diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 19440b0..d8e5e7d 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -7,7 +7,7 @@ on:
   push:
     branches: [main]
   pull_request:
-    branches: ['**']
+    branches: ["**"]
   # Allow manually re-running the check from the Actions tab.
   workflow_dispatch:
 
@@ -28,7 +28,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: ['24.14']
+        node-version: ["24.14"]
 
     steps:
       # persist-credentials: false keeps the GITHUB_TOKEN out of .git/config, so a
diff --git a/CLAUDE.md b/CLAUDE.md
index 46c2c85..e1005e9 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -23,19 +23,21 @@ IMPORTANT for AI agents: Do NOT run `gro dev` - the developer will manage the de
 
 - Svelte 5 - component framework with runes
 - SvelteKit - application framework with static adapter
-- fuz_css (`@fuzdev/fuz_css`) - CSS framework and design system
+- fuz_css (`@fuzdev/fuz_css`) - semantic-first CSS framework and design system
 - fuz_ui (`@fuzdev/fuz_ui`) - UI components, theming, docs system
 - fuz_util (`@fuzdev/fuz_util`) - utility functions
 - fuz_code (`@fuzdev/fuz_code`) - syntax highlighting
 - Gro (`@fuzdev/gro`) - build system and task runner
-- prettier + prettier-plugin-svelte - code formatting
+- tsv (via Gro) - code formatting
 - mdz (`@fuzdev/mdz`) - markdown preprocessor wired into `svelte.config.js`
 - `@fuzdev/tsv_wasm` - tsv's formatter + parser as WASM; powers the playground, loaded lazily in the browser
 
-Note: `@fuzdev/tsv_wasm` is loaded only on `/docs/playground` via a browser-only dynamic `import()`, so the ~900KB WASM never weighs down `/docs` or the prerendered pages.
+Note: `@fuzdev/tsv_wasm` is loaded only on `/docs/playground` via a browser-only dynamic `import()`, so the ~900KB-gzipped WASM (~2.9MB decoded) never weighs down `/docs` or the prerendered pages.
 
 Note: several devDependencies — `@webref/css` (CSS spec data), `zimmerframe` (AST traversal), `@sveltejs/acorn-typescript`, `zod`, and `@fuzdev/blake3_wasm` — are *optional peer dependencies* of `@fuzdev/fuz_css`'s `vite_plugin_fuz_css`, declared here so its build-time CSS generation resolves them (e.g. `css_literal.ts` imports `@webref/css`, `css_class_extractor.ts` walks ASTs with `zimmerframe`). They aren't imported by this app's own source, so don't mistake them for dead deps.
 
+Note: `vite` is deliberately held at 7.x (with `@sveltejs/vite-plugin-svelte` 6.x) — vite 8 + plugin-svelte 7 was buggy with this app or SvelteKit's integration. Don't upgrade to vite 8 without deliberately re-verifying the site works.
+
 ## Scope
 
 tsv.fuz.dev is the public face of the tsv tool:
@@ -56,8 +58,6 @@ tsv.fuz.dev is the public face of the tsv tool:
 
 ```
 src/
-├── lib/
-│   └── sample.ts             # placeholder constant (not yet wired up)
 ├── routes/
 │   ├── +page.svelte          # Home: hero, links to docs and benchmarks
 │   ├── +layout.svelte        # Root layout: fuz_css/fuz_code CSS, ThemeRoot, SiteState
@@ -81,23 +81,33 @@ src/
 Benchmark data comes from `tsv`. Full workflow to update:
 
 ```bash
-# 1. In ~/dev/tsv — run benchmarks (builds ffi + wasm automatically)
+# 1. In ~/dev/tsv — run benchmarks across deno/node/bun (builds artifacts automatically)
 deno task bench
 
-# 2. In ~/dev/tsv.fuz.dev — copy the latest result
+# 2. In ~/dev/tsv.fuz.dev — copy the latest results
 npm run update-benchmarks
 ```
 
-Step 1 writes `benches/deno/results/report.json` (committed to tsv).
-Step 2 copies it to `src/routes/docs/benchmarks/benchmarks.json`.
-The JSON format matches `BenchmarkBaseline` in `benchmark_data.ts`.
+Step 1 writes the per-runtime `benches/js/results/report.<runtime>.{json,md}`
+siblings, the composed cross-runtime `report.{json,md}`, and the conformance
+coverage report `report.conformance.node.json` (committed to tsv).
+Step 2 copies three of them — `report.node.json` → `benchmarks.json`, the
+composed `report.json` → `benchmarks_cross_runtime.json`, and
+`report.conformance.node.json` → `benchmarks_conformance.json` — then runs
+`gro format` over the copies. Note the script's source paths are hardcoded to
+`../tsv` — if the reports were generated in a different worktree, copy them
+into `~/dev/tsv` (or copy manually) first.
+The JSON formats match the types in `benchmark_data.ts`.
 
 Key files in `src/routes/docs/benchmarks/`:
 
-- `benchmarks.json` — raw benchmark data (copied from tsv)
+- `benchmarks.json` — per-runtime Node report (copied from tsv)
+- `benchmarks_cross_runtime.json` — composed cross-runtime report (copied from tsv)
+- `benchmarks_conformance.json` — conformance parse-coverage report (copied from tsv)
 - `benchmark_data.ts` — TypeScript types matching the JSON format
-- `benchmarks.ts` — re-exports the JSON with types
+- `benchmarks.ts`, `benchmarks_cross_runtime.ts`, `benchmarks_conformance.ts` — re-export the JSON with types
 - `BenchmarksBar.svelte`, `BenchmarksGroup.svelte`, etc. — visualization components
+- `BenchmarksBaselineGroup.svelte` — shared interactive column behind the format, parse, and binary-size groups: hovering a row re-baselines that group's ratios (each of the three groups per section is independent), restoring the default anchor (the canonical reference — Prettier for format, the JS baseline for parse — and the smallest build for size) on mouseleave. `benchmark_data.ts`'s `compute_baseline_ratio`/`format_baseline_ratio`/`baseline_ratio_color` carry the per-`BaselineDirection` (`speed`/`size`) formulas it and the derivations share
 
 ## Architecture
 
@@ -117,7 +127,7 @@ Deploys to `https://tsv.fuz.dev/` via `gro deploy` (builds and pushes to deploy
 
 - TypeScript strict mode
 - Svelte 5 with runes API
-- Prettier with tabs, 100 char width
+- tsv with tabs, 100 char width
 - Node >= 24.14
 - Private package (not published to npm)
 
diff --git a/package-lock.json b/package-lock.json
index ee9152a..f1da569 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,31 +14,28 @@
         "@fuzdev/fuz_css": "^0.63.2",
         "@fuzdev/fuz_ui": "^0.206.5",
         "@fuzdev/fuz_util": "^0.65.2",
-        "@fuzdev/gro": "^0.205.1",
+        "@fuzdev/gro": "^0.206.0",
         "@fuzdev/mdz": "^0.2.0",
         "@fuzdev/tsv_wasm": "^0.1.0",
         "@ryanatkn/eslint-config": "^0.12.1",
         "@sveltejs/acorn-typescript": "^1.0.9",
         "@sveltejs/adapter-static": "^3.0.10",
-        "@sveltejs/kit": "^2.61.1",
-        "@sveltejs/vite-plugin-svelte": "^7.1.2",
+        "@sveltejs/kit": "^2.69.1",
+        "@sveltejs/vite-plugin-svelte": "^6.2.4",
         "@types/estree": "^1.0.8",
         "@types/node": "^24.12.4",
         "@webref/css": "^8.2.0",
         "eslint": "^9.39.1",
         "eslint-plugin-svelte": "^3.13.1",
         "esm-env": "^1.2.2",
-        "magic-string": "^0.30.21",
-        "prettier": "^3.7.4",
-        "prettier-plugin-svelte": "^3.4.1",
-        "svelte": "^5.56.0",
-        "svelte-check": "^4.3.6",
+        "svelte": "^5.56.4",
+        "svelte-check": "^4.7.2",
         "svelte-docinfo": "^0.5.4",
         "svelte2tsx": "^0.7.47",
         "tslib": "^2.8.1",
         "typescript": "^5.9.3",
         "typescript-eslint": "^8.48.1",
-        "vite": "^8.0.16",
+        "vite": "^7.3.6",
         "vitest": "^4.1.9",
         "zimmerframe": "^1.1.4",
         "zod": "^4.3.6"
@@ -54,6 +51,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "@emnapi/wasi-threads": "1.2.1",
         "tslib": "^2.4.0"
@@ -66,6 +64,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "tslib": "^2.4.0"
       }
@@ -77,6 +76,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "tslib": "^2.4.0"
       }
@@ -94,7 +94,6 @@
       "os": [
         "aix"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -112,7 +111,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -130,7 +128,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -148,7 +145,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -166,7 +162,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -184,7 +179,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -202,7 +196,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -220,7 +213,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -238,7 +230,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -256,7 +247,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -274,7 +264,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -292,7 +281,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -310,7 +298,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -328,7 +315,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -346,7 +332,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -364,7 +349,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -382,7 +366,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -400,7 +383,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -418,7 +400,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -436,7 +417,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -454,7 +434,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -472,7 +451,6 @@
       "os": [
         "openharmony"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -490,7 +468,6 @@
       "os": [
         "sunos"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -508,7 +485,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -526,7 +502,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -544,7 +519,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -884,18 +858,17 @@
       }
     },
     "node_modules/@fuzdev/gro": {
-      "version": "0.205.1",
-      "resolved": "https://registry.npmjs.org/@fuzdev/gro/-/gro-0.205.1.tgz",
-      "integrity": "sha512-o5WBXWSH/UlN1BsDnpBNIi0WHR7lj7UFGltH/JctSP7oSB2ojvmoXD5OLCEeVdRVcDaSQKl48xcXKUwHKqVSmQ==",
+      "version": "0.206.0",
+      "resolved": "https://registry.npmjs.org/@fuzdev/gro/-/gro-0.206.0.tgz",
+      "integrity": "sha512-11nkTAEWDOvkgzynRChQS+bj3tc7R0NduB+eHLXzXZJqz66nc/oop8Ttvz0UkjTBPX/zzgtU8QuDDNyA7buf5A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
+        "@fuzdev/tsv_wasm": "^0.1.0",
         "chokidar": "^5.0.0",
         "dotenv": "^17.2.3",
         "esm-env": "^1.2.2",
         "oxc-parser": "^0.99.0",
-        "prettier": "^3.7.4",
-        "prettier-plugin-svelte": "^3.5.1",
         "ts-blank-space": "^0.6.2",
         "tslib": "^2.8.1"
       },
@@ -1393,27 +1366,38 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/@rolldown/binding-android-arm64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.0.3.tgz",
-      "integrity": "sha512-454rs7jHngixp/NMxd5srYD57OnzSlZ/eFTETjORQHLwJG1lRtmNOJcBerZlfu4GjKqeq8aCCIQrMdHyhI51Hw==",
+    "node_modules/@rollup/rollup-android-arm-eabi": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.62.2.tgz",
+      "integrity": "sha512-6o7ZLZK+BeenkZCFNDXqpbjw9bD6nuWonvS/lwQJp7NoVVxm6p3qE7qQ5jGuBjiFsgvqjD8mZAU5oWxTmbOeOg==",
       "cpu": [
-        "arm64"
+        "arm"
       ],
       "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
         "android"
+      ]
+    },
+    "node_modules/@rollup/rollup-android-arm64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm64/-/rollup-android-arm64-4.62.2.tgz",
+      "integrity": "sha512-BaH7BllCACHoH1LguOU56UItGfUWjujlO65kS9LAodViaN4bwIKd7oeW/ZHJ/4ljr/7MIiENnNy3HJ0zXv8Zkw==",
+      "cpu": [
+        "arm64"
       ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
     },
-    "node_modules/@rolldown/binding-darwin-arm64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.0.3.tgz",
-      "integrity": "sha512-PcAhP+ynjURNyy8SKGl5DQP94aGuB/7JrXJb/t7P+hanXvQVMWzUvRRhBAcg/lNRadBhoUPqSoP4xw5tR/KBEA==",
+    "node_modules/@rollup/rollup-darwin-arm64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-arm64/-/rollup-darwin-arm64-4.62.2.tgz",
+      "integrity": "sha512-v39RCCvj4He82I9sFmk+M1VZ0PLM9sfsLVikjfx2hYBNALhrrOR2D3JjQA6AhlaSOgcR+RzrKY7e1+bT6SUO/A==",
       "cpu": [
         "arm64"
       ],
@@ -1422,15 +1406,12 @@
       "optional": true,
       "os": [
         "darwin"
-      ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      ]
     },
-    "node_modules/@rolldown/binding-darwin-x64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.0.3.tgz",
-      "integrity": "sha512-9YpfeUvSE2RS7wysJ81uOZkXJz7f7Q55H2Gvp3VEw/EsahqDtrphrZ0EwDLK5vvKOzaCrBsjF8JmnMLcUt78Gg==",
+    "node_modules/@rollup/rollup-darwin-x64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-x64/-/rollup-darwin-x64-4.62.2.tgz",
+      "integrity": "sha512-yl0y2vq3S3lHeuXhEdss6TWfKW8vkujImO12tn4ZkG/4oghr09LvdYm2RElVjokTQiUvDUGXLGsYeLqUMCKpGA==",
       "cpu": [
         "x64"
       ],
@@ -1439,15 +1420,26 @@
       "optional": true,
       "os": [
         "darwin"
+      ]
+    },
+    "node_modules/@rollup/rollup-freebsd-arm64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-freebsd-arm64/-/rollup-freebsd-arm64-4.62.2.tgz",
+      "integrity": "sha512-tT4pvt4qXD+vEoezupCWi+a1F0vvDiksiHc+PxRlYTOH1I6/X4id9jPxTP+Fg+545euaFT1jJVs4CEdHZAU1vw==",
+      "cpu": [
+        "arm64"
       ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ]
     },
-    "node_modules/@rolldown/binding-freebsd-x64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.0.3.tgz",
-      "integrity": "sha512-yB1IlAsSNHncV6SCTL27/MVGR5htvQsoGxIv5KMGXALp+Ll1wYsn+x98M9MW7qa+NdSbvrrY7ANI4wLJ0n1e6g==",
+    "node_modules/@rollup/rollup-freebsd-x64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-freebsd-x64/-/rollup-freebsd-x64-4.62.2.tgz",
+      "integrity": "sha512-6nU5F2wCW+qvCBhTn1pdIU3bzsIoF7EUwsCDRxilWGprQR6yd508YnH9+OKFCwpfS8pjZqDUmnCAr7exax0XCg==",
       "cpu": [
         "x64"
       ],
@@ -1456,32 +1448,46 @@
       "optional": true,
       "os": [
         "freebsd"
-      ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      ]
     },
-    "node_modules/@rolldown/binding-linux-arm-gnueabihf": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.0.3.tgz",
-      "integrity": "sha512-Yi30IVAAfLUCy2MseFjbB1jAMDl1VMCAas5StnYp8da9+CKvMd2H2cbEjWcw5NPaPqzvYkVIaF1nNUG+b7u/sw==",
+    "node_modules/@rollup/rollup-linux-arm-gnueabihf": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm-gnueabihf/-/rollup-linux-arm-gnueabihf-4.62.2.tgz",
+      "integrity": "sha512-n1GJHPOvpIfhi3TmrCeh6S6URt9BFCt0KQE3qvexyGCTAKpR4Lg+eWvNZEqu7epxwus/8ElT3hacYEucm49SZg==",
       "cpu": [
         "arm"
       ],
       "dev": true,
+      "libc": [
+        "glibc"
+      ],
       "license": "MIT",
       "optional": true,
       "os": [
         "linux"
+      ]
+    },
+    "node_modules/@rollup/rollup-linux-arm-musleabihf": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm-musleabihf/-/rollup-linux-arm-musleabihf-4.62.2.tgz",
+      "integrity": "sha512-JqgflS8wEB+UXV/vS1RpRbifGBeN4D5lz8D8oOFbFZw4vedvdOgCFAjfBmIMdW3yL10XpQQ0Ambepw6MXrhOnA==",
+      "cpu": [
+        "arm"
       ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      "dev": true,
+      "libc": [
+        "musl"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "linux"
+      ]
     },
-    "node_modules/@rolldown/binding-linux-arm64-gnu": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.0.3.tgz",
-      "integrity": "sha512-jsO7R8To+AdlYgUmN5sHSCZbfhtMBkO0WUx8iORQnPcMMdgr7qM2DQmMwgabs3GhNztdmoKkMKQFHD6DTMCIQw==",
+    "node_modules/@rollup/rollup-linux-arm64-gnu": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-linux-arm64-gnu/-/rollup-linux-arm64-gnu-4.62.2.tgz",
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+      "version": "7.3.6",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.6.tgz",
+      "integrity": "sha512-4XP60spRGjSZFf1qYH+dJIkK2znL3zQfl9KkOV9MkkRR/3Dls0dxaBsQPTloEc5BLXWPL9vsOxopxyKoMmDueg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "lightningcss": "^1.32.0",
-        "picomatch": "^4.0.4",
-        "postcss": "^8.5.15",
-        "rolldown": "1.0.3",
-        "tinyglobby": "^0.2.17"
+        "esbuild": "^0.27.0 || ^0.28.0",
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.3",
+        "postcss": "^8.5.6",
+        "rollup": "^4.43.0",
+        "tinyglobby": "^0.2.15"
       },
       "bin": {
         "vite": "bin/vite.js"
@@ -4458,10 +4259,9 @@
       },
       "peerDependencies": {
         "@types/node": "^20.19.0 || >=22.12.0",
-        "@vitejs/devtools": "^0.1.18",
-        "esbuild": "^0.27.0 || ^0.28.0",
         "jiti": ">=1.21.0",
         "less": "^4.0.0",
+        "lightningcss": "^1.21.0",
         "sass": "^1.70.0",
         "sass-embedded": "^1.70.0",
         "stylus": ">=0.54.8",
@@ -4474,18 +4274,15 @@
         "@types/node": {
           "optional": true
         },
-        "@vitejs/devtools": {
-          "optional": true
-        },
-        "esbuild": {
-          "optional": true
-        },
         "jiti": {
           "optional": true
         },
         "less": {
           "optional": true
         },
+        "lightningcss": {
+          "optional": true
+        },
         "sass": {
           "optional": true
         },
diff --git a/package.json b/package.json
index e1c6a86..5bf4516 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "test": "gro test",
     "preview": "vite preview",
     "deploy": "gro deploy",
-    "update-benchmarks": "cp ../tsv/benches/deno/results/report.json src/routes/docs/benchmarks/benchmarks.json"
+    "update-benchmarks": "cp ../tsv/benches/js/results/report.node.json src/routes/docs/benchmarks/benchmarks.json && cp ../tsv/benches/js/results/report.json src/routes/docs/benchmarks/benchmarks_cross_runtime.json && cp ../tsv/benches/js/results/report.conformance.node.json src/routes/docs/benchmarks/benchmarks_conformance.json && gro format"
   },
   "type": "module",
   "engines": {
@@ -28,52 +28,32 @@
     "@fuzdev/fuz_css": "^0.63.2",
     "@fuzdev/fuz_ui": "^0.206.5",
     "@fuzdev/fuz_util": "^0.65.2",
-    "@fuzdev/gro": "^0.205.1",
+    "@fuzdev/gro": "^0.206.0",
     "@fuzdev/mdz": "^0.2.0",
     "@fuzdev/tsv_wasm": "^0.1.0",
     "@ryanatkn/eslint-config": "^0.12.1",
     "@sveltejs/acorn-typescript": "^1.0.9",
     "@sveltejs/adapter-static": "^3.0.10",
-    "@sveltejs/kit": "^2.61.1",
-    "@sveltejs/vite-plugin-svelte": "^7.1.2",
+    "@sveltejs/kit": "^2.69.1",
+    "@sveltejs/vite-plugin-svelte": "^6.2.4",
     "@types/estree": "^1.0.8",
     "@types/node": "^24.12.4",
     "@webref/css": "^8.2.0",
     "eslint": "^9.39.1",
     "eslint-plugin-svelte": "^3.13.1",
     "esm-env": "^1.2.2",
-    "magic-string": "^0.30.21",
-    "prettier": "^3.7.4",
-    "prettier-plugin-svelte": "^3.4.1",
-    "svelte": "^5.56.0",
-    "svelte-check": "^4.3.6",
+    "svelte": "^5.56.4",
+    "svelte-check": "^4.7.2",
     "svelte-docinfo": "^0.5.4",
     "svelte2tsx": "^0.7.47",
     "tslib": "^2.8.1",
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.48.1",
-    "vite": "^8.0.16",
+    "vite": "^7.3.6",
     "vitest": "^4.1.9",
     "zimmerframe": "^1.1.4",
     "zod": "^4.3.6"
   },
-  "prettier": {
-    "plugins": [
-      "prettier-plugin-svelte"
-    ],
-    "useTabs": true,
-    "printWidth": 100,
-    "singleQuote": true,
-    "bracketSpacing": false,
-    "overrides": [
-      {
-        "files": "package.json",
-        "options": {
-          "useTabs": false
-        }
-      }
-    ]
-  },
   "sideEffects": [
     "**/*.css"
   ],
diff --git a/src/app.html b/src/app.html
index e3061bc..a1c58fd 100644
--- a/src/app.html
+++ b/src/app.html
@@ -1,23 +1,29 @@
 <!doctype html>
 <html lang="en">
-	<head>
-		<meta charset="utf-8" />
-		<link rel="icon" href="%sveltekit.assets%/favicon.png" />
-		<link rel="icon" href="%sveltekit.assets%/logo.svg" sizes="any" type="image/svg+xml" />
-		<meta name="viewport" content="width=device-width, initial-scale=1" />
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%sveltekit.assets%/favicon.png" />
+    <link
+      rel="icon"
+      href="%sveltekit.assets%/logo.svg"
+      sizes="any"
+      type="image/svg+xml"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
 
-		<script>
-			document.documentElement.classList.add(
-				((c) =>
-					c === 'dark' || (c !== 'light' && matchMedia('(prefers-color-scheme:dark)').matches)
-						? 'dark'
-						: 'light')(localStorage.getItem('fuz:color-scheme')),
-			);
-		</script>
+    <script>
+      document.documentElement.classList.add(
+        ((c) =>
+          c === "dark" ||
+          (c !== "light" && matchMedia("(prefers-color-scheme:dark)").matches)
+            ? "dark"
+            : "light")(localStorage.getItem("fuz:color-scheme")),
+      );
+    </script>
 
-		%sveltekit.head%
-	</head>
-	<body data-sveltekit-preload-data="hover">
-		<div style="display: contents">%sveltekit.body%</div>
-	</body>
+    %sveltekit.head%
+  </head>
+  <body data-sveltekit-preload-data="hover">
+    <div style="display: contents">%sveltekit.body%</div>
+  </body>
 </html>
diff --git a/src/lib/sample.ts b/src/lib/sample.ts
deleted file mode 100644
index 429c922..0000000
--- a/src/lib/sample.ts
+++ /dev/null
@@ -1 +0,0 @@
-export const sample = 'TODO - publish tsv!';
diff --git a/src/routes/docs/benchmarks/+page.svelte b/src/routes/docs/benchmarks/+page.svelte
index ef80d88..a761b5a 100644
--- a/src/routes/docs/benchmarks/+page.svelte
+++ b/src/routes/docs/benchmarks/+page.svelte
@@ -5,15 +5,23 @@
 	import {tome_get_by_slug} from '@fuzdev/fuz_ui/tome.ts';
 
 	import {benchmarks_json} from './benchmarks.ts';
+	import {benchmarks_conformance_json} from './benchmarks_conformance.ts';
+	import {benchmarks_cross_runtime_json} from './benchmarks_cross_runtime.ts';
+	import {benchmarks_cli} from './benchmarks_cli.ts';
 	import {
-		category_color,
 		derive_benchmark_groups,
+		derive_conformance_groups,
 		derive_speedup_summary,
+		format_corpus_source_files,
+		corpus_source_url,
 	} from './benchmark_data.ts';
 	import BenchmarksSummary from './BenchmarksSummary.svelte';
 	import BenchmarksGroup from './BenchmarksGroup.svelte';
+	import BenchmarksConformance from './BenchmarksConformance.svelte';
 	import BenchmarksSizes from './BenchmarksSizes.svelte';
 	import BenchmarksMeta from './BenchmarksMeta.svelte';
+	import BenchmarksCrossRuntime from './BenchmarksCrossRuntime.svelte';
+	import BenchmarksCli from './BenchmarksCli.svelte';
 
 	const LIBRARY_ITEM_NAME = 'benchmarks';
 
@@ -21,8 +29,12 @@
 
 	const groups = derive_benchmark_groups(benchmarks_json);
 	const speedup_rows = derive_speedup_summary(groups);
+	const conformance_groups = derive_conformance_groups(benchmarks_conformance_json);
 
 	const corpus = $derived(benchmarks_json.corpus);
+	// Derived from the report so the "What's measured" figure can't drift from the
+	// copied data (the report carries per-language file counts, not bytes).
