beagle

Name: beagle
Author: existential-birds

Apollo 10 astronaut Thomas P. Stafford pats the nose of a stuffed Snoopy

Image: NASA, Public Domain. Source

A Claude Code plugin marketplace for code review and verification workflows. Catch issues before you push with pre-commit reviews for Python, Go, Rust, Elixir, React, iOS/Swift, and AI frameworks.

Powers the agents in Amelia. For automated review-fix-test loops, see Daydream.

Installation

Prerequisites:

Claude Code CLI installed
agent-browser for the run-test-plan skill (optional)

# 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 confirming the plugin's skills appear.

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 can install the same skills by linking each plugin into ~/.agents/skills/ (see .codex/INSTALL.md).

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	8	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	122

Skills

These are the canonical skill entry points for Beagle. Former command workflows now live as skills.

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

Skill	Plugin	Description
`gen-test-plan`	beagle-testing	Generate YAML test plan
`run-test-plan`	beagle-testing	Execute test plan