Credits

Muster's design was inspired by atomic-claude, superpowers, and gsd-core. It vendors a curated set of MIT-licensed skills and agents, with every source and item recorded for attribution.

Vendored sources

Source	License	Provides
obra/superpowers	MIT	Brainstorming, planning, TDD, code-review, debugging, verification skills
wshobson/agents	MIT	Software and knowledge-work agents and skills across many specialties
open-gsd/gsd-core	MIT	Plan, execute, and verify workflow phases
pbakaus/impeccable @ 32930818a109fafa87199babe92fa8e530cff5d3	Apache-2.0	Design workflow vocabulary, context-resolution behavior, and bounded detector inspiration

Every vendored item is listed in vendor/manifest.yaml with its repository, license, and ref, and provenance is written into NOTICE.

Upstream routing on Codex

On Codex, Muster prefers an enabled authoritative upstream implementation over its own copy whenever one exists: the official Superpowers plugin, wshobson's per-plugin Codex skills, and GSD's installer-generated Codex skills.

The bundled sp-*, wsh-*, and muster-gsd-* skills are deterministic fallbacks: they keep every role resolvable when an upstream is absent, and they never implicitly install those providers on your behalf. The pinned compatibility survey — which upstreams were checked, at which refs, including Atomic Codex, Book Genesis, the humanizer sources, and Promptfoo — is recorded in codex/upstreams.json.

Clean-room specialists

Alongside the vendored material, Muster ships its own specialists in plugin/agents/, authored fresh from the role concept:

• muster-surgeon: precise 1-2 file edits
• muster-builder: a cohesive vertical slice
• muster-reviewer: verdict-emitting review
• muster-investigator: read-only locator
• muster-strategist: heavyweight reasoning
• muster-improver: read-only post-run retrospective that proposes self-improvement edits
• muster-runner: single-item lifecycle driver — TDD build, explicit-PASS review gate, receipts-backed PR (the dispatchable subagent form of the runner mode)

Additional inspiration (clean-room, mechanism-level)

A cluster of systems introduced in 0.5.0 -- the sprint coordination protocol (claim/receipt/ledger discipline), the citation-guard gate, QA runbook memory, the voice/audience/brand profile system, newsletter signal-diff, the assumption checker, and the document-ingestion contract -- were designed with mechanism-level inspiration from Nate B. Jones's Unlock AI open-skills/open-engine patterns (unlock-ai.natebjones.com). No code, prose, or configuration was copied; Muster's implementations are original, adapted to its own deterministic-CLI/model-facing-skill architecture.

License

Muster is licensed under Apache-2.0. See LICENSE and NOTICE.

Contributing

Contributions are welcome. See CONTRIBUTING.md to get started.