chore: move knip config into config/ and Prettier config into package.json

Continues trimming the repo root so the README is reached with less scrolling.
Root files: 19 -> 15 across both passes.

- knip.json -> config/knip.json, joining eslint.config.js and the vitest
  configs. `npm run knip` now passes --config explicitly. Verified by A/B: the
  run from the new location produces byte-identical findings and the same five
  configuration hints as from the root, so knip resolves its globs relative to
  cwd rather than the config file. Those hints are pre-existing, not caused by
  the move.
- .prettierrc -> the "prettier" key in package.json, a config source Prettier
  reads natively, so editor format-on-save keeps working with no --config flag
  anywhere. Verified live: `npm run format:check` still passes across src/**,
  which it could not if the config had been lost (Prettier's defaults are
  double quotes at 80 columns and would flag nearly every file).

.prettierignore deliberately stays at the root: Prettier resolves it relative
to cwd, so moving it would require threading --ignore-path through every
script and would break editor integration.

Everything else in the root is load-bearing: .editorconfig (walks up from the
edited file), .nvmrc/.npmrc (read from the project root), tsconfig.json (bare
`tsc` discovers it), LICENSE (GitHub license detection), install.sh (its raw
URL is the published one-liner in the README and cannot move without breaking
every copy in the wild), plus the five documented .md files.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.prettierrc

@@ -1,8 +0,0 @@
-{
-  "singleQuote": true,
-  "semi": true,
-  "tabWidth": 2,
-  "printWidth": 120,
-  "trailingComma": "es5",
-  "endOfLine": "lf"
-}

CLAUDE.md

@@ -90,7 +90,7 @@ Codeman is a Claude Code session manager with web interface and autonomous Ralph
 | Continuous typecheck           | `tsc --noEmit --watch`                                                                                                                                                                                         |
 | Watch-mode test                | `npm run test:watch -- test/<file>.test.ts` (always pass a file — bare watch includes the browser suites)                                                                                                      |
 | Test coverage                  | `npm run test:coverage`                                                                                                                                                                                        |
-| Dead-code sweep                | `npm run knip` (config in `knip.json`)                                                                                                                                                                         |
+| Dead-code sweep                | `npm run knip` (config in `config/knip.json`, passed via `--config`)                                                                                                                                          |
 | Rebuild gesture overlay        | `npm run build:gesture` (esbuild `packages/gesture-control/src/codeman/entry.ts` → `src/web/public/gesture/gesture-codeman.js`; commit the result)                                                             |
 | Build the docker agent image   | `node scripts/build-agent-image.mjs` (builds `codeman/agent:base` from `docker/agent.Dockerfile`; prerequisite for Docker cases; `--engine`/`--image`/`--no-cache`)                                            |
 | Gesture playground             | `npm run dev` **in** `packages/gesture-control/` (standalone vite demo, fake tabs)                                                                                                                             |
@@ -102,7 +102,7 @@ Codeman is a Claude Code session manager with web interface and autonomous Ralph
 
 **CI**: `.github/workflows/ci.yml` (push to master/main + PRs, Node 22) runs two jobs: **(1)** `check:lockfile`, `typecheck`, `lint`, `check:frontend-syntax`, `format:check`, then a **server boot smoke test** (`tsx src/index.ts web --port 3151` must answer `/api/status` within 30s); **(2)** the **unit/integration test suite** via `npm run test:ci` (`config/vitest.ci.config.ts` — excludes the browser-driven `test/mobile/**` suite, `perf-*` benchmarks, and 3 Playwright tests). Tests are tmux-safe in CI: `TmuxManager` no-ops all shell commands under `VITEST` (see Testing).
 
-**Code style**: Prettier (`singleQuote: true`, `printWidth: 120`, `trailingComma: "es5"`). ESLint flat config (`config/eslint.config.js`) allows `no-console`, warns on `@typescript-eslint/no-explicit-any`. Ignores: `app.js`, `scripts/**/*.mjs`, `src/web/public/vendor/**`, `scripts/remotion/**`.
+**Code style**: Prettier (`singleQuote: true`, `printWidth: 120`, `trailingComma: "es5"`) — config lives in the **`"prettier"` key of `package.json`**, not a `.prettierrc` (keeps the repo root short; editors read it natively). `.prettierignore` stays at the root because Prettier resolves it relative to cwd. ESLint flat config (`config/eslint.config.js`) allows `no-console`, warns on `@typescript-eslint/no-explicit-any`. Ignores: `app.js`, `scripts/**/*.mjs`, `src/web/public/vendor/**`, `scripts/remotion/**`.
 
 **Prettier scope is deliberately narrow.** `npm run format` globs only `src/**/*.ts` and `src/web/public/**`, and `.prettierignore` then exempts most of `src/web/public/*.js` (app.js, styles.css, index.html, and 14 hand-formatted modules) plus `CLAUDE.md`. Those files are hand-formatted by design; `npm run check:public-assets` and `check:frontend-syntax` are what guard them (NUL bytes + JS syntax), not Prettier. Do not "fix" a file by adding it back to Prettier's scope.
 

package.json

@@ -32,9 +32,17 @@
     "changeset": "changeset",
     "version-packages": "changeset version && npm install --package-lock-only && node scripts/check-lockfile-sync.mjs",
     "check:lockfile": "node scripts/check-lockfile-sync.mjs",
-    "knip": "npx --yes knip@latest",
+    "knip": "npx --yes knip@latest --config config/knip.json",
     "release": "changeset publish"
   },
+  "prettier": {
+    "singleQuote": true,
+    "semi": true,
+    "tabWidth": 2,
+    "printWidth": 120,
+    "trailingComma": "es5",
+    "endOfLine": "lf"
+  },
   "workspaces": [
     ".",
     "packages/*"