Align maintenance gate and enable project plugins

.claude/settings.json

@@ -0,0 +1,13 @@
+{
+  "permissions": {
+    "allow": [
+      "WebFetch",
+      "WebSearch"
+    ]
+  },
+  "enabledPlugins": {
+    "pyright-lsp@claude-plugins-official": true,
+    "code-simplifier@claude-plugins-official": true,
+    "claude-md-management@claude-plugins-official": true
+  }
+}

CLAUDE.md

@@ -31,7 +31,7 @@ Optional features and installation groups are documented in [`docs/installation.
 
 `maintain.sh` runs dependency freshness and security checks, Ruff, Pyright scoped to `src/`, and the parallel test suite. Full-project Pyright is not the project gate because the ML dependency graph can exhaust Node memory.
 
-The gate does not pass `--ignore-unfixed` to uv-secure, so a transitive CVE with no released fix stops it before Ruff, Pyright and the tests run, which a sibling repository that ignores unfixed findings would not do. The global rule applies: run and report those three separately. Scanner failures are fatal too. Triaged blockers and the recheck procedure: `Known security-gate blocks` in [`docs/development.md`](docs/development.md).
+The gate does not pass `--ignore-unfixed` to uv-secure, so a transitive CVE with no released fix stops it before Ruff, Pyright and the tests run. This matches the global rule: run and report those three separately. Scanner failures are fatal too. Triaged blockers and the recheck procedure: `Known security-gate blocks` in [`docs/development.md`](docs/development.md).
 
 Command, gate, typing, and model-test invariants auto-load from [`.claude/rules/development.md`](.claude/rules/development.md). Environment recovery, CI behavior, and fixture policy live in [`docs/development.md`](docs/development.md).