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 instructions/byronxlg/skillfold/agents-mdgit clone --depth 1 https://github.com/byronxlg/skillfoldWrote 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/byronxlg/skillfold/agents-md)<a href="https://agentmods.dev/instructions/byronxlg/skillfold/agents-md"><img src="https://agentmods.dev/badge/instructions/byronxlg/skillfold/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 | $0.00233 | $0.00233 |
| Opus 5 | $0.00117 | $0.00117 |
| Sonnet 5 | $0.00047 | $0.00047 |
| Haiku 4.5 | $0.00023 | $0.00023 |
Grade A, and why
skillfold 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 5d 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
Skillfold
Declarative skill manager for Claude config. See CLAUDE.md for the full
project guide (structure, commands, conventions). The block below is managed
by skillfold from skillfold.yaml - edit the manifest, not the block.
Skillfold code conventions
- TypeScript, strict mode, ESM modules. Node stdlib imports use the
node:prefix. - Imports are ordered node stdlib, then third-party, then local, alphabetical within each group. Local imports keep the
.jsextension (NodeNext resolution). - Custom errors extend
SkillfoldErrorand carry messages safe to print directly. - No
any, no unnecessary type assertions. - Network access is injectable (
fetcheroptions) so tests run fully offline. - Run
npm testandnpx tsc --noEmitbefore committing.
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.
- 5d ago First seen · 20 lines · 233 tokens per session scan A b3c218330448
skillfold AGENTS.md is an instructions file published in the GitHub repository byronxlg/skillfold (12 stars, last pushed 3d ago), licensed MIT. It adds 233 tokens to every session, about $0.0012 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.
Other instructions, from other repositories
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AGENTS.md instructions for zackabrah/scopeglass, covering scopeglass contributor instructions, project, commands, conventions and boundaries.
agentic-coding-workflow AGENTS.md
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Instructions for willbytee-sudo/android-qa-kit, covering agents.md — setting up and driving an android device, 1. how to work with the user, 2. start by finding out what's already there, 3. what you can do in each mode and 4. if there's no device: ask first.
yaml-lsp CLAUDE.md
Instructions for zircote/yaml-lsp, covering claude.md, project overview, setup, key files and conventions.