feat: add /cc-track:spotless command for scoped dead code cleanup

- New spotless command with 7-step workflow for comprehensive dead code analysis
- Supports scoping by commit range, unstaged changes, spec branch, or session context
- Dispatches parallel subagents for investigation and validation
- Includes duplication detection and naming audit
- User-gated execution with verification

Also enhances dead-code-detector agent with AI code slop patterns:
- Excessive defensive code detection
- Type system workaround identification
- Over-documentation flagging
- Abandoned pattern detection
- Debug artifact cleanup

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: cahaseler

agents/dead-code-detector.md

@@ -196,6 +196,38 @@ The following areas were checked and appear properly cleaned:
 - package.json scripts using deleted files
 - Build configs with stale entries
 
+### AI Code Slop Patterns
+
+AI-generated code often leaves behind artifacts that a human wouldn't. Look for:
+
+**Excessive Defensive Code:**
+- Try-catch blocks around code that can't throw
+- Null checks in trusted internal codepaths
+- Redundant type guards after TypeScript already narrows
+- `|| []` or `?? {}` defaults where undefined is impossible
+
+**Type System Workarounds:**
+- Casts to `any` or `unknown` to bypass type issues
+- `// @ts-ignore` or `// @ts-expect-error` without clear reason
+- Overly broad generic types that defeat type safety
+
+**Over-Documentation:**
+- JSDoc comments restating what the code obviously does
+- Comments on every line of simple logic
+- Documentation style inconsistent with rest of codebase
+
+**Abandoned Patterns:**
+- Functions that wrap other functions without adding value
+- Abstract classes with single implementations
+- Interfaces matching exactly one concrete type
+- Configuration objects with only default values used
+
+**Debug Artifacts:**
+- `console.log` statements left behind
+- Commented-out alternative implementations
+- TODO/FIXME comments for completed work
+- Unused variables capturing intermediate values
+
 ## Tools to Use
 
 **Note:** Knip (dead code detection) runs as part of the validation step before this review. If knip found issues, they would have been addressed before review agents are launched. Focus on manual analysis that knip might miss.