docs: drop residual both-binaries framings + stale binary_subcommand doc

hive-ag3nt/src/paths.rs

@@ -57,7 +57,7 @@ pub fn config_dir() -> PathBuf {
 }
 
 /// Claude credentials directory for the current agent. `$HOME/.claude`
-/// matches what the `claude` CLI reads at runtime — both binaries see
+/// matches what the `claude` CLI reads at runtime — the harness sees
 /// the same `$HOME` set by the per-service systemd `environment`
 /// declaration (`/home/<agent>`). Falls back to `/root/.claude` for
 /// dev / test environments where `HOME` isn't set so the previous

hive-ag3nt/src/turn.rs

@@ -126,9 +126,8 @@ impl TurnFiles {
 
 /// Drop the MCP config blob claude reads from `--mcp-config <path>`.
 /// `socket` is the hyperhive per-container socket (forwarded to the child
-/// as `--socket <path>`); `binary_subcommand` is e.g. `"mcp"` for sub-agents
-/// or `"mcp"` for the manager (both binaries name their MCP subcommand the
-/// same — the differentiator is which binary `/proc/self/exe` resolves to).
+/// as `--socket <path>`). The MCP subcommand is always `mcp` on the single
+/// `hive` binary resolved from `/proc/self/exe`.
 ///
 /// # Errors
 ///