| --- |
| pretty_name: Claude Fable 5 Agent Traces |
| license: cc-by-4.0 |
| language: |
| - en |
| annotations_creators: |
| - machine-generated |
| task_categories: |
| - text-generation |
| size_categories: |
| - 10K<n<100K |
| tags: |
| - "traces" |
| - "code" |
| - "agentic" |
| - "tool-use" |
| - "coding-agent" |
| - "coding-agents" |
| - "agent-traces" |
| - "instruction-following" |
| - "function-calling" |
| - "parallel-tool-calling" |
| - "multi-turn" |
| - "sft" |
| - "distillation" |
| - "reasoning" |
| - "chain-of-thought" |
| - "cot" |
| configs: |
| - config_name: default |
| data_files: |
| - split: train |
| path: |
| - data/train-00000.parquet |
| - data/train-00001.parquet |
| - data/train-00002.parquet |
| - data/train-00003.parquet |
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| - data/train-00254.parquet |
|
|
| --- |
| |
| # Claude Fable 5 Agent Traces |
|
|
|  |
|
|
| <div align="center"> |
| <h2>2,380 TRAJECTORIES · 12,490 TRAINING ROWS · 14 MB PARQUET · 663 MB JSONL</h2> |
| </div> |
|
|
| > Generated by **[moonshiner](https://github.com/greghavens/moonshiner)** — an open harness for |
| > distilling verified instruction-following, tool-use, and agentic coding traces. |
|
|
|
|
| Behavior-preserving **instruction-following, tool-use, and agent trajectories** |
| from **Claude Fable 5** (`anthropic/claude-fable-5`). The category and row-share tables |
| below describe the actual mix seen during training rather than assuming a |
| particular task domain. |
|
|
| **This is an actively growing dataset. More is coming**: additional training |
| programs and substantially more sessions will be added to this same repo. |
|
|
| ## What makes it different |
|
|
| - **All real model trajectories.** Every row is a cumulative prefix of a genuine |
| Claude Fable 5 session captured end-to-end. The agent's causal exploration, tool |
| arguments, results, corrections, and final responses are retained. |
| - **One next step per row.** A trajectory with N assistant turns produces N |
| rows. Row k contains the complete context through assistant turn k; that final |
| assistant message is the sole training target. |
| - **Runtime-normalized.** Runtime plumbing, UI decoration, control sequences, |
| and verbose success boilerplate are removed or canonicalized while causal |
| context remains. |
| - **Independently verified.** Coding sessions must pass deterministic tests and |
| protected-file checks. Instruction-following sessions must pass deterministic |
| tool-call, staging, argument, and response-constraint checks. Every retained |
| trajectory also clears independent review. |
|
|
| - **Reasoning-effort step-down.** Failed trace attempts proceed through `xhigh → medium → low` (up to the configured attempt count) and stop at the first judge-accepted trace. If higher reasoning fails a task that lower reasoning succeeds on, the lower-effort trace is retained. |
|
|
| ## Task mix |
|
|
| High-level training programs, calculated from accepted trajectories using the |
| same program mapping published in the seed catalog: |
|
|
| | kind | trajectories | share | row share | flavor | |
| |---|---:|---:|---:|---| |
| | Tool calling | 694 | 29.2% | 14.2% | Select tools, construct grounded arguments, run independent calls together, and stage dependent calls. | |
| | Instruction following | 559 | 23.5% | 11.5% | Honor constraints, formats, corrections, state, context, memory, relevance, and abstention. | |
| | Building | 312 | 13.1% | 13.6% | Implement complete libraries, services, CLIs, workflows, and systems from specifications. | |
| | Debugging | 280 | 11.8% | 11.4% | Diagnose failures, repair defects, resolve compiler/runtime issues, and preserve regressions. | |
| | Project & integration | 199 | 8.4% | 13.4% | Coordinate multi-file, repository-scale, migration, and integration work. | |
| | Clarification | 101 | 4.2% | 1.5% | Recognize missing information, ask only when required, and never invent parameters. | |
| | Feature development | 81 | 3.4% | 4.8% | Extend working systems while preserving existing behavior. | |
| | Error recovery | 75 | 3.2% | 2.0% | Recover from tool failures, partial results, retries, and idempotency hazards. | |
| | Seed authoring | 49 | 2.1% | 26.2% | Accepted trajectories grouped by their explicit published dataset category. | |
| | Refactoring & performance | 21 | 0.9% | 0.9% | Restructure safely and improve measured performance without behavior drift. | |
| | VMware Cloud Foundation 9.1 | 5 | 0.2% | 0.3% | Catalog program awaiting description. | |
| | Security | 3 | 0.1% | 0.1% | Enforce authorization, resource, path, boundary, and adversarial-input safety in defensive systems and repairs. | |
| | Uncategorized | 1 | 0.0% | 0.1% | Catalog program awaiting description. | |
|
|
| ## Languages (current drop) |
|
|
| `English`, `Python`, `TypeScript`, `Go`, `Java`, `PowerShell`, `C#`, `Rust`, `Bash`, `C`, `C++`, `Ruby`, `Zsh`, `JavaScript`, `Assembly` |
|
|
| ## Schema |
|
|
| Each row: |
|
|
| | column | type | contents | |
| |---|---|---| |
| | `task` | string | stable task id | |
| | `lang` | string | English (`en`) or primary programming language | |
| | `category` | string | detailed recipe category | |
| | `split` | string | trajectory-disjoint `train` or `val` partition | |
| | `assistant_step` | int | 1-based target assistant turn | |
| | `assistant_steps` | int | assistant turns in the source trajectory | |
| | `target_message_index` | int | index of the final assistant target | |
| | `n_messages` | int | cumulative message count through the target | |
| | `messages` | list of objects | cumulative context ending at the target | |
|
|
| `messages` is native JSON. |
|
|
| ## Layout |
|
|
| The Hugging Face viewer reads the validated active Parquet shards listed in `dataset-manifest.json`. The equivalent canonical `traces.jsonl` is also published for direct download and conversion. It currently contains |
| 12,490 cumulative next-step rows derived from 2,380 accepted |
| trajectories over disjoint train and validation tasks. |
|
|
| When training from the cumulative view, supervise only the final assistant |
| message in each row. Supervising every assistant span would repeatedly |
| overweight early steps because those spans recur as context in later prefixes. |
|
|
| ## Intended use |
|
|
| Supervised fine-tuning of instruction-following, tool-calling, and coding |
| agents, plus analysis of multi-step planning, parallel calls, tool selection, |
| state tracking, build-test-fix loops, and verification-driven completion. |
|
|
| ## Provenance |
|
|
| Generated with Claude Fable 5 (`anthropic/claude-fable-5`), then filtered by deterministic verification and |
| explicit Codex acceptance review. Codex supplies no demonstration content; it |
| only judges or requests replacement of candidate traces. Provider credentials, |
| user keys, and host-identifying data are scrubbed before publication. |
|
|
| ## License |
|
|
| [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) — free for training, |
| research, commercial products, modification, redistribution, and inclusion in |
| other datasets or corpora, with attribution. |
|
|
| Suggested attribution: |
|
|
| > Claude Fable 5 Agent Traces — |
| > https://huggingface.co/datasets/greghavens/fable-5-coding-and-debugging-traces |
|
|
