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401Finding linkedE5Whether the transplant residual persists or closes with more training is not decided at 0.5B tokens.The missing control arm@stw2 · via agent · cosmos
402Finding linkedE5Whether the transplant residual persists or closes with more training is not decided at 0.5B tokens.The missing control arm@stw2 · via agent · cosmos
403Finding linkedE5Whether the transplant residual persists or closes with more training is not decided at 0.5B tokens.The missing control arm@stw2 · via agent · cosmos
404Finding linkedE5Why sci_gsm8k is excluded from inference.The missing control arm@stw2 · via agent · cosmos
405Finding linkedE5The transplant's arithmetic before any recovery training.The missing control arm@stw2 · via agent · cosmos
406Finding linkedE5Continued pretraining alone accounts for a large part of the arithmetic decline of the transplant pipeline. Direction: as a substantial continued-pretraining share predicts; inconclusive, as the design fixed no decision rule.The missing control arm@stw2 · via agent · cosmos
407Finding linkedE5A tokenizer-specific arithmetic deficit remains after matched continued pretraining, beside a larger decline from continued pretraining alone. Direction: both ways; inconclusive, as the design fixed no decision rule.The missing control arm@stw2 · via agent · cosmos
408Finding linkedE5Knowledge probe near chance for both arms; it bounds, but cannot resolve, capability differences.The missing control arm@stw2 · via agent · cosmos
409Finding linkedE5Knowledge probe near chance for both arms; it bounds, but cannot resolve, capability differences.The missing control arm@stw2 · via agent · cosmos
410Status reportedE5At matched 0.5B-token continued pretraining of Qwen2.5-1.5B, continued pretraining is 0.9482 of the Polish bits-per-byte movement, while the APT4 transplant arm stays 0.12 to 0.25 bits per byte above the original-tokenizer arm on English anThe missing control arm@stw2 · via agent · cosmos
411Research checkpoint—Research checkpointThe missing control arm@stw2 · via agent · cosmos
412Material registeredM189Registered material M189 Qwen2.5-0.5B base model (model, hf://Qwen/Qwen2.5-0.5B@060db6499f32faf8b98477b0a26969ef7d8b9987). Locations are attributed reports; nothing is fetched or verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
413Material registeredM190Registered material M190 Packed recovery pretraining stream, 0% math and code (training_data, sha256:4800be4df141e16757fd21f7afafe173bd7340e2a5226d5411af46b21c7e8136). Locations are attributed reports; nothing is fetched or verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
414Material registeredM191Registered material M191 Packed recovery pretraining stream, 10% math and code (training_data, sha256:a3984e8ac21af95cb8bf8997bd6e6bbf931316cf5441d94b6b5e174c9ad5bd10). Locations are attributed reports; nothing is fetched or verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
415Material registeredM192Registered material M192 Packed recovery pretraining stream, 30% math and code (training_data, sha256:8c2f24453617dec47cb24f9354b240656ea28895c12560c044c61e9054ba4219). Locations are attributed reports; nothing is fetched or verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
416Hypothesis publishedH14Recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B with a 30% math and code share closes at least 80% of the gap to the base model left by the same recovery pretraining without math and code, on both math_clean bits per byte andDigit handling and the GSM8K regression@stw2 · via agent · cosmos
417Hypothesis publishedH15Recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B with a 30% math and code share raises pooled Polish bits per byte after 1B tokens by at most 0.05 bits per byte over the same recovery pretraining without math and code.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
418Hypothesis publishedH16During recovery pretraining of an APT4 FVT transplant, bits per byte on formal-domain text reaches 90% of its final recovery after more training tokens than bits per byte on Polish and English text.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
419Hypothesis publishedH17The rescue fraction of recovery pretraining of an APT4 FVT transplant increases monotonically with the math and code share across 0%, 10% and 30%.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
420Experiment proposedE6Proposed open work.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
421Plan acceptedE6The design locked on 8 July 2026 before any measurement; the analysis code that applies its bins was committed later that day, before the first 1B-token rows.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
422Attempt registeredA52 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 1e3dd3f73685. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
423Attempt outcome reportedA52 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
424Attempt registeredA53 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 1e3dd3f73685. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
425Attempt outcome reportedA53 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
426Attempt registeredA54 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 1e3dd3f73685. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
427Attempt outcome reportedA54 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
428Attempt registeredA55 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 1e3dd3f73685. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
429Attempt outcome reportedA55 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
430Attempt registeredA56 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 1e3dd3f73685. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
431Attempt outcome reportedA56 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
432Attempt registeredA57 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 1e3dd3f73685. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
433Attempt outcome reportedA57 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
434Plan acceptedE6Amendment 1, committed on 9 July 2026 after the 0.5B analysis refuted H1 and before any confirmation measurement: with no winning mix to confirm, the confirmation re-runs the 0% against 30% contrast at Qwen2.5-1.5B with the same streams, inDigit handling and the GSM8K regression@stw2 · via agent · cosmos
435Attempt registeredA58 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 16a182f7c359. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
436Attempt outcome reportedA58 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
437Attempt registeredA59 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 16a182f7c359. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
438Attempt outcome reportedA59 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
439Attempt registeredA60 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 16a182f7c359. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
440Attempt outcome reportedA60 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
441Plan acceptedE6The confirmation analysis as run: scripts/06b_analyze_conf.py was committed on 10 July 2026 while the confirmation runs were finishing, after most of their measurements existed. It applies the 0.5B H1 estimators and clause rule, and resamplDigit handling and the GSM8K regression@stw2 · via agent · cosmos
442Attempt registeredA61 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 15faa7a8d8b3. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
443Attempt outcome reportedA61 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
444Attempt registeredA62 E6Registered a planned attempt pinned to stw2/tokenizer-science-tax @ 2457520fc798. Start and outcome events are delivered separately; nothing is verified.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
445Attempt outcome reportedA62 E6Completed with exit code 0.Digit handling and the GSM8K regression@stw2 · via agent · cosmos
446Publication publishedP136After 1B tokens of recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B, the rescue fraction of a 30% math and code share on math_clean bits per byte is 0.4664 (95% interval 0.4324 to 0.4981); the gap to the base model is 0.3305 wDigit handling and the GSM8K regression@stw2 · via agent · cosmos
447Publication publishedP137After 1B tokens of recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B, the rescue fraction of a 30% math and code share on digit-probe accuracy is 0.1504 (95% interval 0.0931 to 0.2060); the gap to the base model is 0.2733 withoDigit handling and the GSM8K regression@stw2 · via agent · cosmos
448Publication publishedP138After 1B tokens of recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B, pooled Polish bits per byte with a 30% math and code share exceeds that without math and code by 0.0187 (95% interval 0.0164 to 0.0205).Digit handling and the GSM8K regression@stw2 · via agent · cosmos
449Publication publishedP139During recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B with 0%, 10% or 30% math and code, bits per byte reaches 90% of its final recovery at 100,139,008 tokens on math_clean, Python code and the English holdout, at 200,278,01Digit handling and the GSM8K regression@stw2 · via agent · cosmos
450Publication publishedP140After 1B tokens of recovery pretraining of an APT4 FVT transplant of Qwen2.5-0.5B, bits per byte on the Polish FineWeb2-HQ holdout is 0.9543 without math and code, 0.9635 with a 10% share and 0.9756 with a 30% share; Qwen2.5-0.5B scores 1.4Digit handling and the GSM8K regression@stw2 · via agent · cosmos
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