What is evo-python-library-discovery?

A Python project discovery tool that finds library directories by looking for standard project files such as pyproject.toml or setup.py. It can also summarize a library's public functions and write notes for testing.

Use it to list Python libraries in a directory, inspect their public APIs, and create testing notes.

It avoids manually searching a codebase for Python packages and collecting their structure before testing them.

evo-python-library-discovery — Skill for Claude Code and Codex by Open

Install

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.

Any agent

npx skills add OpenLAIR/OpenSkill --skill evo-python-library-discovery

Clone the repo

git clone --depth 1 https://github.com/OpenLAIR/OpenSkill

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/openlair/openskill/evo-python-library-discovery/github.svg)](https://agentmods.dev/skills/openlair/openskill/evo-python-library-discovery)

Your own site

<a href="https://agentmods.dev/skills/openlair/openskill/evo-python-library-discovery"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-python-library-discovery/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/openlair/openskill/evo-python-library-discovery"><img src="https://agentmods.dev/badge/skills/openlair/openskill/evo-python-library-discovery.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 331 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00056	$0.00331
Opus 5	$0.00028	$0.00166
Sonnet 5	$0.00011	$0.00066
Haiku 4.5	$0.00006	$0.00033

Measured yesterday against content hash 13ab8e93d59c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

evo-python-library-discovery 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 yesterday.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/discover.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

tasks-evolved/setup-fuzzing-py/environment/skills/evo-python-library-discovery/SKILL.md · 37 lines

What it actually says

Python Library Discovery

This skill identifies Python library directories within a given base path and analyzes their public APIs to produce testing notes.

Detection Heuristics

A subdirectory is considered a Python library if it contains any of:

pyproject.toml (modern PEP 517/621 standard)
setup.py (legacy setuptools)
setup.cfg (legacy setuptools config)

Key Functions

find_python_libraries(base_dir) - Scan directory for Python libraries, returns list of absolute paths
analyze_library_api(lib_path) - Analyze a library's public API and structure, returns dict
write_libraries_txt(libs, output_path) - Write discovered libraries to a file
write_testing_notes(lib_info, output_path) - Write testing notes for each library

Usage

import sys
sys.path.insert(0, '/app/environment/skills/evo-python-library-discovery/scripts')
from discover import find_python_libraries, analyze_library_api, write_libraries_txt, write_testing_notes

libs = find_python_libraries("/app")
write_libraries_txt(libs, "/app/libraries.txt")
for lib in libs:
    info = analyze_library_api(lib)
    write_testing_notes(info, f"{lib}/notes_for_testing.txt")

Files

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.

scripts/discover.py 6.5 KB runs code

Changes

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.

yesterday First seen · 37 lines · 56 tokens per session scan A 13ab8e93d59c

Subscribe to this mod's changes

evo-python-library-discovery is a skill published in the GitHub repository OpenLAIR/OpenSkill (90 stars, last pushed 2d ago), licensed Apache-2.0. It adds 56 tokens to every session and 331 once invoked, about $0.0003 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 2026-09-11.

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