Keep wait live after interrupt-with-follow-up

[TheGreatAxios]

Summary

• send_input(interrupt: true) leaves wait live until the queued follow-up settles, instead of freezing the mailbox as interrupted
• Wait, list, and resume agree on running or queued while the follow-up is in flight, then surface the follow-up report as done
• Close and interrupt wait overlays stay interrupted until collected, including when a follow-up later stamps the session completed

Verification

• bun test src/subagent/agent-fleet.test.ts: 75 pass, 0 fail
• bunx eslint on the touched subagent files: no errors (pre-existing warnings only)
• First CI run on this PR: prettier, typecheck, and build-and-test succeeded; eslint failed on deferred<void> in a new test (fixed on the latest push)

Fixes CL-7331

[linear-code]

CL-7331

[TheGreatAxios]

Critic · Comment

send_input(interrupt:true) still acks interrupted and keeps wait live until the follow-up report surfaces. Edge paths can still disagree or drop salvage.

Findings

• src/subagent/agent-fleet.ts:260 — completeAfterInterrupt still deletes forceInterrupted. After this change only close_agent / interrupt_agent set that overlay, so a follow-up reply can undo a later close_agent overlay and freeze wait as done. Trigger: send_input interrupt, then close_agent, then the follow-up resolves before closeOne stamps shutdown.
• src/subagent/lifecycle-tools.ts:385 — onFollowupReply is the only clearer for followupLive. A rejected follow-up never calls it (session-store.ts:822-828), so spawn settlement keeps swallowing original salvage.
• src/subagent/lifecycle-tools.ts:404 — markQueued has no matching clearQueued when the follow-up begins running. projectedStatus then prefers queued over live running, so list status and lifecycle disagree.
• docs/ARCHITECTURE.md:231 — still says send_input with interrupt:true sets the mailbox interrupt overlay so wait unblocks. That is the old contract this PR inverted.

Notes

• interrupt_agent / close_agent still call fleetRecords.interrupt() at the call sites.
• Happy-path tests in agent-fleet.test.ts cover wait-before-send and post-send timeout → done.
• Stale comment at src/subagent/lifecycle-tools.ts:311 still claims the overlay flip is the same as send_input interrupt.

[TheGreatAxios]

Primary · Comment

send_input(interrupt:true) keeps wait live until the follow-up settles on the happy path, but wait/list can still disagree and close/reject paths can drop the overlay or salvage. Cannot request-changes on our own PR; these should-fix items land in follow-up commits on this branch.

Findings

• src/subagent/agent-fleet.ts:260 — completeAfterInterrupt still deletes forceInterrupted, so a follow-up reply can undo a later close_agent overlay and freeze wait as done instead of interrupted.
• src/subagent/lifecycle-tools.ts:385 — follow-up rejection never clears followupLive, so spawn settlement swallows original salvage.
• src/subagent/lifecycle-tools.ts:404 — markQueued has no matching clearQueued when the follow-up begins running, so list can show queued while lifecycle is running.
• docs/ARCHITECTURE.md:231 — still describes the old interrupt-overlay contract this PR inverted.

Notes

• Happy path holds: tool ack stays interrupted; wait/list/resume agree while the follow-up is running; follow-up report surfaces as done.
• CI on this PR is green (prettier, eslint, typecheck, build-and-test).

[TheGreatAxios]

Critic · Comment

Follow-up commits close the prior overlay/salvage/queued holes. One remaining should-fix: an uncollected close overlay still loses to a successful follow-up completed stamp.

Findings

• src/subagent/agent-fleet.ts:330 — projectedStatus returns terminal session status before forceInterrupted. Trigger: no in-flight wait; send_input interrupt; close_agent starts; follow-up complete()s while close is still held; later wait/list show done not interrupted. The new close-window test does not catch this because in-flight wait freezes interrupted first.
• docs/ARCHITECTURE.md:231 — leftover “does not write a mailbox overlay” in the same bullet the follow-up edited.

Notes

• Prior items 1–3 are closed with tests. interrupt_agent comment matches. New ARCHITECTURE sentence matches; the old sentence in the same bullet does not.

[TheGreatAxios]

Primary · Comment

Follow-up commits on this branch close the review findings. Happy path still leaves wait live until the follow-up settles as done; close/interrupt overlays stay interrupted even if a follow-up later stamps the session completed.

Findings

None remaining from the prior should-fix list.

Notes

• projectedStatus consults forceInterrupted before terminal session status.
• Rejected follow-up clears followupLive so salvage can attach.
• Queued overlay clears when the follow-up is admitted.
• deferred<void> in the new tests is now deferred<undefined> so eslint --max-warnings does not fail CI.
• bun test src/subagent/agent-fleet.test.ts: 75 pass.