Remove Deadcode Agent Skill

bunx tsc --noEmit --noUnusedLocals --noUnusedParameters 2>&1

task(subagent_type="explore", run_in_background=true, load_skills=[],
  description="Find orphaned files",
  prompt="Find files in src/ NOT imported by any other file. Check all import statements. EXCLUDE: index.ts, *.test.ts, entry points, .md, packages/. Return: file paths.")

task(subagent_type="explore", run_in_background=true, load_skills=[],
  description="Find unused exported symbols",
  prompt="Find exported functions/types/constants in src/ that are never imported by other files. Cross-reference: for each export, grep the symbol name across src/ — if it only appears in its own file, it's a candidate. EXCLUDE: src/index.ts exports, test files. Return: file path, line, symbol name, export type.")

LspFindReferences(filePath, line, character, includeDeclaration=false)
// 0 references → CONFIRMED dead
// 1+ references → NOT dead, drop from list

| # | File | Symbol | Type | Action |
|---|------|--------|------|--------|
| 1 | src/foo.ts:42 | unusedFunc | function | REMOVE |
| 2 | src/bar.ts:10 | OldType | type | REMOVE |
| 3 | src/baz.ts:7 | ctx | parameter | PREFIX _ |

Batch A: [src/hooks/foo/hook.ts — 3 unused imports]
Batch B: [src/features/bar/manager.ts — 2 unused constants, 1 dead function]
Batch C: [src/tools/baz/tool.ts — 1 unused param, src/tools/baz/types.ts — 1 unused type]
Batch D: [src/dead-file.ts — entire file deletion]

task(
  category="deep",
  load_skills=["typescript-programmer", "git-master"],
  run_in_background=true,
  description="Remove dead code batch N: [brief description]",
  prompt="[see template below]"
)

## TASK: Remove dead code from [file list]

## DEAD CODE TO REMOVE

### [file path] line [N]
- Symbol: `[name]` — [type: unused import / unused constant / unused function / unused parameter / dead file]
- Action: [REMOVE entirely / REMOVE from import list / PREFIX with _]

### [file path] line [N]
- ...

## PROTOCOL

1. Read each file to understand exact syntax at the target lines
2. For each symbol, run LspFindReferences to RE-VERIFY it's still dead (another agent may have changed things)
3. Apply the change:
   - Unused import (only symbol in line): remove entire import line
   - Unused import (one of many): remove only that symbol from the import list
   - Unused constant/function/type: remove the declaration. Clean up trailing blank lines.
   - Unused parameter: prefix with `_` (do NOT remove — required by signature)
   - Dead file: delete with `rm`
4. After ALL edits in this batch, run: `bun run typecheck`
5. If typecheck fails: `git checkout -- [files]` and report failure
6. If typecheck passes: stage ONLY your files and commit:
   `git add [your-specific-files] && git commit -m "refactor: remove dead code from [brief file list]"`
7. Report what you removed and the commit hash

## CRITICAL
- Stage ONLY your batch's files (`git add [specific files]`). NEVER `git add -A` — other agents are working in parallel.
- If typecheck fails after your edits, REVERT all changes and report. Do not attempt to fix.
- Pre-existing test failures in other files are expected. Only typecheck matters for your batch.

bun run typecheck   # must pass
bun test            # note any NEW failures vs pre-existing
bun run build       # must pass

## Dead Code Removal Complete

### Removed
| # | Symbol | File | Type | Commit | Agent |
|---|--------|------|------|--------|-------|
| 1 | unusedFunc | src/foo.ts | function | abc1234 | Batch A |

### Skipped (agent reported failure)
| # | Symbol | File | Reason |
|---|--------|------|--------|

### Verification
- Typecheck: PASS/FAIL
- Tests: X passing, Y failing (Z pre-existing)
- Build: PASS/FAIL
- Total removed: N symbols across M files
- Total commits: K atomic commits
- Parallel agents used: P