Reserve the address; data release pending review

README.md

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+---
+license: odc-by
+pretty_name: ACT-2.5B
+language:
+  - en
+  - zh
+size_categories:
+  - 10K<n<100K
+task_categories:
+  - text-generation
+tags:
+  - agents
+  - coding-agent
+  - trajectories
+  - reasoning
+  - real-user-data
+---
+
+# ACT-2.5B
+
+**Data release pending.** This repository reserves the address for the dataset described
+in a paper currently under double-blind review. The files will be uploaded once the
+review is complete. The paper's appendix carries the full datasheet.
+
+## What the dataset will contain
+
+**ACT-2.5B** is a dataset of **26,999 real coding-agent sessions (2.50B tokens)**,
+contributed by developers who authorized their sessions for publication, redacted, and
+released under ODC-BY. Each session records a complete interaction: the system prompt, the
+tool definitions, and the alternating sequence of user messages, assistant messages, tool
+calls, and tool results, spanning six model generations.
+
+What defines the dataset is what it lacks. Across **1.65M assistant turns** it carries only
+**15.3 non-empty reasoning blocks per 100 turns**, and **34% of sessions contain no reasoning
+at all**. The actions are recorded; the reasons are not. A model trained on such data learns
+to imitate what was done rather than work out what to do.
+
+## Collection and consent
+
+Sessions come from developers who accepted a data collection and use authorization before
+contributing. The authorization names public release explicitly among its permitted uses,
+requires contributors to affirm they are at least 18 (or the local age of majority, if
+higher), and commits that no contributor identity is published. Every contributor
+represented here accepted it. The operative clauses are reproduced in the paper's appendix.
+
+## Processing
+
+Credentials and contact details are redacted, and home-directory paths are pseudonymized
+consistently so that path structure survives. Sessions touching repositories in SWE-bench
+Verified are excluded, and near-duplicate sessions are labelled with cluster identifiers
+rather than removed. Every thinking block is labelled by whether it is empty and, where
+determinable, by cause.
+
+## Code
+
+An anonymized mirror of the experiment and synthesis code accompanies the paper under
+review.
+
+## Licence
+
+ODC-BY.