Epic: Preemptive name registration for 'agmsg' across plugin/skill ecosystems

[fujibee]

Goal

Reserve the name agmsg in every plugin / skill marketplace and package registry where Claude Code and Codex CLI users would discover and install third-party extensions — before anyone else claims it. Buzz-week defensive work.

Survey of name slots (as of 2026-06-03)

Registry	"agmsg" status	Action
Anthropic official (anthropics/claude-plugins-official)	Curated, no application	Skip — Anthropic-discretion
Anthropic community (anthropics/claude-plugins-community)	Free	Submit via form
Self-host marketplace (fujibee/agmsg repo)	n/a	Add .claude-plugin/marketplace.json
Codex official catalog (openai/skills)	Free	PR to add skills/agmsg/
Codex community (skillregistry.dev)	Free	PR-based submission
npm	Free	Publish stub package
PyPI	Taken by unrelated package (August M R)	Skip — low collision risk, very old unrelated pkg
Homebrew core	Not present	Out of scope for this epic

Action plan (5 child issues)

• Restructure agmsg as a Claude Code plugin — add .claude-plugin/marketplace.json + .claude-plugin/plugin.json so the repo can be added as a marketplace via /plugin marketplace add fujibee/agmsg. Run claude plugin validate. Coexistence story with existing install.sh-based install needs to be decided (likely keep both paths during transition). — child issue forthcoming.
• Submit to Anthropic community marketplace via claude.ai/settings/plugins/submit or platform.claude.com/plugins/submit — requires the plugin restructure above. Approved plugins land in anthropics/claude-plugins-community as agmsg@claude-community.
• PR to openai/skills (Codex official catalog) — add skills/agmsg/SKILL.md adapted to their conventions. Follow contributing.md.
• PR to skillregistry.dev (Codex community registry) — similar structure to above.
• Publish stub package agmsg on npm — points users to https://agmsg.cc / install.sh, prevents squatting. npm publish under fujibee account.

References

• Claude Code plugins docs: https://code.claude.com/docs/en/plugins
• Marketplace schema: https://code.claude.com/docs/en/plugin-marketplaces
• Community marketplace mirror: https://github.com/anthropics/claude-plugins-community
• Codex skills docs: https://developers.openai.com/codex/skills
• Codex official catalog: https://github.com/openai/skills
• Codex community registry: https://skillregistry.dev/

Out of scope for this epic

• Homebrew formula (separate UX consideration)
• PyPI takeover (taken by long-standing unrelated package, low collision risk)
• Other community marketplaces (xiaolai/claude-plugin-marketplace, ananddtyagi/cc-marketplace, etc.) — nice-to-have, not defensive priority

[fujibee]

Child issues filed:

• Restructure agmsg as a Claude Code plugin (.claude-plugin/marketplace.json + plugin.json) #76 — Restructure agmsg as a Claude Code plugin (.claude-plugin/ setup)
• Submit agmsg to Anthropic community plugin marketplace #77 — Submit to Anthropic community marketplace (depends on Restructure agmsg as a Claude Code plugin (.claude-plugin/marketplace.json + plugin.json) #76)
• Submit agmsg to openai/skills Codex official catalog #78 — Submit to openai/skills Codex official catalog (independent)
• Submit agmsg to skillregistry.dev Codex community registry #79 — Submit to skillregistry.dev (independent)
• Reserve 'agmsg' on npm with a stub installer package #80 — Reserve agmsg on npm (independent)

Suggested order:

1. Reserve 'agmsg' on npm with a stub installer package #80 — fastest, lowest blast radius, immediate defensive value
2. Restructure agmsg as a Claude Code plugin (.claude-plugin/marketplace.json + plugin.json) #76 → Submit agmsg to Anthropic community plugin marketplace #77 — chain for Claude Code side
3. Submit agmsg to openai/skills Codex official catalog #78 + Submit agmsg to skillregistry.dev Codex community registry #79 — independent, can run parallel

[fujibee]

Progress so far:

• ✅ Restructure agmsg as a Claude Code plugin (.claude-plugin/marketplace.json + plugin.json) #76 (CC plugin manifests) — merged via feat(plugin): add .claude-plugin/ manifests for Claude Code marketplace (#76) #81
• ⏳ Submit agmsg to Anthropic community plugin marketplace #77 (Anthropic community submission) — ready, requires manual form submission
• ⏳ Submit agmsg to openai/skills Codex official catalog #78 (openai/skills PR) — upstream PR open at Add agmsg skill: cross-agent messaging via SQLite for CLI agents openai/skills#471
• ⏳ Submit agmsg to skillregistry.dev Codex community registry #79 (skillregistry.dev PR) — upstream PR open at Add agmsg skill under ai/ — cross-agent messaging via SQLite vadimcomanescu/codex-skills#6
• ⏳ Reserve 'agmsg' on npm with a stub installer package #80 (npm publish) — bootstrapper repo + code pushed at fujibee/agmsg-npm, awaiting npm publish

[fujibee]

Progress update (2026-06-04):

• ✅ Restructure agmsg as a Claude Code plugin (.claude-plugin/marketplace.json + plugin.json) #76 (CC plugin manifests) — merged via feat(plugin): add .claude-plugin/ manifests for Claude Code marketplace (#76) #81
• ⏳ Submit agmsg to Anthropic community plugin marketplace #77 (Anthropic community submission) — submitted, pending review
• ⏳ Submit agmsg to openai/skills Codex official catalog #78 (openai/skills PR) — open at Add agmsg skill: cross-agent messaging via SQLite for CLI agents openai/skills#471, awaiting upstream review
• ⏳ Submit agmsg to skillregistry.dev Codex community registry #79 (skillregistry.dev PR) — open at Add agmsg skill under ai/ — cross-agent messaging via SQLite vadimcomanescu/codex-skills#6, awaiting upstream review
• ⏳ Reserve 'agmsg' on npm with a stub installer package #80 (npm publish) — bootstrapper repo + code pushed at fujibee/agmsg-npm, awaiting fujibee to run npm publish

Side-effect of #77 prep: PRIVACY.md added via #82 (merged) since the marketplace form requires a Privacy Policy URL.

[fujibee]

Progress (2026-06-04):

• ✅ Restructure agmsg as a Claude Code plugin (.claude-plugin/marketplace.json + plugin.json) #76 CC plugin manifests — merged
• ⏳ Submit agmsg to Anthropic community plugin marketplace #77 Anthropic community submission — submitted, pending review
• ⏳ Submit agmsg to openai/skills Codex official catalog #78 openai/skills PR — upstream PR open (Add agmsg skill: cross-agent messaging via SQLite for CLI agents openai/skills#471)
• ⏳ Submit agmsg to skillregistry.dev Codex community registry #79 skillregistry.dev PR — upstream PR open (Add agmsg skill under ai/ — cross-agent messaging via SQLite vadimcomanescu/codex-skills#6)
• ✅ Reserve 'agmsg' on npm with a stub installer package #80 npm publish — published as agmsg@0.0.1 under fujibee maintainer

3 of 5 actionable items done. Remaining: upstream review on #78/#79, Anthropic review on #77 — all out of our hands now.