feat(fleet): dedicated orchestrator persona (split from planner) + software-delivery lead

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/mosaic/framework/fleet/profiles/software-delivery.yaml

@@ -27,45 +27,49 @@ id: software-delivery
 title: Software Delivery
 description: >-
   The engineering fleet that turns ratified objectives into shipped, reviewed,
-  merged code. The lead (planner — the orchestrator seat) plans phased FRs into a
-  depends_on DAG, decomposition splits them into one-PR-each cards, coders execute
-  to green CI, and review / security-review / site-tester / merge-gate guard the
-  merge. This mirrors today's coding fleet.
-# NOTE: the canonical lead seat is the "orchestrator". In the persona library the
-# orchestrator IS the `planner` class (see roles/planner.md: "the planner role IS
-# the existing orchestrator class") — so the lead/floor reference `planner`, the
-# only class that actually resolves to a role contract.
-lead: planner
+  merged code. The lead (orchestrator) runs the supervisor loop and dispatches
+  ready work; it hands goal-decomposition to the planner, which plans phased FRs
+  into a depends_on DAG, decomposition splits them into one-PR-each cards, coders
+  execute to green CI, and review / security-review / site-tester / merge-gate
+  guard the merge. This mirrors today's coding fleet.
+# NOTE: the lead seat is the dedicated "orchestrator" — the always-on coordinator
+# that runs the supervisor tick, dispatches ready work, and routes PRs to the
+# merge-gate while holding only lean coordination state. The planner is now a
+# distinct seat (heavy goal-decomposition context) that reports to the
+# orchestrator. The two-agent floor is orchestrator + enhancer.
+lead: orchestrator
 floor:
-  - planner
+  - orchestrator
   - enhancer
 roster:
+  - class: orchestrator
   - class: board
-    reports_to: planner
+    reports_to: orchestrator
   - class: planner
+    reports_to: orchestrator
   - class: decomposition
     reports_to: planner
   - class: code
     reports_to: decomposition
     multiplicity: 2
   - class: review
-    reports_to: planner
+    reports_to: orchestrator
   - class: security-review
     reports_to: review
   - class: site-tester
     reports_to: review
   - class: documentation
-    reports_to: planner
+    reports_to: orchestrator
   - class: merge-gate
-    reports_to: planner
+    reports_to: orchestrator
   - class: rebase
     reports_to: merge-gate
   - class: operator
-    reports_to: planner
+    reports_to: orchestrator
   - class: session-review
-    reports_to: planner
+    reports_to: orchestrator
   - class: enhancer
-    reports_to: planner
+    reports_to: orchestrator
 notes: >-
-  Two-agent floor (orchestrator/planner + enhancer) is always staffed; every other
-  seat is added on demand.
+  Two-agent floor (orchestrator + enhancer) is always staffed; every other seat is
+  added on demand.