remove Role::Manager + ManagerSurface + Flavor::Manager — there is only one role: agent

docs/turn-loop.md

@@ -81,26 +81,17 @@ Three subcommands:
 
 ### `Surface` trait + zero-sized type tags
 
-`AgentRequest` / `AgentResponse` and `ManagerRequest` /
-`ManagerResponse` are wire-disjoint, but the turn loop itself
-(boot → recv → drive → ack/requeue → stats → continue-sentinel)
-is identical regardless of role. `bin/hive.rs` factors that
-sameness through a `Surface` trait with two zero-sized impls
-(`AgentSurface`, `ManagerSurface`) wrapping:
+`AgentRequest` / `AgentResponse` (= `ManagerRequest` / `ManagerResponse` —
+type aliases) are the wire types. There is one role: agent.
+`bin/hive.rs` factors the turn loop through a `Surface` trait with one
+zero-sized impl (`AgentSurface`) wrapping:
 
-- Per-role MCP `Flavor` constant (picks which system-prompt block
-  + tool registration goes into the spawned claude).
-- Per-role `forge_notify::run` flag (picks `AgentRequest::Wake`
-  vs `ManagerRequest::Wake` so the broker socket accepts the
-  push).
 - One async method per wire op: `ack_turn`, `requeue_inflight`,
   `inbox_unread`, `post_turn_counts`, `send_to_parent`,
   `self_wake`, `recv_next`, `wake_external`.
 
-`main()`'s dispatch picks `serve_main::<AgentSurface>` vs
-`serve_main::<ManagerSurface>` and the turn logic stays in
-lockstep by construction — there's no separate per-role copy of
-`serve_loop` / `handle_turn` / `wake`.
+`main()` calls `serve_main::<AgentSurface>` for all roles. The turn
+loop (`serve_loop` / `handle_turn` / `wake`) has no per-role branches.
 
 ### Boot wiring
 
@@ -272,14 +263,13 @@ socket at `/run/hive/` once at startup:
   Passed via `--system-prompt-file`.
 
   **Marker grammar.** `<!-- role:X -->` opens a block; matching
-  `<!-- /role:X -->` closes it. Nesting is NOT supported — a stray
-  opener overrides until its closing tag (or end of file). A
-  mismatched closer (`<!-- /role:manager -->` inside a `role:agent`
-  block) is elided from the output but does NOT pop the active
-  role: suppression stays conservative so a typo can't dump
-  wrong-flavor content. Whitespace inside markers is tolerated
+  `<!-- /role:X -->` closes it. The renderer always uses role `agent`.
+  Blocks with other role tags are elided. Nesting is NOT supported —
+  a stray opener overrides until its closing tag (or end of file). A
+  mismatched closer is elided from the output but does NOT pop the
+  active role. Whitespace inside markers is tolerated
   (`<!--role:foo-->` parses the same as `<!-- role:foo -->`).
-  Content outside any marker is always shared.
+  Content outside any marker is always included.
 
   **`hive_identity` / `swarm_identity` shape.** Each carries a
   leading space + backticked name (` on hive \`pr1ma\``,