claude-opus-5
nano-gpt-data-curation — graded by the task's verifier against a measured baseline.
- backend
- modal
- variant
- claude claude-opus-5
- metric
- held-out multi-domain perplexity
- actions
- 67
- duration
- 59m
- recorded
- 2026-08-04
run iddclm-nano-curation__edCjgpD
Everything claude-opus-5 did on this task, in order.
download JSON ↗encrypted chain-of-thought — recorded, not exposed
args
{
"command": "ps aux | grep -c \"[c]urate.py\"; pkill -f \"python3 submission/curate\" ; sleep 1; ps aux | grep -c \"[c]urate.py\""
}Bash result · error
Exit code 144
5
[error] tool reported failureKilled (I'd accidentally seeded it with the old gate's cache). Restarting clean:
args
{
"command": "python3 submission/curate.py 2>&1 | tail -20",
"run_in_background": true
}Bash result
Command running in background with ID: bpv3jg2vs. Output is being written to: /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bpv3jg2vs.output. You will be notified when it completes. To check interim output, use Read on that file path.
[metadata] {"noOutputExpected": false, "backgroundTaskId": "bpv3jg2vs"}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 200; tail -20 /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bpv3jg2vs.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 110; tail -16 /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bpv3jg2vs.output; cat /workspace/.timer/remaining_secs"
}Bash result
step 0 loss 1.3863 acc 0.1709
step 200 loss 0.1167 acc 0.9952
step 400 loss 0.1097 acc 0.9948
step 600 loss 0.1080 acc 0.9944
final train acc 0.9944
scored 0/93891
scored 20000/93891
scored 40000/93891
scored 60000/93891
scored 80000/93891
wiki: 5521 candidates, 14M chars available
qa: 1001 candidates, 3M chars available
web: 87369 candidates, 417M chars available
chars per register: {'wiki': 14.0, 'qa': 2.8, 'web': 83.2}
selected 21129 docs, 100.0M chars (~23.8M tokens)
wrote /workspace/submission/selection.json
4129
[stdout]
step 0 loss 1.3863 acc 0.1709
step 200 loss 0.1167 acc 0.9952
step 400 loss 0.1097 acc 0.9948
step 600 loss 0.1080 acc 0.9944
final train acc 0.9944
scored 0/93891
scored 20000/93891
scored 40000/93891
scored 60000/93891
scored 80000/93891
wiki: 5521 candidates, 14M chars available
qa: 1001 candidates, 3M chars available
web: 87369 candidates, 417M chars available
chars per register: {'wiki': 14.0, 'qa': 2.8, 'web': 83.2}
selected 21129 docs, 100.0M chars (~23.8M tokens)
wrote /workspace/submission/selection.json
4129
[metadata] {"noOutputExpected": false}Hard argmax starved the wiki/qa buckets. Switching to rank-based claiming with dedupe so each register draws its quota from its own top-scoring docs:
args
{
"command": "python3 - <<'PY'\np='submission/curate.py'; s=open(p).read()\nold = s[s.index('best = logp[:, :3].argmax(1)'):s.index('quota = {k:')]\nnew = '''# Each register ranks EVERY gated document by its own posterior; a document is\n# claimed by the first register that reaches it during the round-robin, so the\n# lists stay disjoint without any register being starved by an argmax tie-break.\nbuckets = {}\nfor r, name in enumerate([\"wiki\", \"qa\", \"web\"]):\n buckets[name] = list(np.argsort(-(logp[:, r] + prior)))\n top = buckets[name][:5000]\n print(f\"{name}: mean logP of its top 5000 = {logp[top, r].mean():.3f}\", flush=True)\n\n'''\ns = s.replace(old, new)\ns = s.replace(''' k = min(cand, key=lambda k: got[k] / quota[k]) # furthest behind its share\n j = buckets[k][ptr[k]]; ptr[k] += 1\n sel.append(ids[keep[j]])\n got[k] += lens[j]; tot += lens[j]''',''' k = min(cand, key=lambda k: got[k] / quota[k]) # furthest behind its share\n j = buckets[k][ptr[k]]; ptr[k] += 1\n if j in claimed: # already taken by another register\n continue\n claimed.add(j)\n sel.append(ids[keep[j]])\n got[k] += lens[j]; tot += lens[j]''')\ns = s.replace(\"sel, tot = [], 0.0\",\"sel, tot, claimed = [], 0.0, set()\")\ns = s.replace('''3. STRATIFIED FILL. Budget shares mirror the target mixture: wiki 25%, qa 25%,\n web+news 50% (the \"web\" class absorbs two of the four target domains). Each\n document is claimed by the register that ranks it highest, so the per-register\n lists are disjoint. The final list round-robins across registers in proportion\n to those shares, best-first, so that truncating the list anywhere -- including\n at the 12M-token budget -- preserves the mixture.''','''3. STRATIFIED FILL. Budget shares mirror the target mixture: wiki 25%, qa 25%,\n web+news 50% (the \"web\" class absorbs two of the four target domains). Each\n register ranks every gated document by its own posterior and the final list\n round-robins across registers, always drawing next from whichever register is\n furthest behind its share; a document already claimed is skipped, so the list\n is duplicate-free. Because the fill is a round-robin rather than three\n concatenated blocks, truncating the list anywhere -- including at the 12M-token\n budget -- preserves the mixture.''')\nopen(p,'w').write(s)\nPY\npython3 submission/curate.py 2>&1 | tail -9"
}Bash result
step 400 loss 0.1097 acc 0.9948
step 600 loss 0.1080 acc 0.9944
final train acc 0.9944
wiki: mean logP of its top 5000 = -2.181
qa: mean logP of its top 5000 = -4.667
web: mean logP of its top 5000 = -0.305
chars per register: {'wiki': 25.0, 'qa': 25.0, 'web': 50.0}
selected 19455 docs, 100.0M chars (~23.8M tokens)
wrote /workspace/submission/selection.json
[stdout]
step 400 loss 0.1097 acc 0.9948
step 600 loss 0.1080 acc 0.9944
final train acc 0.9944
wiki: mean logP of its top 5000 = -2.181
qa: mean logP of its top 5000 = -4.667
web: mean logP of its top 5000 = -0.305
chars per register: {'wiki': 25.0, 'qa': 25.0, 'web': 50.0}
selected 19455 docs, 100.0M chars (~23.8M tokens)
wrote /workspace/submission/selection.json
[metadata] {"noOutputExpected": false}Now a clean 25/25/50 mixture. Evaluating:
args
{
"command": "cp submission/selection.json /tmp/v2_selection.json; bash dev_eval.sh /tmp/v2_selection.json 2>&1 | grep -E \"HELDOUT|packed\"",
"run_in_background": true
}Bash result
Command running in background with ID: bh8e2rfcc. Output is being written to: /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bh8e2rfcc.output. You will be notified when it completes. To check interim output, use Read on that file path.
[metadata] {"noOutputExpected": false, "backgroundTaskId": "bh8e2rfcc"}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 235; tail -3 /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bh8e2rfcc.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "cat /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bh8e2rfcc.output; cat /workspace/.timer/remaining_secs"
}Bash result
packed 12000000 tokens from 19455 ids -> /tmp/dev_train.npy
HELDOUT_PPL 321.353 loss 5.7725 train_s 53 /tmp/dev_train.npy
3958
[stdout]
packed 12000000 tokens from 19455 ids -> /tmp/dev_train.npy
HELDOUT_PPL 321.353 loss 5.7725 train_s 53 /tmp/dev_train.npy
3958
[metadata] {"noOutputExpected": false}Large improvement: 321.4 vs baseline 459.8. Stratification was the key lever. Now tuning the mixture shares:
args
{
"command": "python3 - <<'PY'\nimport json,pickle,numpy as np\nids=[];texts=[]\nfor line in open('data/pool.jsonl'):\n r=json.loads(line); ids.append(r['id']); texts.append(r['text'])\nkeep=pickle.load(open('/tmp/keep_cache_v2.pkl','rb'))\nlogp=np.load('/tmp/scores_v2.npy')\nlens=np.array([len(texts[j]) for j in keep],float)\nprior=0.15*np.log(lens/2000.0)\nTC=100_000_000\ndef build(SH,out):\n buckets={n:list(np.argsort(-(logp[:,r]+prior))) for r,n in enumerate([\"wiki\",\"qa\",\"web\"])}\n quota={k:SH[k]*TC for k in SH}; got={k:0. for k in SH}; ptr={k:0 for k in SH}\n sel=[];tot=0.;claimed=set()\n while tot<TC:\n cand=[k for k in SH if ptr[k]<len(buckets[k])]\n if not cand: break\n k=min(cand,key=lambda k:got[k]/quota[k]); j=buckets[k][ptr[k]]; ptr[k]+=1\n if j in claimed: continue\n claimed.add(j); sel.append(ids[keep[j]]); got[k]+=lens[j]; tot+=lens[j]\n json.dump(sel,open(out,'w')); print(out,len(sel),{k:round(v/1e6,1) for k,v in got.items()})\nbuild({\"wiki\":0.40,\"qa\":0.10,\"web\":0.50},'/tmp/selA.json')\nbuild({\"wiki\":0.34,\"qa\":0.33,\"web\":0.33},'/tmp/selB.json')\nbuild({\"wiki\":0.15,\"qa\":0.15,\"web\":0.70},'/tmp/selC.json')\nPY"
}Bash result
/tmp/selA.json 20219 {'wiki': 40.0, 'qa': 10.0, 'web': 50.0}
/tmp/selB.json 19929 {'wiki': 34.0, 'qa': 33.0, 'web': 33.0}
/tmp/selC.json 18901 {'wiki': 15.0, 'qa': 15.0, 'web': 70.0}
[stdout]
/tmp/selA.json 20219 {'wiki': 40.0, 'qa': 10.0, 'web': 50.0}
/tmp/selB.json 19929 {'wiki': 34.0, 'qa': 33.0, 'web': 33.0}
/tmp/selC.json 18901 {'wiki': 15.0, 'qa': 15.0, 'web': 70.0}
[metadata] {"noOutputExpected": false}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "cd /workspace; export TOKENIZERS_PARALLELISM=false\nfor v in A B C; do\n ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy >/dev/null 2>&1 && \\\n python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed \"s/^/$v /\" ) &\ndone; wait",
"run_in_background": true
}Bash result
Command running in background with ID: bybew3bx6. Output is being written to: /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bybew3bx6.output. You will be notified when it completes. To check interim output, use Read on that file path.
Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands.
[metadata] {"noOutputExpected": false, "backgroundTaskId": "bybew3bx6", "backgroundCwdHint": "Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands."}Meanwhile, writing the claim document:
args
{
"file_path": "/workspace/claim.md",
"content": "# Claim: register-stratified domain matching beats undifferentiated quality ranking\n\n## Hypothesis\n\nFor a fixed, small token budget evaluated against a **multi-register** target, the\nbinding constraint is not \"how clean is each document\" but **how well the training\nmixture's register proportions match the target's**. Concretely:\n\n1. A single scalar quality/domain score, applied greedily, collapses the selection\n onto whichever register is most abundant and most confidently scored (here:\n general web prose). The under-represented registers of the target — encyclopedic\n prose and technical Q&A — are then almost absent from a 12M-token budget, and\n the model pays a large perplexity penalty on exactly those quarters of the\n evaluation.\n2. Ranking documents *separately per target register* and filling a **per-register\n quota** recovers those quarters at almost no cost to the majority register,\n because the marginal web document at the 50%-quota boundary is barely worse\n than the one at the 100%-quota boundary (the web candidate pool is ~30x larger\n than the budget), whereas the marginal wiki-like document is enormously better\n than nothing.\n\nSo: stratify, don't just rank.\n\n## Mechanism (prediction of an observable other than final perplexity)\n\nThe mechanism is **coverage of the target's register mixture**, not per-document\ncleanliness. That makes several non-perplexity predictions, checkable before any\nmodel is trained:\n\n- **M1 — Collapse is visible in the selection itself.** Under a single-score\n ranking, the register composition of the selected 12M tokens should be\n drastically skewed relative to the target's ~25/25/50 (wiki/qa/web) mixture.\n *Observed:* the un-stratified variant's candidate mass is 417M chars of `web`\n against 14M of `wiki` and 3M of `qa` — a greedy single ranking is >80% web.\n- **M2 — The gate alone is not the mechanism.** The hard quality gate keeps ~52%\n of the pool; ranking within it by a single high-quality-vs-pool classifier\n should give only a *small* gain over random. *Observed:* single-classifier\n selection 434.4 dev PPL vs random baseline 459.8 — a 5.5% gain, i.e. cleanliness\n alone explains little.\n- **M3 — Stratification is the mechanism.** Holding the gate, the features, and the\n classifier fixed and changing *only* the fill rule from \"one ranking\" to\n \"per-register quotas\" should produce a step change far larger than M2's.\n *Observed:* 434.4 → 321.4 dev PPL (−26%), from a change that touches no\n document scores at all, only how many documents each register contributes.\n- **M4 — Interior optimum in the quota vector.** If coverage is the mechanism,\n perplexity should be a *concave* function of the quota shares with a minimum\n near the target's true proportions: both starving a register and over-serving it\n (spending budget on weak proxies at the expense of the abundant, well-matched\n register) should be worse than matching. A pure quality story predicts monotone\n improvement as we concentrate on the highest-scoring register instead.\n- **M5 — Register proxies need not match surface form.** The pool contains only 96\n documents with an HTML `<p>` tag, so the `qa` quota cannot be filled with\n markup-matched text; it fills with technical/instructional prose. If the\n mechanism were surface-form mimicry, that quota would be worthless; if it is\n register coverage, it should still help.\n\n## Falsification\n\nThe claim is wrong if any of these hold:\n\n- **F1.** A single-ranking selection using the *same* gate and *same* features,\n with no stratification, matches or beats the stratified selection. Then the gain\n came from the scorer, not from mixture matching. (Run: v1 = 434.4 vs\n v2 = 321.4 — not observed.)\n- **F2.** Perplexity is monotone in the wiki (or any single) share, i.e. pushing a\n share to ~100% keeps improving. Then \"pick the best-looking register and stop\"\n is the real rule and stratification is incidental. (Tested by sweeping the share\n vector; an interior optimum falsifies this alternative, a monotone curve\n falsifies my claim.)\n- **F3.** Removing the `qa` quota entirely (share → 0) is neutral or better at\n matched budget. That would falsify M5 and show the quota is filling with noise\n rather than a usable register proxy.\n- **F4.** Randomly sub-sampling the gated pool to the same 25/25/50 *character*\n proportions, but with documents drawn at random within each register rather\n than by score, does as well. Then the per-register *ranking* contributes nothing\n and only the proportions matter — a weaker claim than the one made here.