Borrowing it
Nothing to install: this file belongs to tamdogood/builder-essential-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/tamdogood/builder-essential-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/tamdogood/builder-essential-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/instructions/tamdogood/builder-essential-skills/agents-md)<a href="https://agentmods.dev/instructions/tamdogood/builder-essential-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/tamdogood/builder-essential-skills/agents-md.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 5.1 | $0.00225 | $0.00225 |
| Opus 5 | $0.00112 | $0.00112 |
| Sonnet 5 | $0.00045 | $0.00045 |
| Haiku 4.5 | $0.00022 | $0.00022 |
Grade A, and why
builder-essential-skills AGENTS.md 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 8d 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
Agent Notes
- When adding a new skill under
skills/<name>/, also createassets/skill-cards/<name>.svgand add the linked card to the README's "Pick a skill" table in the same change.
Cinematic banner typography
- Keep image generation text-free, then composite banner typography locally so every skill uses the exact same type system.
- Render skill titles in Avenir Next Regular, 64 px, with natural tracking.
- Render subtitles in Avenir Next Medium, 18 px, uppercase, with 5 px tracking.
- Use warm parchment
#E8DEC7at 96% opacity for titles and 82% opacity for subtitles, with a 26 px title-to-subtitle gap. - Keep the 1672 x 941 canvas. Placement may move to fit each composition, but font family, weight, sizes, tracking, color, and vertical gap must not vary.
- Use
scripts/render-skill-banner-type.swiftfor the deterministic type pass.
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.
- 8d ago First seen · 19 lines · 225 tokens per session scan A 88950f71746f
builder-essential-skills AGENTS.md is an instructions file published in the GitHub repository tamdogood/builder-essential-skills (191 stars, last pushed 22d ago), licensed MIT. It adds 225 tokens to every session, about $0.0011 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 2026-08-30.
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spec-kit AGENTS.md
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