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/apache/magpie/list-skillsnpx skills add apache/magpie --skill list-skillsgit clone --depth 1 https://github.com/apache/magpieWhat 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 | $0.00089 | $0.01057 |
| Opus 5 | $0.00044 | $0.00528 |
| Sonnet 5 | $0.00018 | $0.00211 |
| Haiku 4.5 | $0.00009 | $0.00106 |
Grade A, and why
magpie-list-skills 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.
How it starts
The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
list-skills
Print a human-readable index of the skills in this repository.
The index is generated on every run from the live
.claude/skills/*/SKILL.md files — there is no cached copy to
keep in sync. The skill exists for humans (newcomers reading the
repo, maintainers checking what is available); agents route
invocations via the same frontmatter the script reads, so this
skill is purely informational.
Prerequisites
- Python 3.9+ on
PATHwithPyYAMLimportable. The framework's Python toolchain already meets this; no extra setup.
Step 1 — Run the listing script
Run the bundled script and present its output to the user verbatim:
python3 .claude/skills/magpie-list-skills/scripts/list_skills.py
For a layout that puts each description on its own indented line
(easier to read when descriptions are long), pass --verbose:
python3 .claude/skills/magpie-list-skills/scripts/list_skills.py --verbose
The script:
- walks
.claude/skills/*/SKILL.mdrelative to its own location; - parses each skill's YAML frontmatter for
name+description; - groups skills by family prefix (the first hyphen-separated
token, with
pr-managementrecognised as a two-token family — seeKNOWN_TWO_TOKEN_FAMILIES); - prints each skill with the first sentence of its description.
When a new multi-token family appears (e.g. a hypothetical
docs-build-*), add the prefix to KNOWN_TWO_TOKEN_FAMILIES in
scripts/list_skills.py; otherwise the
new skills land under the single-token head.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 117 lines · 89 tokens per session scan A 9bcac608bc6f
magpie-list-skills is a skill published in the GitHub repository apache/magpie (84 stars, last pushed 4d ago), licensed Apache-2.0. It adds 89 tokens to every session and 1,057 once invoked, about $0.0004 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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