\n\n## Transfer\n\n- **Where it should transfer.** Any fixed-budget curation problem whose evaluation\n is a *known mixture* of registers, especially when budget << pool and the pool is\n dominated by one register. The recipe needs only (a) a handful of in-domain\n reference text to define registers, and (b) a cheap scorer; both scale to\n fastText/n-gram classifiers over billions of documents at negligible cost. This\n is why production pipelines interleave per-source quotas rather than globally\n ranking by a quality score.\n- **What it needs to be true.** The abundant register must be over-supplied\n relative to the budget (so quota-capping it is nearly free), and the scarce\n registers must have *some* usable proxy in the pool. Both hold here.\n- **Where it should fail.** (i) If the budget approaches the size of the gated pool,\n quotas can only reshuffle a fixed set and the gain vanishes. (ii) If the target\n is single-register, stratification degenerates to ranking and buys nothing. (iii)\n If a target register has no proxy at all in the pool, its quota actively wastes\n budget — the honest move there is to shrink that share, which is exactly what the\n share sweep tests.\n- **Scaling caveat.** The reference text used to define the registers here is the\n dev target itself. That is legitimate domain disclosure, not label leakage — the\n scored quantity is register membership, not held-out loss — but it does mean the\n method inherits any register the disclosure omits. At larger scale one would\n define registers from named sources (Wikipedia dump, a QA site dump, a news\n corpus) instead of from an eval sample.\n\n## Results (dev PPL, frozen 30M GPT, 12M-token budget, `multi_dev.npy`)\n\n| selection | dev PPL |\n|---|---|\n| random pool sample (do-nothing baseline) | 459.8 |\n| gate + single quality/domain ranking (v1) | 434.4 |\n| gate + register-stratified quotas 25/25/50 (v2) | **321.4** |\n\nShare-sweep results (F2/F3) are reported in `RESULTS.md`.\n"
}Write result
File created successfully at: /workspace/claim.md (file state is current in your context — no need to Read it back)
[metadata] {"type": "create", "filePath": "/workspace/claim.md", "content": "# Claim: register-stratified domain matching beats undifferentiated quality ranking\n\n## Hypothesis\n\nFor a fixed, small token budget evaluated against a **multi-register** target, the\nbinding constraint is not \"how clean is each document\" but **how well the training\nmixture's register proportions match the target's**. Concretely:\n\n1. A single scalar quality/domain score, applied greedily, collapses the selection\n onto whichever register is most abundant and most confidently scored (here:\n general web prose). The under-represented registers of the target — encyclopedic\n prose and technical Q&A — are then almost absent from a 12M-token budget, and\n the model pays a large perplexity penalty on exactly those quarters of the\n evaluation.\n2. Ranking documents *separately per target register* and filling a **per-register\n quota** recovers those quarters at almost no cost to the majority register,\n because the marginal web document at the 50%-quota boundary is barely worse\n than the one at the 100%-quota boundary (the web candidate pool is ~30x larger\n than the budget), whereas the marginal wiki-like document is enormously better\n than nothing.\n\nSo: stratify, don't just rank.\n\n## Mechanism (prediction of an observable other than final perplexity)\n\nThe mechanism is **coverage of the target's register mixture**, not per-document\ncleanliness. That makes several non-perplexity predictions, checkable before any\nmodel is trained:\n\n- **M1 — Collapse is visible in the selection itself.** Under a single-score\n ranking, the register composition of the selected 12M tokens should be\n drastically skewed relative to the target's ~25/25/50 (wiki/qa/web) mixture.\n *Observed:* the un-stratified variant's candidate mass is 417M chars of `web`\n against 14M of `wiki` and 3M of `qa` — a greedy single ranking is >80% web.\n- **M2 — The gate alone is not the mechanism.** The hard quality gate keeps ~52%\n of the pool; ranking within it by a single high-quality-vs-pool classifier\n should give only a *small* gain over random. *Observed:* single-classifier\n selection 434.4 dev PPL vs random baseline 459.8 — a 5.5% gain, i.e. cleanliness\n alone explains little.\n- **M3 — Stratification is the mechanism.** Holding the gate, the features, and the\n classifier fixed and changing *only* the fill rule from \"one ranking\" to\n \"per-register quotas\" should produce a step change far larger than M2's.\n *Observed:* 434.4 → 321.4 dev PPL (−26%), from a change that touches no\n document scores at all, only how many documents each register contributes.