agent-plugins

Daniel Haven's plugin marketplace for Claude, OpenAI Codex/ChatGPT, and Google Antigravity CLI (agy). Marketplace name: danielh-official-plugins.

Plugin	What it does	Runs on
career-ops	Career Ops job-search tracker in Notion	Claude, Codex, ChatGPT, Antigravity CLI (needs Notion connected)
netnewswire	Ranked, summarized digest of NetNewsWire articles	Claude Code, local Codex, Antigravity CLI on macOS (needs a shell)
calslashd	Calorie-budget stats from Apple Health using the CalSlashD app's formulas	Claude, Codex, ChatGPT, Antigravity CLI on iOS (needs Apple Health access)
linear	Groups Linear issues by topic, flags duplicates, optionally writes labels or parent issues back	Claude, Codex, ChatGPT, Antigravity CLI (needs Linear connected)
ao3	EPUBs for Apple Books from chosen AO3 chapters, fetched or pasted	Fetch: Claude Code, Codex, Antigravity CLI on a Mac. Paste: also the Claude and ChatGPT iPhone apps
quiz-api	Study and write spaced-repetition quizzes via the Quiz API MCP server	Claude Code, Codex, Antigravity CLI (needs your own fork of quiz-api, deployed, with QUIZ_API_URL set)

A plugin is named after the app it is built for (linear:topic-grouper), or after its job when the app is only where its data lives (career-ops:insights, which stores data in Notion). Skills are named after what they do. If you installed notion-career-ops, netnewswire-digest or linear-topic-grouper under their old names, uninstall them and install career-ops, netnewswire or linear instead.

Install

Claude Code

claude plugin marketplace add danielh-official/agent-plugins
claude plugin install career-ops@danielh-official-plugins
claude plugin install netnewswire@danielh-official-plugins
claude plugin install quiz-api@danielh-official-plugins
claude plugin install calslashd@danielh-official-plugins
claude plugin install linear@danielh-official-plugins
claude plugin install ao3@danielh-official-plugins

Or inside a session: /plugin marketplace add danielh-official/agent-plugins, then /plugin install <name>@danielh-official-plugins.

Claude web / desktop

Customize > Plugins > Add > Add marketplace, enter danielh-official/agent-plugins, then install the plugins you want.

Codex CLI

codex plugin marketplace add danielh-official/agent-plugins
codex plugin add career-ops@danielh-official-plugins
codex plugin add netnewswire@danielh-official-plugins
codex plugin add quiz-api@danielh-official-plugins
codex plugin add calslashd@danielh-official-plugins
codex plugin add linear@danielh-official-plugins
codex plugin add ao3@danielh-official-plugins

Antigravity CLI (agy)

agy has a marketplace, but its docs don't cover third-party ones and it can't add this one yet. Clone and install each plugin directory by path:

git clone https://github.com/danielh-official/agent-plugins.git
agy plugin install ./agent-plugins/plugins/career-ops
agy plugin install ./agent-plugins/plugins/netnewswire
agy plugin install ./agent-plugins/plugins/calslashd
agy plugin install ./agent-plugins/plugins/linear
agy plugin install ./agent-plugins/plugins/ao3

quiz-api lives in its own repo; clone it and install plugins/quiz-api by path the same way. Check a package with agy plugin validate <path>.

ChatGPT

Supported workspaces: Admin > Plugins > Add > Import marketplace with https://github.com/danielh-official/agent-plugins. Availability varies by account; admins set authentication policy.

After installing

• Start a fresh session. Installed plugins don't hot-reload.
• Update later: claude plugin marketplace update danielh-official-plugins, then reinstall/update the plugin.
• Notion: connect Notion in each app yourself. Installing doesn't grant access.
• Linear: same as Notion; connect Linear in each app yourself.
• NetNewsWire: macOS only. First run may prompt to let your terminal control NetNewsWire. Click Allow.
• Don't enable two copies of the same skill (older standalone skill, legacy plugin copy). Disable the old one first.

Local development

Clone and add the checkout as a marketplace (use an absolute path):

git clone https://github.com/danielh-official/agent-plugins.git
claude plugin marketplace add /absolute/path/to/agent-plugins
codex plugin marketplace add /absolute/path/to/agent-plugins

Validate from the repo root:

python3 scripts/validate.py
python3 -m unittest discover -s tests -v
python3 -m unittest discover -s plugins/calslashd/scripts -p 'test_*.py' -v
python3 plugins/calslashd/skills/insights/scripts/selfcheck.py
python3 plugins/ao3/skills/ebook/scripts/selfcheck.py
claude plugin validate .

CI runs the same on every push and pull request. Run suites separately; package test module names collide.

scripts/validate.py checks the catalogs and the packaging rules every plugin shares. A plugin's own scripts/validate.py is optional and holds only the rules specific to that plugin; the root runs it when present.

Layout

.claude-plugin/marketplace.json     Claude catalog
.agents/plugins/marketplace.json    Codex/OpenAI catalog
plugins/<name>/
  .claude-plugin/plugin.json
  plugin.json                       Codex/OpenAI + Antigravity manifest
  skills/<skill>/
  scripts/
  README.md
scripts/validate.py
tests/

Both catalogs point at ./plugins/<name>, or at a remote git-subdir source (quiz-api). One canonical skill per plugin serves all four clients. No bundled MCP servers.

Release / add a plugin

• Keep the version in both manifests (.claude-plugin/plugin.json, plugin.json) in sync.
• New plugin: add the full package under plugins/<name>/ (both manifests, skill, OpenAI metadata), list it in both catalogs, then validate. Add a scripts/validate.py and tests only for plugin-specific rules, and add that suite to the workflow.
• Skill wording changes need explicit approval.