[JesstLe]

Problem

Refs https://git.cafe/pingdotgg/t3code/issues/26341. Windows completion notifications deliberately use requireInteraction to retain clicks after timeout, but that keeps the banner on screen until dismissed. Removing the flag alone would restore the previous Notification Center click regression.

Change

Use Electron 44's main-process notifications for Windows desktop, with normal timeout and a versioned, bounded XML launch destination containing environment/thread and a notification nonce. Native live clicks and Notification.handleActivation converge on one deduplicated navigation path. Early activation waits for renderer readiness; reload/crash detaches readiness; activation reveals or creates the window before delivery.

The native object is retained after timedOut, so normal focus/settings cleanup can still close its Action Center item. Replacement and close target the exact nonce. Quit cleanup retains system notices so their embedded destination can be used after restart. Main-renderer-only IPC validates payloads; text is XML-escaped and sanitized. Older desktop bridges, other platforms and ordinary browsers retain their existing notification path.

Scope and approval

One Windows notification lifecycle problem. Related investigation: #26341 (comment) . That community comment proposes this approach; it is not maintainer approval. No separate maintainer direction/scope approval for this implementation has been obtained. This remains a draft pending maintainer assessment and the missing installed-Windows evidence below; draft status is not presented as an exemption from contribution triage.

The focus-restoration contribution is independent and is not in this diff. No model/provider or mobile notification behavior is changed.

Verification

Base 30654b3e91a51937d1dba18fc83af19d8003f5ca; Windows x64, Node 26.12.1, pnpm 12.14.0, Electron 44.10.0 types and native source checked.

• Browser regression added before production changes: vp test run apps/web/src/components/ThreadNotificationCoordinator.badge.browser.test.ts -t "uses native Windows completion" failed (native show received zero calls, exit 1).
• vp test run apps/desktop/src/app/DesktopThreadNotifications.test.ts apps/desktop/src/ipc/methods/threadNotifications.test.ts apps/desktop/src/ipc/methods/notificationBadge.test.ts apps/web/src/components/ThreadNotificationCoordinator.badge.browser.test.ts apps/web/src/components/ThreadNotificationCoordinator.logic.test.ts --maxWorkers=1: 26 passed in 5 files.
• Final integrated focused run with the separate focus change: 98 passed in 9 files, exit 0. Mock-native tests cover normal timeout options, XML escaping, both click callbacks, duplicate delivery, cold activation queuing, renderer reload, malformed destinations, replacement/stale close, quit retention, wrong IPC sender, oversized input, settings-off cleanup and non-Windows behavior. These are not Windows OS acceptance tests.
• Contracts/Web/Desktop typecheck: 3/3 successful, exit 0. Targeted lint and format, changed React Compiler cases, official knip checks and git diff --check passed. Web production build and desktop vp pack passed (existing bundler warnings).
• vp run check:changed origin/main --concurrency 1 was attempted but stopped in the ignored-file Git input scan before executing check steps. Not reported as passing; focused checks were run separately.
• Copy-only rollback restored all 11 paths to their baseline hashes/absence, retained the modified feature checkout, and passed the original baseline selection (34 tests).

Missing native evidence — not ready for merge

The isolated official Electron runtime was downloaded and the app bundle built. Launching the independent test client was rejected by the execution tool (rejected: blocked by policy), including after user confirmation. No existing/live T3 instance was replaced or restarted, and no launch bypass was attempted.

Not verified: actual Windows banner expiration; Action Center click after timeout; click after app restart; Do Not Disturb behavior; first-render routing after cold OS activation. No before/after native screenshot or recording is available. The user explicitly accepted submitting this implementation with native acceptance marked pending.

Electron 44's Windows notification history enumeration/removal APIs are empty/no-op implementations; this code does not pretend to enumerate or clear all notices from earlier processes. A clicked old notice carries its own destination. End-to-end COM/single-instance behavior still requires an installed Windows build.

Model: gpt-6-astra (ultra). Harness: Codex through T3 Code.

Fixes #26341

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Walkthrough

This PR adds Windows native thread notifications to the desktop bridge. It validates notification payloads, routes show, close, and readiness calls through IPC, and delivers activations to the renderer. The web coordinator uses native delivery when available and retains the browser notification fallback.

Changes: Windows thread notifications

Layer / File(s)	Summary
Notification contract and IPC bridge packages/contracts/src/ipc.ts, apps/desktop/src/ipc/channels.ts, apps/desktop/src/ipc/methods/threadNotifications.ts, apps/desktop/src/ipc/DesktopIpcHandlers.ts, apps/desktop/src/preload.ts, apps/desktop/src/main.ts, apps/desktop/src/ipc/methods/threadNotifications.test.ts, apps/desktop/src/app/DesktopApp.test.ts	Adds schemas for notification targets and payloads, IPC methods with sender checks, preload bridge methods, and desktop application registration. Tests cover sender validation, payload limits, and startup wiring.
Native notification lifecycle apps/desktop/src/app/DesktopThreadNotifications.ts, apps/desktop/src/app/DesktopThreadNotifications.test.ts	Adds Windows notification display, replacement and closure, activation handling, renderer readiness, and cleanup. Tests cover timeout behavior, activation validation and delivery, replacement, shutdown, and non-Windows behavior.
Web coordinator integration apps/web/src/components/ThreadNotificationCoordinator.tsx, apps/web/src/components/ThreadNotificationCoordinator.badge.browser.test.ts	Uses the native bridge for Windows notifications when its methods are available. Handles activation navigation and falls back to browser notifications when native delivery fails. Tests cover fallback delivery, stale results, and changes to notification availability.

