Run 2 is finished, gated FAIL, and serving on the gateway at operator request. Run 3's corpus was built to brokkr's first recipe and held before any GPU spend: creative-writing-multiturn is a DECLARED MEGAMIX containing bluemoon, PIPPA, LimaRP and stheno, and the remix promoted creative-writing AND bluemoon -- the two roots that overlap, at median jaccard 0.873. Containment, not overlap. Dedup direction reversed so the primary source survives rather than the copy inside the bag: bluemoon 67 -> 126 conversations and 38.6% of loss signal, the largest contributor. Wholly-human share up, megamix share down, total context unchanged at 12.49M so the operator's settled mix arithmetic survived. Two structural findings recorded because they outlive this recipe: F1 'excise PIPPA' removes the ROOT and not the MATERIAL (F2's 250-word floor does that work, since PIPPA turns cannot exceed 123 words wherever they live), and LimaRP and stheno remain unchecked against any other root. Also records the correction I published wrong twice: run 2 was never unstable. All 46 flags were too_short, the collapse guards fired zero times, and it is the left tail of a length distribution -- not new to run 2 either, so it is a property of the recipe and a further base swap will not fix it.
117 lines
6.2 KiB
Markdown
117 lines
6.2 KiB
Markdown
# `[2026-08-26]` Run 3 corpus built, then held — and the megamix containment defect it exposed
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Run 3's corpus was built to brokkr's `SFT-RECIPE-run3.md` (`f6c0589`), a blocker
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was found before any GPU spend, and **brokkr is now redoing the recipe**. Nothing
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launched. The build artifacts survive and are re-parameterisable.
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## ⚠ THE FINDING: `creative-writing-multiturn` is a MEGAMIX containing our other roots
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Its own Hoard card says so — `hoard/datasets/creative-writing-multiturn/dataset.yaml`,
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`archive_provenance_note`:
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> *"Dampfinchen/Creative_Writing_Multiturn — 2026 curated ~4.6k high-turn
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> creative-writing/RP **megamix (bluemoon, LimaRP/PIPPA, stheno, gutenberg-dpo
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> chosen, VellumK2 subset)**"*
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**It is not a sibling root. It is a bag holding several of our other roots.**
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Found because my corpus build would not reproduce brokkr's numbers: he computed
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on the raw roots, I computed on run 1's deduped survivor list. bluemoon came out
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67 against his 126. Run 1's dedup record explains it:
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DROPPED -> KEPT n median jaccard
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bluemoon -> creative-writing-multiturn 59 1.000
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creative-writing-multiturn -> pippa 30 1.000
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c2-logs-32k-llama3 -> creative-writing-multiturn 23 0.945
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brokkr then measured it directly against the raw corpora, and it is worse than
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the dedup threshold showed — **the MEDIAN bluemoon conversation is 87% similar to
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something in creative-writing** (≥0.99: 28.3%, ≥0.90: 49.6%, max 0.999). That is
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containment, not overlap.
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**Why it mattered here specifically:** the remix elevates creative-writing to
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43.2% and bluemoon to 31.4% of loss signal — *the two roots that overlap*.
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Building on raw roots would have double-counted bluemoon inside creative-writing's
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share, in a run whose entire justification is the composition change.
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## Three consequences, two of them structural
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**1. "bluemoon is the only human-authored root" was overstated.** It is the only
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*wholly* human-authored root; creative-writing is *partly bluemoon*. brokkr
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restated rather than withdrew.
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**2. ⚠ F1 does not do what the recipe says.** "Excise PIPPA" removes the ROOT, not
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the MATERIAL — PIPPA persists inside the megamix, which the remix promotes to
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largest contributor. **F2's 250-word floor is what actually removes PIPPA
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material**, because PIPPA turns cannot exceed 123 words wherever they live. The
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outcome was right; the stated mechanism was wrong. **Had the operator chosen a
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floor below 123, F1 would have been nearly cosmetic.**
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**3. ⚠ The dedup kept the wrong side of the pair, 59 times.** When a primary
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source and a megamix containing it collide, the survivor should be the primary
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source, not the copy inside the bag — the megamix version may have been
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reprocessed by its curator. We kept the derivative and discarded the origin.
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**Reversed for run 3** (brokkr's call, ~3 minutes): keep bluemoon, drop the
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megamix copy. Result is better than either prior version —
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root run 2 recipe DEDUPED+REVERSED
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bluemoon 6.9% 31.4% 38.6%
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creative-writing 18.0% 43.2% 30.4%
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c2-logs 40.2% 25.4% 31.0%
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pippa 34.9% 0% 0%
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**The wholly-human share went UP and the megamix share went DOWN** — strictly the
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composition the recipe argued for, now honestly counted. Total context unchanged
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at 12.49M, so the operator's settled mix arithmetic survived untouched.
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## ⚠ The catalog-level problem, unsolved
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**A megamix root silently contains other catalog roots and nothing in the mix
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arithmetic knows.** Any share computed over roots including creative-writing
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double-counts bluemoon, PIPPA, LimaRP and stheno by an unknown amount. Run 2's
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mix had this defect and nobody noticed, because run 2 did not promote the
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overlapping roots.
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LimaRP and stheno are **still unchecked against anything.** Wants a
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`contains_datasets:` field on the Hoard card plus a preflight assertion that no
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recipe includes both a megamix and a root it contains. brokkr is raising it as
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its own item; not a run-3 blocker.
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## What is staged on ana-ml2
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/tank/erp-tune/recipe-r3/recipe-erp-seat-sft-r3.json
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/tank/erp-tune/recipe-r3/dialogue-survivors.jsonl 610 conversations
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/tank/erp-tune/recipe-r3/lowquality-mask-v1.jsonl 5,867 mask rows
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/tank/erp-tune/build_r3.py the filter build; floors are constants at the top
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/tank/erp-tune/pippa_clip.py length-distribution measurement
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/tank/erp-tune/clip_share.py turn-share vs word-share
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⚠ **`/mnt/smithy` is READ-ONLY from ana-ml2**, so recipe artifacts live under
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`/tank/erp-tune/recipe-r3/` rather than beside the r1 recipe. The harness takes
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absolute paths, so this is fine — but do not expect to write to the r1 recipe dir.
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**F2/F3/F4 are implemented as a LOSS MASK reusing the impersonation-mask format**,
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so `load_impersonation_mask` reads it and `_impersonation_flags` sha-asserts every
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masked turn with no new harness code. F4 is masked rather than stripped:
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stripping mutates content, which invalidates the shas, and the read-only mount
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forecloses a mutated derived root anyway. 28 turns of 6,209 (0.45%).
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Re-parameterising for a new recipe is one command and ~90 seconds; the dedup
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reversal and F4-as-mask handling are baked in and survive it.
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## Decisions I took
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**No conversation admission threshold** (brokkr delegated it, then endorsed).
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81% of surviving bot turns are context-only, but masked context costs the
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transformer body and **not** the LM head — the harness drops `IGNORE_INDEX`
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before the 262k-vocab head, so the waste is bounded well below what the 81%
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suggests. A 20% context trim buys ~35 minutes against a 3-hour run, and it would
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be a fifth filter moving composition inside a run whose purpose is testing the
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filters alone. **Buying 35 minutes by confounding a 3-hour experiment is a bad
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trade.** brokkr: "your reason 1 is decisive."
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**Left `erp-tune-v2` UP** on the operator's discretion grant. The card is not
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needed until a recipe is settled, and it is his evaluation surface plus a live
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gateway route. Take it down when run 3 is actually ready, not before.
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