constitution-reference

constitution-reference is a skill for Claude Code from zachjxyz/jvn. It costs 13 tokens per session (224 once invoked), scanned A, original, MIT.

A reference guide for checking a project's constitution, meaning the file that defines its required technologies, coding principles, collaboration rules, and quality checks.

In plain words
What is it for?
Use it when validating code against .specify/memory/constitution.md, especially before deciding whether tests, architecture, or approval steps meet project requirements.
Why use it?
It prevents validation from relying on memory or assumptions about how the project should be built. If the constitution is missing or empty, it stops instead of pretending there are rules to check.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/zachjxyz/jvn/constitution-reference
Any agent
npx skills add zachjxyz/jvn --skill constitution-reference
Clone the repo
git clone --depth 1 https://github.com/zachjxyz/jvn

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for constitution-reference

README.md
[![agentmods](https://agentmods.dev/badge/skills/zachjxyz/jvn/constitution-reference.svg)](https://agentmods.dev/skills/zachjxyz/jvn/constitution-reference)
Your own site
<a href="https://agentmods.dev/skills/zachjxyz/jvn/constitution-reference"><img src="https://agentmods.dev/badge/skills/zachjxyz/jvn/constitution-reference.svg" alt="Measured on agentmods" height="20"></a>
Per session 13 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 224 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00013 $0.00224
Opus 5 $0.00006 $0.00112
Sonnet 5 $0.00003 $0.00045
Haiku 4.5 $0.00001 $0.00022

Measured 6d ago against content hash 9bd11c2ec6d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

constitution-reference scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

template/.claude/skills/constitution-reference/SKILL.md · 33 lines

What it actually says

Constitution Reference

Location

The project constitution lives at .specify/memory/constitution.md.

How to Read

Always use the Read tool to load the FULL constitution before any validation. Never validate from memory or assumptions.

What to Extract

When reading the constitution, identify:

  1. Stack Principles — What technologies are mandated and their usage patterns
  2. Engineering Principles — How code should be written (TDD, type safety, simplicity)
  3. AI Collaboration Principles — How human and AI work together (gates, approval flow)
  4. Quality Gates — What must pass before a phase is considered complete

If Constitution Doesn't Exist

If .specify/memory/constitution.md does not exist or is empty:

  1. Report that no constitution has been established
  2. Recommend editing .specify/memory/constitution.md directly
  3. Do NOT proceed with validation — there is nothing to validate against
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 33 lines · 13 tokens per session scan A 9bd11c2ec6d4

Subscribe to this mod's changes

constitution-reference is a skill published in the GitHub repository zachjxyz/jvn (2 stars, last pushed 5mo ago), licensed MIT. It adds 13 tokens to every session and 224 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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