/fix

name: autoresearch:fix
description: "Crush errors one-by-one until zero remain: tests, types, lint, build"
argument-hint: "[Target: <cmd>] [Scope: <glob>] [Guard: <cmd>] [Iterations: N] [--evals] [--from-debug]"
disable-model-invocation: true

EXECUTE IMMEDIATELY.

Parse Arguments

Extract from $ARGUMENTS:

• `Target:` or `--target` — command that shows errors (e.g., `npm test`, `tsc --noEmit`)
• `Scope:` or `--scope` — file globs to modify
• `Guard:` or `--guard` — safety command (must always pass)
• `Iterations:` or `--iterations` — default 20. "unlimited" for unbounded.
• `--from-debug` — read handoff.json from previous debug run
• `--category` — filter: test, type, lint, build
• `--evals`, `--evals-interval N`, `--chain`

Setup (if required context missing)

If Target and Scope both missing: 1. Auto-detect failures: run test suite, type checker, linter, build 2. Present results via AskUserQuestion (single batched call): Q1 (Fix What): "Found [N] test failures, [M] type errors, [K] lint errors. Fix what?" — everything, only tests, only types, only lint Q2 (Guard): "Safety command that must always pass?" — npm test, tsc, npm run build, skip Q3 (Scope): "Which files can I modify?" — suggested globs from error locations + all Q4 (Launch): "Ready?" — fix until zero, fix with limit, cancel If all provided → skip setup. If --from-debug → read handoff.json for scope and findings.

Precondition Checks

Verify: git repo exists, clean working tree, no lock files, no detached HEAD. Fail fast on critical issues.

Establish Baseline (Iteration 0)

1. Run Target command → count errors (metric = error count, direction = lower_is_better) 2. Record baseline in TSV 3. Create output directory: `autoresearch/fix-{YYMMDD}-{HHMM}/` 4. TSV header: `# metric_direction: lower_is_better\niteration\ttimestamp\terror_type\terror_fixed\tcommit\tmetric\tdelta\tguard\tstatus\tdescription`

Iteration Loop (until zero errors or max_iterations)

Phase 1: Review

• Read results TSV + git log
• Run Target to get current error list
• If error count == 0 → exit loop (SUCCESS)

Phase 2: Prioritize

Order: crash/fatal → test failures → type errors → lint → warnings. Within category: easiest first (single-file fixes before cross-file).

Phase 3: Fix ONE Thing

• Pick the highest-priority error
• Make ONE focused fix (atomic — addresses exactly one error)
• Record error type and which error was fixed

Phase 4: Commit

• Stage and commit: `experiment: fix {error_type} — {description}`

Phase 5: Verify

• Run Target → count errors → compute delta
• Expected: error count decreased by 1 or more

Phase 6: Guard

• If Guard set → run Guard. If fails → revert.

Phase 7: Decide

• **keep** — error count decreased AND guard passes
• **keep (reworked)** — fix needed adjustment, second attempt worked
• **discard** — error count same/increased → `git revert HEAD --no-edit`
• **crash** — target/guard command failed → revert
• **hook-blocked** — git hook blocked the commit
• **metric-error** — target output not parseable → revert

Phase 8: Log

Append row: iteration, timestamp, error_type, error_fixed, commit/-, metric (error count), delta, guard, status, description

Eval Checkpoint

If --evals: check if current_iteration % interval == 0 → run checkpoint analysis.

Bounded Check

If bounded: current_iteration >= max_iterations → exit loop, print summary.

Summary

Print: total errors fixed, remaining errors, error types distribution, fix success rate.

Eval Checkpoint (--evals flag)

If --evals present:

• Compute interval: floor(max_iterations / 3), min 1. Fixed 10 if unbounded. Override: --evals-interval N.
• Every {interval} iterations, pause and analyze current results TSV.
• Print: `--- Eval Checkpoint (iterations {X}-{Y}) ---\nErrors: {start} → {end} ({delta}) | Kept: {n}/{total} | Trend: {up/flat/down}\n{one-line recommendation}\n---`
• If plateau 3+ checkpoints → recommend early stop.
• At loop end → full evals summary to evals-summary.md in output directory.

Chain Handoff

After completion, write handoff.json to output directory: version "2.1.0", source "fix", timestamp, status (COMPLETE|USER_INTERRUPT|BOUNDED|ERROR), results_tsv path, findings = unfixed errors, config{target, scope, guard}. Invoke next target in --chain order via the `autoresearch` skill's Subcommand routing. Propagate --evals flag.