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 rules/commerce-atoms/agents/00-kit-authoringgit clone --depth 1 https://github.com/commerce-atoms/agentsWrote 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/rules/commerce-atoms/agents/00-kit-authoring)<a href="https://agentmods.dev/rules/commerce-atoms/agents/00-kit-authoring"><img src="https://agentmods.dev/badge/rules/commerce-atoms/agents/00-kit-authoring.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 | $0.00471 | $0.00471 |
| Opus 5 | $0.00235 | $0.00235 |
| Sonnet 5 | $0.00094 | $0.00094 |
| Haiku 4.5 | $0.00047 | $0.00047 |
Grade A, and why
00-kit-authoring 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 3d 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
Kit authoring (this repo)
You are operating in the @commerce-atoms/agents npm package itself, not a Hydrogen storefront. The shipped product lives under kit/ and has its own per-tool overlays — those rules govern consumer repos, not this one.
Always
- TypeScript only across
src/andbin/. No.js/.mjssource. Noany. Strict mode is non-negotiable. - Run
npm run verifyafter substantive edits to source. Don't disable a check. - Add a test for any behaviour change. Use
node:testandnode:assert/strict. - New / modified content under
kit/must be registered inkit/INDEX.json. The CI stepnpm run lint:jsonrejects missing or broken paths. - Synced markdown's repo-relative links are rewritten by
src/internal/rewrite-links.tsat sync time. Author links naturally.
Never
- Apply storefront rules (anything from
kit/rules/core/*) to this repo's source. Those are for Hydrogen apps. - Run
npm publishfrom a workstation. Releases go via tag +.github/workflows/publish.yml(Trusted Publishing). - Move kit-authoring concerns into
kit/. The split between root (config) andkit/(product) is doctrine — seeCONTRIBUTING.md. - Edit
kit/without first readingkit/AGENTS.mdandkit/reference/conventions.md.
Quick reference
- Releasing:
CONTRIBUTING.md→ "Releasing". - Adding to the kit:
CONTRIBUTING.md→ "Kit content". - ADRs:
kit/docs/decisions/.
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.
- 3d ago First seen · 30 lines · 471 tokens per session scan A d2846c4709df
00-kit-authoring is a cursor rule published in the GitHub repository commerce-atoms/agents (1 stars, last pushed 4mo ago), licensed MIT. It adds 471 tokens to every session, about $0.0024 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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