Borrowing it
Nothing to install: this file belongs to MountainUnicorn/add. 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/MountainUnicorn/add/main/CLAUDE.mdgit clone --depth 1 https://github.com/MountainUnicorn/addWrote 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/mountainunicorn/add/claude-md)<a href="https://agentmods.dev/instructions/mountainunicorn/add/claude-md"><img src="https://agentmods.dev/badge/instructions/mountainunicorn/add/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/mountainunicorn/add/claude-md"><img src="https://agentmods.dev/badge/instructions/mountainunicorn/add/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 | $0.00817 | $0.00817 |
| Opus 5.5 | $0.00327 | $0.00327 |
| Sonnet 5.5 | $0.00163 | $0.00163 |
| Haiku 4.5 | $0.00082 | $0.00082 |
Grade A, and why
add 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ADD Development Guide
This repository contains the ADD (Agent Driven Development) plugin source. The marketing site (getadd.dev) lives in a separate repo: MountainUnicorn/getadd.dev.
Source of Truth
core/ is canonical. plugins/add/ (Claude runtime) and dist/codex/ (Codex runtime) are regenerated by scripts/compile.py on every release. Edit core/, never the generated output — the compile-drift CI will reject PRs that disagree.
See runtimes/claude/CLAUDE.md and runtimes/codex/adapter.yaml for runtime-specific concerns.
Project State
.add/— ADD's own project config (dog-fooding itself)docs/— PRD, milestones, plans, release-signing runbook, codex install guide, infographicspecs/— Feature specificationsreports/— Dashboard snapshots and HTML reportstests/hooks/— Fixture-based tests for hook scripts
Development Workflow
Test the plugin locally without installing:
claude --plugin-dir ./plugins/add
This loads skills, rules, hooks, knowledge, and templates from the compiled output.
After editing core/:
python3 scripts/compile.py # regenerate plugins/add/ + dist/codex/
python3 scripts/validate-frontmatter.py
python3 scripts/compile.py --check # CI parity
bash tests/hooks/test-filter-learnings.sh
Sync to the local marketplace cache so other Claude Code sessions pick up changes:
./scripts/sync-marketplace.sh
Cut a signed release:
./scripts/release.sh vX.Y.Z
Repository Structure
core/ # Source of truth (runtime-neutral)
skills/ # 28 skills — all slash commands
rules/ # 17 auto-loaded behavioral rules (+3 on-demand)
references/ # non-autoloaded reference rules (loaded on-demand)
templates/ # 29 document templates + data manifests
knowledge/ # 5 Tier-1 knowledge files
lib/ # shared library functions used by hooks/skills
security/ # security-related artifacts (threat model, redaction)
schemas/ # 2 JSON Schema validators
VERSION # Canonical version string
runtimes/claude/ # Claude Code adapter (hooks, plugin manifest, CLAUDE.md)
runtimes/codex/ # Codex CLI adapter
plugins/add/ # GENERATED — Claude Code plugin output
dist/codex/ # GENERATED — Codex CLI prompt + AGENTS.md output
scripts/ # compile.py, sync-marketplace.sh, release.sh, validate-frontmatter.py
docs/ # Development documentation
specs/ # Feature specifications
reports/ # Dashboard snapshots
tests/hooks/ # Hook script tests
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 · 90 lines · 817 tokens per session scan A 2ab65bd74553
add CLAUDE.md is an instructions file published in the GitHub repository MountainUnicorn/add (11 stars, last pushed 22d ago), licensed MIT. It adds 817 tokens to every session, about $0.0033 per session on Opus 5.5. 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
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.