Borrowing it
Nothing to install: this file belongs to sebacaro/gandalf. 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/sebacaro/gandalf/main/CLAUDE.mdgit clone --depth 1 https://github.com/sebacaro/gandalfWrote 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/sebacaro/gandalf/claude-md)<a href="https://agentmods.dev/instructions/sebacaro/gandalf/claude-md"><img src="https://agentmods.dev/badge/instructions/sebacaro/gandalf/claude-md.svg" alt="Measured on agentmods" 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 | $0.00578 | $0.00578 |
| Opus 5 | $0.00289 | $0.00289 |
| Sonnet 5 | $0.00116 | $0.00116 |
| Haiku 4.5 | $0.00058 | $0.00058 |
Grade A, and why
gandalf 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 7d 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 — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Gandalf — CLI para Spec Driven Development
Herramienta local para generar specs SDD y estructuras de proyecto en la terminal.
Comandos
# Activar entorno
source venv/bin/activate
# Ejecutar directamente
python main.py --help
python main.py spec
python main.py init
python main.py apply
python main.py verify
# O con gandalf global (después de install.sh)
gandalf spec
gandalf init
gandalf apply
gandalf verify
Tests rápidos
# Smoke test: que el CLI arranca
python main.py --help
# Test de detección de stack
python -c "from src.infrastructure.detectors.file_stack_detector import FileStackDetector; print(FileStackDetector().detect('.'))"
# Test de generación (requiere carpeta temporal)
python -c "
from src.domain.entities.feature_spec import FeatureSpec
from src.application.use_cases.create_feature_spec import create_feature_spec
spec = FeatureSpec(name='Test', slug='test', stack='generic', description='Test feature', context='Test context', new_components='TestComponent', modified_files='main.py', acceptance_criteria=['Given user / When action / Then result'], edge_cases='Empty state', project_path='/tmp/gandalf_test')
ok, files, err = create_feature_spec(spec)
print('OK', files) if ok else print('ERROR', err)
"
Instalación
bash scripts/install.sh
Arquitectura
gandalf/
├── main.py # Entry point
├── src/
│ ├── domain/ # Entidades + interfaces
│ ├── application/use_cases/ # Lógica de cada comando
│ ├── infrastructure/
│ │ ├── detectors/ # Auto-detección de stack
│ │ ├── generators/ # Renderizado Jinja2
│ │ ├── templates/{stack}/ # Templates por stack
│ │ └── cursor/ # Integración con Cursor
│ └── presentation/
│ ├── cli/commands/ # Comandos typer
│ ├── forms/ # Formularios questionary
│ └── ui/display.py # Componentes rich
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.
- 7d ago First seen · 75 lines · 578 tokens per session scan A 68cb817f33dd
gandalf CLAUDE.md is an instructions file published in the GitHub repository sebacaro/gandalf (2 stars, last pushed 3mo ago), licensed MIT. It adds 578 tokens to every session, about $0.0029 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
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
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.
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 oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.