beagle

Image: NASA, Public Domain. Source

Beagle is an Agent Skills marketplace: framework-aware code review, documentation, testing, architectural analysis, and git workflows for any compatible coding agent. Skills cover Python, Go, Rust, Elixir, React, Remix v2, and iOS/Swift.

Install for any agent: npx skills add existential-birds/beagle. Then your agent loads the right skill automatically, or you run one by name (for example review-python).

Pairs with Amelia for agent-based workflows and Daydream for automated review-fix-test loops.

Installation

Prerequisites:

• A coding agent that supports Agent Skills
• agent-browser for the run-test-plan skill (optional)

Any coding agent

Install with the skills CLI:

npx skills add existential-birds/beagle

This downloads the skills and configures them for your agent. Codex users: see .codex/INSTALL.md and docs/README.codex.md.

Claude Code

claude plugin marketplace add https://github.com/existential-birds/beagle
claude plugin install beagle-core@existential-birds

Install additional plugins as needed (for example beagle-python@existential-birds). Update with:

claude plugin marketplace update existential-birds && claude plugin update <plugin-name>

If a marketplace file is reported missing, remove stale entries from ~/.claude/plugins/known_marketplaces.json and restart.

Plugins

Each plugin's README lists its skills. For every skill in one place, see the full catalog.

| Plugin | Coverage | |--------|----------| | beagle-core | Shared workflows, verification, git, skill tooling | | beagle-python | Python, FastAPI, SQLAlchemy, PostgreSQL, pytest | | beagle-go | Go, BubbleTea, Wish SSH, Prometheus | | beagle-elixir | Elixir, Phoenix, LiveView, ExUnit, ExDoc | | beagle-ios | Swift, SwiftUI, SwiftData, iOS frameworks | | beagle-react | React, React Flow, shadcn/ui, Tailwind, Remix v2 | | beagle-rust | Rust, tokio, axum, sqlx, serde | | beagle-docs | Documentation quality, AI-writing detection (Diataxis) | | beagle-analysis | Brainstorming, ADRs, strategy, LLM-as-judge, TDD planning | | beagle-testing | Test plan generation and execution |

Key skills

Your agent discovers every skill automatically; these are the headline ones, grouped by task. The full catalog lists them all.

Code review — review-python, review-frontend, review-remix-v2 (beagle-react); review-go, review-tui (beagle-go); review-rust, review-elixir, review-ios.

Git & feedback — commit-push, create-pr, gen-release-notes, fetch-pr-feedback, respond-pr-feedback, receive-feedback.

LLM artifacts — review-llm-artifacts, verify-llm-artifacts, fix-llm-artifacts.

Docs — improve-doc, draft-docs, ensure-docs, review-ai-writing, humanize-beagle.

Analysis & planning — review-plan, write-adr, brainstorm-beagle, write-plan, quick-plan, llm-judge, strategy-interview, prfaq-beagle, web-research.

Testing — gen-test-plan, run-test-plan.

Skill tooling — skill-builder, review-skill.