A local containment profile uses plugins.enabled=false to stop plugin and channel runtime churn. The previous startup path still built plugin lookup tables and doctor stale scans despite the global disable, which made the switch noisy and slow.
Constraint: plugins.enabled=false must leave channel blocker warnings intact while treating stale plugin config as inert.
Rejected: Clear user plugin config automatically | would mutate a reversible containment setting.
Confidence: high
Scope-risk: narrow
Directive: Do not reintroduce plugin registry discovery before checking plugins.enabled.
Tested: pnpm test src/gateway/server-startup-plugins.test.ts src/config/plugin-auto-enable.core.test.ts src/commands/doctor/shared/stale-plugin-config.test.ts src/commands/doctor/shared/preview-warnings.test.ts
Tested: pnpm check:changed
Tested: pnpm build