Estimated code review effort: 4 (Complex) | ~45 minutes

Change: Bug fix · Severity of issue fixed: Low

Sequence Diagram(s)

sequenceDiagram
  participant ThreadNotificationCoordinator
  participant desktopBridge
  participant threadNotificationsIPC
  participant DesktopThreadNotifications
  participant ElectronNotification
  ThreadNotificationCoordinator->>desktopBridge: showThreadNotification
  desktopBridge->>threadNotificationsIPC: invoke show
  threadNotificationsIPC->>DesktopThreadNotifications: show validated notification
  DesktopThreadNotifications->>ElectronNotification: create toast
  ElectronNotification-->>DesktopThreadNotifications: activation target
  DesktopThreadNotifications->>desktopBridge: send activation target to renderer
  desktopBridge->>ThreadNotificationCoordinator: notify activation listener
  ThreadNotificationCoordinator->>ThreadNotificationCoordinator: navigate to target thread

Loading

Possibly related PRs

• pingdotgg/t3code#22458: Changes the same coordinator and supplies completion notices consumed by this PR’s native delivery path.
• pingdotgg/t3code#31932: Changes the notification-tag helper used by the coordinator; native notification identity and replacement tracking use that tag.
• pingdotgg/t3code#24493: Changes which thread alerts the coordinator emits after environment reconnects; this PR adds native delivery for those alerts.

Suggested labels: bugfix

Suggested reviewers: juliusmarminge

Merge Risk: Minimal · up to 7573f

Windows thread notifications now use the native path with a browser fallback, and no actionable merge-blocking issue remains in this review. Native Windows acceptance testing is still pending and should be done before release.

Pre-merge checks: 3 · 1

Failed checks: 1 inconclusive

Check name	Status	Explanation	Resolution
Linked Issues check		Issue #26341 requires Windows desktop completion notifications to time out. The native path sets Electron timeoutType: "default" and omits reminder behavior. Mock tests verify those options and acti…	Provide installed-Windows evidence that completion notifications expire normally while activation remains functional after timeout.

Passed checks: 3 passed

Check name	Status	Explanation
Title check		The title clearly identifies the Windows thread-notification change and the goal of preserving activation while allowing notifications to expire.
Description check		The description covers the Problem, Change, Scope and approval, and Verification sections with specific implementation details and test results. It also clearly states that maintainer approval and ins…
Out of Scope Changes check		The changes add the Windows desktop notification path and its IPC, routing, validation, lifecycle handling, and tests. These changes support issue #26341. The diff does not show unrelated model, provi…

Full details: Description check

Explanation

The description covers the Problem, Change, Scope and approval, and Verification sections with specific implementation details and test results. It also clearly states that maintainer approval and installed-Windows acceptance evidence are still pending.

Full details: Out of Scope Changes check

Explanation

The changes add the Windows desktop notification path and its IPC, routing, validation, lifecycle handling, and tests. These changes support issue #26341. The diff does not show unrelated model, provider, mobile, or focus-restoration changes.

Full details: Linked Issues check

Explanation

Issue #26341 requires Windows desktop completion notifications to time out. The native path sets Electron timeoutType: "default" and omits reminder behavior. Mock tests verify those options and activation handling. The PR reports that installed-Windows banner expiration and activation were not tested, so the required OS behavior is not established.

Resolution

Provide installed-Windows evidence that completion notifications expire normally while activation remains functional after timeout.

Finishing Touches

Generate unit tests (beta)

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Files selected for processing: 6

• apps/desktop/src/app/DesktopApp.test.ts
• apps/desktop/src/ipc/DesktopIpcHandlers.ts
• apps/desktop/src/preload.ts
• apps/web/src/components/ThreadNotificationCoordinator.badge.browser.test.ts
• apps/web/src/components/ThreadNotificationCoordinator.tsx
• packages/contracts/src/ipc.ts

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Actionable comments posted: 1

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Prompt to fix all issues

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @apps/web/src/components/ThreadNotificationCoordinator.tsx:
- Around line 234-242: Update the native notification result and error handlers
to try the existing browser Notification path when delivery returns false or
rejects and browser permission is granted. Keep the pending-entry identity check
so fallback applies only to the current notification, and remove it from pending
only after the fallback is handled or unavailable.

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• apps/web/src/components/ThreadNotificationCoordinator.tsx

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[mynameistito]

Hey @JesstLe ty for the PR!

I just tested it locally on my machine and works as intended. :)

Hopefully this gets a wee merge lol

Also, it might be a good shot adding a video of it in work and klike a wee before and after.

[matej-kaska]

Would love if this gets merged... Its pretty annoying...

[maria-rcks]

Note

Written by claude-opus-5-5 on behalf of Maria

Merged current main into this branch (merge commit 7573ff4, no rebase). The only conflict was in ThreadNotificationCoordinator.badge.browser.test.ts: kept both the native Windows notification tests from this PR and main's new monitor final-wake test, and switched one dynamic fakeTimers import to the static import main now has. No other changes.

vp run check:changed passes (format, lint, knip, typecheck, 6 test files). The earlier CodeRabbit fallback finding is already covered by the falls back to a tracked browser notification cases.