\n- **M4 — Interior optimum in the quota vector.** If coverage is the mechanism,\n perplexity should be a *concave* function of the quota shares with a minimum\n near the target's true proportions: both starving a register and over-serving it\n (spending budget on weak proxies at the expense of the abundant, well-matched\n register) should be worse than matching. A pure quality story predicts monotone\n improvement as we concentrate on the highest-scoring register instead.\n- **M5 — Register proxies need not match surface form.** The pool contains only 96\n documents with an HTML `<p>` tag, so the `qa` quota cannot be filled with\n markup-matched text; it fills with technical/instructional prose. If the\n mechanism were surface-form mimicry, that quota would be worthless; if it is\n register coverage, it should still help.\n\n## Falsification\n\nThe claim is wrong if any of these hold:\n\n- **F1.** A single-ranking selection using the *same* gate and *same* features,\n with no stratification, matches or beats the stratified selection. Then the gain\n came from the scorer, not from mixture matching. (Run: v1 = 434.4 vs\n v2 = 321.4 — not observed.)\n- **F2.** Perplexity is monotone in the wiki (or any single) share, i.e. pushing a\n share to ~100% keeps improving. Then \"pick the best-looking register and stop\"\n is the real rule and stratification is incidental. (Tested by sweeping the share\n vector; an interior optimum falsifies this alternative, a monotone curve\n falsifies my claim.)\n- **F3.** Removing the `qa` quota entirely (share → 0) is neutral or better at\n matched budget. That would falsify M5 and show the quota is filling with noise\n rather than a usable register proxy.\n- **F4.** Randomly sub-sampling the gated pool to the same 25/25/50 *character*\n proportions, but with documents drawn at random within each register rather\n than by score, does as well. Then the per-register *ranking* contributes nothing\n and only the proportions matter — a weaker claim than the one made here.\n\n## Transfer\n\n- **Where it should transfer.** Any fixed-budget curation problem whose evaluation\n is a *known mixture* of registers, especially when budget << pool and the pool is\n dominated by one register. The recipe needs only (a) a handful of in-domain\n reference text to define registers, and (b) a cheap scorer; both scale to\n fastText/n-gram classifiers over billions of documents at negligible cost. This\n is why production pipelines interleave per-source quotas rather than globally\n ranking by a quality score.\n- **What it needs to be true.** The abundant register must be over-supplied\n relative to the budget (so quota-capping it is nearly free), and the scarce\n registers must have *some* usable proxy in the pool. Both hold here.\n- **Where it should fail.** (i) If the budget approaches the size of the gated pool,\n quotas can only reshuffle a fixed set and the gain vanishes. (ii) If the target\n is single-register, stratification degenerates to ranking and buys nothing. (iii)\n If a target register has no proxy at all in the pool, its quota actively wastes\n budget — the honest move there is to shrink that share, which is exactly what the\n share sweep tests.\n- **Scaling caveat.** The reference text used to define the registers here is the\n dev target itself. That is legitimate domain disclosure, not label leakage — the\n scored quantity is register membership, not held-out loss — but it does mean the\n method inherits any register the disclosure omits. At larger scale one would\n define registers from named sources (Wikipedia dump, a QA site dump, a news\n corpus) instead of from an eval sample.\n\n## Results (dev PPL, frozen 30M GPT, 12M-token budget, `multi_dev.npy`)\n\n| selection | dev PPL |\n|---|---|\n| random pool sample (do-nothing baseline) | 459.8 |\n| gate + single quality/domain ranking (v1) | 434.4 |\n| gate + register-stratified quotas 25/25/50 (v2) | **321.4** |\n\nShare-sweep results (F2/F3) are reported in `RESULTS.md`.\n", "structuredPatch": [], "originalFile": null, "userModified": false}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 105; cat /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bybew3bx6.output; cat /workspace/.timer/remaining_secs"
}Bash result
3778
[stdout]
3778
[metadata] {"noOutputExpected": false}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 210; cat /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bybew3bx6.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "cat /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bybew3bx6.output; cat /workspace/.timer/remaining_secs"
}Bash result
C HELDOUT_PPL 332.709 loss 5.8073 train_s 174 /tmp/trC.npy
B HELDOUT_PPL 320.272 loss 5.7692 train_s 175 /tmp/trB.npy
