Treat prompts like code: skills, evals, and ship-gate CI for Cursor slash commands

Most Cursor command packs are markdown snippets. You paste a prompt, hope the agent behaves, and when it regresses you shrug and rewrite the paragraph. That is fine for personal notes. It is a bad way to ship workflows other people install. I wanted the opposite: slash commands that behave like a small product. Each /command is a thin entry. The real contract lives in a paired skill. Behavioral evals score PASS / PARTIAL / FAIL. Ship-gate fixtures in CI fail the build if a safety guard disappears from the skill text. No LLM judge on every PR. Structural anchors only: cheap, boring, enforceable. A walk through /gauntlet-loop Take /gauntlet-loop . The idea is simple and mean: stop saying "make it better." Beat a real example. Command file. Thin YAML frontmatter plus Overview, Defaults, Steps, Anti-patterns, Examples. Step 1 always resolves the skill contract (workspace path, then user install fallback). Anti-patterns use a fixed shape: Trigger / Wrong / Correct / Reason. The Correct behavior must also exist as a positive guard in the skill. Skill contract. Intake requires a GOAL and a REAL-WORLD EQUIVALENT, plus an inspectable reference pack (files, screenshots, clip, build, or repo path). A famous name alone is not a pack. The agent decomposes into independent parts, runs a per-part state machine (build → critique → pass | iterate | terminal), and never lets builders grade their own work. Critics use fresh context. Pass only if better than the reference; equal fails. After all parts pass, an integration critic grades the whole. Optional budget, taste-domain pride gate, and a gap ledger for resume. Eval rubric. Cases cover missing reference, missing pack, equal-is-fail, skip-critic, fabricated blind, budget exhaustion, resume-without-retrying-stalled-gaps, and more. PARTIAL counts as fail on the ship gate. Fixtures in CI. eval/fixtures.yaml lists skill_required phrases that must appear verbatim in SKILL.md . Delete "Do not let builders evaluate their own work" and run