Recover failed Autoloop tsikit-learn branches

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main, "autoloop/**"]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Type check
+        run: bunx tsc --noEmit
+
+      - name: Run tests
+        run: bun test
+
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Lint
+        run: bunx biome check src tests
+
+  playground:
+    name: Build Playground
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Build library bundle
+        run: bun build src/index.ts --outfile playground/tsikit-learn.js --target browser --minify
+
+      - name: Upload playground artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: playground
+          path: playground/
+
+  pages:
+    name: Deploy to GitHub Pages
+    runs-on: ubuntu-latest
+    needs: [test, playground]
+    if: github.ref == 'refs/heads/main'
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Build library bundle
+        run: bun build src/index.ts --outfile playground/tsikit-learn.js --target browser --minify
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: playground/
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

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+node_modules/
+dist/
+coverage/

AGENTS.md

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+# Agent Instructions for tsikit-learn
+
+## Overview
+
+`tsikit-learn` is a TypeScript port of [scikit-learn](https://scikit-learn.org/). The project is being built one feature at a time by the Autoloop agent.
+
+## Stack
+
+- **Runtime & bundler**: Bun
+- **Language**: TypeScript (strictest settings — `strict: true`, `noUncheckedIndexedAccess: true`, `exactOptionalPropertyTypes: true`)
+- **Linting**: Biome
+- **Testing**: Bun test runner with fast-check for property-based tests
+- **Data layer**: `tsb` (TypeScript pandas port) as a peer dependency; typed arrays for numeric computation
+
+## Directory Structure
+
+```
+src/
+  index.ts                — public entry point, re-exports everything
+  exceptions.ts           — NotFittedError, ConvergenceWarning, etc.
+  base.ts                 — BaseEstimator, mixins, clone, check_is_fitted
+  utils/
+    extmath.ts            — math utilities (safeDot, gramMatrix, cholesky, etc.)
+    validation.ts         — input validation
+    multiclass.ts         — multiclass helpers
+    class_weight.ts       — class weight utilities
+    index.ts              — re-exports all utils
+  preprocessing/
+    standard_scaler.ts    — StandardScaler
+    minmax_scaler.ts      — MinMaxScaler
+    label_encoder.ts      — LabelEncoder
+    normalizer.ts         — Normalizer
+    index.ts
+  metrics/
+    regression.ts         — MSE, MAE, R², MAPE, explained_variance
+    classification.ts     — accuracy, confusion_matrix, precision, recall, F1, log_loss
+    index.ts
+  model_selection/
+    split.ts              — train_test_split, KFold, StratifiedKFold
+    index.ts
+  linear_model/
+    linear_regression.ts  — LinearRegression (OLS via Cholesky)
+    ridge.ts              — Ridge (L2 regularization)
+    index.ts
+tests/
+  base.test.ts
+  preprocessing.test.ts
+  metrics_model_selection.test.ts
+  linear_model.test.ts
+playground/
+  index.html              — interactive demos, deployed to GitHub Pages
+```
+
+## TypeScript Conventions
+
+- No `any`, no `@ts-ignore`, no `as` casts (unless provably safe)
+- Use `Float64Array` for continuous numeric data, `Int32Array` for integer labels
+- Use `?? 0` or null checks for `noUncheckedIndexedAccess` compliance
+- Export everything from module `index.ts` files
+
+## Evaluation Metric
+
+The CI evaluation script counts TypeScript source files in `src/` (excluding `index.ts`) that contain `export`. Currently: **15 files**.
+
+## Adding a New Module
+
+1. Create `src/{module}/{feature}.ts` — implement the class with `fit`, `predict`/`transform`, `score`
+2. Create or update `src/{module}/index.ts` — re-export from the new file
+3. Update `src/index.ts` — add `export * from "./{module}/index.js"`
+4. Add tests in `tests/{module}.test.ts`
+5. Add a card to `playground/index.html`
+
+## Running Locally
+
+```bash
+bun install
+bun test
+bunx tsc --noEmit
+```

biome.json

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+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "organizeImports": { "enabled": true },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true
+    }
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space",
+    "indentWidth": 2
+  }
+}

bunfig.toml

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+[test]
+coverage = true

package.json

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+{
+  "name": "tsikit-learn",
+  "version": "0.1.0",
+  "description": "A complete TypeScript port of scikit-learn",
+  "type": "module",
+  "main": "./dist/index.js",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    }
+  },
+  "scripts": {
+    "build": "bun build src/index.ts --outdir dist --target browser",
+    "test": "bun test",
+    "typecheck": "bunx tsc --noEmit",
+    "lint": "bunx biome check src tests"
+  },
+  "devDependencies": {
+    "@biomejs/biome": "^1.9.4",
+    "fast-check": "^3.22.0",
+    "typescript": "^5.7.2"
+  },
+  "peerDependencies": {
+    "tsb": "^0.1.0"
+  },
+  "peerDependenciesMeta": {
+    "tsb": {
+      "optional": true
+    }
+  }
+}