plan(weather): substrate weather POC v1 — encoder bake-off first - #914
Conversation
Doc-only. Operator ask: a weather POC over official data combining helix, "stockfish acceleration", and "deepseek", with the POC choice left to me. Grounded on a 5-agent parallel recon of f675a0f (file:line throughout). The recon's headline: the POC is composition + measurement, not construction — helix::Signed360 (48-bit, signed polar partition) already ships, bgz17 ships BOTH flat and hierarchical 256-palettes with measured rho anchors, facet.rs already sanctions the G2x48bit helix lane verbatim, dev_s3_env already reads the operator's exact S3 var set, and NNUE is already a graded knowledge doc. THE POC: a Stage-0 encoder bake-off — 7 arms + a deliberately-broken control over 1 yr Z500 at 0.25deg (1,038,240 pts), scored Spearman/ICC against physical RMSE under Jirak bounds, gate rho >= 0.98. Chosen because it is the only stage whose failure kills everything downstream, the cheapest decisive one, and it discharges F-1 and helix's own unrun >=0.9980 gate in one run. No new repo: a workspace-EXCLUDED crates/weather-poc on the perturbation-sim template. GRIB2 never enters Rust (Python-side slab conversion in the ecmwf-opendata fork). No classid mint needed for Stage 0. Carries six corrections in §0 (the ~1.7deg helix figure is not in-tree; the 125/233ms + 3DGS numbers are operator-reported out-of-tree; kanban_actor's actor surface was deleted 2026-08-05; soa_to_lance is an example not a lib fn; NNUE is existing graded prior art; 0x0F is Geo, not free). Board hygiene same commit: INTEGRATION_PLANS prepend + EPIPHANIES E-THREE-NAMED-PROBES-ARE-ONE-MEASUREMENT. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01CcpLeEC3XK8Eye53GKBVvi
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📝 WalkthroughWalkthroughThe PR adds documentation for a weather-substrate proof of concept. It defines a seven-arm encoder bake-off with a broken control, physical Z500 validation, staged implementation boundaries, storage rules, deliverables, and kill criteria. ChangesWeather Substrate POC
Estimated code review effort: 1 (Trivial) | ~5 minutes Possibly related PRs
Suggested reviewers: Poem
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Actionable comments posted: 7
🧹 Nitpick comments (1)
.claude/plans/weather-substrate-poc-v1.md (1)
181-188: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick winAdd a language tag to the stage-ladder code fence.
Use
textfor this plain-text diagram so markdownlint MD040 passes.🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In @.claude/plans/weather-substrate-poc-v1.md around lines 181 - 188, Add the text language tag to the stage-ladder fenced code block containing the Stage 0–4 diagram, using the existing fence without changing its contents.Source: Linters/SAST tools
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In @.claude/board/EPIPHANIES.md:
- Around line 1-16: Move the complete 2026-08-08 entry in EPIPHANIES.md below
the existing 2026-08-09 entry, preserving all entry content and maintaining
append-only history with newest-first ordering.
In @.claude/plans/weather-substrate-poc-v1.md:
- Around line 201-203: Update the physical RMSE specification in the plan,
including the corresponding coarsened-resolution section, to explicitly define
cosine-latitude weighting or an equal-area remap, the missing-value mask, and
the requirement that the same convention applies at 0.25°, 1°, and 2.5°
resolutions.
- Around line 224-232: Update the Z500 experiment plan to remove wind-specific
Arm G assumptions, including Weibull/Rayleigh statistics, velocity-disc/Vogel
quantisation claims, wind-direction reporting, and forecast-error thresholds.
Either define a frozen climatological scalar Z500 PIT with an appropriate Z500
sanity threshold and use those consistently in Arm G and the resolution check,
or remove Arm G and the related claims entirely.
- Around line 194-203: Update the Stage-0 dataset definition in section 5.1 to
freeze one exact source, date range, analysis-time schedule, grid, regridding
procedure, missing-value policy, and input checksum; remove the “ERA5
acceptable” alternative. Correct the stated state count to match the selected
non-leap-year 6-hour schedule, and ensure D-WX-5 references these fixed values.
- Around line 208-219: Define a single field-to-code evaluation contract
covering every arm in the comparison: specify whether each encoder operates per
cell, tile, or whole field, how outputs are aggregated into one field
representation, and which distance is ranked against physical distance.
Explicitly define arm F’s raw/PCA representation, including a fixed PCA k and
fitting scope, so all arms produce comparable field-level distances before
computing Spearman correlation.
