feat(emulate): add Emulate plugin to marketplace

[amondnet]

Summary

• Add Emulate plugin for local drop-in API emulation (Vercel, GitHub, Google, Slack, Apple, Microsoft, AWS)
• Update marketplace configuration in .claude-plugin/marketplace.json
• Add plugin entry to README with install instructions
• Add plugins/emulate to release-please-config.json for versioning

Test plan

• Verify plugins/emulate/.claude-plugin/plugin.json is valid (claude plugin validate plugins/emulate)
• Confirm marketplace entry appears correctly on the web app
• Check install command works: /plugin install emulate@pleaseai

---

Summary by cubic

Adds the emulate plugin to the marketplace for local, drop-in API emulation of Vercel, GitHub, Google, Slack, Apple, Microsoft, and AWS. Install with /plugin install emulate@pleaseai and use it to run emulated services for dev and CI.

• New Features
  • Added marketplace entry for emulate with description, tags, and source path.
  • Added plugin manifest, skill docs, and skills-lock.json under plugins/emulate.
  • Updated README with install instructions and links; added plugins/emulate to release-please-config.json for versioning.

^{Written for commit 03830d4. Summary will update on new commits.}

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Project	Deployment	Actions	Updated (UTC)
claude-code-plugins	Ready	Preview, Comment	Apr 2, 2026 5:11am

[gemini-code-assist]

Code Review

This pull request introduces the emulate plugin, which provides a local drop-in API emulator for various services including Vercel, GitHub, and AWS. The changes include updating the marketplace configuration, adding documentation to the README, and setting up the plugin's metadata and skills. A review comment correctly identified that the author field was missing from plugin.json, which is required for plugins representing external projects to properly credit the upstream organization.

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

Architecture diagram

sequenceDiagram
    participant Agent as Claude Agent
    participant Market as Marketplace Registry
    participant CLI as Emulate CLI (Local)
    participant Core as Emulator Core (Hono/Store)
    participant App as Developer Application

    Note over Agent,Market: Plugin Discovery & Installation
    Agent->>Market: NEW: Fetch metadata for 'emulate'
    Market-->>Agent: Return source path & install command

    Note over Agent,Core: Plugin Execution (Skill Usage)
    Agent->>Agent: Parse SKILL.md for tool definitions
    Agent->>CLI: NEW: Execute 'npx emulate --service github'
    CLI->>CLI: Load emulate.config.yaml (if present)
    CLI->>Core: Initialize Hono server & stateful Store
    Core-->>CLI: Server listening (e.g., :4001)
    CLI-->>Agent: Output: "GitHub emulator started at http://localhost:4001"

    Note over App,Core: Runtime API Emulation
    App->>App: GITHUB_EMULATOR_URL=http://localhost:4001
    App->>Core: Request (e.g., POST /repos/owner/repo)
    Core->>Core: Authenticate via Bearer Token/Seed
    alt Found in Store
        Core->>Core: Update local state (Collection<T>)
        Core-->>App: 201 Created (Mock Data)
    else Missing Data
        Core-->>App: 404 Not Found
    end

    Note over Agent,Core: Control Flow (e.g., Testing)
    Agent->>CLI: NEW: Execute 'emulate reset'
    CLI->>Core: Wipe Store & Replay Seed Data
    Core-->>CLI: Success
    CLI-->>Agent: Store reset to initial state

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