[Autoloop] [Autoloop: build-tsb-pandas-typescript-migration] Steering

[github-actions]

🤖 Autoloop — steering issue for the build-tsb-pandas-typescript-migration program.

Links

• Branch: autoloop/build-tsb-pandas-typescript-migration
• Pull Request: (being created — see PR labeled [Autoloop: build-tsb-pandas-typescript-migration])
• State File: build-tsb-pandas-typescript-migration.md
• Experiment Log: [Autoloop] [Autoloop: build-tsb-pandas-typescript-migration] Experiment Log 2026-04 #104

Program

Goal: Build tsb — a complete TypeScript port of pandas, one feature at a time
Metric: pandas_features_ported (higher is better)
Current best: 32
Iterations: 194

Steering

Add comments below to steer the agent. The agent reads this issue and the state file before each iteration.

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🤖 Autoloop — steering issue for the build-tsb-pandas-typescript-migration program.

Links

• Branch: autoloop/build-tsb-pandas-typescript-migration
• Pull Request: [Autoloop] [Autoloop: build-tsb-pandas-typescript-migration] #111
• State File: build-tsb-pandas-typescript-migration.md
• Experiment Log: [Autoloop: build-tsb-pandas-typescript-migration] Experiment Log 2026-04 #3

Program

Goal: Build tsb — a complete TypeScript port of pandas, one feature at a time.
Metric: pandas_features_ported (higher is better)
Current best: 42
Iterations: 206

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[github-actions]

�� Iteration 194 accepted — Run

• Feature: core/astype.ts — astypeSeries(), astype(), castScalar()
• Metric: 32 (was 31, Δ+1)
• Commit: 5a5e20a on branch autoloop/build-tsb-pandas-typescript-migration

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[github-actions]

🤖 Iteration 195 — ✅ Accepted

• Change: Add stats/replace.ts — value substitution for Series and DataFrame
• Metric: 33 (best: 33, delta: +1)
• Commit: de6aeea
• Result: Successfully implemented scalar, array (many→one, pair-wise), Record, and Map replacement specs. 27 tests pass. Playground page added.

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[github-actions]

🤖 Iteration 196 accepted — Run

Added where/mask — conditional value selection for Series and DataFrame.

• whereSeries, maskSeries, whereDataFrame, maskDataFrame
• Supports: boolean[], Series, DataFrame (aligned by label), 2-D arrays, callable (element-wise)
• 33 tests (unit + property-based with fast-check)
• Playground: where_mask.html

Commit: 3a85852 · Metric: 34 (was 33, +1)

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[github-actions]

🤖 Iteration 197 accepted — diff / shift

• Change: Add diffSeries, diffDataFrame, shiftSeries, shiftDataFrame — discrete difference and value shifting for Series and DataFrame with axis support.
• Metric: 35 (previous best: 34, delta: +1)
• Commit: fc137cc (branch: autoloop/build-tsb-pandas-typescript-migration)
• Run: §24283807306

Also: canonical PR created for autoloop/build-tsb-pandas-typescript-migration.

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[github-actions]

🤖 Iteration 199 accepted — Run

• Commit: e629a2e (PR [Autoloop] [Autoloop: build-tsb-pandas-typescript-migration] #111)
• Added: stats/duplicated.ts (duplicated/drop_duplicates) + core/sample.ts (random sampling)
• Metric: 37 (+1 from 36)

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[github-actions]

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Warning

The push_to_pull_request_branch operation failed: Pull request number is required but not found. The code changes were not applied.

🤖 Iteration 200 — ✅ Accepted

• Change: Add stats/clip_advanced.ts — clipAdvancedSeries, clipAdvancedDataFrame. Per-element bounds (scalar, Series, DataFrame). 32 tests. Playground page.
• Metric: 38 (previous best: 36, delta: +2)
• Commit: e0f8724
• Run: §24285870280

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[github-actions]

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Warning

The push_to_pull_request_branch operation failed: Pull request number is required but not found. The code changes were not applied.

🤖 Iteration 201 accepted — Run

Added stats/apply.ts implementing all four pandas apply/map variants: applySeries, applyDataFrame, applyExpandDataFrame, mapDataFrame. Metric: 37 → 38. Commit: 2cc43c3.

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[github-actions]

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Warning

The push_to_pull_request_branch operation failed: Failed to apply patch. The code changes were not applied.

🤖 Iteration 202 accepted — Run

Commit cead131: Add stats/clip_advanced.ts (clipAdvancedSeries, clipAdvancedDataFrame). Metric: 38. Also wired up index exports for all previously-added modules.

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[github-actions]

🤖 Iteration 203 accepted — metric 39 (prev best 38, +1)

Re-implemented clip_advanced.ts and apply.ts (both previously lost from iters 200-201). Canonical branch autoloop/build-tsb-pandas-typescript-migration created with 39 feature files.

Commit: 073d74b | Run

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[github-actions]

🤖 Iteration 204 accepted — Run

Added stats/cut.ts — cut()/qcut() binning functions.

• Metric: pandas_features_ported = 40 (delta: +1)
• Commit: 7dac470 on autoloop/build-tsb-pandas-typescript-migration

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[github-actions]

🤖 Iteration 205 accepted (Run) — commit e58b620 on autoloop/build-tsb-pandas-typescript-migration. Added Interval/IntervalIndex/intervalRange. Metric: 41 (+1).

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[github-actions]

🤖 Iteration 206 accepted — Run

Added stats/get_dummies.ts: one-hot encoding for pandas pd.get_dummies / pd.from_dummies. Metric: 42 (+1). Commit: f5a69ab on autoloop/build-tsb-pandas-typescript-migration.

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[github-actions]

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Warning

The push_to_pull_request_branch operation failed: Pull request number is required but not found. The code changes were not applied.

🤖 Iteration 207 — ✅ Accepted

• Change: Add stats/crosstab.ts — crosstab + crosstabSeries (cross-tabulation, normalization, margins)
• Metric: 43 (+1 from 42)
• Commit: dacdb21 on autoloop/build-tsb-pandas-typescript-migration-531c0338e43e4af9
• Run: https://github.com/githubnext/tsessebe/actions/runs/24289641935

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