docs: turn_stats sink + event-driven agent badges + dashboard event vocabulary

CLAUDE.md

@@ -45,9 +45,19 @@ hive-c0re/         host daemon + CLI (one binary, subcommand-dispatched)
   src/crash_watch.rs    poll every 10s; fire HelperEvent::ContainerCrash
                          when a previously-running container disappears
                          without an operator-initiated transient
+  src/container_view.rs ContainerView struct + build_all helper;
+                         shared between dashboard.rs (cold-load via
+                         /api/state) and coordinator.rs's
+                         rescan_containers_and_emit
   src/coordinator.rs    shared state (broker/approvals/operator_questions/
                          transient/sockets) + tombstone enumeration +
-                         kick_agent + notify_agent (helper-event push)
+                         kick_agent + notify_agent (helper-event push) +
+                         last_containers cache + rescan_and_emit diff helper
+  src/open_threads.rs   loose-ends aggregator (pending approvals +
+                         unanswered questions) — for_agent (filtered) and
+                         hive_wide (manager surface). Backs
+                         AgentRequest::GetOpenThreads + ManagerRequest::
+                         GetOpenThreads (the get_open_threads MCP tool).
   src/actions.rs        approve/deny/destroy (transient-aware)
   src/auto_update.rs    startup rebuild scan + ensure_manager +
                          meta::lock_update_hyperhive bump
@@ -85,6 +95,9 @@ hive-ag3nt/        in-container harness crate; produces TWO binaries
   src/client.rs         generic JSON-line request/response over unix socket
   src/web_ui.rs         per-container axum HTTP page (incl /api/cancel,
                          /api/compact, /api/model, /events/history)
+  src/turn_stats.rs     per-turn analytics sink (one sqlite row per
+                         turn at /state/hyperhive-turn-stats.sqlite);
+                         schema + best-effort writer
   src/events.rs         LiveEvent + broadcast Bus + sqlite-backed history
                          (/state/hyperhive-events.sqlite) + TurnState +
                          model selection (persisted at /state/hyperhive-model)
@@ -193,6 +206,34 @@ Prune freely.
   domain tooling — the agent flake's `inputs` block pulls
   the external flake, `agent.nix` references it via
   `flakeInputs.<name>.packages.${pkgs.system}.default`.
+- **Just landed:** per-turn analytics sink. New
+  `hive-ag3nt::turn_stats` writes one row per claude turn to
+  `/state/hyperhive-turn-stats.sqlite`: identity (model,
+  wake_from, result_kind), timing (started/ended_at,
+  duration_ms), cost (full token-usage breakdown), behaviour
+  (tool_call_count + per-tool JSON map), and post-turn snapshot
+  metrics (open_threads_count, open_reminders_count fetched via
+  the existing GetOpenThreads + new CountPendingReminders RPC).
+  Both ag3nt + m1nd bin loops capture, both Bus accumulates
+  tool_use blocks via observe_stream during the stdout pump.
+  Writes are best-effort. No host-side vacuum yet — TODO under
+  Telemetry; same shape as events_vacuum, target 90d retention.
+- **Just landed:** agent web UI event-driven badges. New
+  `LiveEvent::StatusChanged / ModelChanged / TokenUsageChanged
+  / TurnStateChanged` variants replace the per-agent page's
+  /api/state polling for the state row. Status/model/token/state
+  badges all update from SSE; /api/state only fetched on cold
+  load + during the login flow (session output isn't event-
+  shaped). Per-agent endpoints (`/api/cancel|compact|model|
+  new-session`, `/login/*`) all flip 303→200. New `alive-badge`
+  chip carries the harness reachability signal (replaces the
+  "● harness alive" paragraph); new `ctx-badge` mirrors Claude
+  Code's bottom-right "N tokens" indicator. Every chip carries
+  a `title=...` tooltip for hover detail.
+- **Just landed:** events_vacuum simplified to age-only —
+  `KEEP_SECS = 7d`, no row cap. Chatty turn no longer evicts
+  a quiet day's history sooner than expected. Hourly sweep
+  unchanged.
 - **Just landed:** Phase 6 container events. New
   `DashboardEvent::ContainerStateChanged { container }` +
   `ContainerRemoved { name }` close the last refetch loop on the