U4 trim: delete the dead resetStepsIfWorkLost duplicate in self-healing

[gsxdsm]

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

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.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: ecee60a8-575a-4150-844c-7d7a47fdf2ea

📥 Commits

Reviewing files that changed from the base of the PR and between a4dee11 and eecfccc.

📒 Files selected for processing (1)

• packages/engine/src/self-healing.ts

💤 Files with no reviewable changes (1)

• packages/engine/src/self-healing.ts

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📝 Walkthrough

Walkthrough

The self-healing manager no longer checks task branches for missing unique commits or resets done and in-progress steps to pending.

Changes

Self-healing behavior cleanup

Layer / File(s)	Summary
Remove lost-work reset routine packages/engine/src/self-healing.ts	Deletes branch comparison, automatic step-status resets, and associated logging for lost work detection.

Estimated code review effort: 1 (Trivial) | ~5 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: removing the unused resetStepsIfWorkLost logic from self-healing.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/workflow-vocabulary-u4-dead-code

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[greptile-apps]

Greptile Summary

Removes the unused private SelfHealingManager.resetStepsIfWorkLost duplicate while retaining the independently invoked executor implementation.

Confidence Score: 5/5

The PR appears safe to merge once its declared stacked base dependency is satisfied.

No blocking failure remains.

Important Files Changed

Filename	Overview
packages/engine/src/self-healing.ts	Deletes an unreferenced private lost-work recovery duplicate; no reachable self-healing caller or resulting orphaned dependency was identified.

_{Reviews (3): Last reviewed commit: "refactor(engine): delete the dead resetS..." | Re-trigger Greptile}