ts
• apps/mobile/package.json
• apps/mobile/src/Stack.tsx
• apps/mobile/src/components/CompactBrandTitle.tsx
• apps/mobile/src/components/ProjectFavicon.tsx
• apps/mobile/src/components/projectFaviconCache.test.ts
• apps/mobile/src/components/projectFaviconCache.ts
• apps/mobile/src/features/connection/pairing.test.ts
• apps/mobile/src/features/connection/pairing.ts
• apps/mobile/src/features/home/HomeHeader.tsx
• apps/mobile/src/features/home/HomeRouteScreen.tsx
• apps/mobile/src/features/threads/NewTaskDraftScreen.tsx
• apps/mobile/src/features/threads/new-task-flow-provider.tsx
• apps/mobile/src/features/threads/sidebar-navigation-shell.tsx
• apps/mobile/src/features/threads/thread-list-items.tsx
• apps/mobile/src/lib/composerImages.ts
• apps/mobile/src/lib/layoutMetrics.ts
• apps/mobile/src/lib/mobileBranding.test.ts
• apps/mobile/src/lib/mobileBranding.ts
• apps/mobile/src/lib/modelOptions.test.ts
• apps/mobile/src/lib/modelOptions.ts
• apps/mobile/src/native/StackHeader.tsx
• apps/mobile/src/native/T3ComposerEditor.native.tsx
• apps/mobile/src/state/use-composer-drafts.test.ts
• apps/mobile/src/state/use-composer-drafts.ts
• apps/server/src/assets/AssetAccess.test.ts
• apps/server/src/assets/AssetAccess.ts
• apps/server/src/vcs/GitVcsDriverCore.test.ts
• apps/server/src/vcs/GitVcsDriverCore.ts
• apps/web/src/components/ChatView.tsx
• apps/web/src/components/ProjectFavicon.test.tsx
• apps/web/src/components/ProjectFavicon.tsx
• apps/web/src/components/Sidebar.tsx
• apps/web/src/components/desktopUpdate.logic.test.ts
• apps/web/src/components/desktopUpdate.logic.ts
• apps/web/src/components/desktopUpdate.toast.test.tsx
• apps/web/src/components/desktopUpdate.toast.tsx
• apps/web/src/components/sidebar/SidebarUpdatePill.tsx
• apps/web/src/index.css
• docs/operations/mobile-app-store-screenshots.md
• docs/user/remote-access.md
• oxlint-plugin-t3code/test/utils.ts
• packages/client-runtime/src/rpc/session.test.ts
• packages/contracts/src/baseSchemas.ts
• packages/contracts/src/keybindings.test.ts
• packages/contracts/src/keybindings.ts
• packages/contracts/src/server.test.ts
• packages/contracts/src/server.ts
• packages/shared/src/projectFavicon.test.ts
• packages/shared/src/projectFavicon.ts
• packages/shared/src/schemaJson.test.ts
• packages/shared/src/schemaJson.ts
• packages/shared/src/semver.test.ts
• packages/shared/src/semver.ts
• pnpm-workspace.yaml
• scripts/build-desktop-artifact.test.ts
• scripts/build-desktop-artifact.ts
• scripts/mobile-showcase-environment.ts
• scripts/mobile-showcase.config.ts
• scripts/mobile-showcase.test.ts
• scripts/mobile-showcase.ts

💤 Files with no reviewable changes (7)

• apps/desktop/src/telemetry/DesktopTelemetryPublisher.test.ts
• apps/desktop/src/app/DesktopAppIdentity.test.ts
• apps/desktop/src/app/DesktopLifecycle.test.ts
• apps/desktop/src/electron/ElectronApp.ts
• apps/mobile/src/lib/composerImages.ts
• apps/desktop/src/electron/ElectronApp.test.ts
• apps/desktop/src/window/DesktopApplicationMenu.test.ts