diff --git a/docs/research/repo-memory.md b/docs/research/repo-memory.md
index 073954a..30c90b1 100644
--- a/docs/research/repo-memory.md
+++ b/docs/research/repo-memory.md
@@ -498,3 +498,22 @@ Editorial PR landing the PR #131 sort + filter comparator wedge on the homepage.
 - **PR #129 streaming reframe** — still awaiting user prose review. Touches `ComparisonTable.tsx` (streaming-row rename) and `ReceiptsBand.tsx`. File-level conflict with this PR is limited to the docblock at the top of `ComparisonTable.tsx`; resolvable.
 - **High-repeat protocol for interaction borderlines** — logged here.
 - **Pretable `scroll-with-render` 16.4 ms anomaly** — logged in the 2026-05-10 entry above; still pending investigation.
+
+## 2026-05-12
+
+### Comparator-aware evaluators — architecture change
+
+Six pretable-only evaluators in `scripts/bench-matrix.mjs` (H6, H7, H8 interaction + H19, H20, H21 cell-renderer) now embed comparator-adapter evidence in their `evidence` arrays. Mirrors `evaluateH1`'s pre-existing pattern. Status logic unchanged — pretable's absolute thresholds still drive verdicts; comparator data is informational. Replaces (over time) the per-PR aggregator-script pattern that fed the `/bench` page through PRs #130, #131, #132.
+
+- New `findComparatorEvidence(runs, { scenarioId, scriptName })` helper in `scripts/bench-matrix.mjs` returns all non-pretable adapter series for a slice via `groupRunSeries` + `summarizeRunSeriesEvidence`. Single helper used by all six target evaluators.
+- Each of H6/H7/H8/H19/H20/H21 appends `...comparatorEvidence` to its `evidence:` array in every return branch (insufficient / failing / satisfied / directional). For `insufficient` branches without pretable data, the evidence array stays empty — comparator data alone doesn't satisfy any hypothesis.
+- H19 (format overhead) keeps pretable's format + scroll-baseline entries at the front of the array; comparator entries are absolute `scroll-with-format` p95, NOT format-vs-baseline deltas. Inline docblock documents the semantics so future readers don't conflate the two.
+- Six new test cases in `scripts/__tests__/bench-matrix.test.mjs` assert evidence-array contents when comparator runs are present. All existing status-verdict tests untouched.
+- Matrix re-run at 4 adapters × 7 scripts × 3 repeats = 84 runs. The matrix runner bailed mid-run twice (one tanstack/filter-metadata locator-timing flake, one preview-server `ECONNREFUSED`); recovered by running the surviving adapters (`tanstack,mui`) as a second invocation, then synthesizing the milestone from all on-disk per-run summaries via a one-shot script that called `createHypothesisReport` directly. All four adapters are present in every H6/H7/H8/H19/H20/H21 evidence array.
+- Milestone: `status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json`. All seven hypotheses (H1, H6–H8, H19–H21) retained `satisfied` status — architectural change was data-only.
+
+### Out of scope (deferred)
+
+- **`/bench` page swap to read from `hypotheses.json` directly.** Aggregator scripts (`scripts/extract-interaction-summary.mjs` + the inline aggregators) still feed the page; can be retired once the page reads from the new milestone shape. Editorial-only PR.
+- **Per-adapter format-overhead deltas in H19.** Currently H19's status compares pretable's `scroll-with-format` p95 against pretable's `scroll` baseline; comparator evidence surfaces absolute format p95 only. Computing per-adapter deltas would extend H19 from a pretable-quality check into a comparative-overhead check — a different hypothesis.
+- **Matrix runner reliability.** Mid-run flakes (locator timeouts, preview-server connection refused) have hit multiple recent PRs (#133, #134, this one). The bail-on-first-failure behavior wastes a 5-minute run when a single repeat flakes; a `--continue-on-error` option plus a runset-merge pathway would be a useful runner enhancement.
diff --git a/docs/superpowers/plans/2026-05-12-comparator-aware-evaluators.md b/docs/superpowers/plans/2026-05-12-comparator-aware-evaluators.md
new file mode 100644
index 0000000..f15d719
--- /dev/null
+++ b/docs/superpowers/plans/2026-05-12-comparator-aware-evaluators.md
@@ -0,0 +1,316 @@
+# Comparator-Aware Evaluators Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Extend six evaluators (H6, H7, H8, H19, H20, H21) in `scripts/bench-matrix.mjs` to include comparator evidence in their `evidence` arrays. Mirrors `evaluateH1`'s pattern. Status logic unchanged.
+
+**Architecture:** Per the spec at `docs/superpowers/specs/2026-05-12-comparator-aware-evaluators-design.md`. Single PR. Auto-merge if all six hypothesis statuses stay at their existing values; hold for review if any status flips.
+
+**Tech Stack:** TypeScript, Node test runner, Playwright (Chromium). No new dependencies.
+
+**Spec:** [`docs/superpowers/specs/2026-05-12-comparator-aware-evaluators-design.md`](../specs/2026-05-12-comparator-aware-evaluators-design.md)
+
+**Working directory:** `/Users/blove/repos/pretable/.worktrees/comparator-aware-evaluators`.
+
+---
+
+## File Structure
+
+```
+scripts/
+├── bench-matrix.mjs                    (MODIFY: extend evaluateH6, H7, H8, H19, H20, H21)
+└── __tests__/bench-matrix.test.mjs     (MODIFY: add comparator-evidence test per evaluator)
+
+status/milestones/
+└── 2026-05-12-comparator-aware-evaluators.hypotheses.json   (NEW: matrix re-run output)
+
+docs/research/
+└── repo-memory.md                       (MODIFY: 2026-05-12 entry — evaluator architecture)
+```
+
+---
+
+## Task 1 — Read H1 as the reference shape
+
+- [ ] **1.1** Open `scripts/bench-matrix.mjs` and locate `evaluateH1`. Note how it:
+  - Uses `findRunSeries` to find pretable's series.
+  - Uses `groupRunSeries(runs, { scenarioId, scriptName }).filter(s => s[0]?.adapterId !== "pretable")` to find competitor series.
+  - Uses `summarizeRunSeriesEvidence(series)` to produce each evidence entry.
+  - Picks a "best full-grid competitor" and a "best virtualization-primitive competitor" via `medianMetric` comparisons.
+  - Returns `evidence: [pretableEvidence, bestFullGridEvidence, ...(bestPrimitiveEvidence ? [bestPrimitiveEvidence] : [])]`.
+
+  This is the model. The six target evaluators will surface ALL comparator entries (not just the best per family) since the comparison story is different — for H6/H7/H8/H19/H20/H21 we want every comparator's number visible.
+
+- [ ] **1.2** Read each of the six target evaluators (`evaluateH6`, `evaluateH7`, `evaluateH8`, `evaluateH19`, `evaluateH20`, `evaluateH21`) to understand the existing shape before editing.
+
+## Task 2 — Helper for comparator-evidence lookup
+
+- [ ] **2.1** Add a helper function near the top of the evaluator section of `scripts/bench-matrix.mjs` (above `evaluateH1`). Single helper, used by all six evaluators:
+
+  ```js
+  /**
+   * Find comparator-adapter series for the given (scenarioId, scriptName)
+   * slice and return their evidence summaries. Pretable is excluded —
+   * callers are expected to construct pretable evidence separately. Each
+   * returned entry is the same shape as summarizeRunSeriesEvidence's output,
+   * matching the evidence-array contract used by all evaluators.
+   *
+   * Used by H6/H7/H8 (interaction) and H19/H20/H21 (cell-renderer) to
+   * surface comparator metrics alongside pretable in their evidence arrays.
+   * Status verdicts remain pretable-only; this data is informational.
+   */
+  function findComparatorEvidence(runs, { scenarioId, scriptName }) {
+    const series = groupRunSeries(runs, { scenarioId, scriptName }).filter(
+      (s) => s[0]?.adapterId && s[0].adapterId !== "pretable",
+    );
+    return series.map((s) => summarizeRunSeriesEvidence(s));
+  }
+  ```
+
+- [ ] **2.2** Typecheck:
+  ```
+  pnpm --filter "@pretable-internal/bench-runner" typecheck
+  ```
+  Expected: passes. (bench-matrix.mjs is JS, not TS, so typecheck just covers the package; the .mjs is linted separately.)
+
+## Task 3 — Extend H6 (sort)
+
+- [ ] **3.1** In `evaluateH6` (around line 613), find the `return { id: "H6", ..., evidence: [...] }` shape.
+
+- [ ] **3.2** Just before the return, compute comparator evidence:
+
+  ```js
+  const comparatorEvidence = findComparatorEvidence(runs, {
+    scenarioId,
+    scriptName: "sort",
+  });
+  ```
+
+  Update each return statement in `evaluateH6` to spread `...comparatorEvidence` after the pretable evidence in the array. There may be multiple returns (insufficient / failing / satisfied branches); update them all.
+
+  Skeleton (illustrative, adapt to actual evaluator code):
+
+  ```js
+  return {
+    id: "H6",
+    status: ...,
+    summary: ...,
+    evidence: [pretableEvidence, ...comparatorEvidence],
+  };
+  ```
+
+  Note: for `insufficient` returns where `pretableEvidence` isn't built (no pretable series), keep the existing `evidence: []` — comparator data alone doesn't satisfy any version of H6.
+
+- [ ] **3.3** Run the bench-matrix tests:
+
+  ```
+  node --test scripts/__tests__/bench-matrix.test.mjs
+  ```
+
+  Expected: all existing tests still pass. The evidence array now has more entries but existing tests check status + summary, not evidence-length.
+
+- [ ] **3.4** Commit:
+  ```
+  git add scripts/bench-matrix.mjs
+  git commit -m "feat(bench-matrix): H6 evaluator surfaces comparator evidence"
+  ```
+
+## Task 4 — Extend H7 (filter-metadata)
+
+- [ ] **4.1** In `evaluateH7`, repeat the Task 3 pattern with `scriptName: "filter-metadata"`.
+
+- [ ] **4.2** Run tests, commit:
+  ```
+  node --test scripts/__tests__/bench-matrix.test.mjs
+  git add scripts/bench-matrix.mjs
+  git commit -m "feat(bench-matrix): H7 evaluator surfaces comparator evidence"
+  ```
+
+## Task 5 — Extend H8 (filter-text)
+
+- [ ] **5.1** Same pattern with `scriptName: "filter-text"`.
+
+- [ ] **5.2** Run tests, commit `feat(bench-matrix): H8 evaluator surfaces comparator evidence`.
+
+## Task 6 — Extend H19 (format overhead)
+
+- [ ] **6.1** H19 is structured around comparing pretable's `scroll-with-format` p95 against pretable's `scroll` baseline. The comparator extension surfaces each comparator's `scroll-with-format` evidence (not deltas — see spec's non-goals; per-adapter format-vs-baseline deltas are a future enhancement).
+
+  In `evaluateH19`, add the comparator lookup:
+
+  ```js
+  const comparatorEvidence = findComparatorEvidence(runs, {
+    scenarioId: "S2",
+    scriptName: "scroll-with-format",
+  });
+  ```
+
+  Append `...comparatorEvidence` to each return's `evidence` array. Keep the existing pretable format + pretable scroll baseline entries at the front.
+
+  Add a comment near the evidence array clarifying the semantics:
+
+  ```js
+  // evidence shape: [pretable format-overhead summary, pretable scroll
+  // baseline summary, ...comparator scroll-with-format absolute summaries].
+  // Pretable's first two entries form the format-overhead delta the H19
+  // status verdict consumes; comparator entries are absolute format p95
+  // for cross-adapter reference, NOT deltas vs their own scroll baselines.
+  ```
+
+- [ ] **6.2** Run tests, commit `feat(bench-matrix): H19 evaluator surfaces comparator format evidence`.
+
+## Task 7 — Extend H20 (cheap-render scroll)
+
+- [ ] **7.1** Same pattern with `scriptName: "scroll-with-render"`.
+
+- [ ] **7.2** Run tests, commit `feat(bench-matrix): H20 evaluator surfaces comparator evidence`.
+
+## Task 8 — Extend H21 (heavy-render scroll)
+
+- [ ] **8.1** Same pattern with `scriptName: "scroll-with-heavy-render"`.
+
+- [ ] **8.2** Run tests, commit `feat(bench-matrix): H21 evaluator surfaces comparator evidence`.
+
+## Task 9 — Add test coverage
+
+- [ ] **9.1** For each of the six evaluators, add ONE new test asserting the comparator-evidence behavior. Mirror an existing test (e.g., `evaluateH6 satisfied when pretable sort latency is under threshold`) but include comparator runs in the input, and assert:
+
+  ```js
+  test("evaluateH6 evidence array includes comparator entries when comparator runs are present", () => {
+    const runs = [
+      createInteractionRun({ adapterId: "pretable", scenarioId: "S2", scriptName: "sort", ... }),
+      createInteractionRun({ adapterId: "ag-grid", scenarioId: "S2", scriptName: "sort", ... }),
+      createInteractionRun({ adapterId: "tanstack", scenarioId: "S2", scriptName: "sort", ... }),
+      createInteractionRun({ adapterId: "mui", scenarioId: "S2", scriptName: "sort", ... }),
+    ];
+    const result = evaluateH6(runs);
+    expect(result.evidence.length).toBe(4); // pretable + 3 comparators
+    expect(result.evidence.map((e) => e.adapterId).sort()).toEqual(
+      ["ag-grid", "mui", "pretable", "tanstack"]
+    );
+  });
+  ```
+
+  Adapt the test helper invocation to whatever `createInteractionRun` / `createScrollRun` factory the test file already has. Read the file for the existing helper before writing the test.
+
+- [ ] **9.2** Run all matrix-runner tests:
+
+  ```
+  node --test scripts/__tests__/bench-matrix.test.mjs
+  ```
+
+  Expected: 6 new tests pass; all existing tests still pass.
+
+- [ ] **9.3** Commit:
+  ```
+  git add scripts/__tests__/bench-matrix.test.mjs
+  git commit -m "test(bench-matrix): comparator-evidence assertions for H6/H7/H8/H19/H20/H21"
+  ```
+
+## Task 10 — Matrix re-run
+
+- [ ] **10.1** Build the harness:
+
+  ```
+  pnpm --filter @pretable/app-bench build
+  ```
+
+- [ ] **10.2** Run the matrix:
+
+  ```
+  pnpm bench:matrix \
+    --project=chromium \
+    --adapters=pretable,ag-grid,tanstack,mui \
+    --scenarios=S2 \
+    --scripts=scroll,sort,filter-metadata,filter-text,scroll-with-format,scroll-with-render,scroll-with-heavy-render \
+    --scale=hypothesis \
+    --repeats=3
+  ```
+
+  Use `Bash run_in_background: true` since this is ~5 min wall-clock. 7 scripts × 4 adapters × 3 repeats = 84 runs.
+
+- [ ] **10.3** Wait for the matrix to complete (poll sparingly via `pgrep -f bench-matrix`). When done, locate the runset:
+
+  ```
+  ls -lt status/runsets/ | head -3
+  ```
+
+- [ ] **10.4** Read `status/runsets/<id>/hypotheses.json` and verify:
+  - H1 status: matches existing milestone (satisfied at parity).
+  - H6/H7/H8 status: each `satisfied` (pretable absolute thresholds unchanged).
+  - H19/H20/H21 status: each `satisfied` (cell-renderer absolute thresholds unchanged).
+  - Each of H6/H7/H8/H19/H20/H21 has 4 evidence entries (pretable + 3 comparators).
+  - If any status flips unexpectedly, STOP and report DONE_WITH_CONCERNS — don't change thresholds.
+
+- [ ] **10.5** Copy the runset to the milestone path:
+
+  ```
+  cp status/runsets/<id>/hypotheses.json status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json
+  ```
+
+- [ ] **10.6** Commit:
+
+  ```
+  git add status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json
+  git commit -m "chore(bench): matrix milestone for comparator-aware evaluators
+
+  H6/H7/H8/H19/H20/H21 now embed comparator evidence in their evidence
+  arrays. Pretable-only status verdicts unchanged."
+  ```
+
+## Task 11 — Repo-memory entry
+
+- [ ] **11.1** Append a 2026-05-12 entry to `docs/research/repo-memory.md`:
+  - Architecture summary: evaluators now embed comparator evidence; H1's pattern reused.
+  - Status logic unchanged (pretable thresholds drive verdicts).
+  - Test coverage extended for all six evaluators.
+  - Matrix re-run committed at the new milestone path.
+  - Note that the aggregator scripts from PRs #130/#131/#132 are now redundant for `hypotheses.json` consumers, but still feed the `/bench` page; a future PR can swap the page to read from `hypotheses.json` directly and retire the aggregators.
+
+- [ ] **11.2** Commit:
+  ```
+  git add docs/research/repo-memory.md
+  git commit -m "docs(research): repo-memory entry — comparator-aware evaluators"
+  ```
+
+## Task 12 — Gates + PR
+
+- [ ] **12.1** Repo-wide gates:
+
+  ```
+  pnpm -w typecheck && pnpm -w test && pnpm -w lint && pnpm format
+  ```
+
+  Expected: all pass. The evaluator changes are JS in `scripts/`; typecheck doesn't cover them but lint does.
+
+- [ ] **12.2** Push + open PR:
+
+  ```
+  git push -u origin comparator-aware-evaluators
+  gh pr create --title "feat(bench-matrix): H6-H8 + H19-H21 evaluators embed comparator evidence" --body "..."
+  ```
+
+  PR body covers: summary, the evaluator shape change, the matrix re-run, what's NOT in this PR (no /bench page changes, no threshold changes, no aggregator-script retirement).
+
+- [ ] **12.3** Auto-merge decision per the spec:
+  - If all six hypotheses retained their existing `satisfied` status → `gh pr merge --auto --squash`.
+  - If anything flipped → HOLD for user review (surface in the PR body and end-of-task report).
+
+---
+
+## Self-review
+
+| Spec section                        | Plan task                                              |
+| ----------------------------------- | ------------------------------------------------------ |
+| Evaluator extension pattern         | Tasks 2 (helper) + 3–8 (per-evaluator)                 |
+| Per-evaluator slice definitions     | Tasks 3–8 use the right (scenarioId, scriptName) tuple |
+| Test updates                        | Task 9                                                 |
+| Matrix re-run                       | Task 10                                                |
+| Sanity check on verdicts            | Task 10.4                                              |
+| H19 format-overhead semantics drift | Task 6.1 inline comment                                |
+
+All sections covered.
+
+No placeholders outside the PR-body template (those are intentional). Type/value consistency: `findComparatorEvidence` signature is consistent across all six callers; helper returns the same shape as `summarizeRunSeriesEvidence`.
+
+Scope: single PR, 12 tasks, ~10 commits-of-record. Auto-mergeable unless verdicts flip.
diff --git a/docs/superpowers/specs/2026-05-12-comparator-aware-evaluators-design.md b/docs/superpowers/specs/2026-05-12-comparator-aware-evaluators-design.md
new file mode 100644
index 0000000..9831a1d
--- /dev/null
+++ b/docs/superpowers/specs/2026-05-12-comparator-aware-evaluators-design.md
@@ -0,0 +1,111 @@
+# Comparator-Aware Evaluators Design
+
+**Date:** 2026-05-12
+**Status:** Draft (awaiting user review before plan)
+**Predecessors:** [PR #130 cell-renderer comparators](../../research/repo-memory.md), [PR #131 sort+filter comparators](../../research/repo-memory.md), [PR #132 homepage interaction wedge refresh](../../research/repo-memory.md).
+
+---
+
+## Goal
+
+Extend the six pretable-only evaluators (H6, H7, H8 interaction + H19, H20, H21 cell-renderer) in `scripts/bench-matrix.mjs` to include comparator-adapter evidence in their `evidence` arrays. Same pattern as `evaluateH1`, which already surfaces competitor series alongside pretable. Result: `hypotheses.json` becomes a single source of truth for cross-adapter perf data, retiring (eventually) the per-PR aggregator scripts currently feeding the `/bench` page.
+
+## Why
+
+After PRs #130–#132 opened the supportedScripts gate on cell-renderer and sort/filter scripts for all four adapters, the matrix captures comparator runs but the H6/H7/H8/H19/H20/H21 evaluators only summarize pretable's row in their `evidence` arrays. Consumers needing cross-adapter data (the `/bench` page, the homepage's `ComparisonTable`, future tools) have to read per-run summary files via aggregator scripts — that pattern was acceptable for one PR but has now repeated three times (PR #130 cell-renderer, PR #131 sort+filter, PR #132 interaction homepage refresh).
+
+H1 already implements the right shape: its `evidence` array contains pretable's summary plus the best-full-grid comparator and the best virtualization-primitive comparator. Reuse that shape on the six other evaluators.
+
+## Non-goals
+
+- **No threshold or status-logic changes.** Pretable's absolute thresholds still drive verdicts; comparator data is informational. This avoids unintentional status flips.
+- **No `/bench` page update.** The page still reads its aggregator JSONs from PRs #130/#131/#132. A separate follow-up can swap it to read from `hypotheses.json` once the new evidence shape is proven. Out of scope.
+- **No new hypotheses.** Six existing evaluators get richer; no H22+ added.
+- **No homepage update.** Same reasoning as the `/bench` page.
+- **No cross-browser data.** Chromium-only, mirroring all prior B2 work.
+- **No re-thresholding of H6/H7/H8** despite PR #134's finding that pretable's filter-text + filter-metadata land over the 16 ms single-frame budget. That re-thresholding is editorial / scoping work — separate from this architectural change. The evaluator thresholds stay as-is; this PR just adds data alongside.
+
+## Architecture
+
+### Evaluator extension pattern
+
+Each of the six target evaluators currently:
+
+1. Finds pretable's series for the relevant slice.
+2. Computes pretable's metrics (`summarizeRunSeriesEvidence`).
+3. Applies absolute thresholds → status.
+4. Returns `{ id, status, summary, evidence: [pretableEvidence] }`.
+
+The extension:
+
+1. Same steps 1–3.
+2. Find each comparator's series for the same (scenarioId, scriptName) slice.
+3. Summarize each comparator that has a completed series.
+4. Append each comparator's evidence to the array: `evidence: [pretableEvidence, ...comparatorEvidences]`.
+5. Status unchanged — still pretable-only thresholds.
+
+The comparator lookup mirrors `evaluateH1`'s `groupRunSeries(runs, { scenarioId, scriptName }).filter(...)` pattern — same helper functions, no new utilities needed.
+
+### Per-evaluator slice definitions
+
+| Evaluator     | Scenario | Script                                               | Comparators                                                                              |
+| ------------- | -------- | ---------------------------------------------------- | ---------------------------------------------------------------------------------------- |
+| `evaluateH6`  | S2       | `sort`                                               | ag-grid, tanstack, mui                                                                   |
+| `evaluateH7`  | S2       | `filter-metadata`                                    | ag-grid, tanstack, mui                                                                   |
+| `evaluateH8`  | S2       | `filter-text`                                        | ag-grid, tanstack, mui                                                                   |
+| `evaluateH19` | S2       | `scroll-with-format` (compared to `scroll` baseline) | ag-grid, tanstack, mui — but only on `scroll-with-format` slice; baseline stays pretable |
+| `evaluateH20` | S2       | `scroll-with-render`                                 | ag-grid, tanstack, mui                                                                   |
+| `evaluateH21` | S2       | `scroll-with-heavy-render`                           | ag-grid, tanstack, mui                                                                   |
+
+H19 is the tricky one: its current verdict compares format-overhead (`scroll-with-format`) against a `scroll` baseline, both pretable. The comparator data adds value on the `scroll-with-format` slice (comparator's format overhead vs its own scroll baseline would be a deeper extension; out of scope). For H19 we surface comparator `scroll-with-format` evidence alongside pretable's existing format + baseline; comparators' format-vs-baseline overhead is informational, not gated.
+
+### Test updates
+
+`scripts/__tests__/bench-matrix.test.mjs` has existing tests for each evaluator. Two new tests per evaluator:
+
+1. Positive: with comparator runs in the input, the evidence array contains comparator entries.
+2. Regression: with no comparator runs, the existing pretable-only behavior is unchanged.
+
+Existing positive/negative tests (status verdicts) stay unchanged since status logic is unmodified.
+
+### Matrix re-run
+
+One matrix invocation to produce a fresh milestone with all six evaluators populated:
+
+```
+pnpm bench:matrix \
+  --project=chromium \
+  --adapters=pretable,ag-grid,tanstack,mui \
+  --scenarios=S2 \
+  --scripts=scroll,sort,filter-metadata,filter-text,scroll-with-format,scroll-with-render,scroll-with-heavy-render \
+  --scale=hypothesis \
+  --repeats=3
+```
+
+7 scripts × 4 adapters × 3 repeats = 84 runs. Wall-clock ~5 min based on PR #131 / PR #132 precedent.
+
+Milestone path: `status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json`. The original B2 / autosize / sort-filter / cell-renderer milestones stay intact.
+
+### Sanity check on existing verdicts
+
+After the matrix runs, compare the new hypotheses.json statuses to the existing milestone status entries (pre-existing from PRs #127/#130/#131). All six should retain their current `satisfied` status — the evaluator logic for status didn't change, only the evidence shape. If anything flips, that's either a runtime fluke (re-run once) or an evaluator bug surfaced by the refactor (STOP and investigate).
+
+## Out of scope follow-ups
+
+- **`/bench` page swap to read from hypotheses.json.** Smaller editorial PR after this lands.
+- **Retire aggregator scripts** (`scripts/extract-interaction-summary.mjs` and the inline aggregators baked into earlier milestones). Once the page reads from hypotheses.json, the aggregators can go.
+- **H19 comparator-format-overhead semantics.** Currently H19 = pretable's format overhead vs pretable's scroll baseline. The comparator version would be each comparator's format-overhead vs its own scroll baseline (a per-adapter delta). Surface comparator format p95 alongside but don't compute their deltas — that's a future enhancement.
+- **The 4 editorial recommendations from PR #134** (homepage prose updates, ComparisonTable budget column, TanStack trail-marker, pretable filter perf-fix investigation). Pending user editorial review on #134.
+
+## Risks
+
+- **Evaluator output shape change might break downstream consumers.** Mitigation: the `/bench` page reads aggregator JSONs, not `hypotheses.json` directly. The matrix-runner tests cover shape; if anything reads `hypotheses.json` evidence shape, that surfaces in `pnpm -w test`.
+- **Comparator series lookup edge cases.** If a comparator has `status: "unsupported"` for the slice (which doesn't happen for the six target scripts anymore since the gate was opened), the existing helpers handle it. Verified by reading `evaluateH1`'s pattern.
+- **H19 format-overhead semantics drift.** If a future reader assumes the H19 evidence array represents format-overhead deltas for every entry, they'd be wrong — only pretable's entry is the delta; comparator entries are absolute format p95. Document this in the evaluator's docblock to head off confusion.
+
+## Test plan
+
+- Unit: each of six evaluators gains a "with comparator runs, evidence array includes comparator entries" test.
+- Unit: each of six evaluators retains its existing status-logic tests (no changes to those).
+- Integration: `pnpm -w test` passes (existing matrix-runner test suite covers report shape).
+- Manual: matrix re-run produces a fresh milestone JSON; spot-check that H6/H7/H8/H19/H20/H21 evidence arrays each contain 4 entries (pretable + 3 comparators).
diff --git a/scripts/__tests__/bench-matrix.test.mjs b/scripts/__tests__/bench-matrix.test.mjs
index b56e2d2..1a13347 100644
--- a/scripts/__tests__/bench-matrix.test.mjs
+++ b/scripts/__tests__/bench-matrix.test.mjs
@@ -2724,3 +2724,234 @@ test("evaluateH22 directional when no comparator data", () => {
   assert.equal(result.id, "H22");
   assert.equal(result.status, "directional");
 });
+
+// --------------------------------------------------------------------------
+// Comparator-aware evidence assertions for H6/H7/H8/H19/H20/H21
+//
+// These six evaluators surface every measured comparator adapter in their
+// evidence array (status verdicts remain pretable-only). The tests below
+// pin that contract: when pretable + 3 comparator runs are supplied, the
+// evidence array contains 4 entries (or 5 for H19, which also carries the
+// pretable scroll baseline).
+// --------------------------------------------------------------------------
+
+function createInteractionRun({
+  adapterId,
+  scriptName,
+  scenarioId = "S2",
+  timestamp,
+  interaction_latency_ms = 24,
+  settle_duration_ms = 18,
+  result_row_count = 750,
+}) {
+  return {
+    adapterId,
+    profile: "default",
+    scenarioId,
+    scale: "dev",
+    scriptName,
+    browserName: "chromium",
+    browserVersion: "123.0",
+    timestamp,
+    seed: 202,
+    rowCount: 750,
+    viewport: { width: 1440, height: 900 },
+    fontStack: '"IBM Plex Sans", system-ui, sans-serif',
+    deviceScaleFactor: 1,
+    status: "completed",
+    notes: [`interaction mode: ${scriptName}`],
+    tracePath: `status/traces/${adapterId}-${scriptName}.trace.zip`,
+    metrics: {
+      interaction_latency_ms,
+      settle_duration_ms,
+      post_interaction_blank_gap_frames: 0,
+      post_interaction_anchor_shift_px: 0,
+      post_interaction_row_height_error_p95_px: 0,
+      result_row_count,
+      selected_row_preserved: 1,
+      focused_row_preserved: 1,
+      dom_nodes_peak: 400,
+    },
+  };
+}
+
+function createCellRendererScrollRun({
+  adapterId,
+  scriptName,
+  scenarioId = "S2",
+  scale = "hypothesis",
+  timestamp,
+  scroll_frame_p95_ms = 9,
+}) {
+  return {
+    adapterId,
+    profile: "default",
+    scenarioId,
+    scale,
+    scriptName,
+    browserName: "chromium",
+    browserVersion: "123.0",
+    timestamp,
+    seed: 202,
+    viewport: { width: 1440, height: 900 },
+    fontStack: '"IBM Plex Sans", system-ui, sans-serif',
+    deviceScaleFactor: 1,
+    notes: [],
+    status: "completed",
+    tracePath: `status/traces/${adapterId}-${scriptName}.trace.zip`,
+    metrics: { scroll_frame_p95_ms },
+  };
+}
+
+function makeInteractionReport({ scriptName }) {
+  const adapters = ["pretable", "ag-grid", "tanstack", "mui"];
+  return createHypothesisReport({
+    runsetId: "comparator-evidence-test",
+    generatedAt: "2026-05-12T00:00:00.000Z",
+    entries: adapters.map((adapterId) => ({
+      adapterId,
+      repeatIndex: 0,
+      scenarioId: "S2",
+      scriptName,
+      summaryPath: `status/${adapterId}-${scriptName}.summary.json`,
+    })),
+    runs: adapters.map((adapterId, index) =>
+      createInteractionRun({
+        adapterId,
+        scriptName,
+        timestamp: `2026-05-12T00:00:${(index * 10).toString().padStart(2, "0")}.000Z`,
+        result_row_count: scriptName === "sort" ? 750 : 500,
+      }),
+    ),
+  });
+}
+
+test("H6 evidence array includes comparator entries when comparator runs are present", () => {
+  const report = makeInteractionReport({ scriptName: "sort" });
+  const h6 = report.hypotheses.find((h) => h.id === "H6");
+  assert.ok(h6);
+  assert.equal(h6.status, "satisfied");
+  assert.equal(h6.evidence.length, 4);
+  assert.deepEqual(h6.evidence.map((entry) => entry.adapterId).sort(), [
+    "ag-grid",
+    "mui",
+    "pretable",
+    "tanstack",
+  ]);
+});
+
+test("H7 evidence array includes comparator entries when comparator runs are present", () => {
+  const report = makeInteractionReport({ scriptName: "filter-metadata" });
+  const h7 = report.hypotheses.find((h) => h.id === "H7");
+  assert.ok(h7);
+  assert.equal(h7.status, "satisfied");
+  assert.equal(h7.evidence.length, 4);
+  assert.deepEqual(h7.evidence.map((entry) => entry.adapterId).sort(), [
+    "ag-grid",
+    "mui",
+    "pretable",
+    "tanstack",
+  ]);
+});
+
+test("H8 evidence array includes comparator entries when comparator runs are present", () => {
+  const report = makeInteractionReport({ scriptName: "filter-text" });
+  const h8 = report.hypotheses.find((h) => h.id === "H8");
+  assert.ok(h8);
+  assert.equal(h8.status, "satisfied");
+  assert.equal(h8.evidence.length, 4);
+  assert.deepEqual(h8.evidence.map((entry) => entry.adapterId).sort(), [
+    "ag-grid",
+    "mui",
+    "pretable",
+    "tanstack",
+  ]);
+});
+
+test("H19 evidence array includes comparator format entries when comparator runs are present", () => {
+  const runs = [
+    createCellRendererScrollRun({
+      adapterId: "pretable",
+      scriptName: "scroll-with-format",
+      timestamp: "2026-05-12T00:00:00.000Z",
+      scroll_frame_p95_ms: 9,
+    }),
+    createCellRendererScrollRun({
+      adapterId: "pretable",
+      scriptName: "scroll",
+      timestamp: "2026-05-12T00:00:10.000Z",
+      scroll_frame_p95_ms: 8,
+    }),
+    createCellRendererScrollRun({
+      adapterId: "ag-grid",
+      scriptName: "scroll-with-format",
+      timestamp: "2026-05-12T00:00:20.000Z",
+      scroll_frame_p95_ms: 11,
+    }),
+    createCellRendererScrollRun({
+      adapterId: "tanstack",
+      scriptName: "scroll-with-format",
+      timestamp: "2026-05-12T00:00:30.000Z",
+      scroll_frame_p95_ms: 13,
+    }),
+    createCellRendererScrollRun({
+      adapterId: "mui",
+      scriptName: "scroll-with-format",
+      timestamp: "2026-05-12T00:00:40.000Z",
+      scroll_frame_p95_ms: 14,
+    }),
+  ];
+  const result = evaluateH19(runs);
+  assert.equal(result.status, "satisfied");
+  // [pretable format, pretable scroll baseline, ag-grid, tanstack, mui]
+  assert.equal(result.evidence.length, 5);
+  assert.deepEqual(
+    result.evidence
+      .slice(2)
+      .map((entry) => entry.adapterId)
+      .sort(),
+    ["ag-grid", "mui", "tanstack"],
+  );
+});
+
+test("H20 evidence array includes comparator entries when comparator runs are present", () => {
+  const adapters = ["pretable", "ag-grid", "tanstack", "mui"];
+  const runs = adapters.map((adapterId, index) =>
+    createCellRendererScrollRun({
+      adapterId,
+      scriptName: "scroll-with-render",
+      timestamp: `2026-05-12T00:00:${(index * 10).toString().padStart(2, "0")}.000Z`,
+      scroll_frame_p95_ms: 11,
+    }),
+  );
+  const result = evaluateH20(runs);
+  assert.equal(result.status, "satisfied");
+  assert.equal(result.evidence.length, 4);
+  assert.deepEqual(result.evidence.map((entry) => entry.adapterId).sort(), [
+    "ag-grid",
+    "mui",
+    "pretable",
+    "tanstack",
+  ]);
+});
+
+test("H21 evidence array includes comparator entries when comparator runs are present", () => {
+  const adapters = ["pretable", "ag-grid", "tanstack", "mui"];
+  const runs = adapters.map((adapterId, index) =>
+    createCellRendererScrollRun({
+      adapterId,
+      scriptName: "scroll-with-heavy-render",
+      timestamp: `2026-05-12T00:00:${(index * 10).toString().padStart(2, "0")}.000Z`,
+      scroll_frame_p95_ms: 17,
+    }),
+  );
+  const result = evaluateH21(runs);
+  assert.equal(result.status, "satisfied");
+  assert.equal(result.evidence.length, 4);
+  assert.deepEqual(result.evidence.map((entry) => entry.adapterId).sort(), [
+    "ag-grid",
+    "mui",
+    "pretable",
+    "tanstack",
+  ]);
+});
diff --git a/scripts/bench-matrix.mjs b/scripts/bench-matrix.mjs
index 3075b45..1cfc434 100644
--- a/scripts/bench-matrix.mjs
+++ b/scripts/bench-matrix.mjs
@@ -398,6 +398,24 @@ async function writeHypothesisReport(report) {
   return path.relative(process.cwd(), reportPath);
 }
 
+/**
+ * Find comparator-adapter series for the given (scenarioId, scriptName)
+ * slice and return their evidence summaries. Pretable is excluded —
+ * callers are expected to construct pretable evidence separately. Each
+ * returned entry is the same shape as summarizeRunSeriesEvidence's output,
+ * matching the evidence-array contract used by all evaluators.
+ *
+ * Used by H6/H7/H8 (interaction) and H19/H20/H21 (cell-renderer) to
+ * surface comparator metrics alongside pretable in their evidence arrays.
+ * Status verdicts remain pretable-only; this data is informational.
+ */
+function findComparatorEvidence(runs, { scenarioId, scriptName }) {
+  const series = groupRunSeries(runs, { scenarioId, scriptName }).filter(
+    (s) => s[0]?.adapterId && s[0].adapterId !== "pretable",
+  );
+  return series.map((s) => summarizeRunSeriesEvidence(s));
+}
+
 function evaluateH1(runs, scenarioId) {
   const wrappedScrollSeries = findRunSeries(runs, {
     adapterId: "pretable",
@@ -1262,6 +1280,15 @@ export function evaluateH19(runs) {
 
   const formatEvidence = summarizeRunSeriesEvidence(formatSeries);
   const baselineEvidence = summarizeRunSeriesEvidence(baselineSeries);
+  // evidence shape: [pretable format-overhead summary, pretable scroll
+  // baseline summary, ...comparator scroll-with-format absolute summaries].
+  // Pretable's first two entries form the format-overhead delta the H19
+  // status verdict consumes; comparator entries are absolute format p95
+  // for cross-adapter reference, NOT deltas vs their own scroll baselines.
+  const comparatorEvidence = findComparatorEvidence(runs, {
+    scenarioId: "S2",
+    scriptName: "scroll-with-format",
+  });
   const formatP95 = formatEvidence.metrics.scroll_frame_p95_ms;
   const baselineP95 = baselineEvidence.metrics.scroll_frame_p95_ms;
 
@@ -1271,7 +1298,7 @@ export function evaluateH19(runs) {
       status: "insufficient",
       summary:
         "scroll_frame_p95_ms missing from format or baseline run — cannot evaluate.",
-      evidence: [formatEvidence, baselineEvidence],
+      evidence: [formatEvidence, baselineEvidence, ...comparatorEvidence],
     };
   }
 
@@ -1281,7 +1308,7 @@ export function evaluateH19(runs) {
       id: "H19",
       status: "failing",
       summary: `Format overhead is ${overhead.toFixed(2)}ms (threshold: ≤ 2ms; format ${formatP95}ms vs baseline ${baselineP95}ms).`,
-      evidence: [formatEvidence, baselineEvidence],
+      evidence: [formatEvidence, baselineEvidence, ...comparatorEvidence],
     };
   }
 
@@ -1289,7 +1316,7 @@ export function evaluateH19(runs) {
     id: "H19",
     status: "satisfied",
     summary: `Format overhead is ${overhead.toFixed(2)}ms (≤ 2ms; format ${formatP95}ms, baseline ${baselineP95}ms).`,
-    evidence: [formatEvidence, baselineEvidence],
+    evidence: [formatEvidence, baselineEvidence, ...comparatorEvidence],
   };
 }
 
@@ -1315,6 +1342,10 @@ export function evaluateH20(runs) {
   }
 
   const evidence = summarizeRunSeriesEvidence(series);
+  const comparatorEvidence = findComparatorEvidence(runs, {
+    scenarioId: "S2",
+    scriptName: "scroll-with-render",
+  });
   const p95 = evidence.metrics.scroll_frame_p95_ms;
 
   if (p95 === undefined || p95 > 16) {
@@ -1322,7 +1353,7 @@ export function evaluateH20(runs) {
       id: "H20",
       status: "failing",
       summary: `scroll_frame_p95_ms with cheap render is ${p95 ?? "missing"}ms (threshold: ≤ 16ms).`,
-      evidence: [evidence],
+      evidence: [evidence, ...comparatorEvidence],
     };
   }
 
@@ -1330,7 +1361,7 @@ export function evaluateH20(runs) {
     id: "H20",
     status: "satisfied",
     summary: `Cheap render scroll p95 is ${p95}ms (≤ 16ms single-frame budget).`,
-    evidence: [evidence],
+    evidence: [evidence, ...comparatorEvidence],
   };
 }
 
@@ -1356,6 +1387,10 @@ export function evaluateH21(runs) {
   }
 
   const evidence = summarizeRunSeriesEvidence(series);
+  const comparatorEvidence = findComparatorEvidence(runs, {
+    scenarioId: "S2",
+    scriptName: "scroll-with-heavy-render",
+  });
   const p95 = evidence.metrics.scroll_frame_p95_ms;
 
   if (p95 === undefined || p95 > 20) {
@@ -1363,7 +1398,7 @@ export function evaluateH21(runs) {
       id: "H21",
       status: "failing",
       summary: `scroll_frame_p95_ms with heavy render is ${p95 ?? "missing"}ms (threshold: ≤ 20ms).`,
-      evidence: [evidence],
+      evidence: [evidence, ...comparatorEvidence],
     };
   }
 
@@ -1371,7 +1406,7 @@ export function evaluateH21(runs) {
     id: "H21",
     status: "satisfied",
     summary: `Heavy render scroll p95 is ${p95}ms (≤ 20ms; ≤ 25% above single-frame budget).`,
-    evidence: [evidence],
+    evidence: [evidence, ...comparatorEvidence],
   };
 }
 
@@ -1516,6 +1551,13 @@ function evaluateInteractionHypothesis(
   }
 
   const candidateEvidence = summarizeRunSeriesEvidence(candidateSeries);
+  // Surface ALL comparator entries (not just the best one) so the evidence
+  // array carries every measured adapter for cross-reference. H6/H7/H8
+  // status verdicts remain pretable-only — comparator data is informational.
+  const comparatorEvidence = findComparatorEvidence(runs, {
+    scenarioId,
+    scriptName,
+  });
   const latency = candidateEvidence.metricSummary?.interaction_latency_ms;
   const settle = candidateEvidence.metricSummary?.settle_duration_ms;
   const blankGap =
@@ -1546,26 +1588,10 @@ function evaluateInteractionHypothesis(
       status: "insufficient",
       summary:
         "The interaction path is measured, but one or more required latency or stability metrics are still missing.",
-      evidence: [candidateEvidence],
+      evidence: [candidateEvidence, ...comparatorEvidence],
     };
   }
 
-  const competitorSeries = groupRunSeries(runs, {
-    scenarioId,
-    scriptName,
-  }).filter((series) => series[0]?.adapterId !== "pretable");
-  const bestCompetitorSeries =
-    competitorSeries.length > 0
-      ? competitorSeries.reduce((best, current) =>
-          medianMetric(current, "interaction_latency_ms") <
-          medianMetric(best, "interaction_latency_ms")
-            ? current
-            : best,
-        )
-      : null;
-  const bestCompetitorEvidence = bestCompetitorSeries
-    ? summarizeRunSeriesEvidence(bestCompetitorSeries)
-    : null;
   const rowReductionSatisfied = requiresRowReduction
     ? baselineRowCount !== undefined && rowCount.median < baselineRowCount
     : true;
@@ -1609,10 +1635,7 @@ function evaluateInteractionHypothesis(
       : requiresRowReduction && !rowReductionSatisfied
         ? "The interaction is instrumented, but the filter does not materially reduce the row set yet."
         : "The interaction is instrumented, but it still exceeds one or more current latency or stability thresholds.",
-    evidence: [
-      candidateEvidence,
-      ...(bestCompetitorEvidence ? [bestCompetitorEvidence] : []),
-    ],
+    evidence: [candidateEvidence, ...comparatorEvidence],
   };
 }
 
diff --git a/status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json b/status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json
new file mode 100644
index 0000000..b596b37
--- /dev/null
+++ b/status/milestones/2026-05-12-comparator-aware-evaluators.hypotheses.json
@@ -0,0 +1,4031 @@
+{
+  "runsetId": "2026-05-12-comparator-aware-evaluators",
+  "generatedAt": "2026-05-13T00:53:04.344Z",
+  "adapters": [
+    {
+      "adapterId": "ag-grid",
+      "adapterFamily": "full-grid"
+    },
+    {
+      "adapterId": "mui",
+      "adapterFamily": "full-grid"
+    },
+    {
+      "adapterId": "pretable",
+      "adapterFamily": "candidate"
+    },
+    {
+      "adapterId": "tanstack",
+      "adapterFamily": "virtualization-primitive"
+    }
+  ],
+  "matrix": {
+    "adapters": ["ag-grid", "mui", "pretable", "tanstack"],
+    "scenarios": ["S2"],
+    "scripts": [
+      "filter-metadata",
+      "filter-text",
+      "scroll",
+      "scroll-with-format",
+      "scroll-with-heavy-render",
+      "scroll-with-render",
+      "sort"
+    ],
+    "repeats": 7
+  },
+  "slices": [
+    {
+      "scenarioId": "S2",
+      "scriptName": "filter-metadata",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "interaction mode: filter-metadata"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "interaction mode: filter-metadata",
+          "internal telemetry rendered rows: 7",
+          "internal telemetry visible rows: 3",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 103395",
+          "internal telemetry viewport range: 0-3",
+          "internal telemetry selected row: S2-row-1502",
+          "internal telemetry focused row: S2-row-1502"
+        ],
+        "varying": {}
+      }
+    },
+    {
+      "scenarioId": "S2",
+      "scriptName": "filter-text",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "interaction mode: filter-text"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "interaction mode: filter-text",
+          "internal telemetry rendered rows: 6",
+          "internal telemetry visible rows: 2",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 86896",
+          "internal telemetry viewport range: 0-2",
+          "internal telemetry selected row: S2-row-1501",
+          "internal telemetry focused row: S2-row-1501"
+        ],
+        "varying": {}
+      }
+    },
+    {
+      "scenarioId": "S2",
+      "scriptName": "scroll",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "internal telemetry rendered rows: 6",
+          "internal telemetry visible rows: 2",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 515700",
+          "internal telemetry viewport range: 0-2",
+          "internal telemetry selected row: none",
+          "internal telemetry focused row: none"
+        ],
+        "varying": {}
+      }
+    },
+    {
+      "scenarioId": "S2",
+      "scriptName": "scroll-with-format",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "internal telemetry rendered rows: 6",
+          "internal telemetry visible rows: 2",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 515700",
+          "internal telemetry viewport range: 0-2",
+          "internal telemetry selected row: none",
+          "internal telemetry focused row: none"
+        ],
+        "varying": {}
+      }
+    },
+    {
+      "scenarioId": "S2",
+      "scriptName": "scroll-with-heavy-render",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "internal telemetry rendered rows: 6",
+          "internal telemetry visible rows: 2",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 515700",
+          "internal telemetry viewport range: 0-2",
+          "internal telemetry selected row: none",
+          "internal telemetry focused row: none"
+        ],
+        "varying": {}
+      }
+    },
+    {
+      "scenarioId": "S2",
+      "scriptName": "scroll-with-render",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "internal telemetry rendered rows: 6",
+          "internal telemetry visible rows: 2",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 515700",
+          "internal telemetry viewport range: 0-2",
+          "internal telemetry selected row: none",
+          "internal telemetry focused row: none"
+        ],
+        "varying": {}
+      }
+    },
+    {
+      "scenarioId": "S2",
+      "scriptName": "sort",
+      "adapterIds": ["ag-grid", "mui", "pretable", "tanstack"],
+      "policyNotes": {
+        "common": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "interaction mode: sort"
+        ],
+        "union": [
+          "contain: none",
+          "content visibility: visible",
+          "contain intrinsic size: none",
+          "scroll anchoring: none",
+          "overscroll behavior: contain",
+          "interaction mode: sort",
+          "internal telemetry rendered rows: 7",
+          "internal telemetry visible rows: 3",
+          "internal telemetry total rows: 3000",
+          "internal telemetry planned height: 515693",
+          "internal telemetry viewport range: 0-3",
+          "internal telemetry selected row: S2-row-1775",
+          "internal telemetry focused row: S2-row-1775"
+        ],
+        "varying": {}
+      }
+    }
+  ],
+  "hypotheses": [
+    {
+      "id": "H1",
+      "status": "satisfied",
+      "summary": "Wrapped-text scrolling delivers zero-artifact quality (row height error ≤ 1px, anchor shift ≤ 16px, no blank gaps, no long tasks) with frame times within 10% of the best measured full-grid comparator. No measured full-grid competitor achieves the same combined quality. Evidence is based on current repeated-run medians.",
+      "evidence": [
+        {
+          "adapterId": "pretable",
+          "adapterFamily": "candidate",
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "status": "completed",
+          "sampleCount": 7,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "internal telemetry rendered rows: 6",
+              "internal telemetry visible rows: 2",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515700",
+              "internal telemetry viewport range: 0-2",
+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "internal telemetry rendered rows: 6",
+              "internal telemetry visible rows: 2",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515700",
+              "internal telemetry viewport range: 0-2",
+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 10.199999999999989,
+            "blank_gap_frames": 0,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 98,
+            "scroll_viewport_nodes_peak": 93,
+            "rendered_rows_peak": 11,
+            "rendered_cells_peak": 66,
+            "row_height_error_p95_px": 1,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 10.099999999999966,
+              "median": 10.199999999999989,
+              "max": 10.300000000000011
+            },
+            "blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 98,
+              "median": 98,
+              "max": 98
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 93,
+              "median": 93,
+              "max": 93
+            },
+            "rendered_rows_peak": {
+              "min": 11,
+              "median": 11,
+              "max": 11
+            },
+            "rendered_cells_peak": {
+              "min": 66,
+              "median": 66,
+              "max": 66
+            },
+            "row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "mui",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "status": "completed",
+          "sampleCount": 3,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 10.300000000000068,
+            "blank_gap_frames": 0,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 251,
+            "scroll_viewport_nodes_peak": 239,
+            "rendered_rows_peak": 22,
+            "rendered_cells_peak": 115,
+            "row_height_error_p95_px": 1,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 10.300000000000011,
+              "median": 10.300000000000068,
+              "max": 16.69999999999999
+            },
+            "blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 251,
+              "median": 251,
+              "max": 251
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 239,
+              "median": 239,
+              "max": 239
+            },
+            "rendered_rows_peak": {
+              "min": 22,
+              "median": 22,
+              "max": 22
+            },
+            "rendered_cells_peak": {
+              "min": 115,
+              "median": 115,
+              "max": 115
+            },
+            "row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "tanstack",
+          "adapterFamily": "virtualization-primitive",
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "status": "completed",
+          "sampleCount": 6,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 16.700000000000045,
+            "blank_gap_frames": 1,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 704,
+            "scroll_viewport_nodes_peak": 700,
+            "rendered_rows_peak": 16,
+            "rendered_cells_peak": 640,
+            "row_height_error_p95_px": 0,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 16.699999999999932,
+              "median": 16.700000000000045,
+              "max": 16.700000000000045
+            },
+            "blank_gap_frames": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 704,
+              "median": 704,
+              "max": 704
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 700,
+              "median": 700,
+              "max": 700
+            },
+            "rendered_rows_peak": {
+              "min": 16,
+              "median": 16,
+              "max": 16
+            },
+            "rendered_cells_peak": {
+              "min": 640,
+              "median": 640,
+              "max": 640
+            },
+            "row_height_error_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        }
+      ]
+    },
+    {
+      "id": "H6",
+      "status": "satisfied",
+      "summary": "Wrapped-text local sorting stays within the current interaction and settle thresholds while preserving post-sort stability. Evidence is based on current repeated-run medians.",
+      "evidence": [
+        {
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+          "adapterFamily": "candidate",
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "status": "completed",
+          "sampleCount": 7,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort",
+              "internal telemetry rendered rows: 7",
+              "internal telemetry visible rows: 3",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515693",
+              "internal telemetry viewport range: 0-3",
+              "internal telemetry selected row: S2-row-1775",
+              "internal telemetry focused row: S2-row-1775"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort",
+              "internal telemetry rendered rows: 7",
+              "internal telemetry visible rows: 3",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515693",
+              "internal telemetry viewport range: 0-3",
+              "internal telemetry selected row: S2-row-1775",
+              "internal telemetry focused row: S2-row-1775"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "interaction_latency_ms": 16.69999999999999,
+            "settle_duration_ms": 16.69999999999999,
+            "post_interaction_blank_gap_frames": 0,
+            "post_interaction_anchor_shift_px": 0,
+            "post_interaction_row_height_error_p95_px": 1,
+            "result_row_count": 3000,
+            "selected_row_preserved": 1,
+            "focused_row_preserved": 1,
+            "dom_nodes_peak": 70,
+            "rendered_rows_peak": 7,
+            "rendered_cells_peak": 42
+          },
+          "metricSummary": {
+            "interaction_latency_ms": {
+              "min": 16.49999999999997,
+              "median": 16.69999999999999,
+              "max": 18.5
+            },
+            "settle_duration_ms": {
+              "min": 15.099999999999966,
+              "median": 16.69999999999999,
+              "max": 17.100000000000023
+            },
+            "post_interaction_blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "result_row_count": {
+              "min": 3000,
+              "median": 3000,
+              "max": 3000
+            },
+            "selected_row_preserved": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "focused_row_preserved": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "dom_nodes_peak": {
+              "min": 70,
+              "median": 70,
+              "max": 70
+            },
+            "rendered_rows_peak": {
+              "min": 7,
+              "median": 7,
+              "max": 7
+            },
+            "rendered_cells_peak": {
+              "min": 42,
+              "median": 42,
+              "max": 42
+            }
+          }
+        },
+        {
+          "adapterId": "ag-grid",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "status": "completed",
+          "sampleCount": 6,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "interaction_latency_ms": 50,
+            "settle_duration_ms": 8.399999999999977,
+            "post_interaction_blank_gap_frames": 0,
+            "post_interaction_anchor_shift_px": 0,
+            "post_interaction_row_height_error_p95_px": 2,
+            "result_row_count": 3000,
+            "selected_row_preserved": 0,
+            "focused_row_preserved": 0,
+            "dom_nodes_peak": 335,
+            "rendered_rows_peak": 16,
+            "rendered_cells_peak": 96
+          },
+          "metricSummary": {
+            "interaction_latency_ms": {
+              "min": 41.599999999999994,
+              "median": 50,
+              "max": 50.19999999999999
+            },
+            "settle_duration_ms": {
+              "min": 8.199999999999989,
+              "median": 8.399999999999977,
+              "max": 16.5
+            },
+            "post_interaction_blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_row_height_error_p95_px": {
+              "min": 2,
+              "median": 2,
+              "max": 2
+            },
+            "result_row_count": {
+              "min": 3000,
+              "median": 3000,
+              "max": 3000
+            },
+            "selected_row_preserved": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "focused_row_preserved": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 335,
+              "median": 335,
+              "max": 335
+            },
+            "rendered_rows_peak": {
+              "min": 16,
+              "median": 16,
+              "max": 16
+            },
+            "rendered_cells_peak": {
+              "min": 96,
+              "median": 96,
+              "max": 96
+            }
+          }
+        },
+        {
+          "adapterId": "mui",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "status": "completed",
+          "sampleCount": 3,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "interaction_latency_ms": 25,
+            "settle_duration_ms": 24.900000000000034,
+            "post_interaction_blank_gap_frames": 0,
+            "post_interaction_anchor_shift_px": 0,
+            "post_interaction_row_height_error_p95_px": 1,
+            "result_row_count": 3000,
+            "selected_row_preserved": 0,
+            "focused_row_preserved": 0,
+            "dom_nodes_peak": 220,
+            "rendered_rows_peak": 10,
+            "rendered_cells_peak": 70
+          },
+          "metricSummary": {
+            "interaction_latency_ms": {
+              "min": 24.5,
+              "median": 25,
+              "max": 42.39999999999998
+            },
+            "settle_duration_ms": {
+              "min": 24.80000000000001,
+              "median": 24.900000000000034,
+              "max": 25.19999999999999
+            },
+            "post_interaction_blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "result_row_count": {
+              "min": 3000,
+              "median": 3000,
+              "max": 3000
+            },
+            "selected_row_preserved": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "focused_row_preserved": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 220,
+              "median": 220,
+              "max": 220
+            },
+            "rendered_rows_peak": {
+              "min": 10,
+              "median": 10,
+              "max": 10
+            },
+            "rendered_cells_peak": {
+              "min": 70,
+              "median": 70,
+              "max": 70
+            }
+          }
+        },
+        {
+          "adapterId": "tanstack",
+          "adapterFamily": "virtualization-primitive",
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "status": "completed",
+          "sampleCount": 5,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: sort"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "interaction_latency_ms": 10.099999999999994,
+            "settle_duration_ms": 26.200000000000045,
+            "post_interaction_blank_gap_frames": 3,
+            "post_interaction_anchor_shift_px": 0,
+            "post_interaction_row_height_error_p95_px": 0,
+            "result_row_count": 3000,
+            "selected_row_preserved": 0,
+            "focused_row_preserved": 0,
+            "dom_nodes_peak": 499,
+            "rendered_rows_peak": 11,
+            "rendered_cells_peak": 440
+          },
+          "metricSummary": {
+            "interaction_latency_ms": {
+              "min": 6.399999999999977,
+              "median": 10.099999999999994,
+              "max": 41.89999999999998
+            },
+            "settle_duration_ms": {
+              "min": 23.100000000000023,
+              "median": 26.200000000000045,
+              "max": 33.39999999999998
+            },
+            "post_interaction_blank_gap_frames": {
+              "min": 3,
+              "median": 3,
+              "max": 3
+            },
+            "post_interaction_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "post_interaction_row_height_error_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "result_row_count": {
+              "min": 3000,
+              "median": 3000,
+              "max": 3000
+            },
+            "selected_row_preserved": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "focused_row_preserved": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 499,
+              "median": 499,
+              "max": 499
+            },
+            "rendered_rows_peak": {
+              "min": 11,
+              "median": 11,
+              "max": 11
+            },
+            "rendered_cells_peak": {
+              "min": 440,
+              "median": 440,
+              "max": 440
+            }
+          }
+        }
+      ]
+    },
+    {
+      "id": "H7",
+      "status": "satisfied",
+      "summary": "Metadata filtering stays within the current interaction and settle thresholds while reducing the row set without post-filter instability. Evidence is based on current repeated-run medians.",
+      "evidence": [
+        {
+          "adapterId": "pretable",
+          "adapterFamily": "candidate",
+          "scenarioId": "S2",
+          "scriptName": "filter-metadata",
+          "status": "completed",
+          "sampleCount": 6,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "interaction mode: filter-metadata",
+              "internal telemetry rendered rows: 7",
+              "internal telemetry visible rows: 3",
+              "internal telemetry total rows: 3000",
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+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-format-2026-05-13t00-49-55-730z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-47-20-046z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-47-33-599z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-47-47-476z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 3,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-49-31-827z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 4,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-49-46-095z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 5,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-49-59-931z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-render-2026-05-13t00-47-17-994z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-render-2026-05-13t00-47-31-495z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-render-2026-05-13t00-47-45-377z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 3,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-render-2026-05-13t00-49-29-654z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
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+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-render-2026-05-13t00-49-43-990z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 5,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-scroll-with-render-2026-05-13t00-49-57-823z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
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+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-47-10-664z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
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+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-47-24-158z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
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+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-47-37-849z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "repeatIndex": 3,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-48-41-501z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "repeatIndex": 4,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-49-22-232z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
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+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-49-36-106z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "repeatIndex": 6,
+          "summaryPath": "status/chromium-pretable-default-s2-hypothesis-sort-2026-05-13t00-49-50-367z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "filter-metadata",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-filter-metadata-2026-05-13t00-51-18-892z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "filter-metadata",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-filter-metadata-2026-05-13t00-51-33-848z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "filter-metadata",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-filter-metadata-2026-05-13t00-51-48-589z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "filter-text",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-filter-text-2026-05-13t00-51-20-715z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "filter-text",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-filter-text-2026-05-13t00-51-35-662z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "filter-text",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-filter-text-2026-05-13t00-51-50-419z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-2026-05-13t00-48-33-632z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-2026-05-13t00-49-42-275z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll",
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+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-2026-05-13t00-50-56-654z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "repeatIndex": 3,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-2026-05-13t00-51-14-956z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "repeatIndex": 4,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-2026-05-13t00-51-29-737z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll",
+          "repeatIndex": 5,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-2026-05-13t00-51-44-453z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-format",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-format-2026-05-13t00-51-22-515z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-format",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-format-2026-05-13t00-51-37-475z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-format",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-format-2026-05-13t00-51-52-309z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-51-27-192z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-51-42-031z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-heavy-render-2026-05-13t00-51-56-785z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-render-2026-05-13t00-51-24-727z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-render-2026-05-13t00-51-39-693z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-scroll-with-render-2026-05-13t00-51-54-521z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "repeatIndex": 0,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-sort-2026-05-13t00-48-35-885z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "repeatIndex": 1,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-sort-2026-05-13t00-50-58-779z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
+          "scriptName": "sort",
+          "repeatIndex": 2,
+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-sort-2026-05-13t00-51-17-111z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
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+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-sort-2026-05-13t00-51-31-999z.summary.json"
+        },
+        {
+          "scenarioId": "S2",
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+          "summaryPath": "status/chromium-tanstack-default-s2-hypothesis-sort-2026-05-13t00-51-46-701z.summary.json"
+        }
+      ]
+    },
+    {
+      "id": "H9",
+      "status": "insufficient",
+      "summary": "Missing a completed S7 scroll run, so composite scroll quality cannot be evaluated yet.",
+      "evidence": []
+    },
+    {
+      "id": "H10",
+      "status": "insufficient",
+      "summary": "Missing a completed S7 sort run, so local sort interaction proof is not available yet.",
+      "evidence": []
+    },
+    {
+      "id": "H11",
+      "status": "insufficient",
+      "summary": "Missing a completed S7 metadata-filter run, so metadata filter proof is not available yet.",
+      "evidence": []
+    },
+    {
+      "id": "H12",
+      "status": "insufficient",
+      "summary": "Missing a completed S7 text-filter run, so wrapped-text filter proof is not available yet.",
+      "evidence": []
+    },
+    {
+      "id": "H13",
+      "status": "insufficient",
+      "summary": "Missing a completed S5 updates run, so streaming update frame budget proof is not available yet.",
+      "evidence": []
+    },
+    {
+      "id": "H14",
+      "status": "insufficient",
+      "summary": "Missing rate-tagged S5 updates runs for pretable, so the streaming operating envelope cannot be evaluated yet.",
+      "evidence": []
+    },
+    {
+      "id": "H15",
+      "status": "insufficient",
+      "summary": "Missing rate-tagged S5 updates runs for pretable, so streaming row stability cannot be evaluated yet.",
+      "evidence": []
+    },
+    {
+      "id": "H16",
+      "status": "insufficient",
+      "summary": "No completed S2/hypothesis pretable select-range-extend runs available.",
+      "evidence": []
+    },
+    {
+      "id": "H17",
+      "status": "insufficient",
+      "summary": "No completed S2/hypothesis pretable keyboard-nav-row runs available.",
+      "evidence": []
+    },
+    {
+      "id": "H18",
+      "status": "insufficient",
+      "summary": "No completed S2/hypothesis pretable select-all runs available.",
+      "evidence": []
+    },
+    {
+      "id": "H19",
+      "status": "satisfied",
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+              "internal telemetry total rows: 3000",
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+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
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+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
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+          "metricSummary": {
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+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 412,
+              "median": 412,
+              "max": 412
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 195,
+              "median": 195,
+              "max": 195
+            },
+            "rendered_rows_peak": {
+              "min": 27,
+              "median": 27,
+              "max": 27
+            },
+            "rendered_cells_peak": {
+              "min": 162,
+              "median": 162,
+              "max": 162
+            },
+            "row_height_error_p95_px": {
+              "min": 2,
+              "median": 2,
+              "max": 2
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "mui",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-format",
+          "status": "completed",
+          "sampleCount": 3,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 10.300000000000011,
+            "blank_gap_frames": 0,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 251,
+            "scroll_viewport_nodes_peak": 239,
+            "rendered_rows_peak": 22,
+            "rendered_cells_peak": 115,
+            "row_height_error_p95_px": 1,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 10,
+              "median": 10.300000000000011,
+              "max": 10.399999999999977
+            },
+            "blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 251,
+              "median": 251,
+              "max": 251
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 239,
+              "median": 239,
+              "max": 239
+            },
+            "rendered_rows_peak": {
+              "min": 22,
+              "median": 22,
+              "max": 22
+            },
+            "rendered_cells_peak": {
+              "min": 115,
+              "median": 115,
+              "max": 115
+            },
+            "row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "tanstack",
+          "adapterFamily": "virtualization-primitive",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-format",
+          "status": "completed",
+          "sampleCount": 3,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 16.799999999999955,
+            "blank_gap_frames": 1,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 704,
+            "scroll_viewport_nodes_peak": 700,
+            "rendered_rows_peak": 16,
+            "rendered_cells_peak": 640,
+            "row_height_error_p95_px": 0,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 16.700000000000045,
+              "median": 16.799999999999955,
+              "max": 17
+            },
+            "blank_gap_frames": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 704,
+              "median": 704,
+              "max": 704
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 700,
+              "median": 700,
+              "max": 700
+            },
+            "rendered_rows_peak": {
+              "min": 16,
+              "median": 16,
+              "max": 16
+            },
+            "rendered_cells_peak": {
+              "min": 640,
+              "median": 640,
+              "max": 640
+            },
+            "row_height_error_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        }
+      ]
+    },
+    {
+      "id": "H20",
+      "status": "satisfied",
+      "summary": "Cheap render scroll p95 is 10.300000000000011ms (≤ 16ms single-frame budget).",
+      "evidence": [
+        {
+          "adapterId": "pretable",
+          "adapterFamily": "candidate",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "status": "completed",
+          "sampleCount": 6,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "internal telemetry rendered rows: 6",
+              "internal telemetry visible rows: 2",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515700",
+              "internal telemetry viewport range: 0-2",
+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "internal telemetry rendered rows: 6",
+              "internal telemetry visible rows: 2",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515700",
+              "internal telemetry viewport range: 0-2",
+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 10.300000000000011,
+            "blank_gap_frames": 0,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 164,
+            "scroll_viewport_nodes_peak": 159,
+            "rendered_rows_peak": 11,
+            "rendered_cells_peak": 66,
+            "row_height_error_p95_px": 1,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 9.699999999999932,
+              "median": 10.300000000000011,
+              "max": 10.300000000000011
+            },
+            "blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 164,
+              "median": 164,
+              "max": 164
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 159,
+              "median": 159,
+              "max": 159
+            },
+            "rendered_rows_peak": {
+              "min": 11,
+              "median": 11,
+              "max": 11
+            },
+            "rendered_cells_peak": {
+              "min": 66,
+              "median": 66,
+              "max": 66
+            },
+            "row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "ag-grid",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "status": "completed",
+          "sampleCount": 5,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 24.600000000000023,
+            "blank_gap_frames": 1,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 412,
+            "scroll_viewport_nodes_peak": 195,
+            "rendered_rows_peak": 27,
+            "rendered_cells_peak": 162,
+            "row_height_error_p95_px": 2,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 18.400000000000034,
+              "median": 24.600000000000023,
+              "max": 25
+            },
+            "blank_gap_frames": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 412,
+              "median": 412,
+              "max": 412
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 195,
+              "median": 195,
+              "max": 195
+            },
+            "rendered_rows_peak": {
+              "min": 27,
+              "median": 27,
+              "max": 27
+            },
+            "rendered_cells_peak": {
+              "min": 162,
+              "median": 162,
+              "max": 162
+            },
+            "row_height_error_p95_px": {
+              "min": 2,
+              "median": 2,
+              "max": 2
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "mui",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "status": "completed",
+          "sampleCount": 3,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 10.300000000000011,
+            "blank_gap_frames": 0,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 345,
+            "scroll_viewport_nodes_peak": 333,
+            "rendered_rows_peak": 22,
+            "rendered_cells_peak": 115,
+            "row_height_error_p95_px": 1,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 10.199999999999989,
+              "median": 10.300000000000011,
+              "max": 16.80000000000001
+            },
+            "blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 345,
+              "median": 345,
+              "max": 345
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 333,
+              "median": 333,
+              "max": 333
+            },
+            "rendered_rows_peak": {
+              "min": 22,
+              "median": 22,
+              "max": 22
+            },
+            "rendered_cells_peak": {
+              "min": 115,
+              "median": 115,
+              "max": 115
+            },
+            "row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "tanstack",
+          "adapterFamily": "virtualization-primitive",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-render",
+          "status": "completed",
+          "sampleCount": 3,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 17.599999999999966,
+            "blank_gap_frames": 1,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 1344,
+            "scroll_viewport_nodes_peak": 1340,
+            "rendered_rows_peak": 16,
+            "rendered_cells_peak": 640,
+            "row_height_error_p95_px": 0,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 17.5,
+              "median": 17.599999999999966,
+              "max": 17.699999999999932
+            },
+            "blank_gap_frames": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 1344,
+              "median": 1344,
+              "max": 1344
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 1340,
+              "median": 1340,
+              "max": 1340
+            },
+            "rendered_rows_peak": {
+              "min": 16,
+              "median": 16,
+              "max": 16
+            },
+            "rendered_cells_peak": {
+              "min": 640,
+              "median": 640,
+              "max": 640
+            },
+            "row_height_error_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        }
+      ]
+    },
+    {
+      "id": "H21",
+      "status": "satisfied",
+      "summary": "Heavy render scroll p95 is 10.300000000000011ms (≤ 20ms; ≤ 25% above single-frame budget).",
+      "evidence": [
+        {
+          "adapterId": "pretable",
+          "adapterFamily": "candidate",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "status": "completed",
+          "sampleCount": 6,
+          "policyNotes": {
+            "common": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "internal telemetry rendered rows: 6",
+              "internal telemetry visible rows: 2",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515700",
+              "internal telemetry viewport range: 0-2",
+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
+            ],
+            "union": [
+              "contain: none",
+              "content visibility: visible",
+              "contain intrinsic size: none",
+              "scroll anchoring: none",
+              "overscroll behavior: contain",
+              "internal telemetry rendered rows: 6",
+              "internal telemetry visible rows: 2",
+              "internal telemetry total rows: 3000",
+              "internal telemetry planned height: 515700",
+              "internal telemetry viewport range: 0-2",
+              "internal telemetry selected row: none",
+              "internal telemetry focused row: none"
+            ],
+            "varying": {}
+          },
+          "metrics": {
+            "scroll_frame_p95_ms": 10.300000000000011,
+            "blank_gap_frames": 0,
+            "long_tasks_count": 0,
+            "long_tasks_ms": 0,
+            "dom_nodes_peak": 296,
+            "scroll_viewport_nodes_peak": 291,
+            "rendered_rows_peak": 11,
+            "rendered_cells_peak": 66,
+            "row_height_error_p95_px": 1,
+            "scroll_anchor_shift_px": 0,
+            "scroll_anchor_shift_forward_p95_px": 0,
+            "scroll_anchor_shift_backward_p95_px": 0
+          },
+          "metricSummary": {
+            "scroll_frame_p95_ms": {
+              "min": 10.299999999999955,
+              "median": 10.300000000000011,
+              "max": 10.300000000000068
+            },
+            "blank_gap_frames": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_count": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "long_tasks_ms": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "dom_nodes_peak": {
+              "min": 296,
+              "median": 296,
+              "max": 296
+            },
+            "scroll_viewport_nodes_peak": {
+              "min": 291,
+              "median": 291,
+              "max": 291
+            },
+            "rendered_rows_peak": {
+              "min": 11,
+              "median": 11,
+              "max": 11
+            },
+            "rendered_cells_peak": {
+              "min": 66,
+              "median": 66,
+              "max": 66
+            },
+            "row_height_error_p95_px": {
+              "min": 1,
+              "median": 1,
+              "max": 1
+            },
+            "scroll_anchor_shift_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_forward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            },
+            "scroll_anchor_shift_backward_p95_px": {
+              "min": 0,
+              "median": 0,
+              "max": 0
+            }
+          }
+        },
+        {
+          "adapterId": "ag-grid",
+          "adapterFamily": "full-grid",
+          "scenarioId": "S2",
+          "scriptName": "scroll-with-heavy-render",
+          "status": "completed",
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+              "scroll anchoring: none",
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+        {
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+              "content visibility: visible",
+              "contain intrinsic size: none",
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+            "varying": {}
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+      ]
+    },
+    {
+      "id": "H22",
+      "status": "insufficient",
+      "summary": "No completed pretable S2 autosize runs available.",
+      "evidence": []
+    }
+  ]
+}