Borrowing it
Nothing to install: this file belongs to spf13/go-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/spf13/go-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/spf13/go-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/spf13/go-skills/agents-md)<a href="https://agentmods.dev/instructions/spf13/go-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/spf13/go-skills/agents-md/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/instructions/spf13/go-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/spf13/go-skills/agents-md.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 | $0.00418 | $0.00418 |
| Opus 5.5 | $0.00167 | $0.00167 |
| Sonnet 5.5 | $0.00084 | $0.00084 |
| Haiku 4.5 | $0.00042 | $0.00042 |
Grade A, and why
go-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 today.
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
Go Skills (spf13/go-skills) — Agent Instructions
Source repository for spf13's Go Agent Skills marketplace. The skills table in README.md lists every skill.
Repository Layout
- Each top-level skill directory contains a
SKILL.mdwith YAML frontmatter (name,description) and a.claude-plugin/plugin.json. .claude-plugin/marketplace.jsonis the Claude Code marketplace manifest. Keep it in sync whenever a skill is added, renamed, or removed.CONTRIBUTING.mdlists every rule CI enforces. Read it before changing a skill or a manifest.
Checks
Run these before committing. CI runs the same set, plus a link check of README.md and CONTRIBUTING.md; a monthly workflow checks each skill's current through Go X.Y claim against the latest Go release (check_go_release.py, see CONTRIBUTING.md).
python3 -m unittest discover -s .github/scripts
python3 .github/scripts/check_invariants.py
python3 .github/scripts/validate_manifests.py
python3 .github/scripts/check_skill_code.py # needs the latest stable Go on PATH
(cd .github/claims && go test ./...)
Using these skills from a local clone
Skills are plain directories, so a local clone can serve any agent that reads a skills directory:
- Link each skill into the agent's skills directory (for example
~/.agents/skills/<skill>), as the README describes. Edits to a linkedSKILL.mdtake effect immediately on that machine. - If you sync skills across machines with a linking tool, re-run its sync after adding, renaming, or removing a skill so new links are created and stale ones removed. Editing an existing skill needs no re-sync.
- Other machines pick up changes with
git pull --ff-onlyin their clone, followed by the sync step when skills were added, renamed, or removed.
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.
- today Changed · -13 lines · -488 tokens per session scan B → A d6adbc94d9ec
- 13d ago First seen · 43 lines · 906 tokens per session scan B 945e8c7231f9
go-skills AGENTS.md is an instructions file published in the GitHub repository spf13/go-skills (697 stars, last pushed yesterday), licensed MIT. It adds 418 tokens to every session, about $0.0017 per session on Opus 5.5. 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 2026-10-25.
go-skills AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| go-skills AGENTS.mdspf13/go-skills | Instructions file | 697 | yesterday | MIT | A | 418 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |