musher-sdk 0.2.0

Python SDK for the Musher bundle distribution platform

Musher Python SDK

Python SDK for the Musher bundle distribution platform. Pull versioned AI agent asset bundles (prompts, configs, tool definitions) into your Python applications.

Installation

pip install musher-sdk

Quick Start

import musher

# Explicit token
musher.configure(token="your-token")

bundle = musher.pull("myorg/my-bundle:1.0.0")

for asset in bundle.files():
    print(f"{asset.logical_path}: {len(asset.text())} chars")

Async

async with musher.AsyncClient() as client:
    bundle = await client.pull("myorg/my-bundle:1.0.0")

Sync

with musher.Client() as client:
    result = client.resolve("myorg/my-bundle:1.0.0")
    asset = client.fetch_asset("asset-id", version="1.0.0")

Configuration

Credential Chain

The SDK resolves credentials automatically in this order:

1. Environment variables — MUSHER_API_KEY
2. OS keyring — host-scoped service musher/{hostname}
3. File fallback — <data_dir>/credentials/<host_id>/api-key (must be 0600 permissions)

Registry URL

The registry URL is resolved from environment variables:

• MUSHER_API_URL
• Default: https://api.musher.dev

Programmatic Configuration

import musher

# All parameters are optional — omitted values auto-discover
musher.configure(
    token="your-token",
    registry_url="https://custom.dev",
    cache_dir=Path("/tmp/cache"),
)

Cache Behavior

The SDK uses a content-addressable disk cache:

• Blobs are stored by SHA-256 hash (shared across registries)
• Manifests and refs are partitioned by registry hostname
• Manifests have a configurable TTL (default 24h); refs default to 5min
• clean() removes expired entries and garbage-collects unreferenced blobs

What's Implemented

• resolve() — resolve bundle references to manifests
• fetch_asset() — fetch individual assets by ID
• pull() — resolve + fetch all assets + verify checksums
• Sync (Client) and async (AsyncClient) clients
• Content-addressable cache with TTL and garbage collection
• Typed handles: skills, prompts, toolsets, agent specs
• export_claude_plugin() — export bundle as a Claude plugin
• install_claude_skills() — install skills to a directory

License

Apache-2.0