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/imarios/skilltree/claude-mdgit clone --depth 1 https://github.com/imarios/skilltreeWhat 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 | $0.01837 | $0.01837 |
| Opus 5 | $0.00919 | $0.00919 |
| Sonnet 5 | $0.00367 | $0.00367 |
| Haiku 4.5 | $0.00184 | $0.00184 |
Grade A, and why
skilltree 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.
How it starts
The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.
skilltree - Dependency Manager for AI Agent Skills
What is this?
Dependency-aware package manager for AI agent skills (SKILL.md), agents, and Claude Code slash commands. Uses git repos as the registry, resolves transitive dependencies, supports semver version pinning via git tags, and produces lockfiles for reproducible installs.
Docs
docs/
├── specs/
│ ├── spec.md # Core spec: concepts, commands, phases
│ ├── reference.md # Technical: file formats, algorithm, error messages
│ ├── decisions.md # Design decisions (resolved + deferred), open questions
│ └── background.md # Why skilltree, alternatives comparison
├── planning/ # Phase planning docs (hydrogen, helium, etc.)
└── PROJECTS.md # Project tracking
Tech Stack
- Language: TypeScript
- Runtime: Bun (development +
bun build --compilefor single binary) - Also works with: Node.js (
npx skilltree) - Key deps:
simple-git,semver,yaml,commander
Project Structure
skilltree/
├── src/
│ ├── cli.ts # CLI entry point (commander)
│ ├── commands/ # One file per command
│ ├── core/
│ │ ├── manifest.ts # skilltree.yml parsing/writing
│ │ ├── lockfile.ts # skilltree.lock parsing/writing
│ │ ├── resolver.ts # Version resolution (semver constraints)
│ │ ├── graph.ts # Dependency graph + topological sort
│ │ ├── git.ts # Git operations (clone, fetch, tags)
│ │ ├── installer.ts # File copy, symlinks, permissions
│ │ ├── scanner.ts # Dependency detection (regex)
│ │ ├── llm.ts # Optional LLM dependency detection
│ │ └── frontmatter.ts # SKILL.md frontmatter parsing
│ └── types.ts
├── tests/
├── docs/
├── package.json
├── tsconfig.json
└── CLAUDE.md
Development
bun install
pre-commit install
pre-commit install --hook-type post-merge # auto-rebuilds local binary after version bumps
bun test
bun run dev -- install
bun build --compile src/cli.ts --outfile dist/skilltree
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 · 144 lines · 1,837 tokens per session scan A d1aa87a6d03d
skilltree CLAUDE.md is an instructions file published in the GitHub repository imarios/skilltree (2 stars, last pushed 1mo ago), licensed MIT. It adds 1,837 tokens to every session, about $0.0092 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 2026-08-31.
Other instructions, from other repositories
spellbook AGENTS.md
Instructions for majiayu000/spellbook, covering spellbook agent contract, routing, scope rules, threads long-run guardrails and validation.
open-supermarkets AGENTS.md
Instructions for abracadabra50/open-supermarkets, covering agent integration guide, supported frameworks, quick integration, 1. add as skill and 2. agent calls commands.
helm copilot-instructions.md
Instructions for PetePeter/helm, covering gamepad-cli-hub — copilot instructions, project purpose, system overview, data flow pipeline and key controls.
fusion-skills AGENTS.md
AGENTS.md instructions for CrowdStrike/fusion-skills, covering agents.md, what this is, prerequisites, repository structure and skills ecosystem.
aeon CLAUDE.md
Instructions for aeonfun/aeon, covering aeon, how aeon works, strategy, voice and soul file hierarchy (read in this order).
ESAA-Core AGENTS.md
Instructions for elzobrito/ESAA-Core, covering agents.md — contrato operacional codex/esaa, 1. autoridade e termos, 2. cli e runner, ou configure o runner uma vez por sessão and 3. concorrência.