beagle
Image: NASA, Public Domain. Source
Beagle is a Claude Code plugin marketplace with 124 skills across code review, documentation, testing, architectural analysis, and git workflows. Use it to review before you push, detect AI-generated artifacts, draft and improve docs, generate test plans, and analyze codebases — across Python, Go, Rust, Elixir, React, iOS/Swift, and AI frameworks.
Used with Amelia for agent-based workflows and Daydream for automated review-fix-test loops.
Installation
Prerequisites:
# Add the marketplace
claude plugin marketplace add https://github.com/existential-birds/beagle
# Install the plugins you need
claude plugin install beagle-core@existential-birds
claude plugin install beagle-python@existential-birds
claude plugin install beagle-react@existential-birds
Verify installation by opening a new Claude Code session and running /beagle-core:commit-push — if the skill loads, the plugin is active.
To update:
claude plugin marketplace update existential-birds && claude plugin update <plugin-name>
Troubleshooting:
- "Marketplace file not found": Remove stale entries from
~/.claude/plugins/known_marketplaces.json and restart Claude Code.
- Plugin not updating: Run
claude plugin marketplace update existential-birds to refresh the marketplace.
Other Agents
Use the skills CLI to install beagle skills for other AI agents:
npx skills add existential-birds/beagle
This downloads the skills and configures them for your agent.
Codex users: Link each plugin into ~/.agents/skills/ — see .codex/INSTALL.md for setup instructions.
Plugins
| Plugin | Skills | Category |
|---|
| beagle-core | 18 | Shared workflows, verification, git |
| beagle-python | 7 | Python, FastAPI, SQLAlchemy, pytest |
| beagle-go | 13 | Go, BubbleTea, Wish SSH, Prometheus |
| beagle-elixir | 11 | Elixir, Phoenix, LiveView, ExUnit, ExDoc |
| beagle-ios | 16 | Swift, SwiftUI, SwiftData, iOS frameworks |
| beagle-react | 16 | React, React Flow, shadcn/ui, Tailwind |
| beagle-rust | 10 | Rust, tokio, axum, sqlx, serde |
| beagle-ai | 13 | Pydantic AI, LangGraph, DeepAgents |
| beagle-docs | 10 | Documentation quality, AI writing detection (Diataxis) |
| beagle-analysis | 8 | Brainstorming, 12-Factor, ADRs, LLM-as-judge |
| beagle-testing | 2 | Test plan generation and execution |
| Total | 124 | — |
Skills
These are the canonical skill entry points for Beagle.
beagle-core
| Skill | Description |
|---|
review-plan <path> | Review implementation plans |
review-llm-artifacts | Detect LLM coding artifacts |
fix-llm-artifacts | Fix detected artifacts |
commit-push | Commit and push changes |
create-pr | Create PR with template |
gen-release-notes <tag> | Generate release notes |
receive-feedback <path> | Process review feedback |
fetch-pr-feedback | Fetch bot comments from PR |
respond-pr-feedback | Reply to bot comments |
skill-builder | Create new skills |
prompt-improver | Optimize prompts |
Code Review Skills
| Skill | Plugin | Description |
|---|
review-python | beagle-python | Python/FastAPI code review |
review-frontend | beagle-react | React/TypeScript code review |
review-go | beagle-go | Go code review |
review-tui | beagle-go | BubbleTea TUI code review |
review-ios | beagle-ios | iOS/SwiftUI code review |
review-elixir | beagle-elixir | Elixir/Phoenix code review |
review-rust | beagle-rust | Rust/tokio/axum code review |
Documentation & Analysis Skills
| Skill | Plugin | Description |
|---|
draft-docs <prompt> | beagle-docs | Generate documentation drafts |
improve-doc <path> | beagle-docs | Improve docs using Diataxis |
ensure-docs | beagle-docs | Documentation coverage check |
review-ai-writing | beagle-docs | Detect AI writing patterns |
humanize | beagle-docs | Fix AI writing with safe/risky classification |
12-factor-apps-analysis | beagle-analysis | 12-Factor compliance check |
llm-judge | beagle-analysis | Compare implementations |
write-adr | beagle-analysis | Generate ADRs from decisions |
Testing Skills