- Around line 391-399: Update D-WX-5 so its gate requires at least one 48-bit
target arm, such as A, E, or G, to achieve ρ ≥ 0.98; do not allow control or
non-48-bit arms F, C, or D to satisfy C2. State explicitly whether B is reported
separately, require the broken encoder control to fail, and apply the same
target-arm versus control distinction to the kill rule.
- Around line 243-246: Update the anti-vacuity section and the A-G arm matrix to
assign the deliberately broken shuffled-codebook encoder an explicit arm ID,
freeze its shuffle seed, and specify the deterministic failure rule requiring
that arm to fail the gate.
---
Nitpick comments:
In @.claude/plans/weather-substrate-poc-v1.md:
- Around line 181-188: Add the text language tag to the stage-ladder fenced code
block containing the Stage 0–4 diagram, using the existing fence without
changing its contents.
🪄 Autofix
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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.claude/board/EPIPHANIES.md.claude/board/INTEGRATION_PLANS.md.claude/plans/weather-substrate-poc-v1.md
| ## 2026-08-08 — E-THREE-NAMED-PROBES-ARE-ONE-MEASUREMENT — F-1, helix's unrun fidelity gate, and the weather-encoder question are the SAME probe | ||
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| **Status:** FINDING `[G]` on the identity (three docs, one measurement shape), `[H]` on the outcome (unrun). Surfaced by the 5-agent recon behind `.claude/plans/weather-substrate-poc-v1.md`. | ||
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| Three probes have been carried independently, in three places, each named as blocking: | ||
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| 1. **F-1 (codebook fidelity)** — `substrate-unification-thesis.md` §4.1: does hierarchical-4⁴ (a byte's nibbles = its centroid's ancestry) preserve rank-distance vs flat k-means-256? Named in the OGAR canon, **un-run**. Its KILL: if it fails, "prefix-is-ancestry" degrades from *code* to *router* and a large fraction of the `[H]`/`[S]` map collapses at once. | ||
| 2. **helix's own gate** — `crates/helix/KNOWLEDGE.md:338-343`: fidelity vs certified `Base17Fz` is **CONJECTURE, probe NOT RUN**, gate ≥0.9980 Pearson. | ||
| 3. **The weather-encoder question** — does a 48-bit `Signed360` preserve *synoptic* distance? (the gate the whole retrieval/analogue lane stands on). | ||
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| **They are one measurement:** *does a quantized hierarchical code rank like the continuous quantity it encodes?* Only the dataset differs. And `bgz17` already ships **both arms** — `Palette` (flat k-means 256, `palette.rs:112`) and `HierarchicalPalette` (16 coarse × 16 leaves with `coarse_is_ancestor_of`, `palette.rs:214,451-493`) — plus measured anchors on other data (`PaletteResolution`: Full256 ρ=0.992 / Half128 ρ=0.965 / Quarter64 ρ=0.738, `palette.rs:543-582`). So the *instrument* has been sitting in-tree, built, the entire time; what was missing was a dataset whose ground truth the workspace did not author. | ||
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| **Why weather is the right dataset for it, not merely a convenient one.** Every prior corroboration in this arc has been internal — four sessions converging, probes designed by the same people holding the thesis (thesis §5 warns explicitly that convergence can be shared blind spots as easily as shared truth). Weather supplies a **physical** ground-truth distance (field RMSE) that no one here chose, at a scale (10⁶ points) that exercises the hierarchy rather than a toy. Running the bake-off on weather answers all three questions with one number — and a **negative is thesis-relevant, not weather-relevant**: it would demote prefix-ancestry workspace-wide, which is precisely why it must be run before more is built on top. | ||
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| **Consequence for planning:** do not schedule these as three separate probes in three repos. One bake-off (`D-WX-5`), arms C vs D carrying F-1, arms A/B carrying helix's gate, all under Jirak-bounded significance (`I-NOISE-FLOOR-JIRAK` — grid fields are weakly dependent by construction; classical Berry-Esseen is wrong here). Mandatory anti-vacuity per `E-VACUOUS-ASSERTION-IS-THE-HOUSE-STYLE-1`: include a shuffled-codebook encoder that **must** fail — a bake-off where every arm passes has measured nothing. | ||
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📐 Maintainability & Code Quality | 🟠 Major | ⚡ Quick win
Restore newest-first board ordering.
The new 2026-08-08 entry appears before the existing 2026-08-09 entry at Line [17]. Move the complete 2026-08-08 entry below the complete 2026-08-09 entry. Preserve the existing historical content.
