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/aspenkit/aspens/claude-mdgit clone --depth 1 https://github.com/aspenkit/aspensWhat 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 | $0.01029 | $0.01029 |
| Opus 5 | $0.00515 | $0.00515 |
| Sonnet 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 2d 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.
- 2d 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 (96 stars, last pushed 17d ago), licensed MIT. It adds 1,029 tokens to every session, about $0.0051 per session on Opus 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.
Other instructions, from other repositories
liam AGENTS.md
Instructions for liam-hq/liam, covering repository guidelines, project structure & modules, build, test, and development, coding style & naming and testing guidelines.
core copilot-instructions.md
Instructions for asdecided/core: These decisions are already accepted. Do not re-open or contradict them; ask the AsDecided MCP tools (getartifact, searchartifacts) for the full text before proposing a change that touches one.
slideops CLAUDE.md
Instructions for glukicov/slideops, covering claude.md, what this repository is, commands, the demo deck's citations must still match this repo and the citation mechanism (the core idea).
valuein AGENTS.md
AGENTS.md instructions for valuein/valuein, covering agents.md — valuein public oss hub, project, what valuein is, default install + first query (use this verbatim) and either workflow — both work in any virtual environment.
proofpress AGENTS.md
The Governance Layer for Agent-Produced Knowledge.
valuein CLAUDE.md
Claude Code instructions for valuein/valuein, covering claude.md, what this repo is (and isn't), sibling repos — where the actual code lives, commands and with a paid/sp500 token.