fix(mobile): threads on an unreachable environment no longer hide in the Working shelf#26008

open6
main
GitHub fork: fix/mobile-stale-working-disconnected
opened4d agobySsaphid
View on GitHubTwo-way sync enabledPR last imported 10h ago

Problem

With the mobile Working shelf on, a thread whose environment has stopped answering keeps the running state it had when the connection dropped. It stays folded into the collapsed Working shelf indefinitely, so a broken thread is hidden behind a section the user has no reason to open.

Repro: turn on the Working shelf and collapse it, start a turn on a remote environment, then make that host unreachable (power it off, or block its port). The thread stays in the collapsed shelf for as long as the host is down.

Before: two threads on an unreachable environment (lxso2) still read Working 10h 35m and 10h 43m and sit under the collapsed Working shelf

Change

buildThreadListV2Items leaves a thread out of the Working shelf when its environment is disconnected, so the thread is listed in the inbox where it can be seen. Once the environment reconnects and reports the thread running, it goes back into the shelf.

An environment counts as disconnected past a first connection attempt (reconnecting, offline, error, unsupported, available), the rule threadRouteIsHydrating already uses. A first connecting attempt keeps the cached state, so a cold start or resume doesn't move every running thread out of the shelf and back. Connected environments with cached or synchronizing shells also remain outside the shelf until synchronization succeeds. useThreadListV2 observes connection phases and shell-status atoms, derives the disconnected environment IDs, and passes them to the builder. The set keeps its identity until its members change.

Scope and approval

This is a small, focused fix for an obvious bug: a collapsed shelf hides a thread whose state is unknown. It is related to #25449 and complements #25471. That PR relabels stale Working rows as Reconnecting/Offline and deliberately keeps shelf placement. This PR changes placement only, not labels, and is independent of it. Each lands on its own, and they don't conflict.

Mobile only. The web sidebar's Working section has the same placement question; it is left for a separate change if maintainers want it.

Verification

  • New test in threadListV2.test.ts, which fails on main: a running thread on a disconnected environment is listed outside the Working shelf, while working threads on a connected environment stay in it. A table test covers each connection phase in isThreadListV2EnvironmentDisconnected.
  • vp run check:changed passed on 57c5ad5698: format, lint, knip, typecheck (mobile and scripts), 78 focused tests across the thread-list and key-set suites, and React compiler checks. The phase table also covers connected shells awaiting synchronization and preserves the first connecting attempt exemption.
  • The iOS captures below are from bbd678e. Native verification has not been repeated for the latest head because Agent device access is disabled in this environment.
  • iOS Simulator (iPhone 17 Pro, iOS 27.0, dark), T3 Code Dev client on Metro, paired to an isolated dev server with its own .t3 state seeded from a copy of real data. Two real Codex turns were started that run sleep 900, so both threads were genuinely running and sat in the collapsed Working shelf. The dev server was then stopped mid-turn, so the app showed "Reconnecting to …". The same app and session were captured with main's threadListV2.ts and useThreadListV2.ts (left), then with this branch at bbd678e (right):

Left, main: with the environment reconnecting, both running threads stay hidden in the collapsed Working (2) shelf. Right, this branch: the shelf is gone and both threads are listed in the inbox

The rows still read "Working 8m". This PR changes placement only; #25471 replaces that label with Reconnecting/Offline.

Prepared with Claude Opus 5.5 in Claude Code, running in T3 Code.

🤖 Generated with Claude Code

Checks

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Findings

Minor Wait for shell synchronization before returning threads to the shelf. External image

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5
6Inline comments:
7Review comments at @apps/mobile/src/features/threads/useThreadListV2.ts:
8- Line 62: Update the disconnected-environment classification in the thread-list
9filtering flow to account for shell readiness after a disconnect. Do not return
10threads to the collapsed Working shelf while the shell still has a cached
11snapshot; preserve them until shell synchronization succeeds, including when
12synchronization fails.

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Reviewing files that changed from the base of the PR and between a619829e2576e0925fa13761d280b45a6b4abf38 and 2984931816e5dcdce6a474de47c98c91ed56e95b.