As per coding guidelines, board files must remain append-only. Based on learnings, entries must remain ordered newest-first.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/board/EPIPHANIES.md around lines 1 - 16, Move the complete
2026-08-08 entry in EPIPHANIES.md below the existing 2026-08-09 entry,
preserving all entry content and maintaining append-only history with
newest-first ordering.
Sources: Coding guidelines, Learnings
| ### 5.1 Dataset (fixed, small, external) | ||
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| - **Source:** ECMWF open data (CC-BY-4.0) via the operator's `ecmwf-opendata` | ||
| fork; ERA5 acceptable if easier to obtain in bulk. | ||
| - **Field:** **Z500** (500 hPa geopotential) — the canonical synoptic field and | ||
| the headline WeatherBench2 variable. One variable, one level. Deliberately not | ||
| the full 227. | ||
| - **Extent:** ~1,000 states (e.g. 1 yr, 6-hourly) at 0.25° = 1440×721 = | ||
| **1,038,240 points** (the operator's "1 mio"). Coarsened copies at 1° and 2.5° | ||
| as ablation rungs. |
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🗄️ Data Integrity & Integration | 🟠 Major | 🏗️ Heavy lift
Freeze the Stage-0 dataset definition.
ERA5 acceptable if easier to obtain allows the experiment to use different datasets. Fix the source, date range, analysis times, grid, regridding, missing-value policy, and input checksum. Also, one non-leap year at 6-hour intervals contains 1,460 states, not approximately 1,000. D-WX-5 is not reproducible until these values are fixed.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/plans/weather-substrate-poc-v1.md around lines 194 - 203, Update the
Stage-0 dataset definition in section 5.1 to freeze one exact source, date
range, analysis-time schedule, grid, regridding procedure, missing-value policy,
and input checksum; remove the “ERA5 acceptable” alternative. Correct the stated
state count to match the selected non-leap-year 6-hour schedule, and ensure
D-WX-5 references these fixed values.
| - **Extent:** ~1,000 states (e.g. 1 yr, 6-hourly) at 0.25° = 1440×721 = | ||
| **1,038,240 points** (the operator's "1 mio"). Coarsened copies at 1° and 2.5° | ||
| as ablation rungs. |
There was a problem hiding this comment.
🗄️ Data Integrity & Integration | 🟠 Major | 🏗️ Heavy lift
Specify area weighting for physical RMSE.
At 0.25° latitude/longitude, equal weights per grid point do not represent equal physical area. State whether RMSE uses cosine-latitude weights or an equal-area remap. Define the missing-value mask. Keep the same convention at 0.25°, 1°, and 2.5°. Otherwise the physical-distance target and ρ gate are not comparable across resolutions.
Also applies to: 234-238
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/plans/weather-substrate-poc-v1.md around lines 201 - 203, Update the
physical RMSE specification in the plan, including the corresponding
coarsened-resolution section, to explicitly define cosine-latitude weighting or
an equal-area remap, the missing-value mask, and the requirement that the same
convention applies at 0.25°, 1°, and 2.5° resolutions.
| Each arm encodes one Z500 field → a code; we then rank code-distance against | ||
| physical distance. | ||
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| | arm | encoder | bits | why it's in | | ||
| |---|---|---|---| | ||
| | **A** | `helix::Signed360` | 48 | the named candidate; signed polar + u16 azimuth | | ||
| | **B** | `helix::ResidueEdge` | 24 | is half the budget enough? | | ||
| | **C** | `bgz17::Palette` (flat k-means 256) | 8/cell | the flat control | | ||
| | **D** | `bgz17::HierarchicalPalette` (16×16) | 8/cell | **the F-1 arm** — ancestry vs flat | | ||
| | **E** | `CascadeKeyV3` 8:8 `(part_of:is_a)` tiles | 48 | the address-native reading | | ||
| | **F** | raw f32 / PCA-k | — | **honest control**; if F ≈ A the codes buy nothing | | ||
| | **G** | golden-disc PIT normalisation × A | 48 | the operator's equiprobable-code idea (§5.3) | |
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🗄️ Data Integrity & Integration | 🟠 Major | 🏗️ Heavy lift
Define one field-to-code contract for all arms.
