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claude-ext: Instructions file for Claude Code

CLAUDE.md

claude-ext CLAUDE.md is an instructions file for Claude Code from claudebot101001/claude-ext. It costs 477 tokens per session, scanned A, original, MIT.

Instruction notes for claude-ext, a framework that extends the Claude Code command-line tool with reusable components called extensions. They describe its structure, design rules, built-in templates, and how to add an extension.

In plain words
What is it for?
Understanding the project layout, following its extension rules, using its templates, and building or maintaining new extensions.
Why use it?
They give contributors a shared reference for changing the framework without breaking its separation between core code and extensions.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions Claude Code.

This is claudebot101001/claude-ext's own configuration. It tells Claude Code how to work on claude-ext itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything claude-ext configures →

not rated 2repo 7mo ago A scan 477 tokens original MIT
View source ↗ claudebot101001/claude-ext
Reuse

Borrowing it

Nothing to install: this file belongs to claudebot101001/claude-ext. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/claudebot101001/claude-ext/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/claudebot101001/claude-ext

Made for: Claude Code.

Wrote 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.

agentmods badge for claude-ext CLAUDE.md

README.md
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Your own site
<a href="https://agentmods.dev/instructions/claudebot101001/claude-ext/claude-md"><img src="https://agentmods.dev/badge/instructions/claudebot101001/claude-ext/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/claudebot101001/claude-ext/claude-md"><img src="https://agentmods.dev/badge/instructions/claudebot101001/claude-ext/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 477 This file is loaded in full into every session.
When invoked 477 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00477 $0.00477
Opus 5.5 $0.00191 $0.00191
Sonnet 5.5 $0.00095 $0.00095
Haiku 4.5 $0.00048 $0.00048

Measured 2mo ago against content hash a08673bfea34, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

claude-ext 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 2mo 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.

CLAUDE.md · 43 lines

What it actually says

claude-ext

Extensible framework for Claude Code CLI. Wraps CLI invocations + manages extension lifecycles.

Deep implementation reference: docs/ARCHITECTURE.md.

Quick Reference

claude-ext/
├── core/               # Stable layer: engine, sessions, bridge, templates, registry
│   ├── templates/      # Built-in YAML + MD template files (coder, reviewer, researcher)
│   └── *.py            # Core modules (never import extensions)
├── extensions/         # Each subdirectory is a self-contained extension
│   └── <ext>/
│       ├── extension.py      # ExtensionImpl(Extension) — entry point
│       ├── mcp_server.py     # MCP stdio server (optional)
│       └── templates/        # Extension-owned YAML + MD templates (optional)
├── config.yaml         # Runtime config (.gitignored, contains secrets)
├── config.yaml.example # Config template with all options documented
└── main.py             # Entry point

Pre-commit: Always ruff format <file> before commit.

Design Principles

  1. Core never imports any extension. Discovery via importlib only.
  2. Extensions never import each other. Use dependencies + engine.services for runtime access.
  3. Each extension is self-contained. Delete directory + remove from enabled = zero impact.
  4. New features = new directories. Modifying core/ or other extensions = abstraction leak.
  5. MCP access is fail-closed. Templates use allowlists. New extensions auto-excluded from restricted templates.

Adding a New Extension

  1. Create extensions/<name>/extension.py with ExtensionImpl(Extension)
  2. Implement start() and stop()
  3. Add to enabled list in config.yaml
  4. (Optional) Add MCP server: create mcp_server.py subclassing MCPServerBase, register in start()
  5. (Optional) Add templates: create templates/*.yaml + .md files, register in start()

No core changes, no other extension changes required.

Changes

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.

  1. 2mo ago First seen · 43 lines · 477 tokens per session scan A a08673bfea34

Subscribe to this mod's changes

claude-ext CLAUDE.md is an instructions file published in the GitHub repository claudebot101001/claude-ext (2 stars, last pushed 7mo ago), licensed MIT. It adds 477 tokens to every session, about $0.0019 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 2026-08-31.

Building agents
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