# CTXGAP upstream attribution and licence

Paper: What Coding Agents Leave Unsaid: Measuring Task-State Gaps Between
Execution and Reports, Guoyang Xu, Rui Zhang, Xiuyu Wu and Hao Chen (2026).
https://arxiv.org/abs/2610.20003
Upstream: https://github.com/Kaguraaaaaa/Ctxgap
Fixed revision: 04d8c618238923c1e797b9b154b977091222c1a2
Original licence: https://github.com/Kaguraaaaaa/Ctxgap/blob/04d8c618238923c1e797b9b154b977091222c1a2/LICENSE.txt

The local numerical reproduction follows the upstream scripts/reproduce_all.py
statistical conventions. Changes include bounded retrieval and hash checking,
local statistical organization, immutable result output, and explicit public
observer/scorer interfaces. This notice preserves the upstream MIT terms.

## Original evaluation and reproduction code -- MIT

MIT License

Copyright (c) 2026 The CTXGAP authors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

## Original benchmark data -- CC BY 4.0

The CTXGAP authors' original probes, atoms, units, data/anon numeric tables,
prompts, questions and reference answers are licensed under CC BY 4.0:
https://creativecommons.org/licenses/by/4.0/
https://creativecommons.org/licenses/by/4.0/legalcode

The committed validation artifact is a summary/recomputation of those frozen
numerical tables, with provenance and changes stated above. It is not a new
model capability measurement. This does not relicense third-party source
fragments (including Django, SymPy, pytest or SWE-bench task repositories).
The upstream's permanently withheld 282 probes and 21 atoms are not included
and are not covered by its grant.