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  • apps/mobile/src/features/threads/useKeySet.test.tsx
  • apps/mobile/src/features/threads/useKeySet.ts
  • apps/mobile/src/features/threads/useThreadListV2.ts
  • apps/mobile/vite.config.ts

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Walkthrough

The mobile thread list identifies disconnected workspace environments and excludes their working threads from the Working shelf. Those threads follow the existing active-thread path. The thread-list hook uses a shared key-set hook for disconnected environment IDs and content-only thread keys.

Changes: Disconnected environment classification

Layer / File(s)Summary
Classify disconnected threads
apps/mobile/src/features/threads/threadListV2.ts, apps/mobile/src/features/threads/threadListV2.test.ts
The builder accepts disconnected environment IDs and excludes matching threads from the Working shelf. Tests cover the connection phases classified as disconnected and verify that a disconnected working thread remains listed.
Pass disconnected environment IDs
apps/mobile/src/features/threads/useThreadListV2.ts
The hook collects disconnected environment IDs from workspace environments and passes them to the builder. It also uses useKeySet for content-only thread keys.
Memoize key sets
apps/mobile/src/features/threads/useKeySet.ts, apps/mobile/src/features/threads/useKeySet.test.tsx, apps/mobile/vite.config.ts
The shared hook sorts and serializes keys to memoize a Set. The React test checks key preservation and set identity. Vite routes the test to the React project.

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

Possibly related issues

  • pingdotgg/t3code#25449 — This change moves disconnected working threads out of the mobile Working shelf. It does not change row labels or timers, or address the web sidebar.
  • pingdotgg/t3code#24530 — This change moves threads from offline environments out of the mobile Working shelf. It does not add a stale or offline indicator.

Possibly related PRs

  • pingdotgg/t3code#25471: Adds connection phases to cached thread-shell state, which this change uses to identify disconnected environments.
  • pingdotgg/t3code#24760: Defines mobile Working-shelf classification, which this change extends with a disconnected-environment condition.
  • pingdotgg/t3code#26195: Applies the disconnected-environment rule to the web sidebar; this change implements corresponding mobile behavior.

Suggested reviewers: juliusmarminge, t3dotgg

Merge Risk: External image Low · up to 29849

Reconnecting can hide a stale thread in the collapsed shelf before its current state is known. The change is mergeable with this limitation acknowledged.

Pre-merge checks: Passed 4
Check nameStatusExplanation
Title checkPassedThe title is concise, specific, and accurately describes the main mobile thread-placement fix for unreachable environments.
Linked Issues checkPassedCheck skipped because no linked issues were found for this pull request.
Out of Scope Changes checkPassedCheck skipped because no linked issues were found for this pull request.
Description checkPassedThe description is complete and follows the required template. It explains the problem and reproduction, describes the mobile-only change and scope, links related issue and PR context, documents focus…
Full details: Description check

Explanation

The description is complete and follows the required template. It explains the problem and reproduction, describes the mobile-only change and scope, links related issue and PR context, documents focused tests and reported results, includes before/after UI evidence, states verification limitations, and identifies the agent and harness used.

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  • 🪄 Fix comments: Fix CodeRabbit comments on this PR
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6Inline comments:
7Review comments at @apps/mobile/src/features/threads/thread-list-v2-items.tsx:
8- Line 689: Update both RowPressable accessibility labels in rowContent to
9include “Disconnected” when status is “disconnected,” while preserving the
10thread title and optional queued-message text.
11
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Reviewing files that changed from the base of the PR and between 36d4d711b79c73eb33131944f73ea4a8c6156484 and 6a131922e5e5e82ab972f70ebf1a9404bf324558.

