BT411/scratchpad/SESSION_HANDOFF_20260803.md

Session handoff — 2026-08-03 (armor visibility + eject arm chain)

Committed this session (all on master, exe deployed to content/)

• fe48acc #87 root cause: zone-level replication send was missing — the binary's effect watcher (FUN_0042aa2c) ForceUpdates on BAND-THRESHOLD crossings (master-gated); the port only had the gstate branch. Observers saw 0.0 forever. Fixed + 2-node verified (replicant peaks == master finals to 4 decimals).
• 440cee1 #87 dig closure: host response is LINEAR (raw re-read @004573e4/@00457784, 0.1 literal at call site); the pixel curve was i860 DIV-CARD firmware (flush_material @0048d4d4 just marshals) — logged in open-questions. Field claim reconciled: one 25-pt hit snaps a 77-pt arm 0→0.325 (measured; snap is visible, 2-pt ERS creep is not). Bench: BT_WALK_ZONES filter (legwalk.sh), BindArmourDamage ORPHAN inventory (0 orphans).
• 8165cee #118 eject alive: the evaluator's per-frame caller found by E8-scan — FUN_004a9b5c (Mech MASTER PERF, export hole)+0x10 calls @0049fa1c every frame. Restored at top of Mech::PerformAndWatch (master-gated). Mislabel swept: mech+0x414 = ejectPermitted (NOT missionReviewMode; real review mode = GLOBAL DAT_004fd550). Verified: gen-kill → panic-arm mode ON → miniconsole Panic button LIGHTS (pixel proof panicbtn.png) → punch-out → respawn disarms. BT_EJECT_LOG=1 logs edges. Also: msg id 0x1a = DuckRequest@0049fa00 latches mech+0x398 — NO reader in image (vestigial).
• 0089b32 G = Flush binding (was: action existed, NO key bound — desktop players could never flush!) + BT_FLUSH_HOLD= scalpel.

IN FLIGHT — the user's firsthand eject test (they asked, then had to shut down)

Dry run result (content/fl.log): full flush drains the TANK to 0/14 in ~30 s but does NOT arm eject — InjectCoolant moves tank coolant INTO the loops (bank RISES); idle heat draw won't burn the loops below the 5% arm threshold in minutes. Firsthand recipe to give the user next session (needs build with 0089b32 — exe in content/ is current, but the DIST zip is not):

1. Solo (play_solo), get in.
2. HOLD G until the COOLANT RES gauge hits 0 (~30 s; flush cloud + audio confirm).
3. Then run HOT: hold fire (lasers) continuously / keep moving. With the tank dry the loops burn coolant with no refill. Watch coolant bars fall.
4. When the bank crosses 5%: the Panic button (bottom-left panel) lights bright — press it (or Backspace = key Back action Eject) → punch-out. Faster alternates that also arm: lose all 4 generators; or (novice sim) leg-gimp. OPEN: how long step 3 takes firsthand (not yet measured — the 3-min idle bench never armed; sustained fire should be much faster). If it's tediously long, consider whether weapon heat actually draws LOOP coolant in our reconstruction (#100/#120 territory — check ConsumeCoolant path under fire before telling testers "minutes").

Next-session queue

1. Give the user the firsthand recipe above (they explicitly asked to test it).
2. Time-to-arm under sustained fire — bench it (fire scalpel + BT_COOL_LOG) BEFORE promising the recipe works in reasonable time.
3. Cut dist 717: carries score fix, 28 Hz, eject core+arm chain, #119, #124 triangle pick, #87 replication send, G-flush binding. Testers verify: missile snap darkening visible in MP now; eject lamp + punch-out.
4. Gitea: #87 and #118 both commented + awaiting-verification (labels set). #118 note says flash-vs-solid lamp is answerable if pod veterans remember blinking (GaugeAlarm SetAlertState overlay — not authored for panic in shipped streams as far as checked).
5. Carried: #55, #100 (reservoir drain — RELATED to step 2 above), #120 (flush floor — note: our tank DID reach 0/14, so the floor report may be the LOOP levels, not the tank), #121-#123, #125-#130; mover-gravity dt-less lead in open-questions.

