Borrowing it
Nothing to install: this file belongs to aspenkit/aspens. 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/aspenkit/aspens/main/CLAUDE.mdgit clone --depth 1 https://github.com/aspenkit/aspensWrote 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/aspenkit/aspens/claude-md)<a href="https://agentmods.dev/instructions/aspenkit/aspens/claude-md"><img src="https://agentmods.dev/badge/instructions/aspenkit/aspens/claude-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/aspenkit/aspens/claude-md"><img src="https://agentmods.dev/badge/instructions/aspenkit/aspens/claude-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 | $0.01029 | $0.01029 |
| Opus 5.5 | $0.00412 | $0.00412 |
| Sonnet 5.5 | $0.00206 | $0.00206 |
| Haiku 4.5 | $0.00103 | $0.00103 |
Grade A, and why
aspens 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 1mo 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.
This is a copy
88% identical to aspens AGENTS.md — 34 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.
How it starts
The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.
aspens
Skills
.claude/skills/base/skill.md— Base repo skill; load whenever working in this repo..claude/skills/agent-customization/skill.md— LLM-powered injection of project context into installed agent templates viaaspens customize agents.claude/skills/claude-runner/skill.md— Claude/Codex CLI execution layer — prompt loading, stream-json parsing, file output extraction, path sanitization, skill file writing, and skill rule generation.claude/skills/cli-shell/skill.md— Top-level Commander wiring, welcome screen, missing-hook warning, CliError exit handling, and the public programmatic API surface.claude/skills/codex-support/skill.md— Multi-target output system — target abstraction, backend routing, content transforms for Codex CLI and future targets.claude/skills/doc-impact/skill.md— Context health analysis — freshness, domain coverage, hub surfacing, drift detection, LLM-powered interpretation, and auto-repair for generated agent context.claude/skills/doc-sync/skill.md— Incremental skill updater that maps git diffs to affected skills and optionally auto-syncs via a post-commit hook.claude/skills/import-graph/skill.md— Static import analysis that builds dependency graphs, domain clusters, hub files, git churn hotspots, and file priority rankings.claude/skills/repo-scanning/skill.md— Deterministic repo analysis — language/framework detection, structure mapping, domain discovery, health checks, and import graph integration.claude/skills/save-tokens/skill.md— Token-saving session automation — statusline, prompt guard, precompact handoffs, session rotation, and handoff commands for Claude Code.claude/skills/skill-generation/skill.md— LLM-powered generation pipeline for Claude Code skills and CLAUDE.md — doc-init command, prompt system, context building, and output parsing.claude/skills/template-library/skill.md— Bundled agents, commands, hooks, and settings that users install viaaspens add,aspens doc init, andaspens save-tokensinto their .claude/ directories
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.
- 1mo ago First seen · 51 lines · 1,029 tokens per session scan A 16f4935da0d3
aspens CLAUDE.md is an instructions file published in the GitHub repository aspenkit/aspens (103 stars, last pushed 1mo ago), licensed MIT. It adds 1,029 tokens to every session, about $0.0041 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 88% identical to aspens AGENTS.md, differing in 34 lines, and is treated as a copy.
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