A HELDOUT_PPL 327.122 loss 5.7903 train_s 175 /tmp/trA.npy
[1] Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[2]- Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[3]+ Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
3648
[stdout]
C HELDOUT_PPL 332.709 loss 5.8073 train_s 174 /tmp/trC.npy
B HELDOUT_PPL 320.272 loss 5.7692 train_s 175 /tmp/trB.npy
A HELDOUT_PPL 327.122 loss 5.7903 train_s 175 /tmp/trA.npy
[1] Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[2]- Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[3]+ Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
3648
[metadata] {"noOutputExpected": false}Interior optimum confirmed (falsifies F2). Now testing near-duplicate removal and the length prior:
args
{
"command": "python3 - <<'PY'\nimport json,pickle,zlib,re,numpy as np,os\nids=[];texts=[]\nfor line in open('data/pool.jsonl'):\n r=json.loads(line); ids.append(r['id']); texts.append(r['text'])\nkeep=pickle.load(open('/tmp/keep_cache_v2.pkl','rb'))\nlogp=np.load('/tmp/scores_v2.npy'); lens=np.array([len(texts[j]) for j in keep],float)\nW=re.compile(r\"[a-z0-9']+\")\n# MinHash-16 over word 5-grams -> drop docs sharing a 4-hash band (near-dup)\nsig=np.empty((len(keep),16),np.uint32)\nfor n,j in enumerate(keep):\n w=W.findall(texts[j].lower())\n g=[zlib.crc32(' '.join(w[k:k+5]).encode()) for k in range(0,max(1,len(w)-4))]\n a=np.array(g,np.uint64) if g else np.zeros(1,np.uint64)\n for p in range(16):\n sig[n,p]=((a*(2*p+1)+p*7919)%4294967291).min()\nseen=set(); dup=np.zeros(len(keep),bool)\norder=np.argsort(-lens) # keep the longest representative of each cluster\nfor n in order:\n bands=[(p,)+tuple(sig[n,4*p:4*p+4]) for p in range(4)]\n if any(b in seen for b in bands): dup[n]=True\n else: seen.update(bands)\nprint(\"near-dups flagged:\",dup.sum(),\"of\",len(keep))\nnp.save('/tmp/dup.npy',dup)\nTC=100_000_000\ndef build(SH,out,pw=0.15,nodup=True):\n prior=pw*np.log(lens/2000.0)\n pen=np.where(dup,-1e9,0.0) if nodup else 0.0\n buckets={n:list(np.argsort(-(logp[:,r]+prior+pen))) for r,n in enumerate([\"wiki\",\"qa\",\"web\"])}\n quota={k:SH[k]*TC for k in SH}; got={k:0. for k in SH}; ptr={k:0 for k in SH}\n sel=[];tot=0.;claimed=set()\n while tot<TC:\n cand=[k for k in SH if ptr[k]<len(buckets[k])]\n if not cand: break\n k=min(cand,key=lambda k:got[k]/quota[k]); j=buckets[k][ptr[k]]; ptr[k]+=1\n if j in claimed or (nodup and dup[j]): continue\n claimed.add(j); sel.append(ids[keep[j]]); got[k]+=lens[j]; tot+=lens[j]\n json.dump(sel,open(out,'w')); print(out,len(sel),round(tot/1e6,1))\nB={\"wiki\":0.34,\"qa\":0.33,\"web\":0.33}\nbuild(B,'/tmp/selD.json') # dedup\nbuild(B,'/tmp/selE.json',pw=0.45) # stronger length prior, dedup\nbuild(B,'/tmp/selF.json',pw=0.0) # no length prior, dedup\nPY\ncat /workspace/.timer/remaining_secs"
}Bash result
near-dups flagged: 6984 of 93891
/tmp/selD.json 20691 100.0
/tmp/selE.json 16098 100.0
/tmp/selF.json 23074 100.0
3578
[stdout]
near-dups flagged: 6984 of 93891
/tmp/selD.json 20691 100.0
/tmp/selE.json 16098 100.0
/tmp/selF.json 23074 100.0
3578
[metadata] {"noOutputExpected": false}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "cd /workspace; export TOKENIZERS_PARALLELISM=false\nfor v in D E F; do\n ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy >/dev/null 2>&1 && \\\n python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed \"s/^/$v /\" ) &\ndone; wait",
"run_in_background": true
}Bash result
Command running in background with ID: bijuh3qi0. Output is being written to: /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bijuh3qi0.output. You will be notified when it completes. To check interim output, use Read on that file path.
Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands.
[metadata] {"noOutputExpected": false, "backgroundTaskId": "bijuh3qi0", "backgroundCwdHint": "Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands."}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 235; grep HELD /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bijuh3qi0.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 170; grep HELD /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bijuh3qi0.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "grep HELD /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bijuh3qi0.output; cat /workspace/.timer/remaining_secs"
}Bash result
F HELDOUT_PPL 318.847 loss 5.7647 train_s 170 /tmp/trF.npy
E HELDOUT_PPL 325.206 loss 5.7845 train_s 174 /tmp/trE.npy
D HELDOUT_PPL 324.081 loss 5.7810 train_s 174 /tmp/trD.npy
[1] Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[2]- Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[3]+ Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
3318
[stdout]
F HELDOUT_PPL 318.847 loss 5.7647 train_s 170 /tmp/trF.npy
E HELDOUT_PPL 325.206 loss 5.7845 train_s 174 /tmp/trE.npy