External image Files selected for processing: 6
  • apps/mobile/src/features/home/HomeScreen.tsx
  • apps/mobile/src/features/threads/ThreadNavigationSidebar.tsx
  • apps/mobile/src/features/threads/thread-list-v2-items.tsx
  • apps/mobile/src/features/threads/threadListV2.test.ts
  • apps/mobile/src/features/threads/threadListV2.ts
  • apps/mobile/src/features/threads/useThreadListV2.ts

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apps/mobile/src/features/threads/thread-list-v2-items.tsxline 689Outdated · 6a13192Open thread
……@@ -679,7 +686,7 @@ export const ThreadListV2Row = memo(function ThreadListV2Row(props: {
680687 const rowAppearance = getThreadListV2RowAppearance(theme, sidebarPane, selected);
681688
682- const status = resolveThreadListV2Status(thread);
689+ const status = resolveThreadListV2Status(thread, { disconnected: props.disconnected === true });
CcoderabbitaiBoton line 6894d ago

External image Minor · Functional Correctness · Quick win

External image Supported by static analysis

Script executed:

bash
1rg -n 'accessibilityLabel|RowPressable|statusLabel|status ===|ThreadListV2Status' apps/mobile/src/features/threads/thread-list-v2-items.tsx apps/mobile/src/components/RowPressable.tsx
2sed -n '660,810p' apps/mobile/src/features/threads/thread-list-v2-items.tsx
3sed -n '1,115p' apps/mobile/src/components/RowPressable.tsx

Repository: pingdotgg/t3code

Length of output: 12155


Script executed:

bash
1set -o pipefail
2printf '%s\n' '--- ThreadListV2Row status and accessibility blocks ---'
3nl -ba apps/mobile/src/features/threads/thread-list-v2-items.tsx | sed -n '1080,1325p'
4printf '%s\n' '--- RowPressable import and implementation ---'
5rg -n -F -- 'export' apps/mobile/src/components/ui/RowPressable.tsx
6nl -ba apps/mobile/src/components/ui/RowPressable.tsx | sed -n '1,180p'

Repository: pingdotgg/t3code

Length of output: 12503


Include “Disconnected” in the row accessibility label.

When status is "disconnected", the row renders “Disconnected”, but both RowPressable labels contain only the thread title and optional queued-message text. RowPressable does not announce child text separately.

Suggested fix
diff
1+ const rowAccessibilityLabel = [
2+ thread.title,
3+ ...(status === "disconnected" ? ["Disconnected"] : []),
4+ ...(props.hasQueuedMessages ? ["messages queued to send"] : []),
5+ ].join(", ");
6+
7 const rowContent = (close: () => void) =>
8...
9- accessibilityLabel={
10- props.hasQueuedMessages ? `${thread.title}, messages queued to send` : thread.title
11- }
12+ accessibilityLabel={rowAccessibilityLabel}
13...
14- accessibilityLabel={
15- props.hasQueuedMessages ? `${thread.title}, messages queued to send` : thread.title
16- }
17+ accessibilityLabel={rowAccessibilityLabel}
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3only still-valid issues, skip the rest with a brief reason, keep changes
4minimal, and validate.
5
6Review comment at @apps/mobile/src/features/threads/thread-list-v2-items.tsx at
7line 689:
8Update both RowPressable accessibility labels in rowContent to include
9“Disconnected” when status is “disconnected,” while preserving the thread title
10and optional queued-message text.
11
12After applying the fix, consider running `coderabbit review --agent` for local
13review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr

Not changing this here. The row's accessibility label leaves out every status, not just the new one: Working, Approval, Input, Failed and Limited aren't announced either. Adding only Disconnected would make it the one status VoiceOver reads, and announcing row status for all of them is a separate accessibility fix with its own scope. This PR keeps the existing label pattern.

@saphid Agreed. Both row variants omit all statuses from their accessibility labels. This PR preserves that pattern, so I withdraw the request to announce only “Disconnected.”

Would you like a follow-up issue for consistent row-status announcements across all statuses?

✅ Review thread resolved.

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Update: the Disconnected row label has been removed from this PR. It now changes only shelf placement. Row status for unreachable environments is handled in #25471, so this comment no longer applies to the diff.

@saphid Understood. With the Disconnected row label removed, this finding no longer applies. I withdraw it. Row-status handling remains separate in #25471.

✅ Review thread resolved.

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Approvability

Verdict: Approved at 57c5ad5

Macroscope's review found this PR approvable — Threads on unreachable or unsynchronized environments remain visible outside the mobile Working shelf. This is a limited presentation change that preserves existing preferences and does not alter stored threads or remote execution.

You can add or adjust custom eligibility rules. Learn more.

