fix(server): abort OpenCode child sessions on interrupt

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coderabbitai]

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coderabbitai]

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coderabbitai]

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coderabbitai]

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!

[NitayRabi]

Summary

• enumerate OpenCode child sessions when interrupting a turn
• abort child/sub-agent sessions before aborting the parent session
• preserve parent abort behavior when child enumeration is unsupported or fails
• add regression coverage for multiple child sessions

Closes#7769.

Why

OpenCode sub-agents use child sessions. Relying only on session.abort(parent) leaves T3 dependent on the installed OpenCode version propagating cancellation to all children. When that propagation fails, the child provider stream remains alive and can occupy a single-slot local inference server indefinitely.

Validation

• vp test apps/server/src/provider/Layers/OpenCodeAdapter.test.ts (33 passed)
• vp run --filter t3 typecheck
• vp fmt --check apps/server/src/provider/Layers/OpenCodeAdapter.ts apps/server/src/provider/Layers/OpenCodeAdapter.test.ts
• git diff --check

Note

Abort child OpenCode sessions on interruptTurn

• Adds abortOpenCodeSessionTree to abort a parent session and then enumerate and abort its children concurrently via the SDK in OpenCodeAdapter.ts
• interruptTurn now calls this tree-abort utility instead of aborting only the parent
• Test double gains onAbort and sessionChildrenById hooks to simulate children created during parent abort
• Risk: per-child abort errors are silently ignored; if the SDK children query fails, child sessions may survive the interrupt

^{Macroscope summarized a677515.}

---

Note

Medium Risk
Changes turn-interrupt cancellation for OpenCode, which can leave local inference slots occupied if child aborts are missed. Child enumeration errors are swallowed, so a failed session.children call still only aborts the parent.

Overview
User interrupt now cancels the OpenCode parent session first, then enumerates remaining child/sub-agent sessions and aborts those too. That covers older OpenCode builds that do not propagate parent abort, and still catches children spawned during the parent abort.

interruptTurn uses a new abortOpenCodeSessionTree helper. Child listing failures become an empty list (parent abort still succeeds). Individual child aborts are ignored so one failure does not block the rest.

Adds a regression test that asserts parent abort is first and that children present at abort time—including one created during parent abort—are aborted afterwards.

^{Reviewed by Cursor Bugbot for commit a677515. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coderabbitai]

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[macroscopeapp]

Approvability

Verdict: Approved at a677515

Macroscope's review found this PR approvable — This is a focused OpenCode cancellation bug fix that preserves parent interruption while also cleaning up surviving child sessions. The production change is isolated to interrupt handling and is covered by targeted regression tests.

Notes:

• No code objects were reviewed. Approvability was decided on eligibility alone.

^{You can add or adjust custom eligibility rules. Learn more.}

[juliusmarminge]

Closing because #9005 already added OpenCode child-session cancellation, including children created during the parent abort and nested descendants. Thanks for working on this!