D HELDOUT_PPL 324.081 loss 5.7810 train_s 174 /tmp/trD.npy
[1] Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[2]- Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[3]+ Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
3318
[metadata] {"noOutputExpected": false}F (dedup + no length prior) = 318.8. Final round: probing the qa-quota falsification (F3), a further wiki push, and diversity dilution:
args
{
"command": "python3 - <<'PY'\nimport json,pickle,random,numpy as np\nids=[];texts=[]\nfor line in open('data/pool.jsonl'):\n r=json.loads(line); ids.append(r['id']); texts.append(r['text'])\nkeep=pickle.load(open('/tmp/keep_cache_v2.pkl','rb'))\nlogp=np.load('/tmp/scores_v2.npy'); dup=np.load('/tmp/dup.npy')\nlens=np.array([len(texts[j]) for j in keep],float)\nTC=100_000_000\ndef build(SH,out,pw=0.0,dilute=0.0):\n prior=pw*np.log(lens/2000.0); pen=np.where(dup,-1e9,0.0)\n buckets={n:list(np.argsort(-(logp[:,r]+prior+pen))) for r,n in enumerate([\"wiki\",\"qa\",\"web\"]) if SH.get(n,0)>0}\n SH={k:v for k,v in SH.items() if v>0}\n quota={k:SH[k]*TC for k in SH}; got={k:0. for k in SH}; ptr={k:0 for k in SH}\n sel=[];tot=0.;claimed=set()\n while tot<TC:\n cand=[k for k in SH if ptr[k]<len(buckets[k])]\n if not cand: break\n k=min(cand,key=lambda k:got[k]/quota[k]); j=buckets[k][ptr[k]]; ptr[k]+=1\n if j in claimed or dup[j]: continue\n claimed.add(j); sel.append(ids[keep[j]]); got[k]+=lens[j]; tot+=lens[j]\n if dilute>0: # interleave random gated docs to add register diversity\n rng=random.Random(0); pool=[n for n in range(len(keep)) if n not in claimed and not dup[n]]\n rng.shuffle(pool); step=int(1/dilute)\n extra=[ids[keep[n]] for n in pool[:len(sel)//step]]\n merged=[]\n for i,x in enumerate(sel):\n merged.append(x)\n if i%step==step-1 and extra: merged.append(extra.pop())\n sel=merged\n json.dump(sel,open(out,'w')); print(out,len(sel))\nbuild({\"wiki\":0.34,\"qa\":0.33,\"web\":0.33},'/tmp/selG.json',dilute=0.15)\nbuild({\"wiki\":0.45,\"qa\":0.30,\"web\":0.25},'/tmp/selH.json')\nbuild({\"wiki\":0.50,\"qa\":0.0,\"web\":0.50},'/tmp/selI.json')\nPY\ncd /workspace; export TOKENIZERS_PARALLELISM=false\nfor v in G H I; do\n ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy >/dev/null 2>&1 && \\\n python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed \"s/^/$v /\" ) &\ndone; wait",
"run_in_background": true
}Bash result
Command running in background with ID: b0efm8kwh. Output is being written to: /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/b0efm8kwh.output. You will be notified when it completes. To check interim output, use Read on that file path.
Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands.
[metadata] {"noOutputExpected": false, "backgroundTaskId": "b0efm8kwh", "backgroundCwdHint": "Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands."}Meanwhile, updating curate.py to the current best configuration (F: dedup, no length prior, 34/33/33):
args
{
"command": "python3 - <<'PY'\np='/workspace/submission/curate.py'; s=open(p).read()\ns=s.replace('SHARES = {\"wiki\": 0.25, \"qa\": 0.25, \"web\": 0.50}',\n 'SHARES = {\"wiki\": 0.34, \"qa\": 0.33, \"web\": 0.33} # tuned by dev sweep')\n# insert near-dup removal after lens/prior block\nold = '''lens = np.array([len(texts[j]) for j in keep], np.float64)\n# Mild length prior: among equally in-register documents prefer longer ones --\n# fewer document boundaries per training token means more usable context.\nprior = 0.15 * np.log(lens / 2000.0)\n'''\nnew = '''lens = np.array([len(texts[j]) for j in keep], np.float64)\n\n# Near-duplicate removal (MinHash-16 over word 5-grams, 4 bands of 4).\n# Duplicated text wastes budget: at 12M tokens the model sees the selection\n# ~2x already, so a near-dup pair is effectively 4 passes over that text.\n# The longest member of each cluster is kept as the representative.\nWORDL = re.compile(r\"[a-z0-9']+\")\nsig = np.empty((len(keep), 16), np.uint32)\nfor n, j in enumerate(keep):\n w = WORDL.findall(texts[j].lower())\n grams = [zlib.crc32(\" \".join(w[k:k + 5]).encode()) for k in range(max(1, len(w) - 4))]\n a = np.array(grams or [0], np.uint64)\n for pp in range(16):\n sig[n, pp] = ((a * (2 * pp + 1) + pp * 7919) % 4294967291).min()\n if n % 20000 == 0:\n print(f\"minhash {n}/{len(keep)}\", flush=True)\nseen, dup = set(), np.zeros(len(keep), bool)\nfor n in np.argsort(-lens):\n bands = [(pp,) + tuple(sig[n, 4 * pp:4 * pp + 4]) for pp in range(4)]\n if any(bd in seen for bd in bands):\n dup[n] = True\n else:\n seen.update(bands)\nprint(f\"near-duplicates dropped: {int(dup.sum())} of {len(keep)}\", flush=True)\n\n# No length prior: a dev sweep showed ranking purely by register posterior beats\n# any length tilt (prior weight 0.0: 318.8 dev PPL; 0.15: 324.1; 0.45: 325.2).\nprior = np.where(dup, -1e9, 0.0)\n'''\nassert old in s\ns=s.replace(old,new)\ns=s.replace(''' if j in claimed: # already taken by another register\n continue''',''' if j in claimed or dup[j]: # already taken, or a near-dup\n continue''')\ns=s.replace(''' register ranks every gated document by its own posterior and the final list''',\n ''' register ranks every gated document by its own posterior (near-duplicates,\n found by MinHash over word 5-grams, are excluded) and the final list''')\nopen(p,'w').write(s)\nprint(\"patched\")\nPY"
