Add origin-apps plugin: build on the Origin API, port a GitHub App

Merged
AN
13d ago
+458-0

Adds a origin-apps plugin with two skills.

  • origin-api points an agent at the right part of the Origin API docs and lists the handful of rules people get wrong at first (mirrored repositories, event subscriptions, webhook verification, scopes).
  • port-github-app-to-origin runs inside an existing GitHub App and writes a plan for moving it to Origin, including feedback the team can send to Cursor. It is for developers building Origin Apps, with or without a GitHub App to start from.

[!NOTE]
Low Risk
Adds documentation, agent skills, and marketplace manifests only; no application runtime or auth code changes.

Overview
Introduces the origin-apps marketplace plugin (v0.1.0): skills-only guidance for Cursor Origin—registered in .cursor-plugin/marketplace.json, a new .claude-plugin/marketplace.json entry, and the root README plugin table.

origin-api steers agents to live Origin docs (llms.txt, targeted fetches) and enforces “check first” rules (native vs mirrored repos, event subscriptions, webhook verify/dedupe/ack, scopes from the spec, opaque pagination/IDs)—without inventing endpoints from memory.

port-github-app-to-origin is a planning workflow run inside a GitHub App repo: inventory webhooks, API/GraphQL usage, and auth from code; map against the saved spec; emit ORIGIN-PORTING-BRIEF.md and optional ORIGIN-FEEDBACK.md via references/brief.md (gap criteria, GitHub→Origin feature mapping). No code changes unless the user asks after the brief.

Reviewed by Cursor Bugbot for commit 0390402f4dea53c78be71734cd600378b00cd1b6. Bugbot is set up for automated code reviews on this repo. Configure here.