Compatibility matrix

The offline contract suite is mandatory for every host. A live host check is additional evidence, not a replacement for deterministic package validation.

Host	Recommended channel	Delivered surface	Current verification
Claude Code	Claude marketplace	Skill for four packages; Claude agent for django-reviewer	Isolated structural smoke plus claude plugin validate
Codex	.agents/plugins marketplace	Package-local portable skill	Isolated structural install, update, uninstall, and discovery
Cursor	Cursor marketplace or /add-plugin	Package-local generated skill via explicit manifest path	Official-schema contract and isolated structural discovery; live Cursor Agent unavailable in the maintainer environment
OpenCode	Repository-local .opencode adapter	Canonical root skills/ path	Adapter imported from a copied checkout with Node; local OpenCode CLI unavailable because its own postinstall is incomplete
Agent Skills clients	Direct skills/<id>/ copy	Canonical portable skill	Frontmatter, reference, path, and isolated discovery validation

Behavioral parity

The canonical skill body is identical across portable hosts. Claude's django-reviewer adds only host-specific agent metadata; its generated body is checked against the canonical reviewer skill. Generated package projections are physical copies, not symlinks, so marketplace packages remain self-contained.

Support boundary

The repository prepares manifests and Git-based install surfaces. It does not publish to Claude, Cursor, npm, or another external registry. Host release changes can require a schema refresh; update the compatibility tests before changing an adapter contract.