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ProviderTurnStartService handed each new parent run every completed subagent's childThreadId/providerThreadId as relatedThreadIds/relatedProviderThreadIds, including delegated (origin app_owned) tasks that run their own runs. On Codex's shared session (supportsMultipleProviderThreadsPerSession), each live parent run then took ownership of the delegated child (ownsChildThread in routeProviderEvent) and ingested every later turn item a second time, once per live parent run. The fix filters routable subagents to origin === "provider_native" before the existing completed-status check. This matches routeProviderEvent, whose mid-turn adoption and handoff of child threads already only considers provider_native subagents. Delegated children are now ingested only by their own run. Native subagents are routed as before. No new regex or parser. Reproduced via the failing test from factory/repro-36438 (relatedThreadIds included thread:app_owned on the base). It was not reproduced live with Codex in this step. The Claude duplicates in the report are not explained by this path and are not addressed.
Commit 08b8689 (origin/main). Ran T3CODE_DEV_SEED=0 vp run dev in a fresh worktree with real Codex (default model via the shared codex provider instance) on a scratch git project. (1) Started an orchestrator thread with t3 thread start --provider codex asking it to fan out 12 delegate_task workers that each run 5 echo commands: 158 delegated turn-item.updated rows, 158 distinct payloads (1.0 copies), so fresh children are not duplicated. (2) Sent the parent a turn running sleep 120; while it was running, sent follow-up messages (t3 thread send) to 3 of the already-completed delegated child threads, each running 3 echo commands. Result: every item of those follow-up turns was stored exactly twice (running x2, completed x2), byte-identical payloads and metadata, distinct event_ids on provider-session:provider-instance:codex:shared, written within ms of each other (overall delegated copies went from 1.0 to 1.12). The child's provider-turn.updated rows show two observing runs: the child's own run (ordinal 2) and the parent's live run (ordinal 8). Measured with the reporter's SQL against the worktree's own database. Failing test pushed: ProviderTurnStartService.test.ts 'leaves delegated children to their own runs when the parent starts a turn' fails on main because relatedThreadIds/relatedProviderThreadIds include the completed app_owned child; filtering routable subagents to origin provider_native made the whole file pass (60/60). That filter was reverted, so the branch carries only the test.
Evidence
Being captured: before and after in the real app. This section is filled in before the pull request can merge.
Tests
Before the fix: vp test run src/orchestration-v2/ProviderTurnStartService.test.ts -t 'leaves delegated children' failed (relatedThreadIds included thread:app_owned). After: vp test run src/orchestration-v2/ProviderTurnStartService.test.ts src/orchestration-v2/RunExecutionService.test.ts passed, 2 files, 128 tests. vp run check:changed passed (format, lint, knip, typecheck of 3 packages, tests of 2 files).
Not in this change
The reporter's Claude-provider duplicate rows are not explained by this Codex shared-session path and were not investigated or changed.
Existing duplicate turn-item.updated rows already in users' databases are not cleaned up or compacted.
Who did the work
Written by Claude Opus 5.5, in Claude Code
Reviewed by GPT-6.1 Sol, in Codex, and by Claude Opus 5.5, each on its own
Proof captured by GPT-6.1 Sol and checked by Claude Opus 5.5
A new parent run is handed every completed subagent's child thread through
relatedThreadIds, including delegated (app_owned) tasks. Those children run
their own runs on the shared Codex session, so a live parent run ingests each
of their later turn items a second time (#36438). Fails on main.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…tems
A new parent run was handed every completed subagent's child thread as a
related thread, including delegated (app_owned) tasks that run their own
runs. On Codex's shared session, each live parent run then ingested the
child's turn items a second time. Only provider-native children are now
routed to the parent run, matching how runs adopt children mid-turn.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Macroscope's review found this PR approvable — Parent turns stop claiming app-owned delegated child event streams, preventing duplicate thread items while preserving provider-native subagent routing. The change is narrowly scoped to event ownership and introduces no data migration or product-default change.
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Related-subagent routing now includes routable children only when their origin is provider_native. A test verifies that startRootRun receives the provider-native child’s thread IDs and excludes the app-owned child.
Changes: Related-subagent routing
Layer / File(s)
Summary
Filter related subagents by origin apps/server/src/orchestration-v2/ProviderTurnStartService.ts, apps/server/src/orchestration-v2/ProviderTurnStartService.test.ts
Routing now checks that a child is provider-native and has a routable status. The test verifies that only provider-native child thread IDs are passed to startRootRun.
This narrows which subagent threads a parent run takes over, so delegated child threads no longer produce repeated events in the Codex shared-session case. No concrete regression was found. Existing duplicate rows are not cleaned up, and the Claude-provider duplicates are not addressed.
Pre-merge checks: 3 · 1
Failed checks: 1 warning
Check name
Status
Explanation
Resolution
Linked Issues check
Issue #36438 expects each provider item update to be appended once to orchestration_events. The reported symptom covers Codex and Claude delegated-task threads. The diff at head (ProviderTurnStartServ…
Either (a) identify the mechanism that duplicates Claude delegated-task item updates and add a code fix and automated test that makes Claude item updates append once, or (b) explicitly narrow issue #36438 scope so that the Claude duplicates…
Passed checks: 3 passed
Check name
Status
Explanation
Title check
The title names the fix and its area: parent turns no longer duplicate delegated task thread items. The changeset filters routable subagents to provider_native origin in ProviderTurnStartService, whic…
Description check
The description covers the required template sections. Problem is described in the opening paragraph with the affected Codex shared-session path. Change explains the provider_native filter and why it …
Out of Scope Changes check
The head diff contains two changes. The first is a one-line origin filter in ProviderTurnStartService.ts, applied before the existing canRouteRelatedSubagent status check. The second is a new test in …
Full details: Title check
Explanation
The title names the fix and its area: parent turns no longer duplicate delegated task thread items. The changeset filters routable subagents to provider_native origin in ProviderTurnStartService, which stops duplicate ingestion of delegated child thread items. The title is specific and matches the main change, and it follows the conventional commit form used in the template. It omits the Codex shared-session scope, which is acceptable for a title.
Full details: Description check
Explanation
The description covers the required template sections. Problem is described in the opening paragraph with the affected Codex shared-session path. Change explains the provider_native filter and why it matches routeProviderEvent. Scope links issue #36438 as the bug report. Verification gives focused test results and a reproduction on main with observed row counts. Known gaps are stated: Claude duplicates are not addressed and the Evidence section is still pending. The template asks for before/after evidence for UI changes, which this server-side change does not need, but the PR's own Evidence section says it must be filled before merge. That is a process item and does not make the description incomplete.
Full details: Out of Scope Changes check
Explanation
The head diff contains two changes. The first is a one-line origin filter in ProviderTurnStartService.ts, applied before the existing canRouteRelatedSubagent status check. The second is a new test in ProviderTurnStartService.test.ts. The test checks that a parent run receives only the provider_native child's thread IDs in relatedThreadIds and relatedProviderThreadIds. Both changes connect directly to the Codex shared-session duplication objective of #36438. No unrelated files or refactors appear in the reviewed diff for the implementation file. The PR description states that the Claude path and existing duplicate rows are not changed, and the diff matches that statement. Note: the PR description's reproduction section says the filter was reverted on the repro branch and that only the test is carried. That text conflicts with the head diff, which includes the filter. The head diff was used as the source of truth.
Full details: Linked Issues check
Explanation
Issue #36438 expects each provider item update to be appended once to orchestration_events. The reported symptom covers Codex and Claude delegated-task threads. The diff at head (ProviderTurnStartService.ts, lines 1586-1594) adds subagent.origin === "provider_native" to the routable-subagent filter. This stops the Codex shared-session path, where a parent run re-ingests a delegated app_owned child's items. The test 'leaves delegated children to their own runs when the parent starts a turn' covers this path. The PR does not address the Claude duplicates. The issue reports Claude duplicate rows of 2.0 to 20.5 copies per payload. The PR description states that this path does not explain them and that they are not addressed. No code in the PR changes the Claude path. Live before/after evidence is not yet captured; the PR description marks the Evidence section as pending. The Codex fix is supported by the diff and the test. The issue's expected behavior is not met for Claude-provider threads.
