agentmods.dev

claude-agent-sdk-python CLAUDE.md

Repository instructions for the Python package that provides the Claude Agent SDK. They list the formatting, linting, type-checking, and test commands, plus the main source-code areas.

In plain words
What is it for?
Use them when changing this SDK, then run its Ruff checks, mypy type checks, and pytest test suite.
Why use it?
They provide the project’s expected development checks and a map of where the client, queries, message handling, and subprocess code live.

Instructions file

8.0k +14 today A scan 180 tokens original MIT
View the source file anthropics/claude-agent-sdk-python
Install

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.

agentmods
npx agentmods add instructions/anthropics/claude-agent-sdk-python/claude-md
Clone the repo
git clone --depth 1 https://github.com/anthropics/claude-agent-sdk-python
Per session 180 This file is loaded in full into every session.
When invoked 180 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00180 $0.00180
Opus 5 $0.00090 $0.00090
Sonnet 5 $0.00036 $0.00036
Haiku 4.5 $0.00018 $0.00018

Measured 2d ago against content hash 7aaff076c597, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

claude-agent-sdk-python 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.

CLAUDE.md · 28 lines

What it actually says

Workflow

# Lint and style
# Check for issues and fix automatically
python -m ruff check src/ tests/ scripts/ --fix
python -m ruff format src/ tests/ scripts/

# Typecheck
python -m mypy src/ scripts/

# Run all tests
python -m pytest tests/

# Run specific test file
python -m pytest tests/test_client.py

Codebase Structure

  • src/claude_agent_sdk/ - Main package
    • client.py - ClaudeSDKClient for interactive sessions
    • query.py - One-shot query function
    • types.py - Type definitions
    • _internal/ - Internal implementation details
      • transport/subprocess_cli.py - CLI subprocess management
      • message_parser.py - Message parsing logic
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. 2d ago First seen · 28 lines · 180 tokens per session scan A 7aaff076c597

Subscribe to this mod's changes

claude-agent-sdk-python CLAUDE.md is an instructions file published in the GitHub repository anthropics/claude-agent-sdk-python (8,018 stars, last pushed today), licensed MIT. It adds 180 tokens to every session, about $0.0009 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 2026-08-30.

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