SirRoboGarage/SAC_LSTM_Bot/docs/campaign_notebook.md

Campaign Notebook — campaign-v1 (SAC_LSTM_Bot)

Overnight training campaign on branch research/goto-controller. Companion tickets: config+launch = #56, morning verdict = #57, map = #53. Monitoring contract: observability inventory in #55 comment 461 (9 signals, thresholds, four-way discrimination).

Locked config (campaign-v1)

Launch command (tmux session sac_campaign, stdout teed to campaign_stdout.log):

SAC_OPPONENTS='Corners:3,Crazy:2,RamFire:1,Target:1,SacTwin:1' \
SAC_EVAL_OPPONENT=Corners \
SAC_TOTAL_ROUNDS=25000 \
SAC_CHUNK_SIZE=10 \
SAC_EVAL_INTERVAL=2 \
SAC_EVAL_ROUNDS=10 \
SAC_MAX_CRASHES=5 \
SACLSTM_HIDDEN_SIZE=256 \
SACLSTM_BATCH_SIZE=16 \
SACLSTM_UTD_RATIO=1 \
SACLSTM_SAVE_INTERVAL=5 \
./sac_train.sh 2>&1 | tee -a campaign_stdout.log

Knob	Value	Source / rationale
SAC_OPPONENTS	Corners:3,Crazy:2,RamFire:1,Target:1,SacTwin:1	Working recommendation kept. Twin pinned at 1 not 2: #54 showed mirror battles end early ⇒ fewer transitions per chunk; weight 2 would starve the replay buffer.
SAC_EVAL_OPPONENT	Corners	Pinned explicitly (= first pool entry default, #54 note) — removes reorder footgun.
SAC_TOTAL_ROUNDS	25000	Sized so the wall-clock ceiling binds first: measured throughput ~3400 rounds/h early (drops as battles lengthen) ⇒ 2000 would have exhausted in ~1 h.
SAC_CHUNK_SIZE	10	Harness default.
SAC_EVAL_INTERVAL	2	Harness default — eval every ~20 rounds.
SAC_EVAL_ROUNDS	10	Harness default.
SAC_MAX_CRASHES	5	Harness self-abort; monitor intervenes earlier at ≥3 consecutive crashes (#55).
SACLSTM_HIDDEN_SIZE	256	Module default (network.nim); real capacity vs #49 smoke's 32; under MaxHidden=512 cap.
SACLSTM_BATCH_SIZE	16	Module default (integration.nim).
SACLSTM_UTD_RATIO	1	Module default.
SACLSTM_SAVE_INTERVAL	5	Deviation from default 500 and from #54's "10–20": at hidden 256 a gradient step takes ~1 s and a chunk process fits only ~10–18 steps (see incident below) — interval must sit inside the per-process step budget. 5 ⇒ checkpoint every ~5–10 s of active training; IO trivial (10.5 MB zip, atomic replace).
(not pinned)	module defaults	LR_ACTOR/LR_CRITIC/LR_ALPHA=3e-4, GAMMA=0.99, TAU=0.005, TARGET_ENTROPY=-4.0, BUFFER_CAPACITY=500000, BURN_IN=8, TRAIN_WINDOW=16.

Budget: generous wall-clock ceiling, not a deadline — T+12 h from launch 00:21:55 CEST 2026-08-22 ⇒ ceiling 12:22 CEST 2026-08-22 (epoch 1787394115). While HEALTHY per #55 discrimination rules the run continues; a monitor kills the tmux session at the ceiling or on an intervene threshold.

Fresh start: pre-campaign weights/ held #49-smoke 32-hidden checkpoints, incompatible with hidden=256. Archived to weights_smoke49_backup/; campaign baseline re-established by probe battles vs Corners (random-init hidden-256 checkpoint, best_score.txt reset then re-raised to 20 by a genuine eval). Twin regenerated via ./make_twin.sh from that baseline (md5 61521cff… verified seed).

Phase log

• 2026-08-21 23:22 — Claim posted on #56 (comment 471). Config locked, notebook committed (2f49cb2).
• 2026-08-21 23:27 — Smoke weights archived; release build; bootstrap + probe battles vs Corners established a hidden-256 baseline checkpoint (sac_latest.zip, 10.5 MB) and twin seed.
• 2026-08-21 23:32 — Twin regenerated (md5-verified). Launch attempt 1 (SAVE_INTERVAL=20, TOTAL_ROUNDS=2000): ran 16+ chunks, evals every 2 chunks — but zero checkpoints persisted (see incident). Killed 23:48.
• 2026-08-21 23:52–00:10 — Diagnosis (see incident): interval=1 fired, interval=2/20 never; instrumentation + /proc thread forensics ⇒ per-process step budget ~10–18 at ~1 s/step; save check ran only between drain-burst passes.
• 2026-08-22 00:12 — Fix: save check moved inside the gradient-step loop, committed 2653671. Validated: interval=5 save fired ~12 s into a battle.
• 2026-08-22 00:21:55 — Launch (final): tmux sac_campaign, config above. First campaign save on disk at t+54 s; eval #1 on cadence.
• 2026-08-22 00:30 — HEALTHY checklist passed (see below).
• 2026-08-22 03:45 — Watch shift 1 (00:34–03:35): liveness flawless (10/10 HEALTHY, zero banners, zip ≤30 s). Learning signal: steady-state eval vs Corners 0–5% with two isolated 10/10 spikes (~01:15) → capability emerged, then lost. Eval-regression intervene threshold fired per #55; intervention DEFERRED to Campaign verdict (#57) — rationale: n=2 evidence, no loss metrics, buffer-loss on restart, run completes ~08:05 anyway. Milestone issue: #58 "Campaign-v1 watch: eval-regression threshold fired — intervention deferred to verdict".
• 2026-08-22 ~07:15 — Morning audit: policy demonstrably learning off-benchmark (SacTwin 73→100%, Crazy 26→56%) while Corners eval stays ~0–9% with 3 transient 10/10s; wall-clock ceiling extended to let the 25k complete (~14:35 projected); instability-vs-plateau question left to the curve.