The plan says that each Z500 field becomes a code, but the arms do not have the same object shape. Signed360 and ResidueEdge encode points, Palette and HierarchicalPalette produce per-cell codes, and arm F is a raw/PCA vector. Specify whether encoding is per cell, per tile, or field-level. Define aggregation and distance for each arm. Fix PCA k and its fitting scope. Without this contract, the Spearman comparison ranks unlike representations.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/plans/weather-substrate-poc-v1.md around lines 208 - 219, Define a
single field-to-code evaluation contract covering every arm in the comparison:
specify whether each encoder operates per cell, tile, or whole field, how
outputs are aggregated into one field representation, and which distance is
ranked against physical distance. Explicitly define arm F’s raw/PCA
representation, including a fixed PCA k and fitting scope, so all arms produce
comparable field-level distances before computing Spearman correlation.
| ### 5.3 One design note carried from the session (arm G) | ||
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| Wind speed is Weibull(≈2)/Rayleigh ⇒ probability-integral-transforming (u,v) makes | ||
| the velocity plane ~uniform on the disc, which is *exactly* the distribution the | ||
| Vogel spiral quantises optimally. So "normalise to golden 2D" is | ||
| **maximum-entropy vector quantisation**, not numerology. **Iron constraint:** the | ||
| normaliser must be a **frozen climatological CDF** (the ruler), never fitted to | ||
| the live field — otherwise we rebuild the ketchup conflation `place_buffer.rs` | ||
| was written to fix (`place_buffer.rs:1-34`, ICC 0.14 → 1.00). |
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🎯 Functional Correctness | 🟠 Major | 🏗️ Heavy lift
Remove the wind-specific assumptions from the Z500 experiment.
Arm G is justified with Weibull/Rayleigh wind statistics and a (u,v) disc, but Stage 0 uses scalar Z500. The plan gives no transform from Z500 to that vector space. The resolution check also uses wind-direction reporting and forecast-error thresholds. Define a Z500-specific PIT and sanity threshold, or remove arm G and these claims.
Also applies to: 247-251
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/plans/weather-substrate-poc-v1.md around lines 224 - 232, Update the
Z500 experiment plan to remove wind-specific Arm G assumptions, including
Weibull/Rayleigh statistics, velocity-disc/Vogel quantisation claims,
wind-direction reporting, and forecast-error thresholds. Either define a frozen
climatological scalar Z500 PIT with an appropriate Z500 sanity threshold and use
those consistently in Arm G and the resolution check, or remove Arm G and the
related claims entirely.
| - **Anti-vacuity (mandatory, per `E-VACUOUS-ASSERTION-IS-THE-HOUSE-STYLE-1`):** | ||
| arm F must be *able to lose*; include a deliberately-broken encoder (shuffled | ||
| codebook) that **must** fail the gate. A bake-off where every arm passes has | ||
| measured nothing. |
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🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win
Make the broken control a deterministic arm.
The table lists arms A-G, but this section adds a shuffled-codebook control without an arm ID. Add it to the matrix, freeze the shuffle seed, and define its failure rule. This prevents an untracked control or a different random result from changing the anti-vacuity outcome.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/plans/weather-substrate-poc-v1.md around lines 243 - 246, Update the
anti-vacuity section and the A-G arm matrix to assign the deliberately broken
shuffled-codebook encoder an explicit arm ID, freeze its shuffle seed, and
specify the deterministic failure rule requiring that arm to fail the gate.
| | id | deliverable | gate | | ||
| |---|---|---| | ||
| | **D-WX-0** | `ecmwf-opendata` fork: GRIB2 → flat f32 slab + JSON sidecar; ~1 yr Z500 to S3 | — | | ||
| | **D-WX-1** | `crates/weather-poc` scaffold (excluded, zero-dep default, perturbation-sim template) | — | | ||
| | **D-WX-2** | Arms C/D (bgz17 flat vs hierarchical) + arm F control + broken-encoder anti-vacuity | zero-dep build | | ||
| | **D-WX-3** | Arms A/B (helix `Signed360`/`ResidueEdge`) behind `helix-codec` | git-dep resolves | | ||
| | **D-WX-4** | Arms E/G (`CascadeKeyV3`; golden-disc PIT with **frozen** climatological CDF) | D-WX-2 | | ||
| | **D-WX-5** | **The bake-off report** — ρ/ICC/α matrix, Jirak-bounded, per arm × resolution | **ρ ≥ 0.98 for ≥1 arm, and the broken encoder fails** | | ||
| | **D-WX-6** | Board hygiene: EPIPHANIES entry recording the result **whichever way it goes** | D-WX-5 | |
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🎯 Functional Correctness | 🟠 Major | 🏗️ Heavy lift
Do not let a non-48-bit arm validate C2.
D-WX-5 passes when any arm reaches ρ ≥ 0.98. Arm F, C, or D could satisfy that condition while no 48-bit arm validates C2. Require at least one target arm, such as A, E, or G, to pass. State whether B is separately reported. Require the broken control to fail. Apply the same distinction to the kill rule.
