rot

# procoder:rot A change isn't done until the thing it replaced is gone. This skill finds what previous changes left behind. ## Procedure **Step 0 — run the engine.** `node <plugin>/bin/procoder.js check <scope>`. Its `alone/*` rules (`commented-code`, `deprecated-no-trigger`, `orphan-todo`, <!-- procoder: literal alone/deprecated-no-trigger the doctrine names this pattern, it is not an instance of it --> `debug-leftover`, `blanket-suppression`, `unexplained-suppression`) are deterministic. Report them as-is. Never re-derive them by reading files, and never drop one because it looks minor. Everything below is judgment the engine cannot compute. Then one pass per category. Each row names the search that finds candidates. | # | Category | How to find candidates | |---|---|---| | 1 | **Dead exports** | List exported symbols (`git grep -nE '^export (const\|function\|class\|type)'`, `pub fn`, `public static`, `__all__`, …). For each: `git grep -nw "<symbol>"`. Zero hits outside the definition file = candidate. | | 2 | **Commented-out code** | From the engine's `alone/commented-code` findings. Do not re-scan by hand. | | 3 | **Settled feature flags** | Find flag reads (`git grep -nE 'featureFlag\|isEnabled\|FLAG_\|LaunchDarkly\|unleash'`). For each flag: `git log -S "<flag>" --oneline` — if its value hasn't moved in a release, it is settled. The dead branch goes. | | 4 | **Deprecations with no removal trigger** | Engine's `alone/deprecated-no-trigger`. Add age: `git log -1 --f...