self-review 2026-07-30: auto_term stopword filter, real idle_ms, bounded beginSession

- awareness.el: curiosity auto_term was the raw first word of a WM
  label with no term-quality scoring — observed seeds included What,
  Colon, Prose, Context. Replaced the 7-word genre blocklist whack-a-
  mole with a delimited stopword membership test (function words +
  document-structure words); topical terms pass untouched. Verified
  live: seeds now ReasonEdit, Reasoning-model, Self-review.
- routes.el + awareness.el: idle counter only reset on rare inbox
  synthesis-requests, so idle==pulse always (zero information).
  handle_request now stamps soul.last_activity_ts on every inbound
  HTTP request; heartbeat emits idle_ms = ms since last request
  (-1 until first request of a boot).
- neuron-api.el: beginSession concatenated a depth-2 spread plus the
  unbounded self-hub neighbor dump — multi-MB response, doubled by
  wrapper re-escaping, socket died on every call. Now depth-1 and
  the hub dump dropped (identity loading has its own tool). Verified:
  beginSession returns instead of closing the socket.

dist/routes.c

@@ -10,6 +10,7 @@ el_val_t mem_remember(el_val_t content, el_val_t tags);
 el_val_t mem_recall(el_val_t query, el_val_t depth);
 el_val_t mem_search(el_val_t query, el_val_t limit);
 el_val_t mem_strengthen(el_val_t node_id);
+el_val_t mem_tombstone(el_val_t node_id);
 el_val_t mem_forget(el_val_t node_id);
 el_val_t mem_consolidate(void);
 el_val_t mem_save(el_val_t path);
@@ -63,6 +64,7 @@ el_val_t engram_compile(el_val_t intent);
 el_val_t distill_transcript(el_val_t transcript);
 el_val_t json_safe(el_val_t s);
 el_val_t current_engine_note(el_val_t model);
+el_val_t bounded_persona_floor(void);
 el_val_t build_system_prompt(el_val_t ctx, el_val_t chat_mode);
 el_val_t hist_append(el_val_t hist, el_val_t role, el_val_t content);
 el_val_t hist_trim(el_val_t hist);
@@ -137,6 +139,9 @@ el_val_t api_nonempty(el_val_t s);
 el_val_t api_or_empty(el_val_t s);
 el_val_t api_persisted(el_val_t id);
 el_val_t api_not_persisted(el_val_t id);
+el_val_t tombstone_node(el_val_t id);
+el_val_t tombstoned_id_set(void);
+el_val_t memory_hide_tombstoned(el_val_t raw, el_val_t path);
 el_val_t handle_api_begin_session(el_val_t body);
 el_val_t handle_api_compile_ctx(el_val_t body);
 el_val_t handle_api_remember(el_val_t body);
@@ -180,11 +185,6 @@ el_val_t session_hist_save(el_val_t session_id, el_val_t hist);
 el_val_t session_update_meta_timestamp(el_val_t session_id);
 el_val_t session_auto_title(el_val_t session_id, el_val_t first_message);
 el_val_t handle_session_approve(el_val_t session_id, el_val_t body);
-el_val_t init_soul_edges(void);
-el_val_t load_identity_context(void);
-el_val_t seed_persona_from_env(void);
-el_val_t emit_session_start_event(void);
-el_val_t layered_cycle(el_val_t raw_input);
 el_val_t flag_true(el_val_t body, el_val_t key);
 el_val_t rate_limit_check(el_val_t ip, el_val_t path);
 el_val_t strip_query(el_val_t path);
@@ -438,6 +438,7 @@ el_val_t handle_connectors(el_val_t method, el_val_t clean, el_val_t body) {
 
 el_val_t handle_request(el_val_t method, el_val_t path, el_val_t body) {
   el_val_t clean = strip_query(path);
+  state_set(EL_STR("soul.last_activity_ts"), int_to_str(time_now()));
   el_val_t ip = env(EL_STR("REMOTE_ADDR"));
   if (!str_eq(ip, EL_STR(""))) {
     el_val_t rl_result = rate_limit_check(ip, clean);