Follow-up to **#3109** (merged). Independent of my other branches.
## The gap
#3109 put resolved lanes on `task:moved` and wired the main move path in
`moves.ts`. **Two other emit paths still fired lane-less** — and to a
listener, a lane-less emit is not a *missing* answer, it is the
**legacy** answer, which on a renamed board is wrong.
Concretely: `archiveTaskBackendImpl` emits its own `task:moved`. The
executor's archive branch releases the task's active-session registry
entry, and **that entry is what blocks a successor task from acquiring
the same path**. Fixing the listener alone (#3112) leaves the leak
reachable *through this emitter*, because the listener still falls back
to the literal when the payload carries nothing.
That's the part worth noting for the pattern generally: **a
payload-carrying design is only as good as its emitters.** Converting
consumers without sweeping producers leaves a hole that looks fixed at
the call site.
## Scope
| Emit path | Action |
|---|---|
| `archive-lifecycle-2.ts:373` (`archiveTaskBackendImpl`) | carries
lanes |
| `task-artifacts-ops.ts:549` (`moveToDoneImpl`) | carries lanes |
| `lifecycle-ops.ts:715` | **untouched** — fires from a watcher callback
|
| `task-update.ts:962` | **untouched** — sync path |
Both converted sites are already `async` and already import
`resolveWorkflowIrForTask`, so this costs one IR read on a transition
that has just done database work. Fail-soft to `undefined`, matching
`moves.ts` — "unknown", never a wrong answer.
The two untouched ones each need their own look rather than a blanket
sweep; flagged, not guessed.
## Verification
- `@fusion/core` archive/lifecycle suites — **156 green**
- **`pnpm test:gate` green**; `tsc` clean
- Changeset added; `check:changesets` passes
## Census
**No change**, and that's expected — this converts emit *payloads*, not
comparison literals. The effect is that guards already converted in
#3109/#3112 receive a correct answer on these paths instead of a legacy
fallback.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
* **Bug Fixes**
* Task move events now include accurate board lane information when
tasks are archived or marked complete.
* Improved handling for renamed workflows, ensuring task transitions use
the correct lane details.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
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