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 agentmods add skills/ambystechcom/ambykit/amby-constitutionnpx skills add ambystechcom/AmbyKit --skill amby-constitutiongit clone --depth 1 https://github.com/ambystechcom/AmbyKitWrote 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/ambystechcom/ambykit/amby-constitution)<a href="https://agentmods.dev/skills/ambystechcom/ambykit/amby-constitution"><img src="https://agentmods.dev/badge/skills/ambystechcom/ambykit/amby-constitution.svg" alt="Measured on agentmods" 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 | $0.00018 | $0.00235 |
| Opus 5 | $0.00009 | $0.00118 |
| Sonnet 5 | $0.00004 | $0.00047 |
| Haiku 4.5 | $0.00002 | $0.00023 |
Grade A, and why
amby-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 4d 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.
What it actually says
Establish or update the project constitution at .amby/constitution.md.
- If the file is missing, create it from
@.amby/templates/constitution.mdand fill it in. If it exists, amend only the section relevant tothe user's request that followed this skill invocation(or, with no argument, review all principles briefly). - Interview the user only where a principle is unclear — ask one focused question at a time.
- Keep each principle short, imperative, and numbered so later phases can cite it.
- Cover: code quality, testing standards, UX consistency, performance/reliability, security. Add project-specific non-negotiables as needed.
- Bump the version and update the date. Do not restate feature requirements — those belong in specs.
Output only the edited constitution. Be concise.
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.
- 4d ago First seen · 18 lines · 18 tokens per session scan A 55dc8f5d7dfd
amby-constitution is a skill published in the GitHub repository ambystechcom/AmbyKit (2 stars, last pushed 9d ago), licensed MIT. It adds 18 tokens to every session and 235 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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