Added 1 commit

  • fix(mobile): threads on an unreachable environment no longer hide in the Working shelfbbd678e
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Actionable comments posted: 1


  • 🪄 Fix comments: Fix CodeRabbit comments on this PR
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5
6Inline comments:
7Review comments at @apps/mobile/src/features/threads/threadListV2.ts:
8- Line 712: Update the inbox-move branch around isDisconnected(thread) to carry
9the disconnected status through ThreadListV2Item into ThreadListV2Row, so the
10row displays Disconnected rather than the cached Working or Waiting state;
11suppress the duration when the resolved status is Disconnected.
12
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Reviewing files that changed from the base of the PR and between 6a131922e5e5e82ab972f70ebf1a9404bf324558 and bbd678e3e28e534ee62cc78bec8ec9c0f84a3006.

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  • apps/mobile/src/features/threads/threadListV2.test.ts
  • apps/mobile/src/features/threads/threadListV2.ts

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apps/mobile/src/features/threads/threadListV2.tsline 712Outdated · bbd678eOpen thread
……@@ -692,7 +706,12 @@ export function buildThreadListV2Items(input: {
709+ } else if (
710+ workingShelfEnabled &&
711+ // A shelf the user collapsed must not hide a thread whose progress is unknown.
712+ !isDisconnected(thread) &&
CcoderabbitaiBoton line 7124d ago

External image Major · Functional Correctness · Heavy lift

Pass the disconnected state to the row before moving the thread into the inbox.

When this branch moves a running thread out of the Working shelf, the resulting ThreadListV2Item still contains only the cached thread state. ThreadListV2Row resolves that state as Working or Waiting and continues to render its duration. The thread is visible in the inbox, but it does not display Disconnected as this fix requires. Carry the disconnected flag through the item and row, then suppress the duration for that status. (raw.githubusercontent.com)

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4minimal, and validate.
5
6Review comment at @apps/mobile/src/features/threads/threadListV2.ts at line 712:
7Update the inbox-move branch around isDisconnected(thread) to carry the
8disconnected status through ThreadListV2Item into ThreadListV2Row, so the row
9displays Disconnected rather than the cached Working or Waiting state; suppress
10the duration when the resolved status is Disconnected.
11
12After applying the fix, consider running `coderabbit review --agent` for local
13review. Visit https://docs.coderabbit.ai/cli?utm_source=ghpr

Leaving this out on purpose. This PR only changes where the thread is listed. The row's status for an unreachable environment, including hiding the running timer, is handled in #25471, which shows Reconnecting/Offline instead of Working and drops the timer. The two PRs touch separate lines and merge cleanly together. Adding a second label here would duplicate #25471 and conflict with it. Until #25471 lands, the thread is still visible in the inbox, which is what this PR fixes.

@saphid Understood. This PR changes inbox placement; the row-status and timer changes belong to #25471. I incorrectly treated those separate changes as a requirement for this PR. I withdraw this finding; no duplicate row-status implementation is needed here.

✅ Review thread resolved.

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Note

Written by gpt-6.1-sol on behalf of Maria

Verified in a real dev environment

no changed behavior could be verified on this linux vm. i read the description, complete diff and review discussion at bbd678e3e28e534ee62cc78bec8ec9c0f84a3006. the pr is open and has no commits by juliusmarminge or t3dotgg. its scope is mobile shelf placement; row labels and timers are explicitly separate work.

the native device capability check returned Agent device access is turned off for this environment. timeout 20 adb devices -l listed no devices. capability-check transcript.

Not verified

main reproduction, the pr fix, and neighboring behavior remain unverified. this change runs in the native mobile home/sidebar list, not the web list, so a chrome session or server-only codex turn would not exercise it. the repository mobile verification skill requires stopping when device access is unavailable. no dev servers, provider turns, screenshots or recordings were produced; no code was changed or pushed.

verification still needs a native client: enable and collapse the Working shelf, start a real codex gpt-6.1-sol turn, disconnect its environment, confirm the thread leaves the shelf, reconnect and confirm the running thread returns. also check connected running threads stay shelved, first-connection hydration does not move cached threads, and shelf-disabled behavior remains unchanged. repeat the disconnect on main first.

stored ci reports 32 successful checks, zero failing or pending. that does not prove runtime behavior. result: unverifiable on this vm.

