SIGIL · v0.1

A sigil summons a behavior.

In Claude Code, a slash command is a sigil — a short mark that invokes a specific behavior. Sigil scans your repo and writes a set tailored to your stack: your framework, your test runner, your package manager, your conventions. One run. Done.

$ npx sigil

Detected stack:
  pkgmgr      pnpm
  languages   javascript, typescript
  frameworks  nextjs
  tests       vitest
  flags       typescript, next-router:app

Wrote 7 commands:
  ✓ /commit
  ✓ /review
  ✓ /add-route
  ✓ /add-server-action
  ✓ /add-api-route
  ✓ /add-test
  ✓ /find-dead-code

+7 premium commands available:
  ○ /add-feature        TDD-first feature add
  ○ /fix-bug            Systematic debugging
  ○ /pr-self-review     Pre-push self-review
  ○ /safe-rename        Cross-codebase TS rename
  ○ /optimize-rerenders Find React re-render hotspots
  ○ /audit-bundle       Find oversized client bundles
  ○ /add-rate-limit     Per-route rate limiting

How it works

The CLI reads package.json, pyproject.toml, Makefile, lockfiles, and your top-level dirs. It detects 7 frameworks, 3 test runners, 4 databases, 4 package managers, monorepo shape, and CI presence. Then it writes commands whose {{testCommand}}, {{buildCommand}}, {{typecheckCommand}} are substituted with the right invocation for your stack.

No LLM at runtime. No API key. Deterministic. Runs in <100 ms.

Free tier — 12 commands

Universal — /commit, /review, /add-test, /find-dead-code
Next.js App Router — /add-route, /add-server-action, /add-api-route
FastAPI — /add-endpoint, /add-pydantic-model
Django — /add-view, /add-model
Monorepo — /add-package
CI — /check-actions-status

$19

One-time. No subscription. Includes lifetime updates to v1.x.

Buy the premium pack →

What's in the premium pack — 8 deeper commands

Command	What it does
`/add-feature`	TDD-first feature add — failing test, minimum impl, refactor
`/fix-bug`	Systematic debugging — repro, root cause, regression test, no symptom-patching
`/pr-self-review`	Senior-reviewer self-review checklist before pushing
`/safe-rename`	Cross-codebase TypeScript symbol rename — exports, callers, type refs
`/optimize-rerenders`	Find React re-render hotspots — bad memo, unstable refs, context fan-out
`/audit-bundle`	Find oversized Next.js client bundles, server modules in client
`/safe-migration`	Deploy-safe DB migrations — Prisma, Drizzle, Alembic, Django
`/add-rate-limit`	Per-route rate limiting with proper IP/user keys and 429 responses

Each premium command is longer, sharper, and more opinionated than the free tier. They push back on anti-patterns, refuse to suppress errors, enforce real TDD instead of test-after-the-fact.

After purchase

You get an email with a download link. Drop the archive into ~/.sigil/templates/ and re-run npx sigil. Premium commands now render automatically — no license key, no env var.