Signum
Use when the user wants contract-first development — define correctness before coding, implement against a contract, audit with multiple models, and package proof artifacts.
Install
npx skills add heurema/signum --skill signumgit clone --depth 1 https://github.com/heurema/signum.git /tmp/signum
mkdir -p ~/.claude/skills
cp -r /tmp/signum/. ~/.claude/skills/signumPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# Signum — Evidence-Driven Development Pipeline Run a CONTRACT → EXECUTE → AUDIT → PACK pipeline for any implementation task. ## When to Use - User asks to "implement X" and you want verifiable correctness - Task requires multi-model code review - Changes need proof artifacts for CI/CD gates - Risk is medium-high and ad hoc coding is insufficient ## Pipeline 1. **CONTRACT** — Turn the request into a verifiable contract with acceptance criteria 2. **EXECUTE** — Implement against the contract, not a vague prompt 3. **AUDIT** — Deterministic checks (lint, test, scope) + optional multi-model review 4. **PACK** — Package into a proofpack artifact with verdict (AUTO_OK / HUMAN_REVIEW / AUTO_BLOCK) ## Core Rules - Do not start implementation before a contract exists - If the contract is vague, stop and improve it - Check against deterministic criteria, not just model opinion - Keep active run/pipeline artifacts under `.signum/contracts/<contractId>/` - Treat root `.signum/` as the registry/state/archive/compatibility namespace, not the canonical per-run artifact root - If reduced audit coverage on medium/high-risk task → HUMAN_REVIEW, not AUTO_OK
Details
- Skill name
signum- Repository
- heurema/signum
- License
- MIT
- Repo updated
- 20 July 2026
FAQ
What does the Signum skill do?
Use when the user wants contract-first development — define correctness before coding, implement against a contract, audit with multiple models, and package proof artifacts.
How do I install the Signum skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add heurema/signum --skill signum. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Signum popular?
It lives in heurema/signum, which has 18 GitHub stars and 2 forks.
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