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donkeycar-rl-autoresearch
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fix: save numbered checkpoint every segment, never overwrite 

Every training segment now saves checkpoint_NNNNNNN.zip so the
full training history is preserved on disk. No checkpoint is ever
overwritten. model.zip still updated for crash recovery.

After a 90k-step run with 13 segments you now have:
  checkpoint_0006851.zip   <- step 6,851
  checkpoint_0013702.zip   <- step 13,702
  ...
  checkpoint_0090000.zip   <- step 90,000
  best_model.zip           <- highest scoring segment (reloaded at end)
  model.zip                <- latest weights (crash recovery)

This means we can NEVER again lose a good mid-training model.
If the model was driving at step 30k, checkpoint_0030000.zip exists.

Agent: pi
Tests: 102 passed
Tests-Added: 0
TypeScript: N/A
This commit is contained in:
Paul Huliganga 2026-04-17 22:10:37 -04:00
parent fc01057c14
commit 10719b4ff6
3 changed files with 24 additions and 1 deletions
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7
agent/multitrack_runner.py
View File

@ -335,8 +335,13 @@ def train_multitrack(model, first_env, total_timesteps, steps_per_switch,
if save_dir:
try:
os.makedirs(save_dir, exist_ok=True)
# Save numbered checkpoint — NEVER overwrite previous checkpoints.
# Every segment is preserved so we can return to any point in training.
ckpt_name = f'checkpoint_{steps_done:07d}'
model.save(os.path.join(save_dir, ckpt_name))
# Also overwrite 'model' for crash-recovery (latest weights)
model.save(os.path.join(save_dir, 'model'))
log(f'[W3 Runner] Checkpoint saved at step {steps_done:,}')
log(f'[W3 Runner] Checkpoint saved: {ckpt_name} (step {steps_done:,})')
except Exception as e:
log(f'[W3 Runner] WARNING: checkpoint save failed: {e}')

13
agent/outerloop-results/autoresearch_phase2_log.txt
View File

@ -749,3 +749,16 @@
[2026-04-17 14:45:13] [Champion] 🏆 NEW BEST! Trial 3: mean_reward=90.0000 params={'r': 90}
[2026-04-17 14:45:13] [Champion] 🏆 NEW BEST! Trial 5: mean_reward=75.0000 params={'n_steer': 8}
[2026-04-17 14:45:13] [AutoResearch] Only 1 results — using random proposal.
[2026-04-17 22:10:12] [AutoResearch] GP UCB top-5 candidates:
[2026-04-17 22:10:12] UCB=2.3107 mu=0.3981 sigma=0.9563 params={'n_steer': 9, 'n_throttle': 2, 'learning_rate': 0.001405531880392808, 'timesteps': 26173}
[2026-04-17 22:10:12] UCB=2.3049 mu=0.8602 sigma=0.7224 params={'n_steer': 9, 'n_throttle': 3, 'learning_rate': 0.001793493447174312, 'timesteps': 19198}
[2026-04-17 22:10:12] UCB=2.2813 mu=0.4904 sigma=0.8954 params={'n_steer': 9, 'n_throttle': 4, 'learning_rate': 0.0011616192816742616, 'timesteps': 13887}
[2026-04-17 22:10:12] UCB=2.2767 mu=0.5194 sigma=0.8787 params={'n_steer': 9, 'n_throttle': 4, 'learning_rate': 0.0011646447444663046, 'timesteps': 21199}
[2026-04-17 22:10:12] UCB=2.2525 mu=0.6254 sigma=0.8136 params={'n_steer': 9, 'n_throttle': 3, 'learning_rate': 0.0010196345864901517, 'timesteps': 22035}
[2026-04-17 22:10:12] [Champion] 🏆 NEW BEST! Trial 1: mean_reward=50.0000 params={'n_steer': 5}
[2026-04-17 22:10:12] [Champion] 🏆 NEW BEST! Trial 1: mean_reward=80.0000 params={'n_steer': 7}
[2026-04-17 22:10:12] [Champion] 🏆 NEW BEST! Trial 0: mean_reward=50.0000 params={'r': 50}
[2026-04-17 22:10:12] [Champion] 🏆 NEW BEST! Trial 1: mean_reward=80.0000 params={'r': 80}
[2026-04-17 22:10:12] [Champion] 🏆 NEW BEST! Trial 3: mean_reward=90.0000 params={'r': 90}
[2026-04-17 22:10:12] [Champion] 🏆 NEW BEST! Trial 5: mean_reward=75.0000 params={'n_steer': 8}
[2026-04-17 22:10:12] [AutoResearch] Only 1 results — using random proposal.

5
agent/outerloop-results/autoresearch_phase3_log.txt
View File

@ -400,3 +400,8 @@
[2026-04-17 14:45:26] [Wave3] Only 0 results — using random proposal.
[2026-04-17 14:45:26] [Champion] 🏆 NEW BEST! Trial 3: score=1500.00 (mini_monaco=1500.0) params={'learning_rate': 0.0002, 'steps_per_switch': 8000, 'total_timesteps': 150000}
[2026-04-17 14:45:26] [Champion] 🏆 NEW BEST! Trial 1: score=2000.00 (mini_monaco=2000.0) params={}
[2026-04-17 22:10:26] [Wave3] Seed trial 1/2: using hardcoded params.
[2026-04-17 22:10:26] [Wave3] Seed trial 2/2: using hardcoded params.
[2026-04-17 22:10:26] [Wave3] Only 0 results — using random proposal.
[2026-04-17 22:10:26] [Champion] 🏆 NEW BEST! Trial 3: score=1500.00 (mini_monaco=1500.0) params={'learning_rate': 0.0002, 'steps_per_switch': 8000, 'total_timesteps': 150000}
[2026-04-17 22:10:26] [Champion] 🏆 NEW BEST! Trial 1: score=2000.00 (mini_monaco=2000.0) params={}