Package the agent-skill suite as a Claude Code and Codex plugin

[shaug]

TL;DR

Package all eight interdependent agent skills as one installable Claude Code and Codex plugin.

Summary

• Add runtime-native plugin manifests and repository marketplace catalogs for Claude Code and Codex
• Keep the repository root as the shared plugin payload so skills, scripts, review contracts, and adapter metadata install together
• Add deterministic package validation to local checks and CI, including shared version and required-resource checks
• Document plugin installation and the preserved per-skill installation paths

Design decisions

• Use one logical agent-scripts plugin with matching 0.1.0 manifests for both runtimes
• Include carve-changesets with the seven original workflow and review skills
• Keep this release skills-only; no root-level Claude agents, hooks, MCP servers, or apps are added

Validation

• just format
• just lint
• just test (238 tests)
• just check
• claude plugin validate .
• Codex plugin-creator validator
• Isolated-profile marketplace add and plugin install on Claude Code 2.1.92 and Codex CLI 0.145.0, with all eight skills and bundled resources present
• Packaged review-correctness smoke invocation on the standalone regression fixture
• Repository-owned review-code-change: clean at b7ec1b593b9d211cd91101d94d0406c355b2ecd7

Tickets

Fixes #37