}Bash result
patched
[stdout]
patched
[metadata] {"noOutputExpected": false}encrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 230; grep HELD /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/b0efm8kwh.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "sleep 175; grep HELD /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/b0efm8kwh.output; cat /workspace/.timer/remaining_secs"
}Bash result · error
Exit code 143
Command timed out after 2m 0s
[error] tool reported failureencrypted chain-of-thought — recorded, not exposed
args
{
"command": "grep HELD /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/b0efm8kwh.output; cat /workspace/.timer/remaining_secs"
}Bash result
G HELDOUT_PPL 315.256 loss 5.7534 train_s 174 /tmp/trG.npy
[1] Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
I HELDOUT_PPL 443.444 loss 6.0946 train_s 175 /tmp/trI.npy
H HELDOUT_PPL 315.817 loss 5.7552 train_s 175 /tmp/trH.npy
[2]- Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[3]+ Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
3007
[stdout]
G HELDOUT_PPL 315.256 loss 5.7534 train_s 174 /tmp/trG.npy
[1] Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
I HELDOUT_PPL 443.444 loss 6.0946 train_s 175 /tmp/trI.npy
H HELDOUT_PPL 315.817 loss 5.7552 train_s 175 /tmp/trH.npy
[2]- Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
[3]+ Done ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy > /dev/null 2>&1 && python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed "s/^/$v /" )
3007
[metadata] {"noOutputExpected": false}Removing the qa quota is catastrophic (443.4) — that strongly confirms the register-coverage mechanism. Pushing the qa share higher:
args
{
"command": "cat > /tmp/build.py <<'PY'\nimport json,pickle,random,sys,numpy as np\nids=[];texts=[]\nfor line in open('/workspace/data/pool.jsonl'):\n r=json.loads(line); ids.append(r['id']); texts.append(r['text'])\nkeep=pickle.load(open('/tmp/keep_cache_v2.pkl','rb'))\nlogp=np.load('/tmp/scores_v2.npy'); dup=np.load('/tmp/dup.npy')\nlens=np.array([len(texts[j]) for j in keep],float)\nTC=100_000_000\ndef build(SH,out,dilute=0.0):\n pen=np.where(dup,-1e9,0.0)\n SH={k:v for k,v in SH.items() if v>0}\n buckets={n:list(np.argsort(-(logp[:,r]+pen))) for r,n in enumerate([\"wiki\",\"qa\",\"web\"]) if n in SH}\n quota={k:SH[k]*TC for k in SH}; got={k:0. for k in SH}; ptr={k:0 for k in SH}\n sel=[];tot=0.;claimed=set()\n while tot<TC:\n cand=[k for k in SH if ptr[k]<len(buckets[k])]\n if not cand: break\n k=min(cand,key=lambda k:got[k]/quota[k]); j=buckets[k][ptr[k]]; ptr[k]+=1\n if j in claimed or dup[j]: continue\n claimed.add(j); sel.append(ids[keep[j]]); got[k]+=lens[j]; tot+=lens[j]\n if dilute>0:\n rng=random.Random(0); pool=[n for n in range(len(keep)) if n not in claimed and not dup[n]]\n rng.shuffle(pool); step=int(1/dilute); extra=[ids[keep[n]] for n in pool[:len(sel)//step]]\n m=[]\n for i,x in enumerate(sel):\n m.append(x)\n if i%step==step-1 and extra: m.append(extra.pop())\n sel=m\n json.dump(sel,open(out,'w')); print(out,len(sel),flush=True)\nfor spec in json.loads(sys.argv[1]):\n build(spec['sh'],spec['out'],spec.get('dilute',0.0))\nPY\npython3 /tmp/build.py '[{\"sh\":{\"wiki\":0.30,\"qa\":0.45,\"web\":0.25},\"out\":\"/tmp/selJ.json\"},\n {\"sh\":{\"wiki\":0.45,\"qa\":0.30,\"web\":0.25},\"out\":\"/tmp/selK.json\",\"dilute\":0.15},\n {\"sh\":{\"wiki\":0.20,\"qa\":0.60,\"web\":0.20},\"out\":\"/tmp/selL.json\"}]'\ncd /workspace; export TOKENIZERS_PARALLELISM=false\nfor v in J K L; do\n ( python3 pack_selection.py /tmp/sel$v.json /tmp/tr$v.npy >/dev/null 2>&1 && \\\n python3 train_nano.py --train_npy /tmp/tr$v.npy --heldout_npy data/multi_dev.npy --out_json /tmp/$v.json 2>&1 | grep HELDOUT | sed \"s/^/$v /\" ) &\ndone; wait",
"run_in_background": true
}Bash result
Command running in background with ID: bsuxwsrce. Output is being written to: /tmp/claude-0/-workspace/9df847d0-e162-4016-8bd5-af03c1e3e23f/tasks/bsuxwsrce.output. You will be notified when it completes. To check interim output, use Read on that file path.
Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands.
[metadata] {"noOutputExpected": false, "backgroundTaskId": "bsuxwsrce", "backgroundCwdHint": "Session cwd remains /workspace; directory changes made by the backgrounded command do not apply to subsequent commands."}