Also applies to: 406-412
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In @.claude/plans/weather-substrate-poc-v1.md around lines 391 - 399, Update
D-WX-5 so its gate requires at least one 48-bit target arm, such as A, E, or G,
to achieve ρ ≥ 0.98; do not allow control or non-48-bit arms F, C, or D to
satisfy C2. State explicitly whether B is reported separately, require the
broken encoder control to fail, and apply the same target-arm versus control
distinction to the kill rule.
What
Doc-only plan for a weather POC on the substrate. Operator ask: official weather data + helix + "stockfish acceleration" + "deepseek", with the POC choice left to me, plus a comparison against
perturbation-simand a repo list.Grounded on a 5-agent parallel recon of
f675a0ff(file:line throughout, ~1.8M tokens). The recon changed the plan before it was written.The headline recon result
The POC is composition + measurement, not construction. Almost everything already exists, unwired:
helix::Signed360= 48-bit already ships (residue.rs:63-87) — and the operator's "signed in/out bit" is already there: polar = |y| in 7 bits with the hemisphere sign carried in the partition.bgz17ships BOTH arms of F-1 — flatPalette(k-means 256) andHierarchicalPalette(16×16,coarse_is_ancestor_of), with measured anchors (Full256 ρ=0.992 / Half128 ρ=0.965 / Quarter64 ρ=0.738).facet.rsalready sanctions the lane, verbatim: "A separateG2×48bitlane reads the same 12 tier-bytes … for helix (location) and CAM-PQ (centroid) encoding."dev_s3_envalready reads the operator's exact S3 var set; PR soa_verbatim: pin the physical layout, correct the compression claim, prove it over S3 #907 proved the verbatim write against that endpoint shape.stockfish-nnue-as-perturbation-cascade.md, with a mechanism-vs-rhyme ledger to reuse rather than re-derive.The POC I chose
A Stage-0 encoder bake-off — 7 arms + a deliberately-broken control over 1 yr of Z500 at 0.25° (1,038,240 pts), scored Spearman/ICC against physical RMSE under Jirak bounds (
I-NOISE-FLOOR-JIRAK), gate ρ ≥ 0.98.Chosen because it is (a) the only stage whose failure kills everything downstream, (b) the cheapest decisive experiment, and (c) it discharges three separately-named unrun probes in one run — see the EPIPHANIES entry: F-1 (hierarchical-vs-flat), helix's own ≥0.9980 gate (
KNOWLEDGE.md:338-343), and the weather-encoder question are the same measurement, differing only in dataset. Weather supplies ground truth this workspace did not author — which is the gap the thesis's §5 names as the program's real risk.Explicitly not first: re-running the loop at scale. #879/#907 already proved those; that would be confirmation, not information.
Repos
No new repository. New workspace-excluded
crates/weather-pocon the exactperturbation-simtemplate (zero-dep default, heavy deps behind off-by-default features). GRIB2 never enters Rust — Python-side slab conversion in the operator'secmwf-opendatafork.weathernextis Stage 2+ only. No classid mint needed for Stage 0.Six corrections carried in §0
Signed360azimuth u16 ⇒ 0.0055°/stepmeasure-64k-axesis 65,536 mailbox ownerskanban_actorcycle_driveris the pathsoa_to_lanceis a lib fndev_s3_env0x0Fis free0x0F=Geo; free are 0x03–0x06Also: "DeepSeek" in this workspace = GRPO/RLVR (arXiv 2402.03300), not the LLM — Stage 3, gated, and the earliest honest use is group-relative weighting of retrieved analogues.
perturbation-simcomparison (§8)Complements, not competitors — sparse/compute-bound vs dense/memory-bound. Notably: perturbation-sim derives place from the dynamics (which caused the ketchup conflation, fixed by
helix_place, ICC 0.14→1.00); weather has place given, so that conflation is structurally impossible. Reuse list:columns.rsSoaMemberSpec/GuardrailVerdict,buffer.rs::ketchup_yield,chaoda.rs::anomaly_ranking, the examples-as-probes pattern.Honesty
C1–C4 kept separate (store / encode / retrieve / beat-a-learned-model); C4 is explicitly out of scope with the reasoning for which lane is winnable.
WalSinkis still a fake ⇒ no durability claims. A negative result is a successful probe and is thesis-relevant, not weather-relevant.Doc-only · zero code · board hygiene in the same commit (INTEGRATION_PLANS + EPIPHANIES).
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