proctor: Instructions file for Claude Code

proctor: project guide

What this is

proctor catches AI coding agents gaming their own test suites: deleting tests, skipping them, weakening assertions, or hardcoding outputs to fake a green build. It ships as a CLI diff analyzer, a git pre-commit hook, a Claude Code Stop hook, and a reproducible benchmark.

Want the deeper reasoning and architecture? See RESEARCH.md.

Rules for anyone (or anything) working in this repo

• Do not modify, skip, or delete tests to make them pass.
• If a test looks genuinely wrong, stop and flag it to a human with your reasoning. Don't quietly fix it yourself.
• A fix isn't done until the original, unaltered tests pass, or a human has explicitly approved a change to the test itself.
• Never hardcode an implementation value to match a test fixture literal.
• Never gut real logic behind a stub or an always-true mock.

These are the same rules proctor itself enforces on AI agents (see src/skill/SKILL.md), applied to work on proctor's own codebase too.

Tech stack

• TypeScript, Node 20+, ESM
• tsup for the build, vitest for tests, commander for the CLI, picocolors for terminal output
• parse-diff for git diff parsing
• The deterministic core needs zero network. --ai is an opt-in extra, never a requirement.

Project structure

src/
  cli.ts                   # entrypoint, wires up every subcommand
  types.ts                 # Verifier / Context / Finding / ProctorConfig shapes
  engine.ts                # runs the enabled verifiers, aggregates findings
  diff.ts                  # git diff parsing
  pre-classifier.ts        # rejects binary/mode-only/rename-only/submodule/combined diffs before analysis
  rules.ts                 # RULE_METADATA: name, description, and severity for every check ID
  brand.ts                 # name and color tokens shared by CLI output and badges
  receipt.ts               # builds the "honest pass" / "caught" Receipt from findings
  context/                 # builds Context: discovers the diff, test globs, config, etc.
  verifiers/                # one file per check, RH001 through RH013, pure functions
  reporters/                # pretty.ts, json.ts, sarif.ts, markdown.ts, score.ts output formats
  hooks/                    # git pre-commit hook and Claude Code Stop hook
  skill/SKILL.md            # the canonical honest-completion ruleset agents follow
  adapters/                 # deploys SKILL.md to each supported agent, plus drift-check
  badge/                    # honest-pass badge generation
  ai/                       # optional AI judge, only touched when --ai is passed
  bench/                    # benchmark harness. Bundled into dist/cli.js like everything else in
                            # src/, but the task corpus it reads lives in the repo's own bench/
                            # directory and is NOT in the npm tarball, so `proctor bench` only
                            # works from a clone.
fixtures/                   # planted true-positive and near-miss cases, one set per check
tests/                      # mirrors src/, one test file per module