{
  "license": "CC-BY-4.0",
  "licenseUrl": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "ChainChoice (https://chainchoice.io)",
  "url": "https://chainchoice.io/data/methodology/2026.09.15.json",
  "version": "2026.09.15",
  "status": "archived",
  "publishedAt": "2026-09-16",
  "title": "Dimension scores carry tenths, and eleven more categories are re-read from primary sources",
  "supersededBy": "2026.09.16",
  "previous": "2026.09.14",
  "changelog": {
    "url": "https://chainchoice.io/methodology/changelog/archive#v-2026.09.15",
    "entry": {
      "version": "2026.09.15",
      "publishedAt": "2026-09-16",
      "title": "Dimension scores carry tenths, and eleven more categories are re-read from primary sources",
      "summary": "Two changes land together. Every dimension score now resolves to tenths of a point rather than whole points (owner decision O-04b), and step 1 of the formula carries weightedTotal to six decimal places so a distance of exactly 2.5 weighted points rounds the same way for the engine and for anyone rebuilding the order from public/data/rankings.json. Separately, every row of cdp_stablecoins, data_availability, decentralised_compute, decentralised_id, depin_networks, kyc_compliance, layer1_chains, mpc_wallets, privacy_tools, revoke_tools and yield_aggregators was re-read on 2026-09-15 against each provider’s own pricing, terms, docs and status feeds, with a second model run re-fetching every quote.",
      "rationale": "Whole-point dimension scores threw away resolution the research already had, and forced the engine to break ties that the criteria themselves could separate. Tenths keep that detail, and the fixed rounding makes the published order reconstructible from the published file rather than only reproducible inside this engine. The two changes are published as one version because they were generated in one run: separating them would state an order that was never served. The re-read evidence is committed per category in research-pending/rereads/2026-09-15-<category>.json.",
      "affectedCategories": [
        "all"
      ],
      "changes": [
        {
          "type": "changed",
          "description": "Dimension scores resolve to tenths of a point (O-04b), and weightedTotal is rounded to six decimal places before the order is read. 518 published scores move across 107 categories that were not re-read; none of them moves by more than 4 points, and most move by 1."
        },
        {
          "type": "fixed",
          "description": "66 published scores change in the eleven re-read categories, against a verbatim source each. The largest moves are Reflexer RAI (−16), Beefy and Unrekt (−11), Aztec (−10) and Golem (+9) — all of them rows whose sources had moved since their last read."
        },
        {
          "type": "changed",
          "description": "Published order moves in 38 of 119 categories and three #1s change: smart_contract_audits (Zellic → Certora) and travel_rule_compliance (Sumsub Travel Rule → CodeVASP) on the finer resolution, kyc_compliance (Veriff → Sumsub) on the re-read."
        },
        {
          "type": "added",
          "description": "availabilitySource (O-04g): for a reader who states a country, a row whose availability in that country rests on a region tag its record gives no source for sorts below every sourced row. It is inert in every order published here, which states no country."
        },
        {
          "type": "changed",
          "description": "The personalised result changes too: replaying all 2,217 golden cases, the questionnaire’s winner moves in 29 of 119 categories — among them bridges (Relay → Across), hardware_wallet (BitBox → Trezor), exchange (Upbit → Bybit/OKX), restaking (Symbiotic → EigenLayer) and liquid_staking (Coinbase → Jito → Lido). The before/after is committed as the diff of tests/fixtures/wizard-goldens."
        },
        {
          "type": "changed",
          "description": "Measured cost: answers no longer move the #1 in six categories that are not re-reads of new evidence — privacy_tools, dex_aggregator, hardware_wallet, remittances, cdp_stablecoins and web3_apps — because a finer basis separates those leaders by more than any single answer can close. hardware_wallet had come alive on 2026-09-09; it is inert again. The six are recorded as debt in check-wizard-answers-move-ranking.ts."
        },
        {
          "type": "changed",
          "description": "Corrected 2026-10-14: every published score in every category was recomputed under this version. The rows whose score or rank moved are summarised in the lines above, not each named."
        }
      ],
      "approvedBy": "mathias-siemonsmeier"
    }
  },
  "rules": {
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      "src": "git:263509bd745ef5ad1f240b34a7dc9762294b3e0c",
      "at": "2026-09-30T20:59:12+02:00",
      "note": "The category specs as committed at the last commit before the next version was recorded."
