fix(mobile): keep ordinary offline outbox failures out of console.warn

[juliusmarminge]

The problem

Audit #17 (mobile): 83 console.* calls with no filterable debug layer. state/use-thread-outbox-drain.ts alone has 13 console.warn call sites and they fire on ordinary offline operation — while the device is offline or a socket drops mid-request, every backoff retry printed warnings per message, burying actionable output. features/cloud/cloudDebugLog.ts and features/terminal/terminalDebugLog.ts were near-identical hand-rolled helpers gated on __DEV__ or a globalThis.__T3_*_DEBUG__ flag.

The fix

A small filterable debug log (apps/mobile/src/lib/debugLog.ts): namespaced logger, [t3-<namespace>] prefix, same style as the existing cloud/terminal logs. Silent everywhere by default (including dev builds, so the ordinary-offline paths stop being noise) and filterable from a JS debugger / Metro console even on release/TestFlight builds:

• globalThis.__T3_DEBUG__ = true — all namespaces
• globalThis.__T3_DEBUG__ = ["thread-outbox"] — only listed namespaces

Dev-enabled subsystems opt in with enabledInDev; the legacy __T3_CLOUD_DEBUG__ / __T3_TERMINAL_DEBUG__ globals keep working. cloudDebugLog and terminalDebugLog — the exact duplicates the audit names — are now thin wrappers over the shared logger; behavior unchanged.

Outbox drain de-noised by outcome, not blanket-suppressed:

• The delivery-failure logger takes the raw failure (stage, error, interrupted), classifies it with the real resolveThreadOutboxFailureAction, and returns the retry-or-restore decision to the caller. Ordinary transport retries — what an offline device or flapping socket produces on every backoff attempt — go to the [t3-thread-outbox] debug log, including retryable attachment-upload failures.
• Settings-sync caveat: resolveThreadOutboxFailureAction always returns retry for settings-sync, even for server-decided/authorization rejections, so a queued message could retry forever with no warning. The error itself (via shouldRetryThreadOutboxDelivery), not the resolved action, decides the log level there: nontransport settings-sync failures keep console.warn. The same error-inspection rule excludes RpcClientError client-side protocol/decode defects (RpcClientDefect) from the debug path — they retry, but an abnormal server response keeps console.warn. (On this queued-request path the RPC client reports ordinary drops as raw socket/worker reason tags and reserves the defect tag for protocol/decode failures; the shared subscription stream's re-wrapping of transport causes under that tag does not reach this logger — noted in the code comment.)
• Everything else stays on console.warn: server-decided restores (user-visible error), post-delivery sign-out snapshot, delivered/acknowledged message removal, composer handoff, recovery rollback, undeliverable-restore, and missing-thread/project removal failures — abnormal local-storage or user-data-loss paths that cannot self-heal. The one expected outcome, losing the cleanup race to a user edit the caller already handles, moved to debug.

Verification

Not a visual change; screenshots do not apply. Focused logging-behavior tests existed during review (classification tests for offline-retry silence, settings-sync and decode-defect warnings, upload context) and passed locally, but were removed per maintainer request to keep this small concern test-light. Kept verification:

 Test Files  16 passed (16)   # existing outbox drain, features/cloud, features/terminal
      Tests  98 passed (98)   # no regressions to the outbox delivery/cleanup behavior

tsc --noEmit (apps/mobile) clean; vp lint on all changed files clean (one pre-existing exhaustive-effect-dependencies warning exists identically on the base).

Scope (deliberately not a complete mobile logging layer)

• The audit also counts ~50 web and ~6 server console.* calls. The named noise is mobile-only; web/server sites are ordinary diagnostics and converting them is follow-up work. I first tried hosting the logger in packages/client-runtime for cross-surface adoption, but its typecheck bans console.* (Effect globalConsole diagnostic) and does not declare __DEV__ — the mechanism belongs at the app surface.
• Five other hand-rolled __DEV__ console loggers remain (features/review/* with a word-for-word duplicated [review-sheet] diagnostic helper, agent-awareness/remoteRegistration.ts, lib/foundation-fast-refresh.ts). The review-file pair is a clean follow-up consolidation onto createDebugLogger("review-sheet"); those files are owned by concurrent shiki/review work, so they stay untouched here.
• The debug flag is debugger-driven, matching the existing cloud/terminal pattern; it is not wired into the diagnostics screen (also true of the existing flags).

_{Done by Apex by Callstack (pi harness).}

Summary by CodeRabbit

• Improvements
  • Standardized cloud and terminal diagnostic logging for more consistent troubleshooting.
  • Added namespace-based filtering and development-only controls for diagnostic output.
  • Improved failure reporting for queued message delivery and attachment uploads, including clearer context for response-decoding issues.
  • Expected message-edit cleanup races now produce quieter diagnostic output.
  • Retry and message restoration behavior remain unchanged.

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• apps/mobile/src/state/use-thread-outbox-drain.ts

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📝 Walkthrough

Walkthrough

The mobile app adds a shared namespace-based debug logger, adopts it for cloud and terminal diagnostics, and updates thread outbox failure logging to classify decode defects and include queued-message context.

Changes

Mobile debug logging

Layer / File(s)	Summary
Shared logger and subsystem adoption apps/mobile/src/lib/debugLog.ts, apps/mobile/src/features/cloud/cloudDebugLog.ts, apps/mobile/src/features/terminal/terminalDebugLog.ts	Adds createDebugLogger with development, legacy-flag, and namespace-filter enablement. Cloud and terminal logging delegate to the shared logger.
Retry-aware outbox failure logging apps/mobile/src/state/use-thread-outbox-drain.ts	Classifies RPC decode defects, adds queued-message identifiers to upload logs, changes expected cleanup races to debug logs, and preserves retry and restore handling.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Suggested reviewers: chrisdeeming

Merge Risk: ⚪ Minimal · up to c1108

The mobile logging change preserves actionable warnings and legacy diagnostics while making ordinary outbox retry output opt-in. No merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 26.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 15 functions across 6 files.	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 clearly summarizes the primary change: ordinary offline outbox failures no longer use console.warn.
Description check	✅ Passed	The description explains what changed, why it changed, verification results, UI applicability, and scope. It does not use the template headings or include the checklist, but the required information i…

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[github-actions]

Thread transfer impact

✅ Thread transfer remains within every enforced ceiling.

Provider	Metric	Main baseline	This PR	Impact	PR ceiling
Codex	Total thread wire	13.5 KiB	13.5 KiB	+26 B (+0.2%)	15.1 KiB	✅
Codex	Thread snapshot wire	7.0 KiB	7.1 KiB	+3 B (+0.0%)	7.3 KiB	✅
Codex	Live turn WebSocket wire	6.5 KiB	6.5 KiB	+23 B (+0.3%)	7.8 KiB	✅
Codex	Live turn WebSocket decoded	56.3 KiB	56.3 KiB	0 B (0.0%)	66.4 KiB	✅
Codex	Live turn messages	10	10	0 (0.0%)	21	✅
Claude	Total thread wire	13.5 KiB	13.5 KiB	+11 B (+0.1%)	15.1 KiB	✅
Claude	Thread snapshot wire	7.1 KiB	7.1 KiB	0 B (0.0%)	7.3 KiB	✅
Claude	Live turn WebSocket wire	6.4 KiB	6.4 KiB	+11 B (+0.2%)	7.8 KiB	✅
Claude	Live turn WebSocket decoded	57.0 KiB	57.0 KiB	0 B (0.0%)	66.4 KiB	✅
Claude	Live turn messages	9	9	0 (0.0%)	21	✅

Baseline: d7819c1 · PR result: c110833 · Source CI: success

Scenario and decoded snapshot size

10 historical turns, 5 command tools per turn, 878.9 KiB retained MCP result per historical turn, and a 1.05 MiB retained result in the measured turn.

• Codex decoded thread snapshot: 113.9 KiB
• Claude decoded thread snapshot: 114.6 KiB

Updated in place by a trusted workflow. PR artifacts are strictly validated and never executed.

[macroscopeapp]

Approvability

Verdict: Approved at c110833

Macroscope's review found this PR approvable — This is a contained mobile logging fix that suppresses expected offline retry noise while preserving warnings for actionable failures and leaving delivery behavior unchanged. The shared diagnostic logger is opt-in and does not alter product defaults, schemas, or deployment behavior.

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Actionable comments posted: 2

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Inline comments:
In `@apps/mobile/src/state/use-thread-outbox-drain.test.ts`:
- Line 440: In the test for completeQueuedMessageDelivery, move the
expect(warn).not.toHaveBeenCalled() assertion into the try block after the
delivery call and before warn.mockRestore(), so it checks the spy’s call history
before restoration clears it.

In `@apps/mobile/src/state/use-thread-outbox-drain.ts`:
- Around line 87-136: Update logThreadOutboxDeliveryFailure to distinguish
RpcClientError failures with reason RpcClientDefect from ordinary transport
retries, and send that defect to console.warn even when
resolveThreadOutboxFailureAction returns retry. Preserve debug logging for
ordinary offline retries and the existing warning behavior for server-decided
failures.

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• apps/mobile/src/lib/debugLog.ts
• apps/mobile/src/state/use-thread-outbox-drain.test.ts
• apps/mobile/src/state/use-thread-outbox-drain.ts

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[juliusmarminge]

Behavior choice (for the Approvability question)

Macroscope's "Not approved" verdict asks for a human call on suppressing ordinary offline transport warnings by default, including in dev builds. That default is deliberate and is the smallest model that fixes the audit:

• Why silent in dev too: the audit's complaint is the noise volume itself — during an offline period the drain retries with backoff per message, so a console.warn per retry buries everything else in the exact session where you are trying to read the log. Making the quiet path console.log instead would not reduce the volume, only its level.
• The signal is preserved, not removed: every debug line stays greppable via globalThis.__T3_DEBUG__ = true (or ["thread-outbox"]) from Metro/JS debugger, works on release/TestFlight builds, and keeps the full failure details including the Effect cause.
• Nothing server-decided is ever quiet: restores, nontransport settings-sync failures, and RPC response-decoding defects keep console.warn (all three paths have classification tests driving real tagged errors, not predetermined actions). Local-storage/user-data-loss warns are untouched. The only informational path moved to debug is losing the cleanup race to a user edit, which the caller handles by design.
• Blast radius: mobile outbox drain only. Cloud/terminal logger behavior is byte-for-byte unchanged; their existing globals keep working.

If a maintainer would rather ordinary offline retries stayed on console.log by default in dev builds, that is a one-line change (enabledInDev: true on the thread-outbox logger) — happy to flip it on request.

(@macroscopeapp[bot] the open Medium thread was fixed in 62eed73 / 34b6394; the suppress-by-default threshold question is above for a human.)

Dismissing prior approval to re-evaluate c110833