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/andreasasprou/agent-skills/opensrcnpx skills add andreasasprou/agent-skills --skill opensrcgit clone --depth 1 https://github.com/andreasasprou/agent-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/skills/andreasasprou/agent-skills/opensrc)<a href="https://agentmods.dev/skills/andreasasprou/agent-skills/opensrc"><img src="https://agentmods.dev/badge/skills/andreasasprou/agent-skills/opensrc.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 | $0.00029 | $0.00387 |
| Opus 5 | $0.00015 | $0.00193 |
| Sonnet 5 | $0.00006 | $0.00077 |
| Haiku 4.5 | $0.00003 | $0.00039 |
Grade C, and why
opensrc scanned grade C with 1 finding 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.
Recursive force deletehighDestructive command
rm -rf with a variable or a broad path is one typo away from removing the wrong tree.
rm -rf opensrc/<package> What it actually says
opensrc
Fetch npm package source code locally when you need to understand implementation details.
When to Use
- Debugging unexpected library behavior
- Understanding internal patterns before extending a library
- Types/docs are insufficient
Commands
# Fetch package(s)
npx opensrc <package>
npx opensrc ai zod @anthropic-ai/sdk
# Check what's fetched
cat opensrc/sources.json
# Clean up when done
rm -rf opensrc/<package>
Exploration Pattern
# 1. Fetch
npx opensrc ai
# 2. Check structure (many are monorepos)
ls opensrc/ai/packages/
# 3. Find what you need
grep -r "functionName" opensrc/ai/src/
# 4. Read the implementation
# (use Read tool)
# 5. Clean up
rm -rf opensrc/ai
Tips
- Check
sources.jsonfirst - don't re-fetch what's already there - Target specific files - don't read entire packages
- Monorepos: Check
packages/directory for subpackages - Clean up - source code takes disk space, remove when done
Common Packages
| Package | Structure |
|---|---|
ai |
Monorepo: packages/anthropic/, packages/openai/, etc. |
@anthropic-ai/sdk |
Single package: src/ |
zod |
Single package: src/types/ |
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 · 68 lines · 29 tokens per session scan C a4bed2b28386
opensrc is a skill published in the GitHub repository andreasasprou/agent-skills (7 stars, last pushed 2mo ago), licensed MIT. It adds 29 tokens to every session and 387 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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