---
pretty_name: CodeLeWM Public Code-Edit Shard
license: other
tags:
- code
- python
- world-model
- code-edit
- research-artifact
---

# CodeLeWM Public Code-Edit Shard

This dataset repository hosts the public-safe CodeLeWM code-edit transition
shards used by the scaled May 2026 CodeLeWM training runs. It is a diagnostic
research artifact, not a benchmark leaderboard dataset and not a source of
broad model-quality claims.

## What Is Hosted Here

| Run family | Path pattern | Role |
| --- | --- | --- |
| Scaled first public run | `runs/codelewm-scaled-20260520-9699b53/pack/**` | scaled code-edit transition pack |
| Action-use margin run | `runs/codelewm-action-use-20260520-6650183/pack/**` | action-use margin experiment data |
| Action-use retrieval run | `runs/codelewm-action-use-retrieval-20260520-7895d18/pack/**` | margin plus retrieval follow-up data |
| v0.2 action-swap/inverse-action run | `runs/codelewm-v0-2-action-swap-rerun-20260520-7c7cb0b/pack/**` | action-contrast remediation data |

Each pack includes manifest-backed metadata used by the CodeLeWM CLI. The
corresponding model checkpoints are in `abdelstark/codelewm-transition-model`,
and result reports are in `abdelstark/codelewm-runs`.

## Dataset Information

The public shard represents Python code-edit transitions extracted for
CodeLeWM. Records are designed for transition-model training and evaluation:
before-state features, action/instruction views, after-state targets, split
metadata, and manifest checksums. The dataset is used by the package-native
training, retrieval, ablation, surprise, scorer-quality, and reranking
diagnostics.

Candidate code and source data are treated as untrusted inputs. CodeLeWM
parsing and scoring paths do not execute candidate patches by default.

## Claim Boundary

The action-use experiments trained from these shards did not establish a
positive action-conditioned model-quality claim. In the documented runs,
no-action controls remained stronger on headline retrieval gates or later
claim gates failed. Use this repository for reproducible negative and
diagnostic evidence, not for claims of broad coding improvement.

## Verification

Download one run pack and verify it locally:

```bash
hf download abdelstark/codelewm-public-shard \
  --repo-type dataset \
  --include 'runs/codelewm-v0-2-action-swap-rerun-20260520-7c7cb0b/pack/**' \
  --local-dir .artifacts/hf-download/codelewm-public-shard

uv run codelewm manifest verify \
  --manifest .artifacts/hf-download/codelewm-public-shard/runs/codelewm-v0-2-action-swap-rerun-20260520-7c7cb0b/pack/manifest.json \
  --json

uv run codelewm secret-scan \
  .artifacts/hf-download/codelewm-public-shard/runs/codelewm-v0-2-action-swap-rerun-20260520-7c7cb0b/pack \
  --json
```

Expected result: manifest verification returns `ok=true` and the secret scan
returns `ok=true` with zero findings.

## Related Repositories

- Model checkpoints: `https://huggingface.co/abdelstark/codelewm-transition-model`
- Current execution dataset: `https://huggingface.co/datasets/abdelstark/codelewm-execution-pack`
- Run artifacts: `https://huggingface.co/datasets/abdelstark/codelewm-runs`
- Code repository: `https://github.com/AbdelStark/CodeLeWM`