| name | universal-skills-marketplace |
| description | Use when building, designing, extending, or consuming the ClaudOpenAI unofficial cross-ecosystem skills marketplace — a Context7-pattern MCP server that bridges Claude Code (.claude-plugin) and OpenAI Codex (.codex-plugin) skill catalogs. Triggers on "universal skills", "skills marketplace", "cross-ecosystem skill", "agentskills", "codex skill", "claude plugin", "plugin.json translator", "skill registry", "skill discovery", "publish skill to both claude and codex", "ClaudOpenAI", "bridge claude and codex". |
| version | 0.1.0 |
Universal Skills Marketplace
Context7 for skills, not docs. One MCP server. Two ecosystems. Unofficial.
Mission
Build, maintain, or extend an unofficial bridge that lets any Claude Code or OpenAI Codex session search one registry for skills originating in either ecosystem, get them back with quality scores + install commands for both CLIs, and load them on demand.
Not affiliated with Anthropic or OpenAI. Identity details in references/00-architecture-overview.md.
Routing table — pick the right reference
| I want to… | Primary reference | Supporting asset / script |
|---|
| Understand the whole system | references/00-architecture-overview.md | assets/diagrams/system-topology.png |
| Learn the SKILL.md open standard | references/01-agentskills-io-spec-walkthrough.md | assets/templates/standalone-SKILL.md.template |
| Author a Claude plugin | references/02-claude-plugin-format.md | assets/templates/claude-plugin.json.template, assets/real-examples/context7-plugin.json |
| Author a Codex plugin | references/03-codex-plugin-format.md | assets/templates/codex-plugin.json.template, assets/real-examples/openai-canva-plugin.json |
| Design MCP tools | references/04-mcp-tool-design.md | assets/templates/mcp-server-index.ts.template |
| Deploy Cloudflare Workers | references/05-cloudflare-workers-playbook.md | assets/templates/wrangler.toml.*.template |
| Design the D1 catalog | references/06-d1-schema-design.md | assets/templates/d1-schema.sql.template |
| Plan R2 content storage | references/07-r2-storage-patterns.md | — |
| Build the upstream indexer | references/08-github-indexer-design.md | scripts/fetch-upstream-catalog.sh |
| Score skill quality 0-100 | references/09-quality-scoring-rubric.md | assets/fixtures/known-good/ |
| Copy what Context7 got right | references/10-context7-architectural-analysis.md | assets/real-examples/context7-*.json |
| Translate between manifest formats | references/11-manifest-translator-algorithm.md | scripts/test-translator.ts, assets/fixtures/lossy-cases/ |
| Verify end-to-end | references/12-verification-playbook.md | scripts/validate.sh |
Phase dispatcher
- Planning / just arrived → read
00-architecture-overview.md, then 10-context7-architectural-analysis.md, then references/11-manifest-translator-algorithm.md (the three anchoring docs)
- Phase 0 — spikes complete → evidence in
/docs/spikes/ (upstream URLs verified, Codex schema derived, rate limits mapped, iCloud strategy documented)
- Phase 1 — schemas + this skill → you are here; running this skill IS Phase 1's deliverable
- Phase 2 — npm package →
packages/mcp-server/ implementation driven by 04-mcp-tool-design.md + 11-manifest-translator-algorithm.md
- Phase 3 — Cloudflare backend → three Workers driven by
05-cloudflare-workers-playbook.md + 06-d1-schema-design.md + 08-github-indexer-design.md
Hard rules (inherited from ../../CLAUDE.md)
- Anti-Fabrication — if a URL, field, or behavior isn't verified against installed plugins or a live upstream, it does NOT ship.
- Anti-Mock-Data — no hardcoded skills anywhere except
assets/fixtures/ and packages/*/tests/fixtures/.
- Verification — "build passed" ≠ acceptance;
curl + fresh Claude Code AND Codex session required.
- Translator loudness — no silent field drops; every lossy translation logs + shims.
- context7 fidelity — plugin wrapper stays trivial; all logic in the npm package.
- Identity — unofficial, independent, community project. Never imply endorsement from either company.
Run before any commit
bash skills/universal-skills-marketplace/scripts/validate.sh
Must exit 0. Checks: frontmatter valid, SKILL.md ≤100 lines, all 12 references present, all templates parse, no broken intra-skill links.
