---
license: cc-by-4.0
task_categories:
- text-generation
language:
- en
tags:
- agents
- traces
- long-horizon
- benchmark
- agent-observability
pretty_name: tracelab COMPREHEND synthetic corpus
size_categories:
- n<1K
---

# tracelab COMPREHEND synthetic corpus

Twelve seeded synthetic long-horizon agent sessions (JSONL event streams, ~11 MB
total) released with the paper **"Parsing the Stream: A Live Trace Model for
Long-Horizon Agents and Their Observers"** (Pakhomov & Nijkamp, Salesforce AI
Research; arXiv:2609.01466, https://arxiv.org/abs/2609.01466).

- 📄 Paper: https://arxiv.org/abs/2609.01466
- 💻 Code, generator, benchmarks, and traces (BSD-3-Clause): https://github.com/SalesforceAIResearch/tracelab
- 🤗 Dataset: this repository (CC-BY-4.0)

Each file is one session in the Claude Code JSONL trace format: tool calls and
results, errors, file touches, and session metadata, generated to be
distributionally realistic (tool-heavy, error-carrying) while containing no real
data. The corpus backs the paper's auditable COMPREHEND replication: monitoring
questions are generated mechanically from ledger ground truth, and the corpus
**regenerates byte-identically** from seeds 201–212 with the released generator (https://github.com/SalesforceAIResearch/tracelab):

```
python -m tracelab.bench.synth_corpus --seeds 201-212
```

Code, benchmark harnesses, and all workbench traces: see the tracelab repository
(https://github.com/SalesforceAIResearch/tracelab). Ground truth for turns, top tool, files, and latest ask is computed by
the generator independently of the parsing pipeline (zero mismatches across all
twelve sessions).

Data license: CC-BY-4.0 (the generator code is BSD-3-Clause; the corpus regenerates byte-identically from it).

## Citation

```bibtex
@article{pakhomov2026parsing,
  title={Parsing the Stream: A Live Trace Model for Long-Horizon Agents and Their Observers},
  author={Pakhomov, Egor and Nijkamp, Erik},
  journal={arXiv preprint arXiv:2609.01466},
  year={2026}
}
```