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/copilot-instructionsgit 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 | $0.01361 | $0.01361 |
| Opus 5 | $0.00681 | $0.00681 |
| Sonnet 5 | $0.00272 | $0.00272 |
| Haiku 4.5 | $0.00136 | $0.00136 |
Grade A, and why
aspens copilot-instructions.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.
How it starts
The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Copilot Instructions
What This Project Does
aspens is a CLI tool that generates and maintains AI-ready documentation (skills and guidelines) for any codebase. It scans a repo's tech stack, then uses Claude to produce structured markdown "skill files" that Claude Code loads automatically when working in that codebase.
aspens scan # detect tech stack (current dir)
aspens doc init --dry-run # preview generated skills
aspens doc init --mode chunked # generate one domain at a time
aspens doc sync --commits 3 # update skills from last 3 commits
aspens doc sync --install-hook # auto-sync on every commit
Project Setup
npm install # installs commander, @clack/prompts, picocolors
npm link # makes `aspens` available globally for testing
No build step. No test runner configured yet — tests/ is empty.
Architecture
bin/cli.js # entrypoint — welcome screen + subcommands via commander
src/
index.js # barrel exports
commands/
scan.js # pretty/JSON output of scanner results
doc-init.js # full pipeline: scan → mode select → Claude → write
doc-sync.js # diff-based skill updates + git hook installer
add.js # placeholder (Phase 4)
lib/
scanner.js # deterministic tech stack detection (no LLM)
context-builder.js # assembles repo context (used by doc-sync, available for API mode)
runner.js # wraps `claude -p` CLI; prompt loading; output parsing; path sanitization
skill-writer.js # writes parsed {path, content} files to disk
prompts/
doc-init.md # all-at-once init prompt (tool-first: "read before writing")
doc-init-domain.md # single domain skill prompt (for chunked mode)
doc-init-claudemd.md # CLAUDE.md generation prompt
doc-sync.md # sync prompt (diff → skill updates)
partials/ # skill-format.md, guideline-format.md, examples.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.
- 2d ago First seen · 126 lines · 1,361 tokens per session scan A 79b28c78ae94
aspens copilot-instructions.md is an instructions file published in the GitHub repository aspenkit/aspens (96 stars, last pushed 17d ago), licensed MIT. It adds 1,361 tokens to every session, about $0.0068 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 2026-08-30.
Other instructions, from other repositories
Skill_Seekers CLAUDE.md
Instructions for yusufkaraaslan/Skill_Seekers, covering claude.md, project overview, essential commands, required before running tests or cli (src/ layout) and run all tests (never skip - all must pass before commits).
docs-to-pdf CLAUDE.md
Instructions for jean-humann/docs-to-pdf, covering claude development guide for docs-to-pdf, project overview, development environment setup, using mise (recommended) and install mise (if not already installed).
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.
backend.ai AGENTS.md
AGENTS.md instructions for lablup/backend.ai, covering ai coding agent guidelines, document structure (agents.md / knowledge.md), writing style, document index and absolute rules (global).
alcove AGENTS.md
Instructions for epicsagas/alcove, covering claude.md, repository purpose, actual location, structure and karpathy 3-layer architecture.
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).