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/bgorzelic/ghostlink/claude-mdgit clone --depth 1 https://github.com/bgorzelic/ghostlinkWhat 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 | $0.01290 | $0.01290 |
| Opus 5 | $0.00645 | $0.00645 |
| Sonnet 5 | $0.00258 | $0.00258 |
| Haiku 4.5 | $0.00129 | $0.00129 |
Grade A, and why
ghostlink 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 — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project
GhostLink is a local-first MCP server (STDIO) for agentic coding workflows on macOS. It exposes deterministic, policy-gated tools (repo + git + curated commands) via structured JSON envelopes.
Current phase: Phase 1 -- Local STDIO (shipped as v0.1.0). Phase 2 (remote transport) and Phase 3 (agent runtime) are designed but not yet built.
Commands
npm install # install dependencies
npm run dev # dev server with watch mode
npm run build # compile TypeScript to dist/
npm start # run compiled server (STDIO)
npm test # run full test suite (vitest, 108 tests)
npm run lint # ESLint
npm run typecheck # tsc --noEmit
Single test file: npx vitest run tests/core/tools/repo-search.test.ts
Single test by name: npx vitest run -t "returns deterministic envelope"
Verification gate (run after every code change):
npm test && npm run lint && npm run typecheck && npm run build
Architecture
src/
index.ts # Entry point (STDIO transport binding)
server.ts # MCP server factory + tool registration (transport-agnostic)
core/
tools/ # Tool implementations (one file per tool)
repo-search.ts # ripgrep-powered search
repo-read-file.ts # File read with size/binary guards
repo-apply-patch.ts # Pure JS unified diff with atomic rollback
repo-run.ts # Curated command runner (allowlist only)
git-status.ts # Normalized git status parser
git-diff.ts # Diff with sandbox validation + output caps
policy/
sandbox.ts # Path canonicalization, traversal rejection, symlink escape detection
commands.ts # Command allowlist registry with per-command arg validation
utils/
envelope.ts # ToolEnvelope builder (ok/error + provenance)
process.ts # Safe process spawning (shell:false only)
logging/
audit.ts # JSONL audit logger (stdout/file/off modes)
types/
tool-envelope.ts # ToolEnvelope<T> type definition
tests/ # Mirrors src/ structure (vitest)
docs/ # Public documentation
templates/ # Ready-to-use config templates for target projects
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 · 117 lines · 1,290 tokens per session scan A c31ac6a0c8b8
ghostlink CLAUDE.md is an instructions file published in the GitHub repository bgorzelic/ghostlink (0 stars, last pushed 27d ago), licensed ISC. It adds 1,290 tokens to every session, about $0.0064 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
OpenSandbox AGENTS.md
AGENTS.md instructions for opensandbox-group/OpenSandbox, covering opensandbox agents, repository map, routing, working principles and guardrails.
microsandbox AGENTS.md
AGENTS.md instructions for superradcompany/microsandbox, covering agents.md, scope, project map, design principles and backward compatibility review.
agentos CLAUDE.md
Claude Code instructions for rivet-dev/agentos, covering agentos, boundaries, security model, sqlite schema ownership and runtime and registry.
moltis CLAUDE.md
Moltis engineering guide for Claude/Codex agents: Rust architecture, testing, security, and release workflows.
OpenSandbox CLAUDE.md
Claude Code instructions for opensandbox-group/OpenSandbox: See AGENTS.md for all rules, routing, and conventions.
agent-sandbox AGENTS.md
Instructions for kubernetes-sigs/agent-sandbox, covering agents.md, project summary, repository layout, agent skills and build, test, lint.