| name | vendor-adapters |
| description | Master cross-vendor reference for LLM vendor harness formats — complete format mapping tables, documentation URLs, known gaps, and the workflow for keeping references current. |
This is the single source of truth for how harness artifacts map across Claude Code, Cursor, and Codex. Use it when comparing vendor behavior, checking format compatibility, or running a vendor sync update.
Vendor Documentation URLs
Claude Code (Anthropic)
OpenAI Codex
Cursor
Cross-Vendor Standards
Vendor Support Matrix
Quick-lookup: what each vendor supports. For format details see references/.
| Artifact | Claude Code | Cursor | Codex |
|---|
| Skills | ✓ full | ✓ full | ✓ full |
| SubAgents | ✓ full | ~ partial (research needed) | ✗ not in plugins |
| MCP | ✓ stdio + HTTP | ✓ stdio + SSE + OAuth | ✓ stdio only |
| Hooks | ✓ 25 events, 4 types | ✓ 25 events, 2 formats | ~ 5 events, command only (experimental) |
| Startup Context | ✓ CLAUDE.md + rules/ | ✓ .cursor/rules/*.mdc | ✓ AGENTS.md only |
| Rules in plugins | ✓ .claude/rules/*.md | ✓ .mdc with frontmatter | ✗ not supported |
| Commands | ✓ legacy (prefer skills) | ✓ commands/*.md | ✗ not supported |
Format Mapping Tables
(See references/ directory for full format details — anthropic.md, cursor.md, codex.md)
Known Gaps
Track gaps in references/vendor-*.md files. Each gap entry:
- Priority: HIGH / MED / LOW
- Description: what's wrong or missing
- Vendor: which vendor
- Status: OPEN / RESOLVED (with resolution note)
Update Workflow
When vendor documentation changes:
- Use fetch-vendor-docs skill to retrieve current docs from URLs above
- Compare against stored references in this skill's references/ directory
- Identify: what changed, what's new, what was removed
- Update affected reference files
- Use flag-vendor-gaps skill to update gap table
