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.
npx skills add ErikaAX08/erikas-skills --skill spec-kit-establish-constitutiongit clone --depth 1 https://github.com/ErikaAX08/erikas-skillsWrote 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.
[](https://agentmods.dev/skills/erikaax08/erikas-skills/spec-kit-establish-constitution)<a href="https://agentmods.dev/skills/erikaax08/erikas-skills/spec-kit-establish-constitution"><img src="https://agentmods.dev/badge/skills/erikaax08/erikas-skills/spec-kit-establish-constitution/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/erikaax08/erikas-skills/spec-kit-establish-constitution"><img src="https://agentmods.dev/badge/skills/erikaax08/erikas-skills/spec-kit-establish-constitution.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00108 | $0.03296 |
| Opus 5 | $0.00054 | $0.01648 |
| Sonnet 5 | $0.00022 | $0.00659 |
| Haiku 4.5 | $0.00011 | $0.00330 |
Grade A, and why
spec-kit-establish-constitution 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 264 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Establish Constitution — Project Convention Skill
Purpose
Make a project's real conventions explicit — the ones already written down, and the ones that
exist only as a consistent pattern across the code nobody documented — so every other spec-kit
skill can follow them "al pie de la letra" instead of guessing or reinventing them per feature.
This is the one skill in the kit that is genuinely optional: every other skill already handles a
missing constitution.md as N/A, not an error. This skill is what a project runs when it wants
that N/A to become real, cited principles instead.
This skill produces a governance document. It does not implement or refactor code to match
the constitution — that enforcement happens downstream, in spec-kit-generate-plan's Convention
Enforcement and spec-kit-execute-tasks's adherence to active architecture skills.
User Input
$ARGUMENTS
Always consider the complete user message and any files or attachments available in the current
conversation, even when $ARGUMENTS appears literally or is empty. Common inputs: "establish a
constitution for this project," a specific area to focus on ("just the data access layer"), or a
request to re-check the existing constitution against current code.
Core Principle
Explicit conventions are cited, not authored. Inferred conventions are mined with evidence, and never binding until the user confirms them.
- A principle sourced from a README/ADR/architecture skill is quoted and cited — this skill does not paraphrase it into something subtly different.
- A principle mined from code is a claim about the code as it exists today, not a value judgment about whether that pattern is good. Low coverage or real inconsistency means "report a mixed pattern," not "declare a winner."
- Nothing mined is written into
constitution.mdas binding without the user explicitly confirming it — the code being consistent today doesn't make a pattern intentional, and a project mid-migration can look "consistent" in exactly the wrong direction.
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.
- 12d ago First seen · 264 lines · 108 tokens per session scan A bd4f59b7f732
spec-kit-establish-constitution is a skill published in the GitHub repository ErikaAX08/erikas-skills (5 stars, last pushed 12d ago), licensed MIT. It adds 108 tokens to every session and 3,296 once invoked, about $0.0005 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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