+	const corpus_file_count = $derived(Object.values(corpus).reduce((sum, n) => sum + n, 0));
 	const format_groups = groups.filter((g) => g.operation === 'format');
 	const parse_groups = groups.filter((g) => g.operation === 'parse');
 </script>
@@ -30,120 +42,291 @@
 <TomeContent {tome}>
 	<section>
 		<p>
-			tsv is a toolchain for TypeScript/JS, CSS, and Svelte in Rust. Performance is its priority
-			after correctness, and the numbers compare favorably to Oxc and Biome for its supported
-			languages.
+			tsv is a toolchain for TypeScript/JS, CSS, and Svelte in Rust. After correctness, performance
+			is tsv's next priority. This page shows how it measures up against Prettier, which tsv closely
+			follows, and against Oxc and Biome, which are similar tools with wider language support (tsv
+			doesn't support JSX/TSX/SCSS/etc).
 		</p>
 	</section>
 
-	<section>
-		<div class="legend">
-			<span><i class="swatch" style:background={category_color('tsv_native')}></i> tsv native</span>
-			<span
-				><i class="swatch" style:background={category_color('tsv_native_json')}></i> tsv native json</span
-			>
-			<span><i class="swatch" style:background={category_color('tsv_wasm')}></i> tsv wasm</span>
-			<span
-				><i class="swatch" style:background={category_color('tsv_wasm_json')}></i> tsv wasm json</span
+	<TomeSection>
+		<TomeSectionHeader text="TLDR" />
+		<p>
+			Compared to Oxc and Biome, tsv is faster, smaller, and uses less memory to parse and format
+			its supported languages. This section has a prose summary; skip ahead for charts.
+		</p>
+		<p>
+			The measurements on this page are single-threaded and in-process, where each tool parses or
+			formats one file at a time (isolating engine speed from multi-core parallelism), measured over
+			a large collection of real-world repos: {corpus_file_count.toLocaleString('en-US')} files
+			including Svelte's official repos (svelte, kit, svelte.dev) and the <a
+				href="https://github.com/fuzdev">fuz.dev repos</a
+			>. On that basis:
+		</p>
+		<ul>
+			<li>
+				Formatting TypeScript, tsv is ~1.66x faster than Oxfmt (native-vs-native), ~26x faster than
+				Prettier (native Rust vs Prettier's JS), and ~6.5x faster than Biome (wasm-vs-wasm).
+			</li>
+			<li>
+				Formatting Svelte, tsv is is ~63x faster than Prettier (which Oxfmt's Svelte path delegates
+				to internally) and 7.3x faster than Biome.
+			</li>
+			<li>Formatting CSS, it's ~2.6x faster than Oxfmt and 12.4x faster than Biome.</li>
+			<li>
+				Parsing TypeScript, tsv is ~1.3x faster than Oxc (with the payload-matched span-only AST
+				both emit) and Biome doesn't expose its parser to JS. tsv's default AST adds a per-node
+				line/column <code>loc</code> for drop-in Svelte compatibility, with a fast path to
+				reconstruct locs in JS.
+			</li>
+			<li>
+				A <a href="https://github.com/ryanatkn/oxc-bench-formatter" rel="external"
+					>fork of Oxc's official <code>bench-formatter</code></a
+				> is an end-to-end CLI benchmark with its own corpus. On a real TypeScript repo, tsv formats
+				~3.1x faster than Oxfmt and ~6.5x faster than Biome using 3–10x less memory. Wall-clock
+				measurements are warped by each tool's multi-file parallelism, so they scale with core count
+				and are machine-dependent, and could change with tuning.
+			</li>
+		</ul>
+		<p>
+			Each section below has notes that attempt to fairly contextualize its numbers. The charts show
+			numbers using Node v24, and at the end of the page is a <a href="#Cross-runtime"
+				>cross-runtime comparison</a
+			>.
+		</p>
+	</TomeSection>
+
+	<TomeSection>
+		<TomeSectionHeader text="Like Prettier but speedier" />
+		<BenchmarksSummary rows={speedup_rows} />
+	</TomeSection>
+
+	<TomeSection>
+		<TomeSectionHeader text="Format speed" />
+		<p class="mb_xl5">
+			tsv's formatter is similar to <a href="https://oxc.rs/docs/guide/usage/formatter.html"
+				>Oxfmt</a
 			>
-			<span><i class="swatch" style:background={category_color('biome')}></i> biome</span>
-			<span><i class="swatch" style:background={category_color('oxc')}></i> oxc</span>
-			<span><i class="swatch" style:background={category_color('canonical')}></i> canonical</span>
-		</div>
-	</section>
+			and <a href="https://biomejs.dev/formatter/">Biome</a>. It formats Svelte, TypeScript, and
+			CSS, plus JS as strict-mode TypeScript:
+		</p>
+		{#each format_groups as group (group.language)}
+			<BenchmarksGroup {group} {corpus} />
+		{/each}
+		<aside class="mt_xl5">
+			<p>Notes:</p>
+			<ul>
+				<li>wasm-to-wasm and native-to-native (N-API here) are the fair comparisons</li>
+				<li>
+					Oxfmt formats TypeScript, JS, and CSS with its own native engine, and for Svelte it
+					delegates to Prettier internally (via prettier-plugin-svelte).
+				</li>
+				<li>
+					There's no native Biome entry: its native engine ships only as the <code>biome</code> CLI
+					binary, a separate process rather than an embeddable library, so it can't be fairly timed
+					in-process like the others.
+				</li>
+			</ul>
+		</aside>
+	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Binary size" />
-		<p>
-			Rather than supporting many languages, tsv focuses on Svelte/HTML, TypeScript/JS, and CSS.
-			This lets it be smaller when it's all you need, a quality that's more relevant when used in
-			the browser via wasm:
+		<TomeSectionHeader text="Parse speed" />
+		<p class="mb_xl5">
+			The parse entries that build a full JS AST are comparable in mechanism: tsv and oxc-parser
+			both serialize the AST to JSON in Rust and deserialize it in JS, native and wasm alike. But
+			the deliverables differ — tsv's default wire (<code>tsv-json</code> / <code
+				>tsv_wasm-json</code
+			>) carries a per-node <code>loc</code> (line/column) object that oxc-parser's default
+			span-only AST omits, and that <code>loc</code> is roughly half the wire bytes and most of its
+			JSON.parse cost. The <code>tsv-json-no-locations</code> / <code
+				>tsv_wasm-json-no-locations</code
+			> entries drop it, emitting the same span-only shape oxc does, so those are the
+			payload-matched, apples-to-apples comparison with oxc-parser (line/column stays derivable from
+			the offsets plus source, so nothing is lost). The tsv-internal and tsv_wasm-internal entries
+			build the native AST but skip JS-side materialization, so they show raw in-engine speed rather
+			than a cross-tool comparison.
 		</p>
-		<BenchmarksSizes sizes={benchmarks_json.binary_sizes} />
+		{#each parse_groups as group (group.language)}
+			<BenchmarksGroup {group} {corpus} />
+		{/each}
 		<aside class="mt_xl5">
-			<p>Important notes:</p>
+			<p>Some notes:</p>
 			<ul>
-				<li>apples-to-apples comparisons are difficult here because of differing scope</li>
-				<li>Biome includes a parser, formatter, and linter supporting many languages</li>
 				<li>
-					tsv and tsv_wasm include a parser and formatter for Svelte/HTML, TypeScript/JS, and CSS
+					JS parsers skip the Rust-to-JS serialization step that tsv and oxc pay for, which keeps
+					them competitive.
 				</li>
 				<li>
-					oxc-parser only parses TypeScript and JS, not CSS or HTML; oxfmt is its separate formatter
+					Biome is shown grayed-out across all three parse groups because its <code
+						>@biomejs/js-api</code
+					> package doesn't expose a parser to JS (only formatting and linting). Biome parses
+					internally but never surfaces the AST across the JS boundary, so it can't be measured.
 				</li>
-				<li>oxfmt has no wasm build as of June 2026</li>
 				<li>
-					tsv doesn't publish native artifacts yet, but it builds them for benchmarking over FFI
-					with Deno
+					oxc-parser only parses TypeScript and JS (and JSX, not measured here). oxc-parser doesn't
+					expose a CSS parser, and it doesn't parse Svelte.
+				</li>
+				<li>
+					<code>tsv-json-no-locations</code> / <code>tsv_wasm-json-no-locations</code> are the fair,
+					payload-matched comparison with oxc-parser: they emit tsv's span-only wire (offsets, no
+					per-node <code>loc</code>), matching oxc's default AST shape. The plain
+					<code>tsv-json</code> entries carry the richer <code>loc</code>-bearing drop-in AST that
+					Svelte's compiler consumes for sourcemaps — a strictly larger deliverable, so a slower
+					number that isn't an engine-speed difference.
+				</li>
+				<li>
+					<code>tsv internal (node napi)</code> and <code>tsv_wasm internal</code> aren't a fair
+					comparison to the other entries — they skip JS-side AST materialization entirely, so
+					they're included only to show tsv's own JSON-serialization overhead against its
+					non-internal entry.
 				</li>
 			</ul>
 		</aside>
 	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Speedier than Prettier" />
-		<BenchmarksSummary rows={speedup_rows} {groups} {corpus} />
+		<TomeSectionHeader text="Parse conformance" />
+		<p class="mb_xl5">
+			Separate from the speed numbers above that use a real-world corpus of code, this section
+			measures parse <em>coverage</em>: how much of a much larger, deliberately hard corpus each
+			parser accepts — Prettier's format-test suites, Svelte's compiler test suite, CSS extracted
+			from
+			<a href="https://github.com/web-platform-tests/wpt">web-platform-tests</a>, and <a
+				href="https://github.com/tc39/test262">test262</a
+			>'s expected-valid strict-mode tests.
+		</p>
+		<BenchmarksConformance groups={conformance_groups} />
+		<aside class="mt_xl5">
+			<p>Reading these numbers:</p>
+			<ul>
+				<li>
+					Coverage is per engine, not per binding — a parser accepts the same files whether it runs
+					native or wasm, so each tool appears once.
+				</li>
+				<li>
+					For Svelte, the corpus excludes the files svelte/compiler itself rejects, so its number is
+					100% by construction and the rest read as drop-in fidelity against it — higher is strictly
+					better. For TypeScript and CSS the canonical parser isn't a clean validity oracle
+					(acorn-typescript trails modern syntax, Svelte's CSS parser is lenient), so those suites
+					keep intentionally-invalid and out-of-scope inputs — read them relative to each other, not
+					as an absolute target.
+				</li>
+				<li>
+					Accepting a file says nothing about producing the <em>right</em> AST — tsv's output is
+					separately verified against the canonical parsers (svelte/compiler, acorn-typescript) at
+					corpus scale in its repo's conformance gates.
+				</li>
+			</ul>
+			{#if benchmarks_conformance_json.corpus_sources?.length}
+				<p>Corpus sources ({benchmarks_conformance_json.corpus_sources.length}):</p>
+				<ul>
+					{#each benchmarks_conformance_json.corpus_sources as source (source.path)}
+						{@const url = corpus_source_url(source)}
+						<li>
+							{#if url}
+								<!-- eslint-disable-next-line svelte/no-navigation-without-resolve -->
+								<a href={url} rel="external"><code>{source.path}</code></a>
+							{:else}
+								<code>{source.path}</code>
+							{/if}
+							— {format_corpus_source_files(source)}
+						</li>
+					{/each}
+				</ul>
+			{/if}
+		</aside>
 	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Format" />
-		<p class="mb_xl5">
-			tsv's formatter is similar to <a href="https://oxc.rs/docs/guide/usage/formatter.html"
-				>Oxfmt</a
-			>
-			and <a href="https://biomejs.dev/">Biome</a>. Today it can format Svelte, TypeScript, and CSS,
-			plus HTML and JS (as strict-mode TypeScript):
+		<TomeSectionHeader text="Binary size" />
+		<p>
+			Rather than supporting many languages, tsv focuses on Svelte/HTML, TypeScript/JS, and CSS.
+			This lets it be smaller when it's all you need, a quality that's more relevant when used in
+			the browser via wasm.
 		</p>
-		{#each format_groups as group (group.language)}
-			<BenchmarksGroup {group} {corpus} />
-		{/each}
+		<BenchmarksSizes sizes={benchmarks_json.binary_sizes} />
 		<aside class="mt_xl5">
-			<p>How to read these numbers:</p>
+			<p>Important notes:</p>
 			<ul>
+				<li>apples-to-apples comparisons are difficult here because of differing scope</li>
+				<li>oxc-parser only parses TypeScript and JS/JSX; oxfmt is its separate formatter</li>
+				<li>tsv and tsv_wasm include a parser and formatter for Svelte, TypeScript/JS, and CSS</li>
 				<li>
-					Each tool is timed producing its own formatting, so outputs may differ. Prettier is the
-					reference, and Oxfmt also targets Prettier conformance. tsv tracks Prettier closely but
-					intentionally diverges in some documented cases, and Biome formats to its own style.
+					Biome bundles a parser, formatter, and linter for many languages, but its native engine
+					ships only as the CLI binary, not an embeddable library, and
+					<code>@biomejs/js-api</code> exposes only formatting and linting. Every native entry here
+					is an in-process library call, so a subprocess CLI isn't a comparable artifact — only
+					Biome's wasm build is included
 				</li>
 				<li>
-					Oxfmt only formats TypeScript and JS with its own native engine. For CSS and Svelte it
-					bundles and runs Prettier internally (plus prettier-plugin-svelte for Svelte), so its CSS
-					and Svelte rows essentially re-measure Prettier minus a little wrapper overhead.
+					the <code>oxc-parser + oxfmt</code> entry under Full toolchain sums oxc's separate parser
+					and formatter packages, since together they're the closest equivalent to tsv's single
+					parse+format build
 				</li>
 				<li>
-					The Prettier baseline runs in JS while the headline tsv row is the native build, so it's a
-					cross-tier comparison. For an engine-vs-engine read, compare within a runtime tier: wasm
-					vs wasm, or native vs native.
+					that combined figure is a little unfair to oxc: oxfmt statically links its own copy of the
+					same oxc parser (it has to parse to format) but doesn't depend on the
+					<code>oxc-parser</code> package or expose parsing through its API. The two are
+					independently compiled, so the sum counts the parser's compiled code twice — more than a
+					single build exposing both operations (like tsv's) would need
 				</li>
 				<li>
-					tsv's CSS coverage is intentionally lower than Prettier's and Biome's - it rejects
-					non-standard non-Svelte CSS (SCSS, LESS, CSS Modules, IE hacks) to stay slim and focused.
-					Full CSS-spec compliance is on the roadmap, including error recovery.
+					oxfmt has no wasm build as of July 2026, so it's shown grayed-out under Formatter, holding
+					its slot beside <code>oxfmt (napi)</code>
+				</li>
+				<li>
+					tsv doesn't publish native artifacts yet, but it builds them for benchmarking — an N-API
+					addon for Node and Bun, and a C-FFI library for Deno
 				</li>
 			</ul>
 		</aside>
 	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Parse" />
+		<TomeSectionHeader text="End-to-end CLI benchmark" />
 		<p class="mb_xl5">
-			The parse rows that build a full JS AST are directly comparable: tsv and oxc-parser both
-			serialize the AST to JSON in Rust and deserialize it in JS, native and wasm alike. The
-			tsv-internal and tsv_wasm-internal rows are tsv's parse-only numbers - they build the native
-			AST but skip JS-side materialization, so they show raw in-engine speed rather than a
-			cross-tool comparison.
+			The numbers above measure tsv's engine in-process, one file at a time, using tsv's original
+			benchmarks. This section describes the results from a fork of Oxc's official
+			<a href="https://github.com/oxc-project/bench-formatter" rel="external"
+				><code>bench-formatter</code></a
+			>
+			that
+			<a href="https://github.com/ryanatkn/oxc-bench-formatter" rel="external">adds tsv</a>, timing
+			the whole CLI end-to-end — process spawn, file discovery, I/O, and each tool's default
+			multi-file parallelism — plus peak memory. It's the "what you experience typing the command"
+			measure, run on real repositories. tsv appears in the two JSX-free scenarios (it has no
+			JSX/TSX parser).
 		</p>
-		{#each parse_groups as group (group.language)}
-			<BenchmarksGroup {group} {corpus} />
-		{/each}
+		<BenchmarksCli report={benchmarks_cli} />
 		<aside class="mt_xl5">
-			<p>Some notes:</p>
+			<p>How to read these numbers:</p>
 			<ul>
 				<li>
-					JS parsers skip the Rust-to-JS serialization step that tsv and oxc pay for, which keeps
-					them competitive.
+					This measures the whole command, not the engine in isolation. tsv, oxfmt, and biome
+					parallelize across files while prettier is effectively serial, so the wall-clock ratios
+					bake in each tool's parallelism and scale with core count — they're only meaningful
+					alongside the machine they ran on. The <code>vs tsv (CPU work)</code> column is the
+					parallelism-neutral view (total CPU time across threads): on the TypeScript repo tsv is
+					~3x Oxfmt in wall-clock but ~2x in CPU work, the rest being cores Oxfmt uses and Prettier
+					can't.
+				</li>
+				<li>
+					Peak memory doesn't depend on thread count, so it's the most directly comparable figure —
+					tsv uses 3–13x less than every other tool across both scenarios.
+				</li>
+				<li>
+					Formatting width isn't identical: prettier, biome, and oxfmt format at width 80 (oxfmt
+					explicitly, the others by default), while tsv is non-configurable at width 100. Different
+					widths mean different line-break work — a real if small asymmetry with no fix on tsv's
+					side.
+				</li>
+				<li>
+					Errors aren't penalized by the harness, but both tsv scenarios run a preflight parse check
+					first and every formatter accepts the whole corpus, so nothing is skipped. tsv is left out
+					of the fork's other three scenarios because they contain JSX/TSX or measure work tsv
+					doesn't do (embedded-language formatting, import and Tailwind-class sorting).
 				</li>
-				<li>Some parts of tsv are not well-optimized yet, particularly parsing CSS.</li>
 			</ul>
 		</aside>
 	</TomeSection>
@@ -152,39 +335,54 @@
 		<TomeSectionHeader text="Benchmarking details" />
 		<p>
 			All numbers are single-threaded: every library formats or parses one file at a time, measured
-			sequentially with no cross-file parallelism. These are per-file, single-core latency and
-			throughput numbers - not the multi-core batch throughput a CLI gets when it formats many files
-			at once, which most of these tools (tsv included) can do.
+			sequentially with no cross-file parallelism. Each row is the total time to process the whole
+			corpus once on a single core — not the multi-core batch throughput a CLI gets when it formats
+			many files at once, which most of these tools (tsv included) can do.
 		</p>
 		<p class="mb_xl3">
-			What's measured: around 5,500 files (~15 MB) of
-			<code>.svelte</code>/<code>.html</code>, <code>.ts</code>/<code>.js</code>, and
-			<code>.css</code>, from three sources: the fuz.dev libraries and apps, upstream framework
-			source (Svelte, SvelteKit, and the svelte.dev site), and formatter conformance fixtures
-			(Prettier's and prettier-plugin-svelte's own test suites - deliberately tricky edge cases, not
-			typical code, so they skew the corpus toward hard cases).
+			What's measured: {corpus_file_count.toLocaleString('en-US')} files of <code>.svelte</code>,
+			<code>.ts</code>/<code>.js</code>, and <code>.css</code> — real-world code only, from two
+			sources: the author's libraries, apps, and sites (the fuz.dev ecosystem plus personal
+			SvelteKit sites), and upstream framework source (Svelte, SvelteKit, and the svelte.dev site).
+			The CSS set also includes real-authored CSS extracted from those components'
+			<code>&lt;style&gt;</code> blocks, concatenated per repo — standalone CSS files are rare in
+			this ecosystem, and the same bytes appear in the Svelte rows (rows are never summed). Test
+			files count as real code and stay in; fixture files (the formatter test suites that used to be
+			part of this corpus, and fixture subtrees inside the measured repos) are excluded —
+			deliberately tricky edge cases measure conformance, not typical throughput, and are covered by
+			the parse-conformance section above.
 		</p>
 		<BenchmarksMeta baseline={benchmarks_json} />
 	</TomeSection>
-</TomeContent>
 
-<style>
-	.legend {
-		display: flex;
-		gap: var(--space_xl);
-		flex-wrap: wrap;
-		font-size: var(--font_size_sm);
-		margin-bottom: var(--space_xl);
-	}
-	.legend span {
-		display: flex;
-		align-items: center;
-		gap: var(--space_xs);
-	}
-	.swatch {
-		display: inline-block;
-		width: 1.6rem;
-		height: 1.6rem;
-		border-radius: var(--border_radius_xs);
-	}
-</style>
+	<TomeSection>
+		<TomeSectionHeader text="Cross-runtime" />
+		<p>
+			The same benchmark harness runs under three JS runtimes — Node, Deno, and Bun. The headline
+			numbers above are the Node run. The native entry differs by runtime: Node and Bun load tsv's
+			N-API addon, while Deno loads its C-FFI library. They share code but cross a different binding
+			boundary, so a per-runtime delta on the same row is a runtime effect — the JS engine or the
+			binding boundary — not a difference in tsv's own engine, which is identical across all three.
+		</p>
+		<aside class="mt_xl5 mb_xl5">
+			<p>Reading the tables:</p>
+			<ul>
+				<li>
+					tsv's native binding boundaries are at parity across runtimes — the
+					<code>tsv-internal</code> rows, which cross the boundary but hand nothing back to
+					materialize, sit within a few percent Node vs Deno. The visible spread is largely confined
+					to the JSON-materializing parse rows, where it reflects each JS engine's
+					<code>JSON.parse</code> cost rather than the N-API-vs-FFI boundary: Deno and Bun edge out
+					Node there. Node is the headline as the default N-API path, not because it's the fastest
+					native number.
+				</li>
+				<li>
+					tsv's own paths — native (N-API/FFI) and wasm — run on all three runtimes. Bun currently
+					fails to load two third-party wasm implementations (biome's wasm-bundler and oxc-parser's
+					wasm32-wasi binding), so they show <code>fail</code> in the Bun column.
+				</li>
+			</ul>
+		</aside>
+		<BenchmarksCrossRuntime report={benchmarks_cross_runtime_json} />
+	</TomeSection>
+</TomeContent>
diff --git a/src/routes/docs/benchmarks/BenchmarksBar.svelte b/src/routes/docs/benchmarks/BenchmarksBar.svelte
index 128c7b5..23540b6 100644
--- a/src/routes/docs/benchmarks/BenchmarksBar.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksBar.svelte
@@ -14,6 +14,9 @@
 		ratio_text,
 		ratio_color,
 		annotation,
+		disabled = false,
+		on_enter,
+		on_leave,
 	}: {
 		label: string;
 		bar_fraction: number;
@@ -24,48 +27,95 @@
 		// optional extra context shown between value and ratio (corpus coverage in
 		// benchmark groups, gzipped size in binary-size groups); omitted when absent
 		annotation?: string | undefined;
+		// a grayed-out, inert placeholder (a tool that doesn't run in this group) —
+		// no bar, no value, no ratio, just the label held in its shared slot
+		disabled?: boolean;
+		// hover-to-rebaseline: fired when the pointer enters/leaves the row so the
+		// group can adopt this row as its ratio anchor; omitted on inert placeholders
+		on_enter?: (() => void) | undefined;
+		on_leave?: (() => void) | undefined;
 	} = $props();
+
+	// the parenthesized binding suffix (`(wasm)`/`(node napi)`) describes how the
+	// tool actually ran in this (Node) report - meaningless for biome's disabled
+	// placeholder (its only variant is wasm, so there's no ambiguity to lose).
+	// oxc-parser keeps its suffix even when disabled since it has two placeholder
+	// rows (napi and wasm) that would otherwise become indistinguishable.
+	const display_label = $derived(
+		disabled && category === 'biome'
+			? format_label(label).replace(/ \([^)]*\)$/, '')
+			: format_label(label),
+	);
 </script>
 
-<div class="bar-row" class:has-annotation={annotation != null}>
-	<span class="bar-label">{format_label(label)}</span>
+<!-- the hover handlers only re-baseline the group's ratios — a non-essential
+	visual aid over data that's fully visible regardless, with the default anchor
+	serving keyboard and no-hover users — so the row stays presentational -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
+<div
+	class="bar-row"
+	class:has-annotation={annotation != null}
+	class:disabled
+	onmouseenter={on_enter}
+	onmouseleave={on_leave}
+>
+	<span class="bar-label">{display_label}</span>
 	<div class="bar-track">
-		<div
-			class="bar-fill"
-			style:width="{bar_fraction * 100}%"
-			style:background={category_color(category)}
-		></div>
+		{#if !disabled}
+			<div
+				class="bar-fill"
+				style:width="{bar_fraction * 100}%"
+				style:background={category_color(category)}
+			></div>
+		{/if}
 	</div>
-	<span class="bar-value">{value.value} <span class="text_50">{value.unit}</span></span>
+	<span class="bar-value">
+		{#if disabled}
+			<span class="text_40">n/a</span>
+		{:else}
+			{value.value} <span class="text_50">{value.unit}</span>
+		{/if}
+	</span>
 	{#if annotation != null}
 		<span class="bar-annotation text_50">{annotation}</span>
 	{/if}
-	<span class="bar-ratio" style:color={ratio_color}>{ratio_text}</span>
+	<span class="bar-ratio" style:color={ratio_color}
+		>{#if !disabled}{ratio_text}{/if}</span
+	>
 </div>
 
 <style>
 	.bar-row {
 		display: grid;
-		grid-template-columns: 12rem 1fr 5.6rem 3.4rem;
+		grid-template-columns: 16rem 1fr 5.6rem 3.4rem;
 		align-items: center;
 		gap: var(--space_sm);
-		height: 2rem;
+		/* rows sit flush (no inter-row gap) with a little padding, so the hover
+		 * highlight reads as one contiguous, full-height band per row */
+		padding-block: var(--space_xs);
+		border-radius: var(--border_radius_xs);
 	}
 	.bar-row.has-annotation {
-		grid-template-columns: 12rem 1fr 5.6rem 6rem 3.4rem;
+		grid-template-columns: 16rem 1fr 5.6rem 6rem 3.4rem;
+	}
+	.bar-row.disabled {
+		opacity: 0.6;
+	}
+	/* hovering an enabled row makes it the group's ratio anchor (driven in JS); the
+	 * highlight marks which row every ratio in the group is now measured against */
+	.bar-row:not(.disabled):hover {
+		background-color: var(--fg_10);
 	}
 	.bar-annotation {
 		font-size: var(--font_size_xs);
 		text-align: right;
-		font-variant-numeric: tabular-nums;
 		white-space: nowrap;
 	}
 	.bar-label {
 		font-size: var(--font_size_sm);
 		text-align: right;
-		overflow: hidden;
-		text-overflow: ellipsis;
 		white-space: nowrap;
+		/* these may overflow slightly/harmlessly, just need to visually check */
 	}
 	.bar-track {
 		height: 1.2rem;
@@ -81,7 +131,6 @@
 	.bar-value {
 		font-size: var(--font_size_sm);
 		text-align: right;
-		font-variant-numeric: tabular-nums;
 		white-space: nowrap;
 	}
 	.bar-ratio {
diff --git a/src/routes/docs/benchmarks/BenchmarksBaselineGroup.svelte b/src/routes/docs/benchmarks/BenchmarksBaselineGroup.svelte
new file mode 100644
index 0000000..f63490a
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksBaselineGroup.svelte
@@ -0,0 +1,50 @@
+<script lang="ts">
+	import {
+		baseline_ratio_color,
+		compute_baseline_ratio,
+		format_baseline_ratio,
+		type BaselineDirection,
+		type BaselineRow,
+	} from './benchmark_data.ts';
+	import BenchmarksBar from './BenchmarksBar.svelte';
+
+	const {
+		rows,
+		direction,
+	}: {
+		// ordered so the first enabled row is the default baseline (callers lead with
+		// the canonical reference for speed, the smallest build for size)
+		rows: Array<BaselineRow>;
+		direction: BaselineDirection;
+	} = $props();
+
+	// the row currently acting as the baseline: the hovered row while the pointer is
+	// over an enabled row, otherwise the group default (its first enabled row). Each
+	// group instance owns its own state, so the three groups in a section re-baseline
+	// independently.
+	let hovered_key: string | undefined = $state(undefined);
+	const default_anchor_key = $derived(rows.find((r) => !r.disabled)?.key);
+	const anchor_key = $derived(hovered_key ?? default_anchor_key);
+	const anchor_row = $derived(rows.find((r) => r.key === anchor_key));
+</script>
+
+<div class="column">
+	{#each rows as row (row.key)}
+		{@const ratio =
+			!row.disabled && anchor_row && row.key !== anchor_key
+				? compute_baseline_ratio(direction, row.raw, anchor_row.raw)
+				: undefined}
+		<BenchmarksBar
+			label={row.label}
+			bar_fraction={row.bar_fraction}
+			category={row.category}
+			value={row.value}
+			annotation={row.annotation}
+			disabled={row.disabled}
+			ratio_text={ratio != null ? format_baseline_ratio(direction, ratio) : '1.0x'}
+			ratio_color={ratio != null ? baseline_ratio_color(direction, ratio) : 'var(--text_40)'}
+			on_enter={row.disabled ? undefined : () => (hovered_key = row.key)}
+			on_leave={() => (hovered_key = undefined)}
+		/>
+	{/each}
+</div>
diff --git a/src/routes/docs/benchmarks/BenchmarksCli.svelte b/src/routes/docs/benchmarks/BenchmarksCli.svelte
new file mode 100644
index 0000000..88613bc
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksCli.svelte
@@ -0,0 +1,113 @@
+<script lang="ts">
+	import {format_speedup} from './benchmark_data.ts';
+	import type {BenchmarksCliReport, CliScenario, CliFormatterResult} from './benchmarks_cli.ts';
+
+	const {
+		report,
+	}: {
+		report: BenchmarksCliReport;
+	} = $props();
+
+	const format_time = (ms: number): string =>
+		ms < 1000 ? `${Math.round(ms)} ms` : `${(ms / 1000).toFixed(1)} s`;
+
+	// tsv is the reference row; every ratio is `other / tsv` (>1 = tsv is that many
+	// times faster / lighter). Returns null for the tsv row itself.
+	interface Row {
+		result: CliFormatterResult;
+		is_tsv: boolean;
+		wall_ratio: number | null;
+		cpu_ratio: number | null;
+		memory_ratio: number | null;
+	}
+	const to_rows = (scenario: CliScenario): Array<Row> => {
+		const tsv = scenario.results.find((r) => r.label === 'tsv');
+		if (!tsv) return [];
+		return scenario.results.map((result) => {
+			const is_tsv = result === tsv;
+			return {
+				result,
+				is_tsv,
+				wall_ratio: is_tsv ? null : result.wall_ms / tsv.wall_ms,
+				cpu_ratio: is_tsv ? null : result.cpu_ms / tsv.cpu_ms,
+				memory_ratio: is_tsv ? null : result.memory_mb / tsv.memory_mb,
+			};
+		});
+	};
+</script>
+
+{#each report.scenarios as scenario (scenario.key)}
+	<div class="scenario">
+		<h3>{scenario.heading}</h3>
+		<p>{scenario.description}</p>
+		<div class="table-scroll">
+			<table>
+				<thead>
+					<tr>
+						<th class="formatter">formatter</th>
+						<th>time</th>
+						<th>vs tsv</th>
+						<th>vs tsv (CPU work)</th>
+						<th>peak RSS</th>
+						<th>vs tsv</th>
+					</tr>
+				</thead>
+				<tbody>
+					{#each to_rows(scenario) as row (row.result.label)}
+						<tr class:tsv={row.is_tsv}>
+							<td class="formatter">{row.result.label}</td>
+							<td>{format_time(row.result.wall_ms)}</td>
+							<td class="speedup"
+								>{row.wall_ratio == null ? '—' : format_speedup(row.wall_ratio)}</td
+							>
+							<td class="speedup">{row.cpu_ratio == null ? '—' : format_speedup(row.cpu_ratio)}</td>
+							<td>{Math.round(row.result.memory_mb)} MB</td>
+							<td class="speedup"
+								>{row.memory_ratio == null ? '—' : format_speedup(row.memory_ratio)}</td
+							>
+						</tr>
+					{/each}
+				</tbody>
+			</table>
+		</div>
+	</div>
+{/each}
+
+<p class="versions">
+	Measured on {report.machine} — prettier {report.versions.prettier}, biome {report.versions.biome},
+	oxfmt {report.versions.oxfmt}, tsv {report.versions.tsv}. Wall-clock ratios scale with core count;
+	"vs tsv (CPU work)" is the parallelism-neutral view.
+</p>
+
+<style>
+	.scenario {
+		margin-bottom: var(--space_xl2);
+	}
+	/* wide table scrolls in its own container so the page body never scrolls sideways */
+	.table-scroll {
+		overflow-x: auto;
+	}
+	table {
+		width: 100%;
+	}
+	th,
+	td {
+		padding: var(--space_xs) var(--space_sm);
+		text-align: right;
+		white-space: nowrap;
+	}
+	.formatter {
+		text-align: left;
+	}
+	.speedup {
+		font-weight: 600;
+	}
+	tr.tsv {
+		font-weight: 700;
+		background-color: var(--fg_1);
+	}
+	.versions {
+		font-size: var(--font_size_sm);
+		opacity: 0.7;
+	}
+</style>
diff --git a/src/routes/docs/benchmarks/BenchmarksConformance.svelte b/src/routes/docs/benchmarks/BenchmarksConformance.svelte
new file mode 100644
index 0000000..050dceb
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksConformance.svelte
@@ -0,0 +1,76 @@
+<script lang="ts">
+	import {format_coverage_percent, type ConformanceGroup} from './benchmark_data.ts';
+
+	const {
+		groups,
+	}: {
+		groups: Array<ConformanceGroup>;
+	} = $props();
+
+	const LANGUAGE_LABELS: Record<string, string> = {
+		svelte: 'Svelte',
+		typescript: 'TypeScript',
+		css: 'CSS',
+	};
+</script>
+
+{#each groups as group (group.language)}
+	<div class="mb_xl5">
+		<p class="heading">
+			Parsing {group.files_total.toLocaleString('en-US')}
+			{LANGUAGE_LABELS[group.language] ?? group.language} files
+		</p>
+		<table>
+			<thead>
+				<tr>
+					<th></th>
+					<th class="num">files accepted</th>
+					<th class="num">coverage</th>
+				</tr>
+			</thead>
+			<tbody>
+				{#each group.rows as row (row.name)}
+					<tr>
+						<td>{row.name}</td>
+						<td class="num"
+							>{row.files_processed.toLocaleString('en-US')} / {row.files_total.toLocaleString(
+								'en-US',
+							)}</td
+						>
+						<td class="num percent">{format_coverage_percent(row.coverage_fraction)}</td>
+					</tr>
+				{/each}
+			</tbody>
+		</table>
+	</div>
+{/each}
+
+<style>
+	.heading {
+		margin-bottom: var(--space_xs);
+	}
+	table {
+		width: 100%;
+		max-width: 40rem;
+		border-collapse: collapse;
+	}
+	th {
+		font-weight: 400;
+		font-size: var(--font_size_sm);
+		color: var(--text_40);
+		text-align: left;
+		padding-block: var(--space_xs);
+	}
+	td {
+		padding-block: var(--space_xs);
+		border-top: var(--border_width) solid var(--border_color);
+	}
+	.num {
+		text-align: right;
+		white-space: nowrap;
+		font-variant-numeric: tabular-nums;
+	}
+	.percent {
+		font-weight: 700;
+	}
+</style>
diff --git a/src/routes/docs/benchmarks/BenchmarksCrossRuntime.svelte b/src/routes/docs/benchmarks/BenchmarksCrossRuntime.svelte
new file mode 100644
index 0000000..16de023
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksCrossRuntime.svelte
@@ -0,0 +1,146 @@
+<script lang="ts">
+	import {
+		category_color,
+		cross_runtime_ratio_background,
+		derive_cross_runtime_groups,
+		derive_runtime_versions,
+		format_cross_runtime_label,
+		format_speedup,
+		order_cross_runtime_runtimes,
+		type CrossRuntimeReport,
+	} from './benchmark_data.ts';
+
+	const {
+		report,
+	}: {
+		report: CrossRuntimeReport;
+	} = $props();
+
+	// The node/deno/bun versions the columns were measured under (node-first).
+	const runtime_versions = $derived(derive_runtime_versions(report));
+
+	// Node-first (the flagship N-API runtime), then deno, then bun — the same
+	// display order `derive_cross_runtime_groups` anchors its ratios on.
+	const runtimes = $derived(order_cross_runtime_runtimes(report.runtimes));
+	const base = $derived(runtimes[0]);
+	// ratio columns compare every other runtime against the base (node)
+	const others = $derived(runtimes.filter((r) => r !== base));
+
+	const groups = $derived(derive_cross_runtime_groups(report));
+
+	const format_ops = (n: number | undefined): string => (n == null ? 'fail' : n.toFixed(2));
+
+	const group_label = (operation: string, language: string): string =>
+		`${operation === 'format' ? 'Format' : 'Parse'} ${language}`;
+</script>
+
+<div class="cross-runtime">
+	{#if report.mixed_vintage}
+		<aside class="mixed-vintage">
+			⚠ The per-runtime reports backing these tables come from different commits/versions, so the
+			ratios are unreliable until every runtime is re-run.
+		</aside>
+	{/if}
+	{#if report.mixed_machine}
+		<aside class="mixed-vintage">
+			⚠ The per-runtime reports backing these tables were produced on different hardware, so the
+			ratios are not comparable until every runtime is re-run on one machine.
+		</aside>
+	{/if}
+	{#if runtime_versions.length}
+		<ul class="versions">
+			{#each runtime_versions as { runtime, version } (runtime)}
+				<li><code>{runtime}</code> {version}</li>
+			{/each}
+		</ul>
+	{/if}
+	{#each groups as group (group.group)}
+		<div class="group">
+			<h4 class="mt_0 mb_sm">{group_label(group.operation, group.language)}</h4>
+			<table>
+				<thead>
+					<tr>
+						<th></th>
+						{#each runtimes as runtime (runtime)}
+							<th class="num">{runtime}</th>
+						{/each}
+						{#each others as runtime (runtime)}
+							<th class="num">{runtime}/{base}</th>
+						{/each}
+					</tr>
+				</thead>
+				<tbody>
+					{#each group.rows as row (row.name)}
+						<tr>
+							<td>
+								<i class="swatch" style:background={category_color(row.category)}></i>
+								{format_cross_runtime_label(row.name)}
+							</td>
+							{#each runtimes as runtime (runtime)}
+								<td class="num">{format_ops(row.ops_per_second[runtime])}</td>
+							{/each}
+							{#each others as runtime (runtime)}
+								{@const ratio = row.ratio_vs_base[runtime]}
+								<td
+									class="num ratio"
+									style:background={ratio != null
+										? cross_runtime_ratio_background(ratio)
+										: undefined}
+								>
+									{ratio != null ? format_speedup(ratio) : 'fail'}
+								</td>
+							{/each}
+						</tr>
+					{/each}
+				</tbody>
+			</table>
+		</div>
+	{/each}
+	<p class="text_40">
+		sweeps/sec — one sweep is a full pass over the group's timed file set (higher is faster); ratios
+		are vs <code>{base}</code> (&gt; 1 = faster than {base}). A
+		<code>fail</code> is an implementation that runtime can't load (see notes above). The
+		<code>native</code> rows load each runtime's idiomatic binding of the same engine — the N-API
+		addon under <code>node</code> and <code>bun</code> (<code>tsv (node napi)</code>), the C-FFI
+		library under <code>deno</code> (<code>tsv (deno ffi)</code>) — so the <code>deno</code> column
+		is a first-class FFI-vs-N-API comparison, not a re-run of the same binding.
+	</p>
+</div>
+
+<style>
+	/* the warning red tint over fuz_css's base aside styling */
+	.mixed-vintage {
+		border-left-color: var(--color_c_50);
+	}
+	/* the runtime versions the columns were measured under — a compact horizontal row */
+	.versions {
+		display: flex;
+		flex-wrap: wrap;
+		column-gap: var(--space_lg);
+		row-gap: var(--space_xs);
+		list-style: none;
+		padding: 0;
+		margin-bottom: var(--space_xl3);
+		font-size: var(--font_size_sm);
+		opacity: 0.7;
+	}
+	.group {
+		margin-bottom: var(--space_xl4);
+	}
+	table {
+		width: 100%;
+	}
+	.num {
+		text-align: right;
+	}
+	.ratio {
+		font-weight: 700;
+	}
+	td .swatch {
+		display: inline-block;
+		width: 1.2rem;
+		height: 1.2rem;
+		border-radius: var(--border_radius_xs);
+		vertical-align: middle;
+	}
+</style>
diff --git a/src/routes/docs/benchmarks/BenchmarksGroup.svelte b/src/routes/docs/benchmarks/BenchmarksGroup.svelte
index d3e2cb8..4ad6e1a 100644
--- a/src/routes/docs/benchmarks/BenchmarksGroup.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksGroup.svelte
@@ -1,12 +1,6 @@
 <script lang="ts">
-	import {
-		format_coverage,
-		format_ns,
-		format_speedup,
-		speedup_color,
-		type BenchmarkGroup,
-	} from './benchmark_data.ts';
-	import BenchmarksBar from './BenchmarksBar.svelte';
+	import {format_ns, type BaselineRow, type BenchmarkGroup} from './benchmark_data.ts';
+	import BenchmarksBaselineGroup from './BenchmarksBaselineGroup.svelte';
 
 	const {
 		group,
@@ -16,15 +10,24 @@
 		corpus: Record<string, number>;
 	} = $props();
 
-	// coverage annotations only appear on baselines that carry them (version 3+)
-	const has_coverage = $derived(group.entries.some((e) => e.files_total != null));
-
 	const total = $derived(corpus[group.language] ?? 0);
-	// the timed benchmark runs on the per-group intersection (`files_iterated`), a
-	// subset of the discovered corpus; show "<timed> of <total>" when we have it,
-	// falling back to the corpus total on older baselines (< version 4)
-	const count_label = $derived(
-		group.files_iterated != null ? `${group.files_iterated} of ${total}` : `${total}`,
+	// the count of files actually benchmarked (`files_iterated`), falling back to the
+	// corpus total on older baselines (< version 4)
+	const count_label = $derived((group.files_iterated ?? total).toLocaleString('en-US'));
+
+	const rows: Array<BaselineRow> = $derived(
+		group.entries.map((e) => ({
+			key: e.name,
+			label: e.name,
+			category: e.category,
+			bar_fraction: e.bar_fraction,
+			// the whole-sweep mean — total time to process the group's iterated corpus
+			// once, which is also what the ratios derive from via `raw`
+			value: format_ns(e.mean_ns),
+			raw: e.mean_ns,
+			annotation: undefined,
+			disabled: e.disabled ?? false,
+		})),
 	);
 </script>
 
@@ -35,25 +38,7 @@
 			{count_label}
 			{group.language} files</span
 		>
-		{#if has_coverage}<span class="text_40" style:text-align="right"
-				>files handled / total &nbsp;&middot;&nbsp; speed</span
-			>{/if}
+		<span class="text_40" style:text-align="right">total time &nbsp;&middot;&nbsp; speed</span>
 	</p>
-	<div class="column gap_xs">
-		{#each group.entries as entry (entry.name)}
-			<BenchmarksBar
-				label={entry.name}
-				bar_fraction={entry.bar_fraction}
-				category={entry.category}
-				value={format_ns(entry.mean_ns)}
-				ratio_text={entry.speedup_vs_canonical != null
-					? format_speedup(entry.speedup_vs_canonical)
-					: '1.0x'}
-				ratio_color={entry.speedup_vs_canonical != null
-					? speedup_color(entry.speedup_vs_canonical)
-					: 'var(--text_40)'}
-				annotation={format_coverage(entry.files_processed, entry.files_total)}
-			/>
-		{/each}
-	</div>
+	<BenchmarksBaselineGroup {rows} direction="speed" />
 </div>
diff --git a/src/routes/docs/benchmarks/BenchmarksMeta.svelte b/src/routes/docs/benchmarks/BenchmarksMeta.svelte
index 596ee77..ddea0ef 100644
--- a/src/routes/docs/benchmarks/BenchmarksMeta.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksMeta.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import {site_context} from '@fuzdev/fuz_ui/site.svelte.ts';
 
-	import type {BenchmarkBaseline} from './benchmark_data.ts';
+	import {type BenchmarkBaseline, derive_corpus_repos} from './benchmark_data.ts';
 
 	const {
 		baseline,
@@ -11,6 +11,8 @@
 
 	const site = site_context.get();
 
+	const corpus_repos = $derived(derive_corpus_repos(baseline.corpus_sources));
+
 	const formatted_date = $derived(
 		new Date(baseline.timestamp).toLocaleDateString('en-US', {
 			year: 'numeric',
@@ -25,7 +27,7 @@
 
 <div class="meta">
 	<div class="meta-section">
-		<h4 class="mt_0 mb_sm">corpus</h4>
+		<h4 class="mt_0 mb_sm">corpus stats</h4>
 		<ul>
 			{#each Object.entries(baseline.corpus) as [lang, count] (lang)}
 				<li>{lang}: {count} file{count !== 1 ? 's' : ''}</li>
@@ -40,15 +42,24 @@
 			<li>acorn-typescript {baseline.versions.acorn_ts}</li>
 			<li>prettier {baseline.versions.prettier}</li>
 			<li>prettier-plugin-svelte {baseline.versions.prettier_svelte}</li>
-			<li>oxc-parser {baseline.versions.oxc_parser}</li>
-			<li>oxfmt {baseline.versions.oxfmt}</li>
-			<li>biome {baseline.versions.biome}</li>
+			{#if baseline.versions.oxc_parser}
+				<li>oxc-parser {baseline.versions.oxc_parser}</li>
+			{/if}
+			{#if baseline.versions.oxfmt}
+				<li>oxfmt {baseline.versions.oxfmt}</li>
+			{/if}
+			{#if baseline.versions.biome}
+				<li>biome {baseline.versions.biome}</li>
+			{/if}
 		</ul>
 	</div>
 	<div class="meta-section">
 		<h4 class="mt_0 mb_sm">run</h4>
 		<ul>
 			<li>{formatted_date}</li>
+			{#if baseline.runtime}
+				<li>runtime: {baseline.runtime}</li>
+			{/if}
 			{#if baseline.versions.tsv}
 				<li>tsv {baseline.versions.tsv}</li>
 			{/if}
@@ -58,6 +69,33 @@
 			</li>
 		</ul>
 	</div>
+	{#if baseline.machine}
+		<div class="meta-section">
+			<h4 class="mt_0 mb_sm">environment</h4>
+			<ul>
+				<li>{baseline.machine.cpu_model}</li>
+				<li>{baseline.machine.os}/{baseline.machine.arch}</li>
+				{#if baseline.runtime}
+					<li>{baseline.runtime} {baseline.machine.runtime_version}</li>
+				{:else}
+					<li>{baseline.machine.runtime_version}</li>
+				{/if}
+			</ul>
+		</div>
+	{/if}
+	{#if corpus_repos.length}
+		<div class="meta-section corpus-repos">
+			<h4 class="mt_0 mb_sm">corpus repos</h4>
+			<ul class="repos">
+				{#each corpus_repos as repo (repo.url)}
+					<li>
+						<!-- eslint-disable-next-line svelte/no-navigation-without-resolve -->
+						<a href={repo.url}>{repo.label}</a>
+					</li>
+				{/each}
+			</ul>
+		</div>
+	{/if}
 </div>
 
 <style>
@@ -73,4 +111,14 @@
 		padding: 0;
 		margin: 0;
 	}
+	/* the repos list spans its own row below the compact stat columns and wraps horizontally */
+	.corpus-repos {
+		flex-basis: 100%;
+	}
+	.repos {
+		display: flex;
+		flex-wrap: wrap;
+		column-gap: var(--space_lg);
+		row-gap: var(--space_xs);
+	}
 </style>
diff --git a/src/routes/docs/benchmarks/BenchmarksSizes.svelte b/src/routes/docs/benchmarks/BenchmarksSizes.svelte
index ad9df5f..3fb8cc5 100644
--- a/src/routes/docs/benchmarks/BenchmarksSizes.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksSizes.svelte
@@ -2,11 +2,11 @@
 	import {
 		format_bytes,
 		format_gzip_size,
-		categorize_size,
-		size_ratio_color,
+		derive_size_groups,
+		type BaselineRow,
 		type BinarySize,
 	} from './benchmark_data.ts';
-	import BenchmarksBar from './BenchmarksBar.svelte';
+	import BenchmarksBaselineGroup from './BenchmarksBaselineGroup.svelte';
 
 	const {
 		sizes,
@@ -14,71 +14,42 @@
 		sizes: Array<BinarySize>;
 	} = $props();
 
-	const wasm_sizes = $derived(sizes.filter((s) => s.kind === 'wasm'));
-	const native_sizes = $derived(sizes.filter((s) => s.kind === 'native'));
+	// grouped by capability (full toolchain / formatter / parser) so each build
+	// sits beside its closest competitor; wasm and native mix within a group
+	const size_groups = $derived(derive_size_groups(sizes));
 
-	const make_display = (items: Array<BinarySize>) => {
-		const sorted = items.toSorted((a, b) => a.bytes - b.bytes);
-		const max = Math.max(0, ...items.map((s) => s.bytes));
-		// anchor "vs tsv" ratios on the headline build per kind - `tsv_wasm` (the
-		// flagship full build the bench executes) for wasm, `tsv (native)` for native —
-		// matching the report.md table; `tsv_format_wasm` covers reports generated
-		// before shape v2 added the third build, then any tsv-prefixed label.
-		// Without this the wasm group anchors on whatever sorts largest and every
-		// ratio disagrees with the report.
-		const tsv =
-			sorted.find((s) => s.label === 'tsv_wasm' || s.label === 'tsv (native)') ??
-			sorted.find((s) => s.label === 'tsv_format_wasm') ??
-			sorted.find((s) => s.label.startsWith('tsv'));
-		return sorted.map((s) => ({
-			...s,
-			bar_fraction: max > 0 ? s.bytes / max : 0,
-			ratio_vs_tsv: tsv && s !== tsv ? s.bytes / tsv.bytes : undefined,
-			category: categorize_size(s.label),
+	// a disabled placeholder (e.g. oxfmt's absent wasm build) has no gzip size of its
+	// own; when its group's other entries do carry one, fall back to 'n/a' rather than
+	// omitting the annotation entirely - otherwise that row drops the annotation
+	// column and its bar-track renders wider than its siblings'
+	const has_gzip = (entries: ReadonlyArray<{gzip_bytes: number | null}>) =>
+		entries.some((e) => e.gzip_bytes != null);
+
+	const to_rows = (group: (typeof size_groups)[number]): Array<BaselineRow> => {
+		const group_has_gzip = has_gzip(group.entries);
+		return group.entries.map((s) => ({
+			key: s.label,
+			label: s.label,
+			category: s.category,
+			bar_fraction: s.bar_fraction,
+			value: format_bytes(s.bytes),
+			raw: s.bytes,
+			annotation: s.disabled
+				? group_has_gzip
+					? 'n/a'
+					: undefined
+				: format_gzip_size(s.gzip_bytes),
+			disabled: s.disabled ?? false,
 		}));
 	};
-
-	const wasm_display = $derived(make_display(wasm_sizes));
-	const native_display = $derived(make_display(native_sizes));
 </script>
 
-{#if wasm_display.length > 0}
-	<div class="size-group">
-		<h3>wasm</h3>
-		<div class="column gap_xs">
-			{#each wasm_display as s (s.label)}
-				<BenchmarksBar
-					label={s.label}
-					bar_fraction={s.bar_fraction}
-					category={s.category}
-					value={format_bytes(s.bytes)}
-					ratio_text={s.ratio_vs_tsv != null ? `${s.ratio_vs_tsv.toFixed(1)}x` : '1.0x'}
-					ratio_color={s.ratio_vs_tsv != null ? size_ratio_color(s.ratio_vs_tsv) : 'var(--text_40)'}
-					annotation={format_gzip_size(s.gzip_bytes)}
-				/>
-			{/each}
-		</div>
-	</div>
-{/if}
-
-{#if native_display.length > 0}
+{#each size_groups as group (group.capability)}
 	<div class="size-group">
-		<h3>native</h3>
-		<div class="column gap_xs">
-			{#each native_display as s (s.label)}
-				<BenchmarksBar
-					label={s.label}
-					bar_fraction={s.bar_fraction}
-					category={s.category}
-					value={format_bytes(s.bytes)}
-					ratio_text={s.ratio_vs_tsv != null ? `${s.ratio_vs_tsv.toFixed(1)}x` : '1.0x'}
-					ratio_color={s.ratio_vs_tsv != null ? size_ratio_color(s.ratio_vs_tsv) : 'var(--text_40)'}
-					annotation={format_gzip_size(s.gzip_bytes)}
-				/>
-			{/each}
-		</div>
+		<h3>{group.heading}</h3>
+		<BenchmarksBaselineGroup rows={to_rows(group)} direction="size" />
 	</div>
-{/if}
+{/each}
 
 <style>
 	.size-group {
diff --git a/src/routes/docs/benchmarks/BenchmarksSummary.svelte b/src/routes/docs/benchmarks/BenchmarksSummary.svelte
index af3b40e..c1a085c 100644
--- a/src/routes/docs/benchmarks/BenchmarksSummary.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksSummary.svelte
@@ -1,40 +1,27 @@
 <script lang="ts">
-	import {format_speedup, type BenchmarkGroup, type SpeedupRow} from './benchmark_data.ts';
+	import {format_speedup, type SpeedupRow} from './benchmark_data.ts';
 
 	const {
 		rows,
-		groups,
-		corpus,
 	}: {
 		rows: Array<SpeedupRow>;
-		groups: Array<BenchmarkGroup>;
-		corpus: Record<string, number>;
 	} = $props();
-
-	// the speedups are measured on the per-group intersection (`files_iterated`),
-	// not the full discovered corpus — label the columns with the timed set,
-	// falling back to the corpus total on older baselines (< version 4)
-	const count_label = (language: string): string => {
-		const group = groups.find((g) => g.operation === 'format' && g.language === language);
-		const total = corpus[language] ?? 0;
-		return group?.files_iterated != null ? `${group.files_iterated} of ${total}` : `${total}`;
-	};
 </script>
 
 <p>
-	tsv is heavily inspired by and borrows architectural patterns from <a href="https://prettier.io/"
-		>Prettier</a
-	>. We're very grateful for the hard work of its
-	<a href="https://github.com/prettier/prettier/graphs/contributors">contributors</a>. tsv offers a
-	speedup over Prettier:
+	tsv's formatter is inspired by and borrows architectural patterns from <a
+		href="https://prettier.io/">Prettier</a
+	>, and we're grateful for the hard work of its
+	<a href="https://github.com/prettier/prettier/graphs/contributors">contributors</a>.
+	Single-threaded on the benchmarked corpus, tsv is this much faster than Prettier:
 </p>
 <table>
 	<thead>
 		<tr>
 			<th></th>
-			<th class="color_h_50">Svelte<br /><small>{count_label('svelte')} files</small></th>
-			<th class="color_i_50">TypeScript<br /><small>{count_label('typescript')} files</small></th>
-			<th class="color_a_50">CSS<br /><small>{count_label('css')} files</small></th>
+			<th class="color_h_50">Svelte</th>
+			<th class="color_i_50">TypeScript</th>
+			<th class="color_a_50">CSS</th>
 		</tr>
 	</thead>
 	<tbody>
@@ -56,11 +43,6 @@
 	}
 	thead th {
 		padding: var(--space_xs) var(--space_sm);
-		font-size: var(--font_size_sm);
-	}
-	thead th small {
-		font-weight: 400;
-		opacity: 0.7;
 	}
 	tbody td {
 		padding: var(--space_xs) var(--space_sm);
@@ -72,6 +54,5 @@
 	.speedup {
 		font-size: var(--font_size_xl);
 		font-weight: 700;
-		font-variant-numeric: tabular-nums;
 	}
 </style>
diff --git a/src/routes/docs/benchmarks/benchmark_data.ts b/src/routes/docs/benchmarks/benchmark_data.ts
index 9bf0958..4cda956 100644
--- a/src/routes/docs/benchmarks/benchmark_data.ts
+++ b/src/routes/docs/benchmarks/benchmark_data.ts
@@ -1,7 +1,12 @@
-// Raw types matching the tsv bench.ts `Baseline` format
+// Raw types matching the tsv bench's per-runtime report format
+// (`benches/js/results/report.<runtime>.json` — the site's flagship detailed
+// view is the Node report, the N-API native path)
 
 export interface BenchmarkBaseline {
 	version: number;
+	// The runtime that produced this report (`node` for the flagship view).
+	// Present from report `version` 5 on.
+	runtime?: string;
 	timestamp: string;
 	git_commit: string;
 	corpus: Record<string, number>;
@@ -11,23 +16,91 @@ export interface BenchmarkBaseline {
 	// Counts of silenced third-party stderr noise, keyed by message pattern.
 	// Present from baseline `version` 4 on; not rendered, kept for parity.
 	suppressed_noise?: Record<string, number>;
+	// Which corpus/surface produced the report: `perf` (real-world corpus,
+	// format + parse) or `conformance` (the deliberately-hard fixture suites,
+	// disjoint from the perf corpus, parse only). Present from `version` 6 on.
+	corpus_kind?: 'perf' | 'conformance';
+	// Per-entry corpus composition (path + loaded file count) — discloses which
+	// sources were present on the machine that produced the report. Present
+	// from `version` 6 on.
+	corpus_sources?: Array<CorpusSource>;
+	// The machine that produced the report — CPU model, OS/arch, runtime version.
+	// The throughput numbers are machine-relative, so this is the environment the
+	// meta panel discloses. Present from `version` 7 on (absent on older reports).
+	machine?: Machine;
 }
 
+// The hardware/runtime a report was measured on. Excludes hostname (the reports
+// are published) and volatile fields (free memory, load) that would churn.
+export interface Machine {
+	cpu_model: string;
+	os: string;
+	arch: string;
+	// The producing runtime's own version (`node`/`deno`/`bun` version string).
+	runtime_version: string;
+}
+
+export interface CorpusSource {
+	path: string;
+	files: number;
+	// Per-language split of `files` (svelte/typescript/css counts summing to
+	// `files`). Present on reports whose loader emitted it; older reports carry
+	// only the `files` total, so treat it as optional.
+	by_language?: Partial<Record<string, number>>;
+	// The source's GitHub origin, git-detected by the bench at report-build time
+	// (URL + commit + subpath). Present from `version` 8 on; absent on older
+	// reports and on sources with no GitHub remote — treat as optional.
+	repo?: CorpusRepoRef;
+}
+
+// A corpus source's GitHub origin — see `CorpusSource.repo` and `corpus_source_url`.
+export interface CorpusRepoRef {
+	// Canonical https GitHub URL, e.g. `https://github.com/sveltejs/svelte`.
+	url: string;
+	// `owner/name` (e.g. `sveltejs/svelte`) — a compact label.
+	slug: string;
+	// The commit the corpus was loaded at (full SHA); `''` for a harvested cache
+	// linked at its canonical upstream root (no pin).
+	commit: string;
+	// Path within the repo to this source (`''` = repo root).
+	subpath: string;
+}
+
+/**
+ * The GitHub URL for a corpus source, pinned to the measured commit + subpath
+ * (`…/tree/<commit>/<subpath>`) when detected, or the repo root for a
+ * canonical-upstream cache (empty `commit`). `undefined` when the source has no
+ * detected origin (older reports, or the local `svelte_styles` cache).
+ */
+export const corpus_source_url = (source: CorpusSource): string | undefined => {
+	const repo = source.repo;
+	if (!repo) return undefined;
+	if (!repo.commit) return repo.url;
+	return repo.subpath
+		? `${repo.url}/tree/${repo.commit}/${repo.subpath}`
+		: `${repo.url}/tree/${repo.commit}`;
+};
+
 export interface BaselineEntry {
 	name: string;
 	group: string;
-	mean_ns: number;
-	p50_ns: number;
-	p75_ns: number;
-	p90_ns: number;
-	p95_ns: number;
-	p99_ns: number;
-	min_ns: number;
-	max_ns: number;
-	std_dev_ns: number;
-	cv: number;
-	ops_per_second: number;
-	sample_size: number;
+	// Timing stats are `null` on a coverage-only report (the conformance surface
+	// the site refreshes from — parse coverage measured, timed phase skipped). A
+	// perf report always carries real numbers, and only the perf path
+	// (`derive_benchmark_groups`) reads these, so the nulls are unreachable there
+	// but must be expressed for the shared cast to stay sound.
+	mean_ns: number | null;
+	p50_ns: number | null;
+	p75_ns: number | null;
+	p90_ns: number | null;
+	p95_ns: number | null;
+	p99_ns: number | null;
+	min_ns: number | null;
+	max_ns: number | null;
+	std_dev_ns: number | null;
+	cv: number | null;
+	ops_per_second: number | null;
+	sample_size: number | null;
 	// Per-implementation preflight coverage: files this impl processed / the
 	// language's total discovered files. Present from baseline `version` 3 on;
 	// absent (or `null`) in older baselines.
@@ -36,6 +109,9 @@ export interface BaselineEntry {
 	// Files this impl was actually timed on (the per-group intersection in
 	// default mode). Present from baseline `version` 4 on.
 	files_iterated?: number | null;
+	// Present from report `version` 5 on (matches the report's top-level);
+	// not rendered, kept for parity.
+	runtime?: string;
 }
 
 export interface BaselineVersions {
@@ -84,10 +160,14 @@ export interface BenchmarkDisplayEntry {
 	name: string;
 	mean_ns: number;
 	bar_fraction: number;
-	speedup_vs_canonical: number | undefined;
 	category: ImplementationCategory;
 	files_processed: number | null;
 	files_total: number | null;
+	// A placeholder entry mirrored from another language's group for a tool that
+	// doesn't run in this one (e.g. `oxc-parser` under svelte/css parse) — rendered
+	// grayed-out and inert so the parse groups share one entry order. Absent on real,
+	// measured entries.
+	disabled?: boolean;
 }
 
 export interface SpeedupRow {
@@ -105,9 +185,11 @@ const CATEGORY_BY_NAME: Record<string, ImplementationCategory> = {
 	'acorn-typescript': 'canonical',
 	tsv: 'tsv_native',
 	'tsv-json': 'tsv_native_json',
+	'tsv-json-no-locations': 'tsv_native_json',
 	'tsv-internal': 'tsv_native',
 	tsv_wasm: 'tsv_wasm',
 	'tsv_wasm-json': 'tsv_wasm_json',
+	'tsv_wasm-json-no-locations': 'tsv_wasm_json',
 	'tsv_wasm-internal': 'tsv_wasm',
 	'biome-wasm': 'biome',
 	'oxc-parser': 'oxc',
@@ -115,25 +197,15 @@ const CATEGORY_BY_NAME: Record<string, ImplementationCategory> = {
 	oxfmt: 'oxc',
 };
 
-const categorize_name = (name: string): ImplementationCategory => CATEGORY_BY_NAME[name] ?? 'oxc';
+export const categorize_name = (name: string): ImplementationCategory =>
+	CATEGORY_BY_NAME[name] ?? 'oxc';
 
 export const categorize_size = (label: string): ImplementationCategory => {
 	// covers `tsv_wasm` plus the `tsv_format_wasm`/`tsv_parse_wasm` subsets
 	if (label.startsWith('tsv') && label.includes('wasm')) return 'tsv_wasm';
 	if (label.startsWith('tsv')) return 'tsv_native';
 	if (label.startsWith('biome')) return 'biome';
-	if (label.includes('oxc') || label.includes('oxfmt')) return 'oxc';
-	return 'oxc';
-};
-
-// Canonical entry names per group
-const CANONICAL_BY_GROUP: Record<string, string> = {
-	'parse/svelte': 'svelte/compiler',
-	'parse/typescript': 'acorn-typescript',
-	'parse/css': 'svelte/compiler',
-	'format/svelte': 'prettier',
-	'format/typescript': 'prettier',
-	'format/css': 'prettier',
+	return 'oxc'; // oxc-parser / oxfmt, and any unrecognized label
 };
 
 // Primary tsv entry names for speedup summary (fair comparisons)
@@ -142,6 +214,46 @@ const PRIMARY_WASM_FORMAT = 'tsv_wasm';
 
 // Derivation functions
 
+// Shared display order for benchmark groups: format before parse, then by
+// language — used by the detailed, conformance, and cross-runtime views alike.
+const OPERATION_ORDER: Record<string, number> = {format: 0, parse: 1};
+const LANGUAGE_ORDER: Record<string, number> = {
+	svelte: 0,
+	typescript: 1,
+	css: 2,
+};
+
+/**
+ * Fixed slot for a format/parse row, applied in place of a size-ordered sort so the
+ * rows read in a stable, meaningful sequence across every group: the canonical
+ * reference first (the default 1.0x anchor), then the cross-tool comparisons (biome,
+ * then oxc), then tsv's JSON-materializing wires (the span-only `no-locations` wire
+ * before the default `loc`-carrying one), then tsv's raw internal engine.
+ */
+const speed_entry_rank = (entry: BenchmarkDisplayEntry): number => {
+	if (entry.category === 'canonical') return 0;
+	if (entry.category === 'biome') return 1;
+	if (entry.category === 'oxc') return 2;
+	if (entry.name.endsWith('-no-locations')) return 3; // tsv json, span-only wire
+	if (entry.name.endsWith('-json')) return 4; // tsv json, loc-carrying wire
+	return 5; // tsv-internal / tsv_wasm-internal — raw in-engine, no JS materialization
+};
+
+/**
+ * Orders format/parse rows by their fixed `speed_entry_rank` slot, then wasm before
+ * native within a tier (the browser-relevant build leads each pairing), then by name
+ * — shared by the initial sort and the re-sort after disabled placeholders are mixed
+ * in, so every group scans identically.
+ */
+const compare_speed_entries = (a: BenchmarkDisplayEntry, b: BenchmarkDisplayEntry): number => {
+	const rank = speed_entry_rank(a) - speed_entry_rank(b);
+	if (rank !== 0) return rank;
+	// wasm before native within a tier
+	const kind = (a.name.includes('wasm') ? 0 : 1) - (b.name.includes('wasm') ? 0 : 1);
+	if (kind !== 0) return kind;
+	return a.name.localeCompare(b.name);
+};
+
 export const derive_benchmark_groups = (baseline: BenchmarkBaseline): Array<BenchmarkGroup> => {
 	const grouped: Map<string, Array<BaselineEntry>> = new Map();
 	for (const entry of baseline.entries) {
@@ -159,29 +271,27 @@ export const derive_benchmark_groups = (baseline: BenchmarkBaseline): Array<Benc
 		const parts = group_key.split('/');
 		const operation = parts[0]!;
 		const language = parts[1]!;
-		const canonical_name = CANONICAL_BY_GROUP[group_key];
-		const canonical_entry_raw = entries.find((e) => e.name === canonical_name);
-		const slowest = Math.max(...entries.map((e) => e.mean_ns));
+		// The sort below leads each group with its canonical reference (Prettier for
+		// format, the JS baseline for parse), so the first row is the default 1.0x
+		// anchor; the shared component reads that default off the first row and
+		// recomputes every ratio, re-baselining onto whichever row is hovered. (Size
+		// groups lead with their smallest build; see `derive_size_groups`.)
+		// `?? 0` coerces the coverage-only null (unreachable on a perf report, the
+		// only kind this runs on) so the display entry's `mean_ns` stays a number.
+		const slowest = Math.max(...entries.map((e) => e.mean_ns ?? 0));
 
 		const display_entries: Array<BenchmarkDisplayEntry> = entries.map((e) => ({
 			name: e.name,
-			mean_ns: e.mean_ns,
-			bar_fraction: slowest > 0 ? e.mean_ns / slowest : 0,
-			speedup_vs_canonical:
-				canonical_entry_raw && e.name !== canonical_name
-					? canonical_entry_raw.mean_ns / e.mean_ns
-					: undefined,
+			mean_ns: e.mean_ns ?? 0,
+			bar_fraction: slowest > 0 ? (e.mean_ns ?? 0) / slowest : 0,
 			category: categorize_name(e.name),
 			files_processed: e.files_processed ?? null,
 			files_total: e.files_total ?? null,
 		}));
 
-		// Sort: canonical first, then by mean_ns descending (slowest first for visual)
-		display_entries.sort((a, b) => {
-			if (a.category === 'canonical' && b.category !== 'canonical') return -1;
-			if (b.category === 'canonical' && a.category !== 'canonical') return 1;
-			return b.mean_ns - a.mean_ns;
-		});
+		// Fixed order (see `compare_speed_entries`): canonical leads as the default 1.0x
+		// anchor, then biome, oxc, tsv's json wires, then tsv's internal engine
+		display_entries.sort(compare_speed_entries);
 
 		const iterated_counts = entries
 			.map((e) => e.files_iterated)
@@ -195,18 +305,131 @@ export const derive_benchmark_groups = (baseline: BenchmarkBaseline): Array<Benc
 		});
 	}
 
-	// Sort groups: format before parse, then by language
-	const LANG_ORDER: Record<string, number> = {svelte: 0, typescript: 1, css: 2};
-	const OP_ORDER: Record<string, number> = {format: 0, parse: 1};
 	result.sort(
 		(a, b) =>
-			(OP_ORDER[a.operation] ?? 9) - (OP_ORDER[b.operation] ?? 9) ||
-			(LANG_ORDER[a.language] ?? 9) - (LANG_ORDER[b.language] ?? 9),
+			(OPERATION_ORDER[a.operation] ?? 9) - (OPERATION_ORDER[b.operation] ?? 9) ||
+			(LANGUAGE_ORDER[a.language] ?? 9) - (LANGUAGE_ORDER[b.language] ?? 9),
 	);
 
+	// Neither `biome` nor (for svelte/css) `oxc-parser` has a real entry in every
+	// parse group. `biome`'s `@biomejs/js-api` never exposes a parser to JS at all
+	// (only formatting and linting), so no parse group has a real biome entry;
+	// `oxc-parser` only parses TypeScript/JS, so the svelte and css parse groups
+	// lack it. Mirror both in as disabled placeholders — biome always, oxc-parser
+	// only where it's missing — then re-sort so they fall into their fixed slots
+	// (biome then oxc, right after the canonical row), giving all three parse groups
+	// one shared entry order.
+	const ts_parse = result.find((g) => g.operation === 'parse' && g.language === 'typescript');
+	const oxc_templates = ts_parse?.entries.filter((e) => e.category === 'oxc') ?? [];
+	for (const group of result) {
+		if (group.operation !== 'parse') continue;
+		const biome_placeholder: BenchmarkDisplayEntry = {
+			name: 'biome-wasm',
+			mean_ns: 0,
+			bar_fraction: 0,
+			category: 'biome',
+			files_processed: null,
+			files_total: null,
+			disabled: true,
+		};
+		const needs_oxc =
+			group.language !== 'typescript' && !group.entries.some((e) => e.category === 'oxc');
+		const oxc_placeholders: Array<BenchmarkDisplayEntry> = needs_oxc
+			? oxc_templates.map((e) => ({
+					...e,
+					bar_fraction: 0,
+					files_processed: null,
+					files_total: null,
+					disabled: true,
+				}))
+			: [];
+		group.entries.push(biome_placeholder, ...oxc_placeholders);
+		group.entries.sort(compare_speed_entries);
+	}
+
 	return result;
 };
 
+// Parse-conformance coverage (the conformance report's headline metric)
+
+export interface ConformanceRow {
+	name: string;
+	files_processed: number;
+	files_total: number;
+	// files_processed / files_total, rendered as the coverage percentage
+	coverage_fraction: number;
+}
+
+export interface ConformanceGroup {
+	language: string;
+	// the language's total discovered files (every row shares it)
+	files_total: number;
+	rows: Array<ConformanceRow>;
+}
+
+/**
+ * One coverage row per ENGINE, not per binding: the conformance headline is
+ * "which files does this parser accept," which is identical across a tool's
+ * native/wasm/internal variants — so the `-wasm` and `-internal` duplicates
+ * are dropped and `tsv-json` stands in for tsv (relabeled plainly, since the
+ * JSON-materialization qualifier is a speed concern, not a coverage one).
+ */
+const CONFORMANCE_ENGINE_NAMES: Record<string, string> = {
+	'svelte/compiler': 'svelte/compiler',
+	'acorn-typescript': 'acorn-typescript',
+	'tsv-json': 'tsv',
+	'oxc-parser': 'oxc-parser',
+};
+
+/**
+ * Derives per-language parse-coverage groups from a conformance report
+ * (`corpus_kind: 'conformance'` — parse groups only). Rows are ordered by coverage,
+ * highest first; entries without coverage data are dropped.
+ */
+export const derive_conformance_groups = (baseline: BenchmarkBaseline): Array<ConformanceGroup> => {
+	const by_language: Map<string, Array<ConformanceRow>> = new Map();
+	for (const entry of baseline.entries) {
+		const [operation, language] = entry.group.split('/');
+		if (operation !== 'parse' || !language) continue;
+		const display_name = CONFORMANCE_ENGINE_NAMES[entry.name];
+		if (!display_name) continue;
+		if (entry.files_processed == null || entry.files_total == null) continue;
+		let rows = by_language.get(language);
+		if (!rows) {
+			rows = [];
+			by_language.set(language, rows);
+		}
+		rows.push({
+			name: display_name,
+			files_processed: entry.files_processed,
+			files_total: entry.files_total,
+			coverage_fraction: entry.files_total > 0 ? entry.files_processed / entry.files_total : 0,
+		});
+	}
+
+	const result: Array<ConformanceGroup> = [];
+	for (const [language, rows] of by_language) {
+		// coverage descending (highest acceptance first), name as a stable tiebreak
+		rows.sort((a, b) => b.coverage_fraction - a.coverage_fraction || a.name.localeCompare(b.name));
+		result.push({
+			language,
+			files_total: Math.max(0, ...rows.map((r) => r.files_total)),
+			rows,
+		});
+	}
+	result.sort((a, b) => (LANGUAGE_ORDER[a.language] ?? 9) - (LANGUAGE_ORDER[b.language] ?? 9));
+	return result;
+};
+
+/**
+ * Formats a coverage fraction as a percentage with two decimals (`99.85%`),
+ * FLOORED rather than rounded — rounding would render e.g. 44219/44220 as
+ * `100.00%` next to a visibly non-total count. Only exact totality reads 100%
+ * (matching the harness's own `coverage_pct` convention in tsv's report.ts).
+ */
+export const format_coverage_percent = (fraction: number): string =>
+	`${(Math.floor(fraction * 10_000) / 100).toFixed(2)}%`;
+
 export const derive_speedup_summary = (groups: Array<BenchmarkGroup>): Array<SpeedupRow> => {
 	const find_speedup = (
 		operation: string,
@@ -236,6 +459,266 @@ export const derive_speedup_summary = (groups: Array<BenchmarkGroup>): Array<Spe
 	];
 };
 
+// Binary-size grouping by capability
+
+/** What a build actually does, used to group binary sizes for like-for-like comparison. */
+export type SizeCapability = 'full' | 'formatter' | 'parser';
+
+/**
+ * Buckets a binary-size label by capability so each build lands next to its
+ * closest competitor: `parser` (tsv's parse-only build, `oxc-parser`),
+ * `formatter` (tsv's format-only build, `oxfmt`), else `full` (the flagship
+ * parse+format builds, `biome`, and the combined `oxc-parser + oxfmt` entry).
+ */
+export const categorize_size_capability = (label: string): SizeCapability => {
+	const has_parse = label.includes('parse');
+	const has_format = label.includes('format') || label.includes('fmt');
+	// a build that does both is a full toolchain (e.g. the combined oxc-parser + oxfmt entry)
+	if (has_parse && has_format) return 'full';
+	if (has_parse) return 'parser'; // tsv parse (ffi), tsv_parse_wasm, oxc-parser
+	if (has_format) return 'formatter'; // tsv format, oxfmt
+	return 'full'; // tsv (napi/ffi), tsv_wasm, biome
+};
+
+export interface SizeDisplayEntry extends BinarySize {
+	bar_fraction: number;
+	category: ImplementationCategory;
+	// a grayed-out, inert placeholder for a build that doesn't exist (e.g. oxfmt's
+	// absent wasm build) — no bar, no size, just the label held in its slot. Absent
+	// on real, measured entries.
+	disabled?: boolean;
+}
+
+export interface SizeCapabilityGroup {
+	capability: SizeCapability;
+	heading: string;
+	// sorted smallest-first, so the leading entry is the default ratio anchor (1.0x)
+	entries: Array<SizeDisplayEntry>;
+}
+
+const SIZE_CAPABILITY_ORDER: ReadonlyArray<{
+	capability: SizeCapability;
+	heading: string;
+}> = [
+	{capability: 'full', heading: 'Full toolchain (parse + format)'},
+	{capability: 'formatter', heading: 'Formatter'},
+	{capability: 'parser', heading: 'Parser'},
+];
+
+/** Display label for the synthesized combined oxc full-toolchain build. */
+export const OXC_FULL_LABEL = 'oxc-parser + oxfmt (napi)';
+
+/** Display label for oxfmt's absent wasm build placeholder — see `derive_size_groups`. */
+export const OXFMT_WASM_LABEL = 'oxfmt (wasm)';
+
+/**
+ * Synthesizes oxc's full-toolchain native build by summing its separately-shipped
+ * parser (`oxc-parser (napi)`) and formatter (`oxfmt (napi)`) packages — together
+ * they're the closest equivalent to tsv's single parse+format build, so the entry
+ * stands beside `tsv (napi)` in the full-toolchain group. Returns `undefined` when
+ * either half is missing (older baselines), and sums gzip only when both carry it.
+ */
+const synthesize_oxc_full = (sizes: Array<BinarySize>): BinarySize | undefined => {
+	const parser = sizes.find((s) => s.label === 'oxc-parser (napi)');
+	const formatter = sizes.find((s) => s.label === 'oxfmt (napi)');
+	if (!parser || !formatter) return undefined;
+	return {
+		label: OXC_FULL_LABEL,
+		bytes: parser.bytes + formatter.bytes,
+		kind: 'native',
+		gzip_bytes:
+			parser.gzip_bytes != null && formatter.gzip_bytes != null
+				? parser.gzip_bytes + formatter.gzip_bytes
+				: null,
+	};
+};
+
+/**
+ * Groups the binary sizes by capability (full / formatter / parser), each group
+ * mixing wasm and native builds sorted smallest-first. Bars scale to the group's
+ * largest build; the `vs` ratio anchors on the group's single smallest build, so
+ * exactly one entry reads 1.0x and every other is a multiple of it. (In the current
+ * data that smallest build is always one of tsv's, so tsv reads 1.0x and the heavier
+ * competitors read >1.0x.) A combined `oxc-parser + oxfmt` entry is
+ * synthesized into the full-toolchain group, since oxc ships parse and format apart.
+ * oxfmt has no wasm build, so the formatter group gets a disabled `oxfmt (wasm)`
+ * placeholder slotted just above its real `oxfmt (napi)` entry, holding the slot
+ * rather than omitting it.
+ */
+export const derive_size_groups = (sizes: Array<BinarySize>): Array<SizeCapabilityGroup> => {
+	const oxc_full = synthesize_oxc_full(sizes);
+	const all_sizes = oxc_full ? [...sizes, oxc_full] : sizes;
+	const groups: Array<SizeCapabilityGroup> = [];
+	for (const {capability, heading} of SIZE_CAPABILITY_ORDER) {
+		const items = all_sizes.filter((s) => categorize_size_capability(s.label) === capability);
+		if (items.length === 0) continue;
+		const sorted = items.toSorted((a, b) => a.bytes - b.bytes);
+		const max = Math.max(0, ...items.map((s) => s.bytes));
+		// `sorted` is ascending, so the smallest build leads the group — its single
+		// default ratio anchor (1.0x), one baseline whether or not the group mixes wasm
+		// and native (rather than the confusing pair a per-kind anchor produced). The
+		// shared component reads every ratio from that leading row.
+		const entries: Array<SizeDisplayEntry> = sorted.map((s) => ({
+			...s,
+			bar_fraction: max > 0 ? s.bytes / max : 0,
+			category: categorize_size(s.label),
+		}));
+		if (capability === 'formatter' && !entries.some((e) => e.label === OXFMT_WASM_LABEL)) {
+			const native_index = entries.findIndex((e) => e.label === 'oxfmt (napi)');
+			const placeholder: SizeDisplayEntry = {
+				label: OXFMT_WASM_LABEL,
+				bytes: 0,
+				kind: 'wasm',
+				gzip_bytes: null,
+				bar_fraction: 0,
+				category: categorize_size(OXFMT_WASM_LABEL),
+				disabled: true,
+			};
+			entries.splice(native_index === -1 ? entries.length : native_index, 0, placeholder);
+		}
+		groups.push({capability, heading, entries});
+	}
+	return groups;
+};
+
+// Cross-runtime combined report (the bench composer's `report.json`, `kind: 'combined'`)
+
+export type BenchmarkRuntime = 'deno' | 'node' | 'bun';
+
+export interface CrossRuntimeRow {
+	group: string;
+	name: string;
+	ops_per_second: Partial<Record<BenchmarkRuntime, number>>;
+	mean_ns: Partial<Record<BenchmarkRuntime, number>>;
+	files_iterated: Partial<Record<BenchmarkRuntime, number | null>>;
+}
+
+export interface CrossRuntimeReport {
+	version: number;
+	kind: 'combined';
+	generated: string;
+	runtimes: Array<BenchmarkRuntime>;
+	// The sibling reports came from different commits/versions — ratios are
+	// unreliable until every runtime is re-run. Present from combined
+	// `version` 6 on.
+	mixed_vintage?: boolean;
+	// The sibling reports were produced on different hardware — ratios are not
+	// comparable. Present from combined `version` 7 on.
+	mixed_machine?: boolean;
+	sources: Array<{
+		runtime: BenchmarkRuntime;
+		timestamp: string;
+		git_commit: string | null;
+		tsv: string | null;
+		// The producing box's machine block; present from combined `version` 7 on.
+		machine?: Machine | null;
+	}>;
+	rows: Array<CrossRuntimeRow>;
+}
+
+export interface CrossRuntimeDisplayRow {
+	name: string;
+	category: ImplementationCategory;
+	ops_per_second: Partial<Record<BenchmarkRuntime, number>>;
+	// ratio of each runtime vs the base (first present) runtime; `> 1` = faster
+	ratio_vs_base: Partial<Record<BenchmarkRuntime, number>>;
+}
+
+export interface CrossRuntimeGroup {
+	group: string;
+	operation: string;
+	language: string;
+	rows: Array<CrossRuntimeDisplayRow>;
+}
+
+// The combined report stores runtimes deno-first (matching the bench's
+// `report.md`); the site presents them node-first (the flagship N-API runtime),
+// then deno, then bun.
+const CROSS_RUNTIME_DISPLAY_ORDER: Array<BenchmarkRuntime> = ['node', 'deno', 'bun'];
+
+/**
+ * The report's runtimes in the site's display order — node (the flagship, the
+ * ratio anchor) first, then deno, then bun. Shared by `derive_cross_runtime_groups`
+ * and the table headers so the anchor can't drift between them.
+ */
+export const order_cross_runtime_runtimes = (
+	runtimes: Array<BenchmarkRuntime>,
+): Array<BenchmarkRuntime> => CROSS_RUNTIME_DISPLAY_ORDER.filter((r) => runtimes.includes(r));
+
+/** One runtime's own version string (`node 24.14.1`), for the cross-runtime section. */
+export interface RuntimeVersion {
+	runtime: BenchmarkRuntime;
+	version: string;
+}
+
+/**
+ * The per-runtime version strings from a cross-runtime report, in the site's
+ * display order (node first). Drops any runtime whose source carries no machine
+ * block (reports predating combined `version` 7). The cross-runtime section
+ * renders these so the three-runtime tables disclose which node/deno/bun version
+ * each column was measured under; the environment panel above stays scoped to the
+ * flagship Node baseline. The shared hardware identity (CPU/OS/arch) isn't
+ * repeated here — it lives in the environment panel, and a per-runtime hardware
+ * mismatch is the report's `mixed_machine` flag's concern.
+ */
+export const derive_runtime_versions = (report: CrossRuntimeReport): Array<RuntimeVersion> => {
+	const by_runtime = new Map(report.sources.map((source) => [source.runtime, source]));
+	const result: Array<RuntimeVersion> = [];
+	for (const runtime of order_cross_runtime_runtimes(report.runtimes)) {
+		const version = by_runtime.get(runtime)?.machine?.runtime_version;
+		if (version) result.push({runtime, version});
+	}
+	return result;
+};
+
+/**
+ * Groups the combined report's rows by benchmark group, in the same display
+ * order as `derive_benchmark_groups` (format before parse, then svelte /
+ * typescript / css). The ratio base is the first runtime in display order
+ * (node when present — the flagship N-API path), regardless of the report's
+ * own deno-first storage order.
+ */
+export const derive_cross_runtime_groups = (
+	report: CrossRuntimeReport,
+): Array<CrossRuntimeGroup> => {
+	const runtimes = order_cross_runtime_runtimes(report.runtimes);
+	const base = runtimes[0];
+	const grouped: Map<string, Array<CrossRuntimeDisplayRow>> = new Map();
+	for (const row of report.rows) {
+		let rows = grouped.get(row.group);
+		if (!rows) {
+			rows = [];
+			grouped.set(row.group, rows);
+		}
+		const base_ops = base ? row.ops_per_second[base] : undefined;
+		const ratio_vs_base: Partial<Record<BenchmarkRuntime, number>> = {};
+		for (const runtime of runtimes) {
+			const ops = row.ops_per_second[runtime];
+			if (ops != null && base_ops != null && base_ops > 0) {
+				ratio_vs_base[runtime] = ops / base_ops;
+			}
+		}
+		rows.push({
+			name: row.name,
+			category: categorize_name(row.name),
+			ops_per_second: row.ops_per_second,
+			ratio_vs_base,
+		});
+	}
+
+	const result: Array<CrossRuntimeGroup> = [];
+	for (const [group, rows] of grouped) {
+		const [operation, language] = group.split('/');
+		result.push({group, operation: operation!, language: language!, rows});
+	}
+	result.sort(
+		(a, b) =>
+			(OPERATION_ORDER[a.operation] ?? 9) - (OPERATION_ORDER[b.operation] ?? 9) ||
+			(LANGUAGE_ORDER[a.language] ?? 9) - (LANGUAGE_ORDER[b.language] ?? 9),
+	);
+	return result;
+};
+
 // Formatting utilities
 
 export interface FormattedUnit {
@@ -261,15 +744,92 @@ export const format_bytes = (bytes: number): FormattedUnit => {
 };
 
 /**
- * Formats per-implementation corpus coverage as `processed/total`, or
- * `undefined` when either value is missing (older baselines without coverage).
+ * Formats a corpus source's file count as a per-language breakdown
+ * (`124 typescript, 15 svelte, 31 css`), largest language first and dropping
+ * zero-count languages. Falls back to the plain `N files` total when the report
+ * predates the per-language split (or lists no recognized language).
+ */
+export const format_corpus_source_files = (source: CorpusSource): string => {
+	const total = `${source.files.toLocaleString('en-US')} files`;
+	if (!source.by_language) return total;
+	const parts = Object.entries(source.by_language)
+		.filter((entry): entry is [string, number] => (entry[1] ?? 0) > 0)
+		.sort((a, b) => b[1] - a[1])
+		.map(([language, count]) => `${count.toLocaleString('en-US')} ${language}`);
+	return parts.length > 0 ? parts.join(', ') : total;
+};
+
+// Corpus source repos (site-owned path → URL mapping)
+
+export interface CorpusRepo {
+	// public repo URL the entry links to
+	url: string;
+	// `org/name`, derived from the URL — the linkified display label
+	label: string;
+}
+
+/**
+ * Maps a corpus source's on-disk path to its public repo URL. The bench records
+ * only local paths (`../zzz/src`), so the site owns this mapping — the links then
+ * survive an `update-benchmarks` refresh without touching the copied JSON. Keyed by
+ * the repo's directory prefix, each ending in a slash so siblings like `../fuz_css/`
+ * and `../fuz_code/`, and `../svelte/` vs `../svelte.dev/`, stay distinct. A source
+ * matching no prefix — the derived `svelte_styles` CSS cache, which isn't a single
+ * repo — is dropped from the repos list rather than shown unlinked.
  */
-export const format_coverage = (
-	processed: number | null | undefined,
-	total: number | null | undefined,
-): string | undefined => {
-	if (processed == null || total == null) return undefined;
-	return `${processed}/${total}`;
+const CORPUS_REPO_URL_BY_PREFIX: ReadonlyArray<readonly [string, string]> = [
+	['../zzz/', 'https://github.com/fuzdev/zzz'],
+	['../fuz_app/', 'https://github.com/fuzdev/fuz_app'],
+	['../fuz_blog/', 'https://github.com/fuzdev/fuz_blog'],
+	['../fuz_code/', 'https://github.com/fuzdev/fuz_code'],
+	['../fuz_css/', 'https://github.com/fuzdev/fuz_css'],
+	['../fuz_docs/', 'https://github.com/fuzdev/fuz_docs'],
+	['../fuz_gitops/', 'https://github.com/fuzdev/fuz_gitops'],
+	['../fuz_mastodon/', 'https://github.com/fuzdev/fuz_mastodon'],
+	['../fuz_template/', 'https://github.com/fuzdev/fuz_template'],
+	['../fuz_ui/', 'https://github.com/fuzdev/fuz_ui'],
+	['../fuz_util/', 'https://github.com/fuzdev/fuz_util'],
+	['../mdz/', 'https://github.com/fuzdev/mdz'],
+	['../gro/', 'https://github.com/fuzdev/gro'],
+	['../svelte-docinfo/', 'https://github.com/fuzdev/svelte-docinfo'],
+	['../tsv.fuz.dev/', 'https://github.com/fuzdev/tsv.fuz.dev'],
+	['../ryanatkn.com/', 'https://github.com/ryanatkn/ryanatkn.com'],
+	['../webdevladder.net/', 'https://github.com/ryanatkn/webdevladder.net'],
+	['../kit/', 'https://github.com/sveltejs/kit'],
+	['../svelte.dev/', 'https://github.com/sveltejs/svelte.dev'],
+	['../svelte/', 'https://github.com/sveltejs/svelte'],
+];
+
+/** The repo URL for a corpus source path, or `undefined` when it maps to no repo. */
+const corpus_repo_url = (path: string): string | undefined =>
+	CORPUS_REPO_URL_BY_PREFIX.find(([prefix]) => path.startsWith(prefix))?.[1];
+
+/** `org/name` from a `https://github.com/org/name` URL — the linkified label. */
+const corpus_repo_label = (url: string): string => new URL(url).pathname.slice(1);
+
+/**
+ * The distinct source repos behind a report's corpus, one entry per URL in
+ * first-seen order (the author's ecosystem leads, the upstream framework repos
+ * trail, matching the source order). Sources sharing a repo (svelte.dev's several
+ * packages) collapse to one entry; sources with no mapped repo (the `svelte_styles`
+ * CSS cache) are dropped. URLs come from the site-owned `CORPUS_REPO_URL_BY_PREFIX`,
+ * not the report, so the links survive a refresh.
+ */
+export const derive_corpus_repos = (
+	sources: Array<CorpusSource> | undefined,
+): Array<CorpusRepo> => {
+	const by_url: Map<string, CorpusRepo> = new Map();
+	for (const source of sources ?? []) {
+		// Prefer the report's git-detected repo; fall back to the legacy prefix
+		// map for reports predating `version` 8 (which lack `source.repo`).
+		const url = source.repo?.url ?? corpus_repo_url(source.path);
+		if (!url || by_url.has(url)) continue;
+		by_url.set(url, {
+			url,
+			label: source.repo?.slug ?? corpus_repo_label(url),
+		});
+	}
+	return [...by_url.values()];
 };
 
 /**
@@ -287,10 +847,55 @@ export const format_gzip_size = (gzip_bytes: number | null | undefined): string
 export const format_speedup = (ratio: number): string =>
 	ratio >= 10 ? `${ratio.toFixed(1)}x` : `${ratio.toFixed(2)}x`;
 
+/**
+ * Signed speedup: entries at or above the anchor read as a plain multiple
+ * (`2.50x`), while slower entries show the reciprocal negated (`0.15x` → `-6.67x`)
+ * so "how many times slower" is directly legible instead of a fraction the reader
+ * has to invert. The minus is a convention for "times slower", not a literal
+ * negative rate. Used for the format/parse speed bars, where entries span widely
+ * on both sides of the anchor; the near-parity cross-runtime table and the
+ * bigger-is-worse size ratios stay on the plain fractional `format_speedup`.
+ */
+export const format_speedup_signed = (ratio: number): string => {
+	const magnitude = ratio >= 1 ? ratio : 1 / ratio;
+	const digits = magnitude >= 10 ? 1 : 2;
+	return `${ratio < 1 ? '-' : ''}${magnitude.toFixed(digits)}x`;
+};
+
 /** Hyphenated tool names that should preserve their hyphens in display labels. */
 const HYPHENATED_NAMES = ['acorn-typescript', 'oxc-parser'];
 
+/**
+ * Display labels for the raw benchmark entry names in the main (Node) tables,
+ * annotating each with the runtime **and** binding it runs under — the native
+ * builds load the N-API addon under Node, so they read `(node napi)` to
+ * distinguish them from the Deno FFI numbers the cross-runtime table surfaces
+ * (`tsv (deno ffi)`); the third-party wasm builds are marked `(wasm)`. Mirrors
+ * the parenthesized suffixes the binary-size section's labels already carry.
+ * tsv's own wasm entries keep their `tsv_wasm` package-name style, as in the size
+ * groups, so they aren't listed here. The already-parenthesized size labels
+ * aren't keys, so they fall through to the generic formatting below unchanged.
+ * The cross-runtime table neutralizes the `(node napi)` suffix per row (its
+ * columns span runtimes) via `format_cross_runtime_label`.
+ */
+const LABEL_OVERRIDES: Record<string, string> = {
+	tsv: 'tsv (node napi)',
+	'tsv-json': 'tsv json (node napi)',
+	// `no-locs` (not `no-locations`) — the full word eats too much column width.
+	'tsv-json-no-locations': 'tsv json no-locs (node napi)',
+	// the one tsv_wasm entry listed here: the generic formatting below would
+	// break the `no-locs` hyphen its native sibling deliberately keeps
+	'tsv_wasm-json-no-locations': 'tsv_wasm json no-locs',
+	'tsv-internal': 'tsv internal (node napi)',
+	'oxc-parser': 'oxc-parser (node napi)',
+	oxfmt: 'oxfmt (node napi)',
+	'biome-wasm': 'biome (wasm)',
+	'oxc-parser-wasm': 'oxc-parser (wasm)',
+};
+
 export const format_label = (name: string): string => {
+	const override = LABEL_OVERRIDES[name];
+	if (override) return override;
 	for (const tool of HYPHENATED_NAMES) {
 		if (name.startsWith(tool)) {
 			return tool + name.slice(tool.length).replaceAll('-', ' ');
@@ -299,6 +904,16 @@ export const format_label = (name: string): string => {
 	return name.replaceAll('-', ' ');
 };
 
+/**
+ * The label for a cross-runtime row. Each row spans node/deno/bun columns, and a
+ * native build's binding is runtime-specific (N-API on node & bun, C-FFI on
+ * deno), so the row can't pin one binding — neutralize `format_label`'s
+ * node-centric `(node napi)` suffix to `(native)`. The per-runtime binding is
+ * disclosed once in the table caption instead (see `BenchmarksCrossRuntime`).
+ */
+export const format_cross_runtime_label = (name: string): string =>
+	format_label(name).replace(' (node napi)', ' (native)');
+
 /** Returns a CSS background color variable for a category. */
 export const category_color = (category: ImplementationCategory): string => {
 	switch (category) {
@@ -319,11 +934,17 @@ export const category_color = (category: ImplementationCategory): string => {
 	}
 };
 
-/** Returns a CSS color variable for a size ratio (inverted — bigger is worse). */
+/**
+ * Returns a CSS color variable for a size ratio (inverted — bigger is worse).
+ * Green is reserved for builds smaller than the baseline (ratio < 1, only reachable
+ * once a hover re-baselines onto a larger build); any build at or above the baseline
+ * reads yellow at the floor, ramping through orange to red as it grows.
+ */
 export const size_ratio_color = (ratio: number): string => {
-	if (ratio < 2) return 'var(--color_b_50)'; // green — similar
-	if (ratio < 5) return 'var(--color_e_50)'; // yellow — notably larger
-	return 'var(--color_c_50)'; // red — much larger
+	if (ratio < 1) return 'var(--color_b_50)'; // green — smaller than baseline
+	if (ratio < 3) return 'var(--color_e_50)'; // yellow — larger
+	if (ratio < 10) return 'var(--color_h_50)'; // orange — much larger
+	return 'var(--color_c_50)'; // red — enormous
 };
 
 /** Returns a CSS color variable for the speedup ratio. */
@@ -334,3 +955,73 @@ export const speedup_color = (ratio: number): string => {
 	if (ratio < 5) return 'var(--color_b_50)'; // green — fast
 	return 'var(--color_j_50)'; // teal — exceptional
 };
+
+/**
+ * Cross-runtime ratio cell background: a stable fuz_css red (`color_c`) / green
+ * (`color_b`) whose ALPHA varies with distance from parity. Fully transparent at ratio
+ * `1.0` (parity recedes), ramping to `0.3` alpha at ratio `0.8` and below (red) or `1.2`
+ * and above (green). The hue stays constant — only opacity moves — so it reads
+ * consistently in light and dark themes while the cell's text keeps the default color.
+ * Deliberately its own scale — NOT the shared `speedup_color` — because cross-runtime
+ * deltas cluster tightly near 1.0 and this must not bleed into the other displays.
+ */
+export const cross_runtime_ratio_background = (ratio: number): string => {
+	// 0 alpha at ratio 1.0, up to 0.3 at ratio ≤ 0.8 (red) or ≥ 1.2 (green)
+	const alpha = Math.min(1, Math.abs(ratio - 1) / 0.2) * 0.3;
+	const color = ratio < 1 ? 'var(--color_c_50)' : 'var(--color_b_50)';
+	return `color-mix(in srgb, ${color} ${(alpha * 100).toFixed(1)}%, transparent)`;
+};
+
+// Interactive baseline (hover-to-rebaseline)
+
+/**
+ * Which way a group's ratio runs, so re-anchoring on hover stays consistent. A
+ * `speed` group (format/parse) reads its anchor as a reference speed — faster
+ * entries are positive multiples, slower ones negative (`format_speedup_signed` /
+ * `speedup_color`). A `size` group reads its anchor as a reference size — bigger
+ * builds are multiples ≥ 1 (`format_size_ratio` / `size_ratio_color`). The two
+ * ratios are reciprocals, which is exactly why one direction flag suffices.
+ */
+export type BaselineDirection = 'speed' | 'size';
+
+/** An entry's ratio against its group's anchor, in the group's direction. */
+export const compute_baseline_ratio = (
+	direction: BaselineDirection,
+	entry_raw: number,
+	anchor_raw: number,
+): number => (direction === 'speed' ? anchor_raw / entry_raw : entry_raw / anchor_raw);
+
+/** Plain size ratio (`2.3x`) — its own formatter since sizes never take the signed treatment. */
+export const format_size_ratio = (ratio: number): string => `${ratio.toFixed(1)}x`;
+
+/** Formats a baseline ratio for display in the given direction. */
+export const format_baseline_ratio = (direction: BaselineDirection, ratio: number): string =>
+	direction === 'speed' ? format_speedup_signed(ratio) : format_size_ratio(ratio);
+
+/** Color for a baseline ratio in the given direction. */
+export const baseline_ratio_color = (direction: BaselineDirection, ratio: number): string =>
+	direction === 'speed' ? speedup_color(ratio) : size_ratio_color(ratio);
+
+/**
+ * A normalized row for `BenchmarksBaselineGroup` — the shared hover-to-rebaseline
+ * column behind the format, parse, and binary-size groups. `raw` is the number the
+ * ratio derives from (sweep mean ns for speed, bytes for size); `value` is the
+ * row's displayed measurement (the whole-sweep mean — total time over the group's
+ * iterated corpus — for speed, bytes for size). Flattening the group-specific
+ * display entries to this one shape lets a single component own the anchor state
+ * for all three sections.
+ */
+export interface BaselineRow {
+	// stable identity for `#each` and anchor matching (the entry name / size label)
+	key: string;
+	// raw name/label; `BenchmarksBar` formats it for display
+	label: string;
+	category: ImplementationCategory;
+	bar_fraction: number;
+	value: FormattedUnit;
+	// the number the ratio derives from — mean ns (speed) or bytes (size)
+	raw: number;
+	annotation: string | undefined;
+	// grayed-out, inert placeholder — never an anchor, no hover highlight
+	disabled: boolean;
+}
diff --git a/src/routes/docs/benchmarks/benchmarks.json b/src/routes/docs/benchmarks/benchmarks.json
index bf56417..eefd677 100644
--- a/src/routes/docs/benchmarks/benchmarks.json
+++ b/src/routes/docs/benchmarks/benchmarks.json
@@ -1,685 +1,1162 @@
 {
-	"version": 4,
-	"timestamp": "2026-06-12T09:22:00.588Z",
-	"git_commit": "98918f9",
+	"version": 7,
+	"runtime": "node",
+	"corpus_kind": "perf",
+	"timestamp": "2026-07-16T11:43:29.034Z",
+	"git_commit": "135b7b93",
+	"machine": {
+		"cpu_model": "AMD Ryzen 5 PRO 7530U with Radeon Graphics",
+		"os": "linux",
+		"arch": "x86_64",
+		"runtime_version": "24.14.1"
+	},
 	"corpus": {
-		"svelte": 1240,
-		"typescript": 4025,
-		"css": 193
+		"svelte": 763,
+		"typescript": 2437,
+		"css": 49
 	},
+	"corpus_sources": [
+		{
+			"path": "../zzz/src",
+			"files": 326,
+			"by_language": {
+				"svelte": 173,
+				"typescript": 152,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/zzz",
+				"slug": "fuzdev/zzz",
+				"commit": "838d499c7cc746ebe1f5da8470e7679c8895aee0",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_app/src",
+			"files": 665,
+			"by_language": {
+				"svelte": 33,
+				"typescript": 631,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_app",
+				"slug": "fuzdev/fuz_app",
+				"commit": "a0e63a732b979df8dd7ae6730548227cca4bc79c",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_blog/src",
+			"files": 37,
+			"by_language": {
+				"svelte": 20,
+				"typescript": 16,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_blog",
+				"slug": "fuzdev/fuz_blog",
+				"commit": "7147f354fac7dcb535f70f241db1dd3543c0a370",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_code/src",
+			"files": 66,
+			"by_language": {
+				"svelte": 17,
+				"typescript": 46,
+				"css": 3
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_code",
+				"slug": "fuzdev/fuz_code",
+				"commit": "7b3664851737def05ac8d4b646b27643cfb4a39f",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_css/src",
+			"files": 146,
+			"by_language": {
+				"svelte": 39,
+				"typescript": 105,
+				"css": 2
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_css",
+				"slug": "fuzdev/fuz_css",
+				"commit": "b0b02e804d3db586c37851754401e3f57b449345",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_docs/src",
+			"files": 65,
+			"by_language": {
+				"svelte": 45,
+				"typescript": 19,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_docs",
+				"slug": "fuzdev/fuz_docs",
+				"commit": "40b3d2ad892d4434088f6da83e54f7cbf69615e0",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_gitops/src",
+			"files": 99,
+			"by_language": {
+				"svelte": 28,
+				"typescript": 70,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_gitops",
+				"slug": "fuzdev/fuz_gitops",
+				"commit": "6d1a90269e16559259d7660ba1b7b119da5967ac",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_mastodon/src",
+			"files": 25,
+			"by_language": {
+				"svelte": 15,
+				"typescript": 9,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_mastodon",
+				"slug": "fuzdev/fuz_mastodon",
+				"commit": "6179d626e50dd1a53540a074fc23c354c2985321",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_template/src",
+			"files": 16,
+			"by_language": {
+				"svelte": 10,
+				"typescript": 5,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_template",
+				"slug": "fuzdev/fuz_template",
+				"commit": "c5c0c0332b811c983d4e60031452f668d163d28d",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_ui/src",
+			"files": 216,
+			"by_language": {
+				"svelte": 121,
+				"typescript": 95,
+				"css": 0
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+			"runtime": "node"
 		},
 		{
 			"name": "biome-wasm",
 			"group": "format/typescript",
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 		},
 		{
 			"name": "svelte/compiler",
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+			"runtime": "node"
 		},
 		{
 			"name": "tsv-json",
 			"group": "parse/css",
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+			"runtime": "node"
 		},
 		{
 			"name": "tsv_wasm-json",
 			"group": "parse/css",
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-			"files_iterated": 159
+			"mean_ns": 18287059.184549358,
+			"p50_ns": 18176678,
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+			"sample_size": 233,
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+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv-internal",
 			"group": "parse/css",
-			"mean_ns": 23123759.831578948,
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-			"files_total": 193,
-			"files_iterated": 159
+			"mean_ns": 3426007.1822466613,
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+			"sample_size": 1273,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv_wasm-internal",
 			"group": "parse/css",
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-			"sample_size": 133,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 159
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+			"p50_ns": 4899160,
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+			"std_dev_ns": 24113.319974338137,
+			"cv": 0.004917680132755866,
+			"ops_per_second": 203.9404004919006,
+			"sample_size": 803,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "prettier",
 			"group": "format/css",
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-			"sample_size": 7,
-			"files_processed": 192,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 551732011.6,
+			"p50_ns": 548811461,
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+			"cv": 0.019537996550994773,
+			"ops_per_second": 1.8124741341363197,
+			"sample_size": 10,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv",
 			"group": "format/css",
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-			"sample_size": 113,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 7032221.678899082,
+			"p50_ns": 7009244,
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+			"std_dev_ns": 72742.76588589282,
+			"cv": 0.010344208303922657,
+			"ops_per_second": 142.20257063292027,
+			"sample_size": 654,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv_wasm",
 			"group": "format/css",
-			"mean_ns": 56842907.02898551,
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-			"sample_size": 69,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 165
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+			"p50_ns": 10110156,
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+			"min_ns": 9975082,
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+			"std_dev_ns": 120001.65250816409,
+			"cv": 0.011812644604735035,
+			"ops_per_second": 98.43734946842822,
+			"sample_size": 483,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "oxfmt",
 			"group": "format/css",
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-			"files_iterated": 165
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+			"p50_ns": 18067378,
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+			"std_dev_ns": 587884.7092626577,
+			"cv": 0.03249591561656505,
+			"ops_per_second": 55.27600072694931,
+			"sample_size": 272,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		},
 		{
 			"name": "biome-wasm",
 			"group": "format/css",
-			"mean_ns": 207351523.875,
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-			"cv": 0.004326108610950857,
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-			"sample_size": 24,
-			"files_processed": 193,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 126426328.38461539,
+			"p50_ns": 126839392,
+			"p75_ns": 138513503.5,
+			"p90_ns": 193632761,
+			"p95_ns": 202020801.25,
+			"p99_ns": 208481402.25,
+			"min_ns": 124102387,
+			"max_ns": 209127749,
+			"std_dev_ns": 1965652.0770388045,
+			"cv": 0.0155478063956653,
+			"ops_per_second": 7.9097448512290125,
+			"sample_size": 26,
+			"files_processed": 49,
+			"files_total": 49,
+			"files_iterated": 49,
+			"runtime": "node"
 		}
 	],
-	"suppressed_noise": {
-		"oxfmt::textToDoc": 1,
-		"panicked at crates/biome_rowan": 1
-	}
+	"suppressed_noise": {},
+	"variant_parity": []
 }
diff --git a/src/routes/docs/benchmarks/benchmarks_cli.ts b/src/routes/docs/benchmarks/benchmarks_cli.ts
new file mode 100644
index 0000000..25f7834
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_cli.ts
@@ -0,0 +1,84 @@
+// A snapshot of the independent end-to-end CLI benchmark — a fork of Oxc's official
+// `bench-formatter` that adds tsv on its `tsv` branch
+// (https://github.com/ryanatkn/oxc-bench-formatter, forked from
+// https://github.com/oxc-project/bench-formatter — the fork's `main` tracks
+// upstream and carries neither tsv nor this analysis, so links target `tsv`).
+// Unlike the
+// in-process, single-threaded numbers elsewhere on this page, it measures the
+// WHOLE CLI: process spawn, file discovery, I/O, and each tool's default
+// multi-file parallelism. tsv, oxfmt, and biome parallelize across files while
+// prettier is effectively serial, so the wall-clock ratios scale with core count
+// and are machine-dependent — the parallelism-neutral view is CPU work (hyperfine
+// `User` time). tsv runs only in the two JSX-free scenarios (it has no JSX/TSX
+// parser). Hand-copied from the linked report; regenerate there with
+// `pnpm run update-readme`, then update the numbers below.
+
+export const BENCHMARKS_CLI_SOURCE_URL = 'https://github.com/ryanatkn/oxc-bench-formatter';
+export const BENCHMARKS_CLI_UPSTREAM_URL = 'https://github.com/oxc-project/bench-formatter';
+
+export interface CliFormatterResult {
+	/** Display label; `tsv` is the reference row every ratio is computed against. */
+	label: string;
+	/** hyperfine wall-clock mean, in milliseconds — what you experience typing the command. */
+	wall_ms: number;
+	/** hyperfine `User` time (total CPU across all threads), in ms — the parallelism-neutral view. */
+	cpu_ms: number;
+	/** Peak resident set size (RSS), in megabytes. */
+	memory_mb: number;
+}
+
+export interface CliScenario {
+	key: string;
+	heading: string;
+	/** One-line description of the corpus and what makes the comparison fair. */
+	description: string;
+	/** Whether every formatter is effectively single-threaded here (one input file). */
+	single_threaded: boolean;
+	/** Results as measured; the component sorts and computes tsv-relative ratios. */
+	results: Array<CliFormatterResult>;
+}
+
+export interface BenchmarksCliReport {
+	source_url: string;
+	upstream_url: string;
+	machine: string;
+	versions: {prettier: string; biome: string; oxfmt: string; tsv: string};
+	scenarios: Array<CliScenario>;
+}
+
+export const benchmarks_cli: BenchmarksCliReport = {
+	source_url: BENCHMARKS_CLI_SOURCE_URL,
+	upstream_url: BENCHMARKS_CLI_UPSTREAM_URL,
+	machine: 'AMD Ryzen 5 PRO 7530U · 12 threads · linux x64',
+	versions: {prettier: '3.9.1', biome: '2.5.1', oxfmt: '0.59.0', tsv: '0.2.0'},
+	scenarios: [
+		{
+			key: 'ts-repo',
+			heading: 'TypeScript repo (Outline, non-JSX subset)',
+			description:
+				"Outline's .ts/.js/.mjs files — the common set every formatter supports, each scoped to it, with a preflight parse check confirming none reject anything. The fair way to put tsv on a real multi-file repo.",
+			single_threaded: false,
+			results: [
+				{label: 'tsv', wall_ms: 120.3, cpu_ms: 854.8, memory_mb: 45.2},
+				{label: 'oxfmt', wall_ms: 379.8, cpu_ms: 1826.7, memory_mb: 215.6},
+				{label: 'biome', wall_ms: 784.3, cpu_ms: 7285.0, memory_mb: 135.7},
+				{label: 'prettier + oxc-parser', wall_ms: 8979, cpu_ms: 11237, memory_mb: 331.4},
+				{label: 'prettier', wall_ms: 10911, cpu_ms: 17611, memory_mb: 447.5},
+			],
+		},
+		{
+			key: 'large-single-file',
+			heading: 'Large single file (TypeScript compiler parser.ts, ~540KB)',
+			description:
+				'One ~13.7K-line .ts file. With a single input every formatter is effectively single-threaded, so wall-clock is close to an engine comparison here — except oxfmt, which spins up a worker pool it cannot use, inflating its CPU time.',
+			single_threaded: true,
+			results: [
+				{label: 'tsv', wall_ms: 28.8, cpu_ms: 15.2, memory_mb: 23.1},
+				{label: 'biome', wall_ms: 138.8, cpu_ms: 107.3, memory_mb: 102.6},
+				{label: 'oxfmt', wall_ms: 236.9, cpu_ms: 456.8, memory_mb: 118.0},
+				{label: 'prettier + oxc-parser', wall_ms: 503.4, cpu_ms: 751.3, memory_mb: 184.4},
+				{label: 'prettier', wall_ms: 1597, cpu_ms: 1583, memory_mb: 303.2},
+			],
+		},
+	],
+};
diff --git a/src/routes/docs/benchmarks/benchmarks_conformance.json b/src/routes/docs/benchmarks/benchmarks_conformance.json
new file mode 100644
index 0000000..f95e3ca
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_conformance.json
@@ -0,0 +1,643 @@
+{
+	"version": 7,
+	"runtime": "node",
+	"corpus_kind": "conformance",
+	"timestamp": "2026-07-16T11:52:16.141Z",
+	"git_commit": "135b7b93",
+	"machine": {
+		"cpu_model": "AMD Ryzen 5 PRO 7530U with Radeon Graphics",
+		"os": "linux",
+		"arch": "x86_64",
+		"runtime_version": "24.14.1"
+	},
+	"corpus": {
+		"svelte": 4539,
+		"typescript": 44224,
+		"css": 22641
+	},
+	"corpus_sources": [
+		{
+			"path": "../prettier-plugin-svelte/test",
+			"files": 318,
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diff --git a/src/routes/docs/benchmarks/benchmarks_conformance.ts b/src/routes/docs/benchmarks/benchmarks_conformance.ts
new file mode 100644
index 0000000..6aee0cd
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_conformance.ts
@@ -0,0 +1,5 @@
+import type {BenchmarkBaseline} from './benchmark_data.ts';
+
+import json from './benchmarks_conformance.json' with {type: 'json'};
+
+export const benchmarks_conformance_json: BenchmarkBaseline = json as BenchmarkBaseline;
diff --git a/src/routes/docs/benchmarks/benchmarks_cross_runtime.json b/src/routes/docs/benchmarks/benchmarks_cross_runtime.json
new file mode 100644
index 0000000..ca995eb
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_cross_runtime.json
@@ -0,0 +1,724 @@
+{
+	"version": 7,
+	"kind": "combined",
+	"generated": "2026-07-16T11:51:31.514Z",
+	"runtimes": [
+		"deno",
+		"node",
+		"bun"
+	],
+	"mixed_vintage": false,
+	"mixed_machine": false,
+	"sources": [
+		{
+			"runtime": "deno",
+			"timestamp": "2026-07-16T11:34:23.572Z",
+			"git_commit": "135b7b93",
+			"tsv": "0.1.0",
+			"machine": {
+				"cpu_model": "AMD Ryzen 5 PRO 7530U with Radeon Graphics",
+				"os": "linux",
+				"arch": "x86_64",
+				"runtime_version": "2.8.3"
+			}
+		},
+		{
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+			"mean_ns": {
+				"deno": 17744412.26785714,
+				"node": 18091033.845588237,
+				"bun": 21077959.92857143
+			},
+			"files_iterated": {
+				"deno": 49,
+				"node": 49,
+				"bun": 49
+			}
+		},
+		{
+			"group": "format/css",
+			"name": "biome-wasm",
+			"ops_per_second": {
+				"deno": 10.267159807066765,
+				"node": 7.9097448512290125
+			},
+			"mean_ns": {
+				"deno": 97397919.07317074,
+				"node": 126426328.38461539
+			},
+			"files_iterated": {
+				"deno": 49,
+				"node": 49
+			}
+		}
+	]
+}
diff --git a/src/routes/docs/benchmarks/benchmarks_cross_runtime.ts b/src/routes/docs/benchmarks/benchmarks_cross_runtime.ts
new file mode 100644
index 0000000..00d2a45
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_cross_runtime.ts
@@ -0,0 +1,5 @@
+import type {CrossRuntimeReport} from './benchmark_data.ts';
+
+import json from './benchmarks_cross_runtime.json' with {type: 'json'};
+
+export const benchmarks_cross_runtime_json: CrossRuntimeReport = json as CrossRuntimeReport;
diff --git a/src/routes/docs/introduction/+page.svelte b/src/routes/docs/introduction/+page.svelte
index dfefa5f..478eab2 100644
--- a/src/routes/docs/introduction/+page.svelte
+++ b/src/routes/docs/introduction/+page.svelte
@@ -47,10 +47,9 @@ reconstruct_locations(ast, 'const x = 1;');`;
 		</p>
 		<p>
 			Compared to Oxc, Biome, and SWC, tsv is a set of focused tools, not a generic language
-			platform, so the focus is web standards and there's no support for JSX/SCSS/etc, beyond Svelte
-			as the only JS framework. The extensibility story is currently limited to using its Rust
-			crates as libraries; bridging to JS or WASM plugins is an open question, but may not be
-			supported.
+			platform, so the focus is Web standards + Svelte and there's no support for JSX/SCSS/etc. The
+			extensibility story is currently limited to using its Rust crates as libraries (or forking);
+			bridging to JS or WASM plugins is an open question (leaning against).
 		</p>
 		<p>tsv prioritizes, in order:</p>
 		<ol>
@@ -60,12 +59,11 @@ reconstruct_locations(ast, 'const x = 1;');`;
 			<li>extensibility (valued but deprioritized)</li>
 		</ol>
 		<p>
-			See the <a href="https://tsv.fuz.dev/docs/benchmarks">benchmarks</a> for stats. Compared to Oxc
-			and Biome, tsv is significantly faster, smaller, and uses less memory to parse and format its supported
-			languages
+			See the <TomeLink slug="benchmarks" /> for stats. Compared to Oxc and Biome, tsv is faster,
+			smaller, and uses less memory to parse and format its supported languages.
 		</p>
 		<p>
-			This is an early release, and reports and feedback are appreciated - see the
+			This is an early release, and reports and feedback are appreciated — see the
 			<a href="https://github.com/fuzdev/tsv/issues">issues</a> and
 			<a href="https://github.com/fuzdev/tsv/discussions">discussions</a>.
 		</p>
@@ -95,7 +93,7 @@ reconstruct_locations(ast, 'const x = 1;');`;
 				See the <TomeLink slug="benchmarks" /> for size and performance details.
 			</p>
 			<p>
-				Native builds are not yet available but are coming in v0.2, see
+				Native builds are not yet published — follow
 				<a href="https://github.com/fuzdev/tsv/issues/139">issue 139</a>.
 			</p>
 		</TomeSection>
@@ -120,14 +118,14 @@ reconstruct_locations(ast, 'const x = 1;');`;
 				For TypeScript and Svelte, the parsers also emit a span-only AST that drops the per-node
 				<code>loc</code> (line/column) object — Svelte also drops <code>name_loc</code> — for a ~46%
 				smaller, faster-to-materialize result, mirroring acorn's <code>locations: false</code>. Line
-				and column stay derivable from the <code>start</code>/<code>end</code> offsets plus your source,
-				so nothing is lost when you have the source.
+				and column stay derivable from the <code>start</code>/<code>end</code> offsets plus your
+				source, so nothing is lost when you have the source.
 			</p>
 			<Code lang="ts" content={no_locations_example} />
 			<p>
 				<code>reconstruct_locations(ast, source)</code> walks the tree and adds <code>loc</code>
-				back, mutating in place — exact for TypeScript, approximate for Svelte (it skips the parser's
-				own
+				back, mutating in place — exact for TypeScript, approximate for Svelte (it skips the
+				parser's own
 				<code>name_loc</code> and a couple of position quirks). For sparse lookups,
 				<code>create_locator(source)</code> reuses one line table across calls. CSS has no
 				<code>loc</code>, so there's no span-only variant for it.
@@ -137,11 +135,12 @@ reconstruct_locations(ast, 'const x = 1;');`;
 			<TomeSectionHeader text="Source code" />
 			<ul>
 				<li>
-					<a href="https://github.com/fuzdev/tsv">github.com/fuzdev/tsv</a> - the formatter, parser, wasm
-					bindings, CLI, etc
+					<a href="https://github.com/fuzdev/tsv">github.com/fuzdev/tsv</a> — the formatter, parser,
+					wasm bindings, CLI, etc
 				</li>
 				<li>
-					<a href="https://github.com/fuzdev/tsv.fuz.dev">github.com/fuzdev/tsv.fuz.dev</a> - this website
+					<a href="https://github.com/fuzdev/tsv.fuz.dev">github.com/fuzdev/tsv.fuz.dev</a> — this
+					website
 				</li>
 			</ul>
 		</TomeSection>
diff --git a/src/routes/docs/playground/+page.svelte b/src/routes/docs/playground/+page.svelte
index f9c38ed..5f1af8b 100644
--- a/src/routes/docs/playground/+page.svelte
+++ b/src/routes/docs/playground/+page.svelte
@@ -10,7 +10,7 @@
 	const tome = tome_get_by_slug('playground');
 
 	// The `/docs` index renders every tome's component via `DocsContent`, which would
-	// mount `Playground` and pull in its ~900KB WASM. Guard like fuz_css's api tome:
+	// mount `Playground` and pull in its ~900KB-gzipped WASM. Guard like fuz_css's api tome:
 	// show only a link at the root, the full playground at `/docs/playground`.
 	const at_root = $derived(page.url.pathname === DOCS_PATH);
 </script>
@@ -31,7 +31,8 @@
 			<p>
 				See the <TomeLink slug="introduction" /> for setup and API usage. The textarea above uses
 				<a href="https://code.fuz.dev/">fuz_code</a>'s
-				<a href="https://code.fuz.dev/docs/api/CodeTextarea.svelte"><code>CodeTextarea</code></a> component.
+				<a href="https://code.fuz.dev/docs/api/CodeTextarea.svelte"><code>CodeTextarea</code></a
+				> component.
 			</p>
 		</section>
 	{/if}
diff --git a/src/routes/docs/playground/Playground.svelte b/src/routes/docs/playground/Playground.svelte
index ba20a09..ca2825b 100644
--- a/src/routes/docs/playground/Playground.svelte
+++ b/src/routes/docs/playground/Playground.svelte
@@ -6,12 +6,13 @@
 	import Code from '@fuzdev/fuz_code/Code.svelte';
 	import CodeTextarea from '@fuzdev/fuz_code/CodeTextarea.svelte';
 	import {supports_css_highlight_api} from '@fuzdev/fuz_code/highlight_manager.ts';
+	import CopyToClipboard from '@fuzdev/fuz_ui/CopyToClipboard.svelte';
 	import {to_error_message} from '@fuzdev/fuz_util/error.ts';
 
 	import {playground_example} from './playground_example.ts';
 
 	// `@fuzdev/tsv_wasm` is loaded lazily, in the browser only — a dynamic import
-	// so the ~900KB WASM lands in its own chunk, fetched the first time this
+	// so the ~900KB-gzipped WASM lands in its own chunk, fetched the first time this
 	// component mounts and never pulled into `/docs` or the prerendered HTML.
 	let tsv: typeof import('@fuzdev/tsv_wasm') | null = $state(null);
 	let load_error: string | null = $state(null);
@@ -72,6 +73,8 @@
 		};
 	});
 
+	const is_base = $derived(source === playground_example);
+
 	const reset = (): void => {
 		source = playground_example;
 	};
@@ -84,8 +87,8 @@
 	};
 </script>
 
-<header class="row">
-	<button type="button" class="plain" onclick={reset} disabled={!ready}>reset</button>
+<header class="row mb_xs">
+	<button type="button" class="plain" onclick={reset} disabled={!ready || is_base}>reset</button>
 	<button type="button" class="plain" onclick={format} disabled={!ready || error !== null}>
 		format
 	</button>
@@ -112,7 +115,10 @@
 		<p>formatted</p>
 		<Code lang="svelte" content={formatted?.value ?? ''} />
 		<p>AST</p>
-		<Code lang="json" content={ast?.value ?? ''} class="ast" />
+		<div class="ast_output">
+			<CopyToClipboard text={ast?.value ?? ''} class="ast_copy" />
+			<Code lang="json" content={ast?.value ?? ''} class="ast" />
+		</div>
 	{/if}
 </section>
 
@@ -132,6 +138,24 @@
 	section :global(.ast) {
 		max-height: 500px;
 	}
+	/* float a copy button over the AST pane's top-right corner; it stays pinned as
+	   the pane scrolls since it's absolute to this wrapper, not inside the scroller */
+	.ast_output {
+		position: relative;
+	}
+	.ast_output :global(.ast_copy) {
+		--font_size: var(--font_size_lg);
+		position: absolute;
+		top: var(--space_xs);
+		/* clear the pane's scrollbar */
+		right: var(--space_md);
+		z-index: 1;
+		background: var(--shade_00);
+	}
+	/* TODO hacky */
+	.ast_output :global(.ast_copy > div) {
+		width: auto !important;
+	}
 	.error {
 		color: var(--color_e_40);
 		white-space: pre-wrap;
diff --git a/src/test/benchmark_data.test.ts b/src/test/benchmark_data.test.ts
index 0f6e8d0..e55cc03 100644
--- a/src/test/benchmark_data.test.ts
+++ b/src/test/benchmark_data.test.ts
@@ -1,9 +1,23 @@
 import {assert, describe, test} from 'vitest';
 
 import {benchmarks_json} from '$routes/docs/benchmarks/benchmarks.ts';
+import {benchmarks_conformance_json} from '$routes/docs/benchmarks/benchmarks_conformance.ts';
+import {benchmarks_cross_runtime_json} from '$routes/docs/benchmarks/benchmarks_cross_runtime.ts';
+import {benchmarks_cli} from '$routes/docs/benchmarks/benchmarks_cli.ts';
 import {
+	categorize_size_capability,
+	compute_baseline_ratio,
 	derive_benchmark_groups,
+	derive_conformance_groups,
+	derive_corpus_repos,
+	derive_cross_runtime_groups,
+	derive_size_groups,
 	derive_speedup_summary,
+	format_coverage_percent,
+	format_speedup_signed,
+	order_cross_runtime_runtimes,
+	OXC_FULL_LABEL,
+	OXFMT_WASM_LABEL,
 } from '$routes/docs/benchmarks/benchmark_data.ts';
 
 // Shape gate for the committed benchmarks.json: the bench report format drifts
@@ -12,13 +26,14 @@ import {
 // When `npm run update-benchmarks` pulls in a new shape, these fail loudly.
 describe('benchmarks.json shape', () => {
 	test('baseline version is current', () => {
-		assert.isAtLeast(benchmarks_json.version, 4);
+		// version 5 is the first per-runtime report shape (carries `runtime`)
+		assert.isAtLeast(benchmarks_json.version, 5);
 	});
 
-	test('binary sizes include the ratio anchors', () => {
+	test('binary sizes include the flagship tsv builds', () => {
 		const labels = benchmarks_json.binary_sizes.map((s) => s.label);
-		assert.include(labels, 'tsv (native)'); // native anchor
-		assert.include(labels, 'tsv_wasm'); // wasm anchor (the full build)
+		assert.include(labels, 'tsv (napi)'); // flagship N-API build (perf report anchor)
+		assert.include(labels, 'tsv_wasm'); // the full wasm build — smallest full-toolchain, size baseline
 	});
 
 	test('versions carries the keys the meta component renders', () => {
@@ -35,13 +50,105 @@ describe('benchmarks.json shape', () => {
 		}
 	});
 
-	test('every group derives a canonical entry and a timed-set count', () => {
+	test('every group leads with its canonical entry (the default anchor) and a timed-set count', () => {
 		const groups = derive_benchmark_groups(benchmarks_json);
 		assert.isAtLeast(groups.length, 6); // format+parse × svelte/typescript/css
 		for (const group of groups) {
 			const key = `${group.operation}/${group.language}`;
 			assert.ok(group.canonical_entry, `${key} has no canonical entry`);
+			// the canonical reference sorts first, so it's the default 1.0x anchor the
+			// shared component reads off the leading row
+			assert.strictEqual(group.entries[0]?.category, 'canonical', `${key} canonical leads`);
 			assert.isNotNull(group.files_iterated, `${key} has no files_iterated`);
+			for (const entry of group.entries) {
+				if (entry.disabled) continue;
+				// measured entries render the whole-sweep mean (total corpus time); a
+				// zero would misread as an instantaneous run
+				assert.isAbove(entry.mean_ns, 0, `${key}/${entry.name} has no mean`);
+			}
+		}
+	});
+
+	test('svelte/css parse groups get disabled oxc placeholders, typescript keeps real ones', () => {
+		const groups = derive_benchmark_groups(benchmarks_json);
+		const parse = (language: string) =>
+			groups.find((g) => g.operation === 'parse' && g.language === language);
+
+		// typescript actually runs oxc-parser — its oxc entries are real, not placeholders
+		const ts = parse('typescript');
+		const ts_oxc = ts?.entries.filter((e) => e.category === 'oxc') ?? [];
+		assert.isNotEmpty(ts_oxc);
+		for (const e of ts_oxc) assert.isNotOk(e.disabled, `${e.name} should be a real entry`);
+
+		// svelte and css mirror those oxc entries in, disabled, in the same fixed slot:
+		// directly after the biome placeholder (both lead the cross-tool comparisons,
+		// right after the canonical row) and before tsv's json wires
+		for (const language of ['svelte', 'css']) {
+			const group = parse(language);
+			assert.ok(group, `${language} parse group missing`);
+			const oxc = group.entries.filter((e) => e.category === 'oxc');
+			assert.strictEqual(oxc.length, ts_oxc.length, `${language} oxc placeholder count`);
+			for (const e of oxc) {
+				assert.ok(e.disabled, `${language} ${e.name} should be disabled`);
+				assert.strictEqual(e.bar_fraction, 0, `${language} ${e.name} bar`);
+			}
+			const names = group.entries.map((e) => e.name);
+			const first_biome = names.findIndex((n) => n.includes('biome'));
+			const first_oxc = names.findIndex((n) => n.includes('oxc'));
+			const first_json = names.findIndex((n) => n.endsWith('-json') || n.endsWith('-no-locations'));
+			assert.strictEqual(first_oxc, first_biome + 1, `${language} oxc directly after biome`);
+			assert.isBelow(first_oxc, first_json, `${language} oxc before the tsv json entries`);
+		}
+	});
+
+	test('every parse group gets a disabled biome placeholder, since biome never exposes a parser to JS', () => {
+		const groups = derive_benchmark_groups(benchmarks_json);
+		for (const language of ['svelte', 'typescript', 'css']) {
+			const group = groups.find((g) => g.operation === 'parse' && g.language === language);
+			assert.ok(group, `${language} parse group missing`);
+			const biome = group.entries.filter((e) => e.category === 'biome');
+			assert.strictEqual(biome.length, 1, `${language} biome placeholder count`);
+			const [entry] = biome;
+			assert.ok(entry, `${language} biome entry missing`);
+			assert.ok(entry.disabled, `${language} biome entry should be disabled`);
+			assert.strictEqual(entry.bar_fraction, 0, `${language} biome bar`);
+
+			// biome leads the cross-tool comparisons: directly after the single canonical
+			// row (index 0), before tsv's json wires
+			const names = group.entries.map((e) => e.name);
+			const first_biome = names.findIndex((n) => n.includes('biome'));
+			const first_json = names.findIndex((n) => n.endsWith('-json') || n.endsWith('-no-locations'));
+			assert.strictEqual(first_biome, 1, `${language} biome directly after the canonical row`);
+			assert.isBelow(first_biome, first_json, `${language} biome before the tsv json entries`);
+		}
+	});
+
+	test('format/parse rows follow the fixed canonical → biome → oxc → json → internal order', () => {
+		// independently mirrors the requested row order so a regression in the
+		// derivation's comparator fails here
+		const tier = (name: string, category: string): number => {
+			if (category === 'canonical') return 0;
+			if (category === 'biome') return 1;
+			if (category === 'oxc') return 2;
+			if (name.endsWith('-no-locations')) return 3; // tsv json, span-only wire
+			if (name.endsWith('-json')) return 4; // tsv json, loc-carrying wire
+			return 5; // tsv internal engine
+		};
+		for (const group of derive_benchmark_groups(benchmarks_json)) {
+			const key = `${group.operation}/${group.language}`;
+			const tiers = group.entries.map((e) => tier(e.name, e.category));
+			assert.deepEqual(
+				tiers,
+				[...tiers].toSorted((a, b) => a - b),
+				`${key} tier order`,
+			);
+			// wasm precedes native within a tier
+			for (let i = 1; i < group.entries.length; i++) {
+				if (tiers[i] !== tiers[i - 1]) continue;
+				const prev_wasm = group.entries[i - 1]!.name.includes('wasm');
+				const curr_wasm = group.entries[i]!.name.includes('wasm');
+				assert.isFalse(!prev_wasm && curr_wasm, `${key} native precedes wasm within a tier`);
+			}
 		}
 	});
 
@@ -54,4 +161,289 @@ describe('benchmarks.json shape', () => {
 			assert.isDefined(row.format_css, row.variant);
 		}
 	});
+
+	test('binary sizes group by capability with one smallest-build ratio anchor', () => {
+		const groups = derive_size_groups(benchmarks_json.binary_sizes);
+		// full / formatter / parser, in that order, all present in the current data
+		assert.deepStrictEqual(
+			groups.map((g) => g.capability),
+			['full', 'formatter', 'parser'],
+		);
+		for (const group of groups) {
+			assert.isNotEmpty(group.entries);
+			// every entry lands in the group its capability names
+			for (const e of group.entries) {
+				assert.strictEqual(categorize_size_capability(e.label), group.capability);
+			}
+			// the group's default ratio anchor (its 1.0x row) is the single smallest real
+			// build, and it leads the group — the shared component reads every ratio off
+			// the first row. Disabled placeholders (e.g. oxfmt's absent wasm build) never
+			// sort first.
+			const real = group.entries.filter((e) => !e.disabled);
+			const smallest = real.reduce((a, b) => (a.bytes <= b.bytes ? a : b));
+			assert.strictEqual(
+				group.entries[0]?.label,
+				smallest.label,
+				`${group.capability} smallest leads`,
+			);
+		}
+		// the parser group pits tsv against oxc-parser in both kinds
+		const parser = groups.find((g) => g.capability === 'parser');
+		const parser_labels = parser?.entries.map((e) => e.label) ?? [];
+		assert.include(parser_labels, 'oxc-parser (wasm)');
+		assert.include(parser_labels, 'oxc-parser (napi)');
+	});
+
+	test('full toolchain group carries the combined oxc-parser + oxfmt entry', () => {
+		const sizes = benchmarks_json.binary_sizes;
+		const groups = derive_size_groups(sizes);
+		const full = groups.find((g) => g.capability === 'full');
+		const combined = full?.entries.find((e) => e.label === OXC_FULL_LABEL);
+		assert.ok(combined, 'combined oxc entry missing from full toolchain group');
+
+		// its bytes and gzip are the sum of oxc's separate parser and formatter builds
+		const oxc_parser = sizes.find((s) => s.label === 'oxc-parser (napi)');
+		const oxfmt = sizes.find((s) => s.label === 'oxfmt (napi)');
+		assert.ok(oxc_parser && oxfmt, 'source oxc builds missing');
+		assert.strictEqual(combined.bytes, oxc_parser.bytes + oxfmt.bytes);
+		assert.strictEqual(combined.gzip_bytes, oxc_parser.gzip_bytes! + oxfmt.gzip_bytes!);
+
+		// native build, colored as oxc
+		assert.strictEqual(combined.kind, 'native');
+		assert.strictEqual(combined.category, 'oxc');
+	});
+
+	test('formatter group gets a disabled oxfmt (wasm) placeholder just above oxfmt (napi), since oxfmt has no wasm build', () => {
+		const groups = derive_size_groups(benchmarks_json.binary_sizes);
+		const formatter = groups.find((g) => g.capability === 'formatter');
+		assert.ok(formatter, 'formatter group missing');
+
+		const placeholder = formatter.entries.find((e) => e.label === OXFMT_WASM_LABEL);
+		assert.ok(placeholder, 'oxfmt (wasm) placeholder missing');
+		assert.ok(placeholder.disabled, 'oxfmt (wasm) should be disabled');
+		assert.strictEqual(placeholder.kind, 'wasm');
+		assert.strictEqual(placeholder.category, 'oxc');
+		assert.strictEqual(placeholder.bar_fraction, 0);
+
+		const labels = formatter.entries.map((e) => e.label);
+		const placeholder_index = labels.indexOf(OXFMT_WASM_LABEL);
+		const native_index = labels.indexOf('oxfmt (napi)');
+		assert.isAbove(native_index, -1, 'oxfmt (napi) missing from formatter group');
+		assert.strictEqual(
+			placeholder_index,
+			native_index - 1,
+			'placeholder should sit just above oxfmt (napi)',
+		);
+	});
+
+	test('flagship report is the node runtime', () => {
+		// the headline detailed view switched to N-API under Node; guards against an
+		// `update-benchmarks` that pulls the wrong runtime's sibling report
+		assert.strictEqual(benchmarks_json.runtime, 'node');
+	});
+});
+
+// Shape gate for the committed conformance report `benchmarks_conformance.json`
+// (tsv's `report.conformance.node.json` — the parse-coverage surface over the
+// deliberately-hard fixture suites, disjoint from the perf corpus, Svelte set minus
+// canonical-rejects), consumed by the Parse conformance section.
+describe('benchmarks_conformance.json shape', () => {
+	test('report is the conformance surface at the current version', () => {
+		assert.isAtLeast(benchmarks_conformance_json.version, 6);
+		assert.strictEqual(benchmarks_conformance_json.corpus_kind, 'conformance');
+		assert.strictEqual(benchmarks_conformance_json.runtime, 'node');
+	});
+
+	test('conformance report is parse-only', () => {
+		for (const entry of benchmarks_conformance_json.entries) {
+			assert.match(entry.group, /^parse\//, `${entry.group}/${entry.name}`);
+		}
+	});
+
+	test('corpus sources disclose the composition', () => {
+		assert.isNotEmpty(benchmarks_conformance_json.corpus_sources ?? []);
+	});
+
+	test('derives one coverage group per language, each with a tsv row and full coverage data', () => {
+		const groups = derive_conformance_groups(benchmarks_conformance_json);
+		assert.strictEqual(groups.length, 3); // svelte / typescript / css
+		assert.deepEqual(
+			groups.map((g) => g.language),
+			['svelte', 'typescript', 'css'],
+		);
+		for (const group of groups) {
+			assert.ok(
+				group.rows.some((r) => r.name === 'tsv'),
+				`${group.language} has a tsv row`,
+			);
+			// rows are ordered by coverage, highest first
+			const fractions = group.rows.map((r) => r.coverage_fraction);
+			assert.deepEqual(
+				fractions,
+				[...fractions].toSorted((a, b) => b - a),
+				`${group.language} rows descend by coverage`,
+			);
+			for (const row of group.rows) {
+				assert.isAbove(row.files_total, 0, `${group.language}/${row.name} total`);
+				assert.isAtLeast(row.coverage_fraction, 0);
+				assert.isAtMost(row.coverage_fraction, 1);
+				// engine-level rows only — binding/materialization variants are folded
+				assert.notMatch(row.name, /-internal|wasm-|-wasm/, `${group.language}/${row.name}`);
+			}
+		}
+	});
+
+	test('coverage percent floors — only exact totality reads 100%', () => {
+		// 44219/44220 rounds to 100.00% but must not display as it: floor, so a
+		// visibly non-total count never sits beside a "100.00%" label.
+		assert.strictEqual(format_coverage_percent(44_219 / 44_220), '99.99%');
+		assert.strictEqual(format_coverage_percent(1), '100.00%');
+		assert.strictEqual(format_coverage_percent(0.998549), '99.85%');
+		assert.strictEqual(format_coverage_percent(0), '0.00%');
+	});
+});
+
+describe('derive_corpus_repos', () => {
+	test('maps the committed corpus sources to deduped org/name repo links', () => {
+		const repos = derive_corpus_repos(benchmarks_json.corpus_sources);
+		assert.isNotEmpty(repos);
+		// one entry per URL — no repo appears twice even though svelte.dev contributes
+		// several source subpaths
+		const urls = repos.map((r) => r.url);
+		assert.strictEqual(new Set(urls).size, urls.length, 'urls are distinct');
+		const svelte_dev = repos.filter((r) => r.url === 'https://github.com/sveltejs/svelte.dev');
+		assert.strictEqual(svelte_dev.length, 1, 'svelte.dev collapses to one entry');
+		// each label is the linkified `org/name`, derived from (and ending) its URL
+		for (const repo of repos) {
+			assert.match(repo.label, /^[^/]+\/[^/]+$/, repo.url);
+			assert.isTrue(repo.url.endsWith(repo.label), `${repo.url} ends with ${repo.label}`);
+		}
+	});
+
+	test('collapses shared repos and drops sources with no mapped repo', () => {
+		const repos = derive_corpus_repos([
+			{path: '../zzz/src', files: 1},
+			{path: '../svelte.dev/apps/svelte.dev/src', files: 1},
+			{path: '../svelte.dev/packages/repl/src', files: 1}, // same repo → collapsed
+			{path: 'benches/js/.cache/svelte_styles', files: 1}, // not a repo → dropped
+		]);
+		assert.deepStrictEqual(repos, [
+			{url: 'https://github.com/fuzdev/zzz', label: 'fuzdev/zzz'},
+			{
+				url: 'https://github.com/sveltejs/svelte.dev',
+				label: 'sveltejs/svelte.dev',
+			},
+		]);
+	});
+
+	test('handles a missing corpus_sources field', () => {
+		assert.deepStrictEqual(derive_corpus_repos(undefined), []);
+	});
+});
+
+describe('format_speedup_signed', () => {
+	test('anchor-and-faster entries read as a plain multiple', () => {
+		assert.strictEqual(format_speedup_signed(1), '1.00x');
+		assert.strictEqual(format_speedup_signed(2.5), '2.50x');
+		assert.strictEqual(format_speedup_signed(12.3), '12.3x'); // >= 10 drops to one decimal
+	});
+
+	test('slower entries negate the reciprocal so the factor is directly legible', () => {
+		assert.strictEqual(format_speedup_signed(0.15), '-6.67x');
+		assert.strictEqual(format_speedup_signed(0.05), '-20.0x'); // >= 10 magnitude → one decimal
+		assert.strictEqual(format_speedup_signed(0.98), '-1.02x'); // near-parity sign flip
+	});
+});
+
+describe('compute_baseline_ratio', () => {
+	test('speed reads the anchor as the reference — faster entries exceed 1', () => {
+		// anchor 100ns; a 50ns entry is 2x faster, a 200ns entry is half the speed
+		assert.strictEqual(compute_baseline_ratio('speed', 50, 100), 2);
+		assert.strictEqual(compute_baseline_ratio('speed', 200, 100), 0.5);
+	});
+
+	test('size reads the anchor as the reference — bigger entries exceed 1', () => {
+		// anchor 100 bytes; a 300-byte build is 3x bigger, a 50-byte build is half
+		assert.strictEqual(compute_baseline_ratio('size', 300, 100), 3);
+		assert.strictEqual(compute_baseline_ratio('size', 50, 100), 0.5);
+	});
+});
+
+describe('order_cross_runtime_runtimes', () => {
+	test('reorders the report storage order to node-first display order', () => {
+		assert.deepStrictEqual(order_cross_runtime_runtimes(['deno', 'node', 'bun']), [
+			'node',
+			'deno',
+			'bun',
+		]);
+	});
+
+	test('anchors on the next runtime in display order when node is absent', () => {
+		assert.deepStrictEqual(order_cross_runtime_runtimes(['bun', 'deno']), ['deno', 'bun']);
+		assert.deepStrictEqual(order_cross_runtime_runtimes([]), []);
+	});
+});
+
+// Shape gate for the committed cross-runtime `benchmarks_cross_runtime.json` (the
+// bench composer's combined `report.json`) — a different, slimmer shape than the
+// per-runtime baseline, consumed by the Cross-runtime section.
+describe('benchmarks_cross_runtime.json shape', () => {
+	test('combined report carries the current version and kind', () => {
+		assert.isAtLeast(benchmarks_cross_runtime_json.version, 5);
+		assert.strictEqual(benchmarks_cross_runtime_json.kind, 'combined');
+		// the committed fixture must be same-vintage — if this trips, re-run every
+		// runtime and recompose rather than committing a mixed set (the site would
+		// show the unreliable-ratios warning banner)
+		assert.notStrictEqual(benchmarks_cross_runtime_json.mixed_vintage, true);
+	});
+
+	test('runtimes include the flagship and its cross-runtime peers', () => {
+		const {runtimes} = benchmarks_cross_runtime_json;
+		assert.include(runtimes, 'node'); // the flagship the headline view leads with
+		assert.include(runtimes, 'deno');
+		assert.include(runtimes, 'bun');
+	});
+
+	test('every group derives rows with the flagship runtime populated', () => {
+		const groups = derive_cross_runtime_groups(benchmarks_cross_runtime_json);
+		assert.isAtLeast(groups.length, 6); // format+parse × svelte/typescript/css
+		for (const group of groups) {
+			assert.isAbove(group.rows.length, 0, group.group);
+			for (const row of group.rows) {
+				assert.isNumber(row.ops_per_second.node, `${group.group}/${row.name} missing node ops`);
+				// ratios anchor on node (the display-order base, not the report's
+				// deno-first storage order), so node's own ratio is exactly 1
+				assert.strictEqual(row.ratio_vs_base.node, 1, `${group.group}/${row.name} node anchor`);
+			}
+		}
+	});
+});
+
+// Shape gate for the hand-maintained CLI snapshot `benchmarks_cli.ts` (copied from
+// the linked oxc-bench-formatter fork). Unlike the JSON reports it isn't generated,
+// so a bad hand-edit (a scenario missing its `tsv` reference row, a zeroed metric)
+// would silently render an empty table rather than fail to typecheck.
+describe('benchmarks_cli shape', () => {
+	test('every scenario carries a tsv reference row with positive metrics', () => {
+		assert.isAtLeast(benchmarks_cli.scenarios.length, 1);
+		for (const scenario of benchmarks_cli.scenarios) {
+			// BenchmarksCli anchors every ratio on the tsv row; without it the table is empty
+			assert.ok(
+				scenario.results.some((r) => r.label === 'tsv'),
+				`${scenario.key} is missing its tsv row`,
+			);
+			for (const r of scenario.results) {
+				assert.isAbove(r.wall_ms, 0, `${scenario.key}/${r.label} wall_ms`);
+				assert.isAbove(r.cpu_ms, 0, `${scenario.key}/${r.label} cpu_ms`);
+				assert.isAbove(r.memory_mb, 0, `${scenario.key}/${r.label} memory_mb`);
+			}
+		}
+	});
+
+	test('source links point at the fork (on its tsv branch) and its upstream', () => {
+		// the fork's `main` tracks upstream and carries neither tsv nor the analysis,
+		// so every fork link must target the `tsv` branch
+		assert.match(benchmarks_cli.source_url, /ryanatkn\/oxc-bench-formatter\/tree\/tsv$/);
+		assert.match(benchmarks_cli.upstream_url, /oxc-project\/bench-formatter/);
+	});
 });
diff --git a/svelte.config.js b/svelte.config.js
index 1fd7b37..fec5a80 100644
--- a/svelte.config.js
+++ b/svelte.config.js
@@ -16,6 +16,8 @@ export default {
 		paths: {relative: false}, // use root-absolute paths for SSR path comparison: https://svelte.dev/docs/kit/configuration#paths
 		alias: {$routes: 'src/routes'},
 		version: {name: execSync('git rev-parse HEAD').toString().trim()},
-		csp: {directives: create_csp_directives({extend: [csp_directives_of_fuzdev]})},
+		csp: {
+			directives: create_csp_directives({extend: [csp_directives_of_fuzdev]}),
+		},
 	},
 };
diff --git a/tsconfig.json b/tsconfig.json
index 0300902..6e255c0 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,7 +1,9 @@
 {
 	"extends": "./.svelte-kit/tsconfig.json",
 	"compilerOptions": {
-		"types": ["@sveltejs/kit"],
+		"types": [
+			"@sveltejs/kit"
+		],
 		"module": "nodenext",
 		"moduleResolution": "nodenext",
 		"strict": true,