Cut agent instructions down to what the code can't tell an agent

CLAUDE.md

@@ -1,65 +1,5 @@
 # CLAUDE.md
 
-Guidance for Claude Code (and other coding agents) working in this repository.
-
-## Stack
-
-- TypeScript, package-managed with pnpm 10.33.0
-- oxfmt for formatting, oxlint and ESLint for linting, both configured via `matchory/coding-style`
-- Vitest for tests
-- `tsc` for type checking and for building the published package
-
-## Commands
-
-```bash
-pnpm run fmt            # format the codebase
-pnpm run fmt:check      # check formatting without changing files
-pnpm run lint           # lint with oxlint and eslint
-pnpm run lint:ci        # lint with GitHub-annotated output, for CI
-pnpm run check          # type-check with tsc, no emit
-pnpm test               # run the Vitest suite
-pnpm run build          # emit dist/ via tsconfig.build.json
-pnpm run style:verify   # confirm the project actually consumes the shared presets
-```
-
-`pnpm run style:verify` is the acceptance test for the style wiring specifically. It checks that
-`.editorconfig`, `oxfmt.config.ts`, `oxlint.config.ts`, `eslint.config.js`, and `tsconfig.json` are
-still wired to `@matchory/coding-style`, not that the codebase is correctly formatted, linted, typed,
-tested, or that it builds; `pnpm run fmt:check`, `lint`, `check`, `test`, and `build` cover those
-separately. `--strict` on `style:verify` treats warnings as failures on top of that, nothing more.
-
-## Style configuration lives elsewhere
-
-Formatting and linting rules are not defined in this repository. They come from
-`@matchory/coding-style` and are never edited locally:
-
-- `oxfmt.config.ts` imports and re-exports the package's `oxfmtBase` preset.
-- `oxlint.config.ts` imports and re-exports the package's `oxlintBase` preset.
-- `eslint.config.js` calls the package's `withCore()` to build its config, for the type-aware
-  TypeScript rules oxlint does not yet cover. Delete this file, and drop `eslint` and its plugins
-  from `devDependencies`, once oxlint reaches parity.
-- `tsconfig.json` extends `@matchory/coding-style/tsconfig/base.json`.
-- `.editorconfig` is a synced copy, not authored here. EditorConfig has no way to extend a file
-  shipped inside a package, so it's distributed by copy instead. Refresh it with
-  `npx matchory-coding-style sync` if it ever drifts; never hand-edit it.
-
-## Two tsconfig files
-
-`tsconfig.json` is typecheck-only: the shared preset it extends sets `noEmit: true`, and `pnpm run
-check` runs `tsc --noEmit` against it. It also covers `tests` and `*.config.ts`, so those get type
-checking too. `tsconfig.build.json` extends `tsconfig.json`, restricts `include` to `src`, and turns
-emission back on with `declaration` and `declarationMap` so `pnpm run build` can produce `dist/`.
-Keep the split: merging them either breaks type checking of tests and config files, or stops the
-build from emitting output.
-
-## Vitest stays local
-
-`vitest.config.ts` does not import anything from `@matchory/coding-style`. Test runner setup is
-project-specific build tooling, not a style convention the shared package tracks, so it is
-configured entirely in this repository.
-
-## Claude Code hook
-
-`.claude/settings.json` runs `oxfmt` on a file after every edit, piped through `jq` to extract the
-edited path; if that pipeline fails for any reason the hook no-ops instead of blocking, so formatting
-falls back to whatever runs at `pnpm run fmt` or CI time.
+- Format, lint and tsconfig rules come from `@matchory/coding-style`. Change them there, not with
+  local overrides in this repo's config files. `pnpm run style:verify` only checks that the shared
+  presets are imported, so it will not catch an override.