Bench inventory added today

• scratchpad/night10/zonewalk.sh (A now has BT_ARMOR_LOG + BT_SHOT_EVERY=zwA) — the standing zone-replication receipt bench; digest_walk.py reads it.
• scratchpad/night10/legwalk.sh — leg/foot concentrated audit (BT_WALK_ZONES=leg,foot).
• scratchpad/night10/armorpx.sh — BT_ARMOR_FORCE 0/1 pixel A/B.
• BT_EJECT_LOG, BT_FLUSH_HOLD, BT_WALK_ZONES, armor ORPHAN dump (BT_ARMOR_LOG).
• Proof artifacts in content/: panicbtn.png, forceladder.png, snapdiff.png, legdiff.png, dollcrop_*.png (all disposable).

KB updated (all committed)

combat-damage §Zone-LEVEL replication + snap-vs-creep fidelity boundary; decomp-reference §4 (effect watcher cluster) + EJECT ARM CHAIN entry; multiplayer (band-granularity observer model); test-harness (zone-walk armor receipts); open-questions (i860 DIV-CARD firmware ask).

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EVENING SESSION ADDENDUM (the eject sprint + the MFD corruption arc)

Eject system — COMPLETE and firsthand-verified (commits 8165cee..7872254)

• Arm chain per-frame (FUN_004a9b5c+0x10, E8-scan) [T1]; mislabel swept (mech+0x414 = ejectPermitted; review mode = GLOBAL DAT_004fd550).
• EjectPilot @0049f854 confirmed via the image message table ('EjectPilot' id 0x19); DuckRequest = id 0x1a @0049fa00 (mech+0x398 latch, NO reader — vestigial).
• KEY FINDING: eject was UNFINISHED in shipped 4.10 — the evaluator had zero callers/pointers until the master-perf call was restored; the arcade never armed.
• Inputs, all live: Panic button (0x3D→pilot-keypad wire), NUMPAD = pilot keypad (CONTROLS.MAP keypad pilot bindings), Backspace/pad action, and the eng-page EJECT key (0x0B/0x23/0x03) page-gated in the RIO drain [T3 intent-completion]. MFD soft keys otherwise keep authored functions (streamed .CTL: no 0x200000 records — the 109-record dump is the proof).
• Generator destruction → stateAlarm 4 (GeneratorOut, renamed from placeholder) [T3 inferred link] → the AUTHORED invite trail flashes (gotoEngineering 0x80 + engEject 0x85, alarm conditions 4/5).
• KeypressMessageID pinned to binary 0x19 (chain arithmetic gave 0x17 — the armed press was silently swallowed; two mapper ids 0x17/0x18 remain unreconstructed).

The MFD corruption arc (gotcha #27) — RESOLVED

Root cause = MY two new draws, not eject logic: (1) the eject-wipe gauge scribbling a shared ENG/weapon composite plane during eject cycles (re-stubbed, class kept in btl4gaug for a proper FUN_004c5fb8 draw-op RE); (2) the full-face flash overlays (L4VB16 + L4GLASSWIN, both REMOVED — the side buttons are big under-surface rects; the protruding edge IS the lamp; DrawDevSurface's bound texture turned un-reset fills into gauge-atlas stripes). Pixel-verified clean under full stress; edge lamp 0x27 square-waves 34.0↔28.9 across captures = the flash works at authentic scale.

Next-session queue (no release went out tonight)

1. Cut dist 717 after a fresh operator pass on 0535a7a-era build.
2. Eject-wipe draw-op RE (FUN_004c5fb8 view vtbl+0x58 arg roles) → un-stub the slot graphic.
3. The eng-page label-vs-lamp position question: operator saw the flash beside GEN-MODE, not EJECT, on one page — cross-check the DRAWN eng-page layout (streamed gauge pages) against kBTEngBankTop math per bank.
4. Authentic generator death (combat crits / overload, not the scalpel) reaching state 4/5 — then the [T3] MarkGeneratorOut bridge can be checked against the real transition site (MechSubsystem::TakeDamage/OnAlarmChanged cluster RE).
5. Flash presentation: the edge-lamp scale is the design; if the operator wants more presence it is a DELIBERATE glass-layer decision (discuss, don't impose).