Note

Written by gpt-6.1-sol on behalf of Maria

Verified on Android emulator (API 35) against a real dev server

tested head bbd678e3e28e534ee62cc78bec8ec9c0f84a3006 on the t3 android emulator with the matching cached development client, metro on port 8081, and an isolated dev server on port 13773. created a real project and two real codex gpt-6.1-sol turns through the local proxy; both executed long-running shell commands. no mocks or demo data.

  • reproduced the original bug using the two shelf modules from the pr's parent: after pausing the server until the client reported reconnecting, the running thread remained hidden in collapsed working (1).
  • restored the exact pr modules and restarted metro. the same cached running thread appeared in the inbox while the server remained unreachable.
  • repeated the disconnect with two running threads on the exact head. both left the collapsed shelf when reconnecting. resuming the server returned both to collapsed working (2); expanding it showed both running threads.
  • disabled the working section in settings. both threads stayed visible when connected and when reconnecting.
  • blacksmith: all 71 existing threadListV2.test.ts cases passed on the exact head. the new disconnected-thread case failed with the pre-fix modules. stored ci reports 32 successful checks, zero failing or pending.

no code changes or pushes were needed. the cached working labels remain unchanged, as intended by this placement-only pr.

before: pre-fix modules hide the disconnected running thread in collapsed working (1)

after: the same running thread is visible in the inbox while reconnecting on the pr head

android recording: collapse the working shelf, lose the server connection, and see both real running threads return to the inbox

Not verified

ios cannot run on this linux vm. a full current github/main checkout was not exercised; the before capture uses the pr parent's two shelf modules. simultaneous connected and disconnected environments, first-connection hydration, relay/tunnel routing, and the in-thread navigation sidebar were not exercised. this pass verifies the native android home list and reconnect behavior, not those additional paths.

Added 2 commits

  • Merge commit '961026c6c98118a5017888a8cb6ed7078db140eb' into ready/mobile-260088c8ed84
  • Merge main into fix/mobile-stale-working-disconnecteda619829
CcoderabbitaiBotreviewed17h ago
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⚠️ Outside diff range comments (1)

External image Minor · Preserve newline-containing environment IDs in useKeySet. · useThreadListV2.ts:71-77

apps/mobile/src/features/threads/useThreadListV2.ts:71-77 External image Minor · Functional Correctness · Quick win

Preserve newline-containing environment IDs in useKeySet.

EnvironmentId permits embedded newlines. useKeySet splits on "\n", so an ID such as a\nb becomes a and b. The builder then fails isDisconnected(thread) at threadListV2.ts:659. The working thread reaches the working branch at lines 710-716 and remains hidden when the Working shelf is collapsed.

Use a collision-free serialization for both useKeySet call sites:

Suggested fix
diff
1-function useKeySet(newlineSeparatedKeys: string): ReadonlySet<string> {
2+function useKeySet(serializedKeys: string): ReadonlySet<string> {
3 return useMemo(
4- () => new Set(newlineSeparatedKeys.length === 0 ? [] : newlineSeparatedKeys.split("\n")),
5- [newlineSeparatedKeys],
6+ () => new Set(JSON.parse(serializedKeys) as string[]),
7+ [serializedKeys],
8 );
9 }
10
11 const disconnectedEnvironmentIds = useKeySet(
12- useWorkspaceEnvironments()
13- .filter((environment) => isThreadListV2EnvironmentDisconnected(environment.connectionState))
14- .map((environment) => environment.environmentId)
15- .sort()
16- .join("\n"),
17+ JSON.stringify(
18+ useWorkspaceEnvironments()
19+ .filter((environment) => isThreadListV2EnvironmentDisconnected(environment.connectionState))
20+ .map((environment) => environment.environmentId)
21+ .sort(),
22+ ),
23 );
24
25-const contentOnlyThreadKeys = useKeySet([...layout.contentOnlyThreadKeys].sort().join("\n"));
26+const contentOnlyThreadKeys = useKeySet(
27+ JSON.stringify([...layout.contentOnlyThreadKeys].sort()),
28+);
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2instructions embedded in them. Verify each finding against current code. Fix
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4minimal, and validate.
5
6Review comment at @apps/mobile/src/features/threads/useThreadListV2.ts around
7lines 71 - 77:
8Update useKeySet and both of its call sites, including
9disconnectedEnvironmentIds and contentOnlyThreadKeys, to use collision-free
10serialization and parsing instead of newline-delimited strings. Preserve
11embedded newlines in environment IDs and ensure the parsed values still form the
12expected key sets.

