The aggregate plugin test originally asserted that every component lacked .codex-plugin/plugin.json. That was correct when omo was only an aggregate Codex namespace: the root manifest owned plugin identity and components were implementation details.
PLUGIN_BUNDLED changes the invariant for rules. The rules component now ships bundled-rules/hephaestus.md and uses a plugin-root marker to resolve bundled resources when it runs as a component package, while Codex still sees the aggregate omo manifest as the installable plugin.
Chose Path A and touched only packages/omo-codex/plugin/test/aggregate.test.mjs. The test now allowlists the rules manifest and still asserts every other component has no plugin manifest, preventing accidental sprawl.
Verified npm test from packages/omo-codex/plugin, bun run test:codex, and bun test src/cli/install-codex/. bun run test:codex exits 0 and covers the Linux, macOS, and Windows Codex adapter code paths.
YeonGyu-Kim
a3567056c0