diff --git a/elements/neuron/appunti/2026-06-29-tripartite-synapse_v17.md b/elements/neuron/appunti/2026-06-29-tripartite-synapse_v17.md
index 6267e4d..1194706 100644
--- a/elements/neuron/appunti/2026-06-29-tripartite-synapse_v17.md
+++ b/elements/neuron/appunti/2026-06-29-tripartite-synapse_v17.md
@@ -514,9 +514,9 @@ DAY | bAP:                                                 // second action-cont
 DAY | NOT_bAP:                                             // respond to arrived input (the defining deed)
     a = sat(glutamate, K_AMPA)
     AMPA_current = a × AMPA_surface;  Vm += AMPA_current;  post_budget -= AMPA_cost   // SOURCE 1 AMPA
-    post_fast_trace += AMPA_Ca·AMPA_current
+    post_fast_trace += AMPA_Ca·AMPA_current                                          // @cut affords: channel-opening frequency, response magnitude (quantity of response) [ms]
     if Vm > Mg_eject and glutamate > 0:                                              // SOURCE 2 NMDA (Mg relieved)
-        post_fast_trace += NMDA_Ca(glutamate) × sat(astro_Dserine, K_Ds)·rise_speed();  post_budget -= NMDA_cost
+        post_fast_trace += NMDA_Ca(glutamate) × sat(astro_Dserine, K_Ds)·rise_speed();  post_budget -= NMDA_cost   // @cut affords: THE pre-post-astro COINCIDENCE — joint three-component read (glutamate × depolarisation × D-serine gain); the meeting-site owning none of its inputs [ms, three-component space]
         // D-serine sets the GAIN (how strongly POST responds), not a coincidence gate — dialed by the astrocyte
         retro_NO += NO_emit(post_fast_trace);  post_budget -= NO_synth_cost           // EMIT + "responsive target"
     if Vm > eCB_thr:
@@ -530,14 +530,14 @@ DAY | NOT_bAP · recovered:                                 // Ca extrusion + Mg
 // ===== PREPARATION (shape the next response AND the NIGHT) =====
 DAY | quiet:                                               // sustained quiet
     // for NIGHT: climb the tag; dopamine is the integrable coincidence (#3)
-    if post_fast_trace > Ca_TAG: post_possible_tag += post_fast_trace;  post_budget -= pka_cost
+    if post_fast_trace > Ca_TAG: post_possible_tag += post_fast_trace;  post_budget -= pka_cost   // @cut affords: participation / consistency of co-activity (running average) [min]
     if dopamine > dop_thr and post_possible_tag > tag_thr:
-        post_tag += dopamine × post_possible_tag           // token minted for NIGHT
+        post_tag += dopamine × post_possible_tag           // token minted for NIGHT   // @cut affords: structural-consolidation need (precision pathway; dopamine-gated) [hr→night]
     // for the NEXT RESPONSE: STP fill / STD drift
     if post_fast_trace > Ca_STP:
         if post_budget < traffic_cost:                     // FUEL shortfall → endurance (a PREPARATION deposit)
             if post_fast_trace > traj_thr and post_fast_trace_rising:
-                post_endurance_need += post_fast_trace
+                post_endurance_need += post_fast_trace     // @cut affords: stamina / sustained-load need (endurance pathway) [min]
         else if AMPA_surface < post_structure.slot_ceiling:
             AMPA_surface += Ca_insert(post_fast_trace);  post_budget -= traffic_cost
         // else: surface at slot_ceiling → structure-limited (not endurance)
@@ -589,7 +589,7 @@ NIGHT | replay + measure + prime:
             post_fast_trace += NMDA_Ca(glutamate) × sat(astro_Dserine, K_Ds)   // SAME NMDA machinery (D-serine = gain)
         if post_budget < traffic_cost:                     // SAME capacity check → endurance evidence
             if post_fast_trace > traj_thr: post_endurance_need += post_fast_trace   // SAME trace, fed by replay
-    post_participation = level(post_fast_trace)            // read replayed response as participation
+    post_participation = level(post_fast_trace)            // read replayed response as participation   // @cut IS A READING: level() buckets the continuous trace into HIGH/MEDIUM/LOW — a chosen 3-bin quantity cut, kept executable because the build/release decision depends on it (see logic_of_aggregations: participation cut)
     // MEDIUM: prime responsiveness (AMPA occupancy) from the standing tag
     post_spont_thr = spont_thr_base − thr_gain × post_tag
     if post_tag > prime_thr: