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/mvanhorn/last30days-skill/claude-mdgit clone --depth 1 https://github.com/mvanhorn/last30days-skillWhat 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 | $0.00005 | $0.00005 |
| Opus 5 | $0.00003 | $0.00003 |
| Sonnet 5 | $0.00001 | $0.00001 |
| Haiku 4.5 | $0.00001 | $0.00001 |
Grade A, and why
last30days-skill CLAUDE.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 yesterday.
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.
This is a copy
100% identical to deepseek-harness CLAUDE.md — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
@AGENTS.md
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 · 2 lines · 5 tokens per session scan A 336cc4fbf19b
last30days-skill CLAUDE.md is an instructions file published in the GitHub repository mvanhorn/last30days-skill (60,381 stars, last pushed 5d ago), licensed MIT. It adds 5 tokens to every session, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to deepseek-harness CLAUDE.md, differing in 3 lines, and is treated as a copy.
Other instructions, from other repositories
sdp CLAUDE.md
Instructions for dimamak/sdp, covering claude.md, agent guides (read before matching work) and code exploration.
web-search-mcp CLAUDE.md
Instructions for sydasif/web-search-mcp, covering claude.md, common commands, development, testing and architecture.
adhx CLAUDE.md
Instructions for itsmemeworks/adhx, covering claude.md, local configuration, example claude.local.md, github cli and sentry cli.
tweetclaw AGENTS.md
Instructions for Xquik-dev/tweetclaw: Each commit must reduce net handwritten source LOC. No exceptions. No one may waive this rule. Additions require larger, useful simplifications elsewhere in this repository. Formatting, minification, generated files, and deleted valuable tests or docs do not count.
zget AGENTS.md
AGENTS.md instructions for bubroz/zget, covering openspec instructions, ai assistant instructions: zget, key files, run and rules.
x-impact-checker CLAUDE.md
Instructions for tonkotsuboy/x-impact-checker, covering claude.md, project overview, repository structure, core components and skill.md.