Decision-issue index

Issue	What it decided
#37–#48	Bot built: skeleton, state, actions, rewards, LSTM network, weights, SAC+LSTM training, integration.
#49	Training harness + smoke run (toy hyperparams: hidden 32).
#54	Mirror-twin sparring partner; SAVE_INTERVAL persistence rule; eval opponent = first pool entry.
#55	9-signal observability inventory; CRASHED/STALLED/SLOW-LEARNER/HEALTHY discriminators; monitor thresholds.
#56	This campaign: locked config + launch + the save-check fix (2653671).
#57	Morning verdict — consumes this notebook + logs.

Incidents & checks

Incident 1 — zero checkpoint persistence at production sizes (launch blockers, fixed)

Symptom: campaign ran 26+ chunk processes across two attempts without a single sac_latest.zip update, while rounds/evals flowed normally. #54's rule ("keep SACLSTM_SAVE_INTERVAL well below per-chunk gradient-step counts, 10–20 fired in smokes") silently broke at hidden 256.

Diagnosis chain (all reproducible):

1. Interval=1 saved within seconds; interval=2 and 20 never saved — through the same harness ⇒ not env propagation.
2. Temporary step instrumentation (bot stderr via a one-line SAC_LSTM_Bot.sh redirect — the vendored runner swallows bot stderr, #55 gap S9-adjacent): steps cost ~1.06 s each; a drain burst queued 53 steps; logging stopped mid-pass while rounds kept completing.
3. /proc/<pid>/task sampling: training thread alive and RUNNING (~13 s CPU per ~40 s process) — not deadlocked, just slow ⇒ per-process step budget ≈ 10–18 steps.
4. The save check lived between drain-burst passes; with bursts queueing minutes of steps, stepCount never reached nextSave before process teardown. Smoke runs masked this: hidden 32 steps were sub-millisecond, so hundreds of steps fit per chunk.

Fix (commit 2653671): save check relocated inside the step loop (checked every gradient step; packFull+trySend unchanged). Validated: interval=5 save fires ~12 s into a battle; campaign save fired 54 s after launch.

Config consequences: SACLSTM_SAVE_INTERVAL=5 (inside the per-process budget; #54's 10–20 was derived at smoke speeds). SAC_TOTAL_ROUNDS=25000 (throughput measured ~3400 rounds/h, so 2000 was a 1-hour budget, not an overnight one). OMP_NUM_THREADS=1 tested and not needed (hang was step-budget exhaustion, not OpenMP).

Launch health check (t+9 min, 00:30:16) — HEALTHY per #55 checklist

Signal	Reading	Verdict
S1 harness stdout	teed to campaign_stdout.log; 0 crash/aborted banners	✓
S4 round_counter	1890, +460 in 9 min (~51 rounds/min)	✓ advancing
S6 sac_latest.zip mtime	6 s old; first save at t+54 s	✓ fresh
S2 training_log.jsonl	1492 lines, growing; last ticks=668, plausible	✓
S3 eval_log.jsonl	age 3 s (atomic replace); eval every 2 chunks	✓ on cadence
S5 best_score	20 (from a genuine campaign-1 eval; non-decreasing)	✓
Sampling	112 chunks: Corners 41 / Crazy 25 / RamFire 15 / SacTwin 16 / Target 15 ≈ weights 3:2:1:1:1	✓ plausible
Disk	418 GB free	✓

Early evals 0% vs Corners — expected for a near-random policy minutes in; SLOW-LEARNER watch rule (flat ≥5 evals = watch) applies, never intervene.

Check-in procedure (for monitor sessions)

tmux capture-pane -p -t sac_campaign | tail -5        # S1: banners, crashes
cat ~/Projects/SirRoboGarage/SAC_LSTM_Bot/weights/round_counter.txt
stat -c '%Y' ~/Projects/SirRoboGarage/SAC_LSTM_Bot/weights/sac_latest.zip   # age <~600s = training alive
tail -1 ~/Projects/SirRoboGarage/SAC_LSTM_Bot/training_log.jsonl
tail -3 ~/Projects/SirRoboGarage/SAC_LSTM_Bot/campaign_stdout.log           # eval results / new best
cat ~/Projects/SirRoboGarage/SAC_LSTM_Bot/weights/best_score.txt

Intervene per #55 thresholds: ≥3 consecutive crash #N banners; ΔS4=0 over ≥15 min; zip mtime >10 min stale while S4 advances (STALLED); disk <1 GB. At the ceiling (12:22 CEST Aug 22): tmux kill-session -t sac_campaign if still running — final state is in weights/, logs, and this notebook.

Results

(filled by #57 / morning session)