feat(fleet): mosaic fleet regen — regenerate roster-derived projections (PR3 of #791) (#813)

packages/mosaic/src/commands/fleet.ts

@@ -44,6 +44,7 @@ import {
   registerFleetReconcilerCommands,
   type FleetReconcilerCommandDeps,
 } from './fleet-reconciler-command.js';
+import { registerFleetRegenCommand } from './fleet-regen-command.js';
 import { resolveCommsBlock } from '../fleet/comms-onboarding.js';
 import {
   applyPreparedAgentEnvironmentProjection,
@@ -2063,6 +2064,18 @@ export function registerFleetCommand(program: Command, deps: FleetCommandDeps =
     reconcileDeps: deps.reconcileDeps,
   });
 
+  // Recovery (#791 PR3): rebuild roster-derived env projections from the roster
+  // SSOT. Projection-only and preview-first — never issues a lifecycle restart.
+  registerFleetRegenCommand(cmd, {
+    runner,
+    mosaicHome: deps.mosaicHome,
+    // Resolve personas the SAME way reconcile does: forward any configured roots
+    // so a custom-persona-root deployment cannot have reconcile accept a roster
+    // that regen then rejects against the default `<mosaicHome>/fleet/roles`.
+    rolesDir: deps.reconcileDeps?.rolesDir,
+    overrideDir: deps.reconcileDeps?.overrideDir,
+  });
+
   return cmd;
 }