Brings in #2192 (react-hooks lint over `core/react/`) and #2194. All the code,
`eslint.config.js` and the new root devDependency merged cleanly; three
conflicts, all in files this PR refactored.
- `.github/copilot-instructions.md` — modify/delete again. Kept deleted; the
line v2/main added there restates AGENTS.md rules that arrive in AGENTS.md.
- `AGENTS.md` — two of the three incoming hunks merged cleanly, both of them
RULES, into the sections that survived the refactor: `exhaustive-deps` is
`error` in every React scope including `core/react/**`, and
`set-state-in-effect` now covers `core/react/` with `clients/tui` called out
as the exception. The third was a `validate:core` bullet inside the pre-push
gate section this PR moved wholesale to docs/quality-gate.md, so its mechanism
went there instead — including why the plugin has to be a ROOT devDependency
(Node resolution walks up, not down, so a client-local copy is unreachable).
- `README.md` — the incoming paragraph was added to the quality-gate section
this README no longer carries. Moved verbatim to docs/quality-gate.md, beside
the type-aware-lint paragraph it belongs with.
Ran `npm install` for the new devDependency; `npm run validate` passes.
Signed-off-by: cliffhall <cliff@futurescale.com>
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