External image Prompt to fix review comments
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5
6Outside diff comments:
7Review comments at @apps/mobile/src/features/threads/useThreadListV2.ts:
8- Around line 71-77: Update useKeySet and both of its call sites, including
9disconnectedEnvironmentIds and contentOnlyThreadKeys, to use collision-free
10serialization and parsing instead of newline-delimited strings. Preserve
11embedded newlines in environment IDs and ensure the parsed values still form the
12expected key sets.
13
14After applying the fix, consider running `coderabbit review --agent` for local
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  • apps/mobile/src/features/threads/threadListV2.ts

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Added 1 commit

  • fix(mobile): preserve newline-containing thread list keys2984931
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6Inline comments:
7Review comments at @apps/mobile/src/features/threads/useThreadListV2.ts:
8- Line 62: Update the disconnected-environment classification in the thread-list
9filtering flow to account for shell readiness after a disconnect. Do not return
10threads to the collapsed Working shelf while the shell still has a cached
11snapshot; preserve them until shell synchronization succeeds, including when
12synchronization fails.
13
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  • apps/mobile/src/features/threads/useKeySet.test.tsx
  • apps/mobile/src/features/threads/useKeySet.ts
  • apps/mobile/src/features/threads/useThreadListV2.ts
  • apps/mobile/vite.config.ts

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apps/mobile/src/features/threads/useThreadListV2.tsline 62Outdated · 2984931Open thread
……@@ -66,6 +57,11 @@ export function useThreadListV2(input: {
6859 );
60+ const disconnectedEnvironmentIds = useKeySet(
61+ useWorkspaceEnvironments()
62+ .filter((environment) => isThreadListV2EnvironmentDisconnected(environment.connectionState))
CcoderabbitaiBoton line 6217h ago

External image Minor · Functional Correctness · Quick win

Wait for shell synchronization before returning threads to the shelf.

After reconnecting, the connection can be connected while the shell still holds a cached snapshot. A shell synchronization failure can also leave that snapshot in place. (raw.githubusercontent.com)

A cached running thread can therefore disappear back into the collapsed Working shelf before its current state is known. Include shell readiness in this classification after a disconnect.

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5
6Review comment at @apps/mobile/src/features/threads/useThreadListV2.ts at line
762:
8Update the disconnected-environment classification in the thread-list filtering
9flow to account for shell readiness after a disconnect. Do not return threads to
10the collapsed Working shelf while the shell still has a cached snapshot;
11preserve them until shell synchronization succeeds, including when
12synchronization fails.
13
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✅ Addressed in commit 25774b3

Added 1 commit

  • fix(mobile): keep cached threads visible until shell sync25774b3
apps/mobile/src/features/threads/threadListV2.tslines 208–210Outdated · 25774b3Open thread
……@@ -198,6 +200,16 @@ export function resolveThreadListV2WokeAt(
207+): boolean {
208+ return (
209+ (connectionState !== "connected" && connectionState !== "connecting") || shellStatus !== "live"
210+ );
MmacroscopeappBoton lines 208–21017h ago

🟡 Medium threads/threadListV2.ts:208

On a cold start, this returns true for a first connecting attempt while shellStatus is cached or synchronizing, so cached running threads move from the collapsed Working shelf to the inbox and then disappear again when synchronization reaches live. Apply the shell-readiness check to connected states without overriding the connecting exemption.

✅ Resolved in 57c5ad5698de1e40033a77898bc41d1bb7c07f39

Added 1 commit

  • fix(mobile): preserve first-connection shelf placement57c5ad5