Resolution
Either (a) identify the mechanism that duplicates Claude delegated-task item updates and add a code fix and automated test that makes Claude item updates append once, or (b) explicitly narrow issue #36438 scope so that the Claude duplicates are tracked separately, then re-assess against the narrowed requirement. Also capture the live before/after evidence for the Codex path, as the PR description requires.
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Prompt to fix all issues
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only still-valid issues, skip the rest with a brief reason, keep changes
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Failed pre-merge checks:
- Linked Issues check:
Either (a) identify the mechanism that duplicates Claude delegated-task item
updates and add a code fix and automated test that makes Claude item updates
append once, or (b) explicitly narrow issue #36438 scope so that the Claude
duplicates are tracked separately, then re-assess against the narrowed
requirement. Also capture the live before/after evidence for the Codex path, as
the PR description requires.
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ProviderTurnStartService handed each new parent run every completed subagent's childThreadId/providerThreadId as relatedThreadIds/relatedProviderThreadIds, including delegated (origin app_owned) tasks that run their own runs. On Codex's shared session (supportsMultipleProviderThreadsPerSession), each live parent run then took ownership of the delegated child (ownsChildThread in routeProviderEvent) and ingested every later turn item a second time, once per live parent run. The fix filters routable subagents to origin === "provider_native" before the existing completed-status check. This matches routeProviderEvent, whose mid-turn adoption and handoff of child threads already only considers provider_native subagents. Delegated children are now ingested only by their own run. Native subagents are routed as before. No new regex or parser. Reproduced via the failing test from factory/repro-36438 (relatedThreadIds included thread:app_owned on the base). It was not reproduced live with Codex in this step. The Claude duplicates in the report are not explained by this path and are not addressed.
Fixes #36438
Reproduction on main
Commit 08b8689 (origin/main). Ran
T3CODE_DEV_SEED=0 vp run devin a fresh worktree with real Codex (default model via the sharedcodexprovider instance) on a scratch git project. (1) Started an orchestrator thread witht3 thread start --provider codexasking it to fan out 12 delegate_task workers that each run 5echocommands: 158 delegated turn-item.updated rows, 158 distinct payloads (1.0 copies), so fresh children are not duplicated. (2) Sent the parent a turn runningsleep 120; while it was running, sent follow-up messages (t3 thread send) to 3 of the already-completed delegated child threads, each running 3echocommands. Result: every item of those follow-up turns was stored exactly twice (runningx2,completedx2), byte-identical payloads and metadata, distinct event_ids onprovider-session:provider-instance:codex:shared, written within ms of each other (overall delegated copies went from 1.0 to 1.12). The child's provider-turn.updated rows show two observing runs: the child's own run (ordinal 2) and the parent's live run (ordinal 8). Measured with the reporter's SQL against the worktree's own database. Failing test pushed: ProviderTurnStartService.test.ts 'leaves delegated children to their own runs when the parent starts a turn' fails on main because relatedThreadIds/relatedProviderThreadIds include the completed app_owned child; filtering routable subagents to origin provider_native made the whole file pass (60/60). That filter was reverted, so the branch carries only the test.Evidence
Being captured: before and after in the real app. This section is filled in before the pull request can merge.
Tests
Before the fix: vp test run src/orchestration-v2/ProviderTurnStartService.test.ts -t 'leaves delegated children' failed (relatedThreadIds included thread:app_owned). After: vp test run src/orchestration-v2/ProviderTurnStartService.test.ts src/orchestration-v2/RunExecutionService.test.ts passed, 2 files, 128 tests. vp run check:changed passed (format, lint, knip, typecheck of 3 packages, tests of 2 files).
Not in this change
Who did the work
Run by the t3code factory in T3 Code.