cleanup-dedupe

Find duplicated code and consolidate where it reduces complexity. Auto-extract only token-identical, sizeable blocks. Smaller or divergent duplicates often shouldn't be DRY'd — premature abstraction is worse than 3 similar lines. ## Preflight 1. **Language detect** — jscpd handles 150+ languages, so we run it on whatever is present. 2. **Git state**: refuse auto-apply on dirty tree. 3. **Report dir**: ensure `.claude/cleanup-reports/` exists. 4. **Read existing util conventions**: where does the project keep shared utilities? Look for `lib/`, `utils/`, `shared/`, `common/`, package directories. Extracted code goes there. ## Detect ```bash # jscpd - the standard for cross-language clone detection bunx jscpd --min-tokens 70 --min-lines 30 --threshold 0 --reporters json --output /tmp/jscpd-out . 2>/dev/null \ || npx jscpd --min-tokens 70 --min-lines 30 --reporters json --output /tmp/jscpd-out . ``` Parse `/tmp/jscpd-out/jscpd-report.json`. Each duplication entry has `firstFile`, `secondFile`, `lines`, `tokens`, and the actual fragment. **Filter the noise** before further analysis: - Drop matches in `node_modules/`, `dist/`, `build/`, `.next/`, `__generated__/`, `*.generated.*`. - Drop matches inside test files mirroring each other (test setup duplication is often intentional). - Drop matches that are just type/interface definitions — those go to `cleanup-types`. - Drop matches in migration files. ## Assess Write `.claude/cleanup-reports/cleanup-dedupe-{YYYY-MM-DD}.md`:...