docs: drop stale two-loop/two-binary framings (single hive serve loop)

docs/turn-loop.md

@@ -298,8 +298,8 @@ socket at `/run/hive/` once at startup:
 
 The shared per-turn plumbing lives in `hive_ag3nt::turn::{write_mcp_config,
 write_settings, write_system_prompt, run_turn, drive_turn,
-emit_turn_end, wait_for_login, compact_session}` so the two binaries
-can't drift.
+emit_turn_end, wait_for_login, compact_session}` — the single code path
+every agent role runs through.
 
 ### Agent icon
 

hive-ag3nt/src/serve_common.rs

@@ -50,9 +50,9 @@ pub struct TurnRowArgs<'a> {
     pub open_reminders_count: Option<u64>,
 }
 
-/// Assemble a `TurnStatRow` from the harness's per-turn state. Used by both
-/// the agent and manager serve loops — the shape is identical, only the
-/// post-turn count fetch helpers differ (and those stay in each binary).
+/// Assemble a `TurnStatRow` from the harness's per-turn state. Lives here
+/// (rather than inline in the `hive` serve loop) so it stays wire-type-free
+/// and unit-testable; the binary just feeds it the post-turn counts.
 #[must_use]
 pub fn build_row(args: TurnRowArgs<'_>) -> TurnStatRow {
     let TurnRowArgs {

hive-ag3nt/src/turn.rs

@@ -294,7 +294,7 @@ fn compact_watermark_tokens(bus: &Bus) -> u64 {
 ///   compact. This keeps a later turn from hitting the reactive path (where
 ///   there is no chance to save anything first).
 ///
-/// Both the sub-agent and manager loops call this.
+/// Called once per turn by the `hive` serve loop (every agent role).
 pub async fn drive_turn(prompt: &str, files: &TurnFiles, bus: &Bus) -> TurnOutcome {
     maybe_auto_reset(bus);
     let outcome = match run_turn(prompt, files, bus).await {
@@ -441,8 +441,8 @@ fn maybe_auto_reset(bus: &Bus) {
     bus.request_new_session();
 }
 
-/// Emit the per-turn `TurnEnd` event + log line. Single owner so the
-/// agent and manager loops agree on outcome semantics.
+/// Emit the per-turn `TurnEnd` event + log line. Single owner so outcome
+/// semantics stay consistent across every agent role.
 pub fn emit_turn_end(bus: &Bus, outcome: &TurnOutcome) {
     match outcome {
         TurnOutcome::Ok | TurnOutcome::Compacted | TurnOutcome::PromptTooLong => {