Stacked on #2472 (Phase B slice B3.1). Base is
`feature/workflow-vocabulary-b3-stranded-todo` — do not merge before it.
First output of the **U4 reshape survey**: dead code removed with
reachability evidence, not a redundancy argument.
## What is deleted
**`SelfHealingManager.resetStepsIfWorkLost`** — 50 lines including its
docblock and a section header left with no other member.
Evidence:
- `private`, with **zero in-file references** beyond its own
declaration.
- TypeScript already reported it as `declared but its value is never
read` — the compiler has been flagging this.
- The **live** implementation is `executor.ts:20080`, an independent
copy that `executor.ts` actually calls (12667, 14664). The self-healing
copy is an orphaned duplicate of it.
- Not in either sweep registry, no test of its own, no caller anywhere
in engine / dashboard / cli.
Safe against every U4 constraint: it enforces none of user pause,
`autoMerge:false`, dependency, capacity, merge-proof, or an at-most-once
safeguard.
## Why the second approved deletion is NOT here
`surfaceDependencyBlockedTodos` was approved alongside this one as a
28-line orphan. It is not. On inspection it is the **tip of an entire
unreachable feature**:
```
surfaceDependencyBlockedTodos (in NEITHER registry, no production caller)
└─ getDependencyBlockedTodoReporter() ← sole caller
└─ engine/dependency-blocked-todo-reporter.ts 223 lines ← sole caller of ↓
└─ core/dependency-blocked-todo-report.ts 184 lines
```
≈ **450 production lines across three files, plus 684 lines of tests in
four files.** The operator-visible setting
`dependencyBlockedTodoReportEnabled` defaults `true` in
`settings-schema.ts` and drives nothing.
Deleting only the approved 28-line tip would be **strictly worse than
leaving it** — it orphans the getter and field and strands 407 lines of
module with no remaining reference to explain why. Escalated for a
decision (delete the subtree / wire the feature up / leave it) rather
than resolved unilaterally.
## Verification
- `tsc --noEmit` clean, `pnpm lint` clean
- self-healing suite: **415 passed**, 1 failure **pre-existing**
(`archiveStaleDoneTasks` — fails identically before this change)
No changeset: `@fusion/engine` is private.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **Behavior Changes**
* Removed automatic detection and reset of task steps when no unique
work is found on a task branch.
* Tasks with completed or in-progress steps will no longer be
automatically returned to pending based on this condition.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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