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      "yield_vaults": {
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    },
    "formula": {
      "step1_weightedTotal": "weightedTotal = round((SUM over dimensions of (breakdown[d] / baseWeight[d]) * weight[d]) / (SUM of weight[d]) * 86, 6 decimal places), where every breakdown[d] is a multiple of 0.1",
      "step2_absoluteScore": "absolute = min(99, max(40, round(weightedTotal <= 20 ? 40 + weightedTotal * ((60 + (20 / 86) * 38 - 40) / 20) : 60 + (weightedTotal / 86) * 38)))",
      "step3_poolRelative": "score = round(min(min(99, max(41, leaderScore - (leaderWeighted - weightedTotal) * 2.6)), scoreOfRowAbove))",
      "tieBreakChain": [
        "availabilitySource, for a reader who states a country only: in perp_dex, perp_house_vaults, options_vaults, prediction_markets, a row whose availability in that country rests on a region tag its record gives no source for (no availability note quoting the provider's terms, and no dated country entry) sorts below every row whose availability is sourced. No row carries it in the orders published in this file, which state no country.",
        "weightedTotal as step 1 states it, higher first. Only rows whose weighted totals are exactly equal reach the keys below.",
        "unroundedWeightedTotal, higher first: step 1 over the dimension points before they are kept to a tenth of a point, published per product. Since methodology v2 a shared weighted total from different unrounded points is ordered by those points, so only rows equal on both reach the keys below.",
        "criteriaAverage, higher first: the row's unrounded weighted average of its published criterion scores (0 to 10) under the weights in use. Applied only when both rows are scored on their category's criteria and the averages differ; otherwise the keys below decide. Since methodology 2026.09.12.",
        "tiebreakDelta, higher first: the sum of three factors. (1) Price: when the category has one comparable pricing basis that may decide rank (priced for at least two of its catalog rows, not an entry-plan figure derived from a price ladder, and quoted in a single currency), a priced row earns 0 to 2 points in proportion to where its price sits between the highest and the lowest in the pool, or 1 point when every published price on that basis is equal; a row with no price on that basis, and every row of a category without such a basis, earns 0. (2) Strength: 1 point when at least three of the row's catalog fitStrength values are 9 or above; those values are its published criterion scores, plus further strength keys on some rows. (3) Dimension: 1 point when the row scores at least 85% of the maximum on the highest-weighted dimension of the weights in use (the first in weights order when two are equal). A row outside the alternate product catalog (every payment_gateway row) carries 0. It orders rows and is never added to a score.",
        "objectiveFit points, higher first.",
        "product name, alphabetical."
      ],
      "tieBreakNote": "The published per-category tieBreakRules are not yet applied by the engine; where two rows share a weighted total and an unrounded weighted total, the chain above decides. Since methodology 2026.09.12 the first key after the totals is the two rows' unrounded weighted criterion averages, so a tie between rows scored on the published criteria is ordered by those criteria; the generic factors decide only where the averages are equal or a row has no criterion scores. tieBreakDecisions counts only pairs equal on both totals, and againstCriteria lists any of them still ordered against the criteria.",
      "note": "boundBy names which limit decided the number when one did: floor, ceiling, row-above, or none. Rows marked floor sit at 41 and the multiplication alone gives a lower figure.",
      "baseWeights": {
        "availability": 20,
        "objectiveFit": 30,
        "frictionFit": 10,
        "trustBonus": 8,
        "quantitative": 18
      },
      "unweightedDimensions": [
        "profileFit"
      ],
      "unweightedNote": "These dimensions are computed and published in every breakdown but carry no weight in the total. profileFit left the composite in methodology 2026.09.2: it was constant inside all 114 categories, so its 20 points moved every product in a pool identically and ordered nothing. Sum the breakdown against baseWeights and the unweighted terms are simply absent from the arithmetic — that is the intended reading, not an omission.",
      "weightVersusInfluence": "A base weight is how much a dimension COULD move a score, not how much it did. Each category publishes dimensionSpread: the range that dimension actually covered across its pool. A spread of 0 means the dimension was constant there and decided nothing, however large its weight.",
      "objectiveBasis": "Each product names where its objectiveFit points came from. \"criteria\": the block is the weighted sum of the published criterion cells, min(30, 0.75 × Σ weight × cell/10 × 32) kept to a tenth of a point, and a pairwise ledger can itemise it per criterion. \"whole\": the category scores the block from structural facts or capability flags rather than per-criterion cells, so it enters a ledger as one term. \"sunset\": the product no longer operates (sunsetAt gives the date) and the block is zeroed regardless of its cells.",
      "totalBaseWeight": 86,
      "dimensionResolution": 0.1,
      "weightedTotalDecimals": 6,
      "resolutionNote": "Since methodology v2 every breakdown value is kept to dimensionResolution (a tenth of a point) before it is weighted, and each product also publishes unroundedWeightedTotal: step 1 over its points before that rounding. Two products that share a weightedTotal are ordered by unroundedWeightedTotal before any key of tieBreakChain after it.",
      "spreadPerWeightedPoint": 2.6,
      "scoreFloor": 41,
      "scoreCeiling": 99,
      "leaderRobustnessNote": "leaderSurvivesOnePointChange: whether this category keeps its #1 when any single criterion score moves by one point on the 0-10 scale — the smallest difference two competent raters can hold. False in 33 of 118 categories. A false does not mean the ranking is wrong; it means the evidence separates the top two by less than the width of a judgement call, and the file says so rather than letting the displayed gap imply otherwise. null means the sweep could not run — too few criteria or too small a pool — and is deliberately not reported as robust."
    },
    "recipe": "sha256 is the SHA-256 of the category spec (the file's \"spec\" field) written as compact JSON: every object's keys sorted, no spaces or line breaks, non-ASCII characters as UTF-8 (not escaped), no trailing newline. That is the serialisation of the rankings digest."
  },
  "rankings": {
    "ledger": "https://chainchoice.io/data/rankings-ledger.jsonl",
    "produced": [
      {
        "seq": 3560,
        "rankingsDigest": "2e89b88b3872108c9244eb3c554210f9a66c8262c676c6d2c41191d22c3f0185",
        "ob": "2026-09-16",
        "src": "git:8a10765a270b832283a95ae5afcdd5197c145e00",
        "engine": "2026.09.15"
      },
      {
        "seq": 3642,
        "rankingsDigest": "1529a3b185528017f5605dd4990a5c1a7a2f02b01113ec8e7583e8f852c4d294",
        "ob": "2026-09-27",
        "src": "git:7c20f348bb4264d11e6920b464fc6101bd631a58",
        "engine": "2026.09.15"
      },
      {
        "seq": 3697,
        "rankingsDigest": "e1eb24980abb51668d59af44b58e827d7a27ae1b19b646740329aedd81002843",
        "ob": "2026-09-28",
        "src": "git:63f2701ebf1e49ad5fdbf00382eb3eb2f7fb236f",
        "engine": "2026.09.15"
      },
      {
        "seq": 3798,
        "rankingsDigest": "d8df9c2da8d8051dbbf67c8ba4af79ca7a3838874faa27c8a561a18d2c39e9c4",
        "ob": "2026-09-28",
        "src": "git:200483dac3d97322c2cd13c127556a25b633a5b4",
        "engine": "2026.09.15"
      },
      {
        "seq": 3939,
        "rankingsDigest": "d9d8ab9c70992c597d6582bb8f2c0b66cc6f22b7bb887a1b871471811418327e",
        "ob": "2026-09-29",
        "src": "git:7765b5de0cdf2f6b84e807721c728af7c6885df2",
        "engine": "2026.09.15"
      },
      {
        "seq": 3986,
        "rankingsDigest": "a3731260c09d7bef5facd69b24743976691305109a898b8d4a78483100c6b333",
        "ob": "2026-09-30",
        "src": "git:c7d49df3ecec66129dc82e3a9b7cbf8a10dfaec2",
        "engine": "2026.09.15"
      },
      {
        "seq": 3997,
        "rankingsDigest": "f80d263a6064b591c531a017d8695e28492e424c3e23d3aab9c07d8c09f4c7c1",
        "ob": "2026-09-30",
        "src": "git:6dd78d9ff37acc7f0f00c8e345317ba931b3449b",
        "engine": "2026.09.15"
      },
      {
        "seq": 4007,
        "rankingsDigest": "d4f4236d55c89de160a81369dc5c5e9de82f03d884d1fdc739a88d8c53759ca6",
        "ob": "2026-09-30",
        "src": "git:927da9d5d7577e70772184f065505ad5b854e89e",
        "engine": "2026.09.15"
      },
      {
        "seq": 4021,
        "rankingsDigest": "0e40aea78d0ca0b8c1d5f17e5611593e3185481f7c646d882272eb0395b27336",
        "ob": "2026-09-30",
        "src": "git:83398efb5c7ebd4796525577cb794b4757511d20",
        "engine": "2026.09.15"
      }
    ],
    "whenIntroduced": "2e89b88b3872108c9244eb3c554210f9a66c8262c676c6d2c41191d22c3f0185",
    "whenSuperseded": "0e40aea78d0ca0b8c1d5f17e5611593e3185481f7c646d882272eb0395b27336",
    "newest": null,
    "note": "produced lists the ledger's digest entries whose rankings.json was generated while this version was the newest changelog entry (seq is the entry's place in the ledger). whenIntroduced and whenSuperseded are the digests of the rankings.json committed with the first and the last commit of this version."
  },
  "gaps": [],
  "notes": [
    "The category specs changed in 3 commit(s) after this version was recorded and before it was superseded, without a new changelog version. This archive holds the last of those states, the one the next version changed."
  ]
}