Dataset Viewer
The dataset viewer is not available for this split.
Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code: StreamingRowsError
Exception: CastError
Message: Couldn't cast
sessionId: string
mode: string
type: string
message: struct<role: string, content: string, model: string, id: string, type: string, stop_reason: string, (... 342 chars omitted)
child 0, role: string
child 1, content: string
child 2, model: string
child 3, id: string
child 4, type: string
child 5, stop_reason: string
child 6, usage: struct<input_tokens: int64, output_tokens: int64, cache_creation_input_tokens: int64, cache_read_inp (... 234 chars omitted)
child 0, input_tokens: int64
child 1, output_tokens: int64
child 2, cache_creation_input_tokens: int64
child 3, cache_read_input_tokens: int64
child 4, server_tool_use: struct<web_search_requests: int64, web_fetch_requests: int64>
child 0, web_search_requests: int64
child 1, web_fetch_requests: int64
child 5, service_tier: string
child 6, cache_creation: struct<ephemeral_1h_input_tokens: int64, ephemeral_5m_input_tokens: int64>
child 0, ephemeral_1h_input_tokens: int64
child 1, ephemeral_5m_input_tokens: int64
child 7, inference_geo: string
permissionMode: string
aiTitle: string
parentUuid: string
isSidechain: bool
promptId: string
uuid: string
timestamp: string
userType: string
entrypoint: string
cwd: string
version: string
gitBranch: string
toolUseResult: struct<stdout: string, stderr: string, interrupted: bool, isImage: bool, noOutputExpected: bool>
child 0, stdout: string
child 1, stderr: string
child 2, interrupted: bool
child 3, isImage: bool
child 4, noOutputExpected: bool
sourceToolAssistantUUID: string
leafUuid: string
lastPrompt: string
title: string
id: string
licenses: list<item: struct<name: string>>
child 0, item: struct<name: string>
child 0, name: string
description: string
to
{'title': Value('string'), 'id': Value('string'), 'licenses': List({'name': Value('string')}), 'description': Value('string')}
because column names don't match
Traceback: Traceback (most recent call last):
File "/src/services/worker/src/worker/utils.py", line 149, in get_rows_or_raise
return get_rows(
dataset=dataset,
...<4 lines>...
column_names=column_names,
)
File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
return func(*args, **kwargs)
File "/src/services/worker/src/worker/utils.py", line 129, in get_rows
rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
File "/src/services/worker/src/worker/utils.py", line 489, in safe_iter
yield from ds.decode(False) if ds.features else ds
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2818, in __iter__
for key, example in ex_iterable:
^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2355, in __iter__
for key, pa_table in self._iter_arrow():
~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2380, in _iter_arrow
for key, pa_table in self.ex_iterable._iter_arrow():
~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
for key, pa_table in iterator:
^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
for key, pa_table in self.generate_tables_fn(**gen_kwags):
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
self._cast_table(pa_table, json_field_paths=json_field_paths),
~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
pa_table = table_cast(pa_table, self.info.features.arrow_schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2369, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2297, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
sessionId: string
mode: string
type: string
message: struct<role: string, content: string, model: string, id: string, type: string, stop_reason: string, (... 342 chars omitted)
child 0, role: string
child 1, content: string
child 2, model: string
child 3, id: string
child 4, type: string
child 5, stop_reason: string
child 6, usage: struct<input_tokens: int64, output_tokens: int64, cache_creation_input_tokens: int64, cache_read_inp (... 234 chars omitted)
child 0, input_tokens: int64
child 1, output_tokens: int64
child 2, cache_creation_input_tokens: int64
child 3, cache_read_input_tokens: int64
child 4, server_tool_use: struct<web_search_requests: int64, web_fetch_requests: int64>
child 0, web_search_requests: int64
child 1, web_fetch_requests: int64
child 5, service_tier: string
child 6, cache_creation: struct<ephemeral_1h_input_tokens: int64, ephemeral_5m_input_tokens: int64>
child 0, ephemeral_1h_input_tokens: int64
child 1, ephemeral_5m_input_tokens: int64
child 7, inference_geo: string
permissionMode: string
aiTitle: string
parentUuid: string
isSidechain: bool
promptId: string
uuid: string
timestamp: string
userType: string
entrypoint: string
cwd: string
version: string
gitBranch: string
toolUseResult: struct<stdout: string, stderr: string, interrupted: bool, isImage: bool, noOutputExpected: bool>
child 0, stdout: string
child 1, stderr: string
child 2, interrupted: bool
child 3, isImage: bool
child 4, noOutputExpected: bool
sourceToolAssistantUUID: string
leafUuid: string
lastPrompt: string
title: string
id: string
licenses: list<item: struct<name: string>>
child 0, item: struct<name: string>
child 0, name: string
description: string
to
{'title': Value('string'), 'id': Value('string'), 'licenses': List({'name': Value('string')}), 'description': Value('string')}
because column names don't matchNeed help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
Yasha v200 Traces
30,666 Claude Code session traces of full repository builds from scratch across 15 domains and 13 programming languages.
Format
Each file is a JSONL file representing one Claude Code session. Each line is a typed event:
mode/permission-mode/ai-title: Session metadatauser: User prompts and tool resultsassistant: Model responses with thinking blocks, text, and tool_use callslast-prompt: Session end marker
Structure
sessions/
part_0/ - 7,667 sessions
part_1/ - 7,667 sessions
part_2/ - 7,060 sessions
part_3/ - 8,272 sessions
Domains
web, database, cli, ml, security, devops, simulation, blockchain, networking, game, automation, embedded, graphics, compiler, editor
Languages
Go, Python, Rust, TypeScript, JavaScript, Kotlin, C, C++, Elixir, Ruby, Java, Zig, Shell
Trace Lifecycle
Each trace shows the full development cycle: research → code generation → build → debug → test → pass.
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