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Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
timestamp: string
info: struct<git_commit: string, num_trials: int64, max_steps: int64, max_errors: int64, user_info: struct (... 545 chars omitted)
  child 0, git_commit: string
  child 1, num_trials: int64
  child 2, max_steps: int64
  child 3, max_errors: int64
  child 4, user_info: struct<implementation: string, llm: string, llm_args: struct<temperature: double>, global_simulation (... 64 chars omitted)
      child 0, implementation: string
      child 1, llm: string
      child 2, llm_args: struct<temperature: double>
          child 0, temperature: double
      child 3, global_simulation_guidelines: string
      child 4, voice_settings: null
      child 5, persona_config: null
  child 5, agent_info: struct<implementation: string, llm: string, llm_args: struct<temperature: double>, voice_settings: n (... 4 chars omitted)
      child 0, implementation: string
      child 1, llm: string
      child 2, llm_args: struct<temperature: double>
          child 0, temperature: double
      child 3, voice_settings: null
  child 6, environment_info: struct<domain_name: string, policy: string, tool_defs: null>
      child 0, domain_name: string
      child 1, policy: string
      child 2, tool_defs: null
  child 7, seed: int64
  child 8, text_streaming_config: struct<chunk_by: string, chunk_size: int64>
      child 0, chunk_by: string
      child 1, chunk_size: int64
  child 9, speech_complexity: null
  child 10, audio_native_config: null
  child 11, retrieval_config: null
  child 1
...
1, omitted_questions: bool
      child 2, details: string
contact_info: struct<email: string, name: string, github: string>
  child 0, email: string
  child 1, name: string
  child 2, github: string
results: struct<retail: struct<pass_1: double, cost: double>, airline: struct<pass_1: double, cost: double>,  (... 129 chars omitted)
  child 0, retail: struct<pass_1: double, cost: double>
      child 0, pass_1: double
      child 1, cost: double
  child 1, airline: struct<pass_1: double, cost: double>
      child 0, pass_1: double
      child 1, cost: double
  child 2, telecom: struct<pass_1: double, cost: double>
      child 0, pass_1: double
      child 1, cost: double
  child 3, banking_knowledge: struct<pass_1: double, cost: double, retrieval_config: string>
      child 0, pass_1: double
      child 1, cost: double
      child 2, retrieval_config: string
submitting_organization: string
submission_date: timestamp[s]
trajectories_available: bool
submission_type: string
model_name: string
modality: string
trajectory_files: struct<airline: string, banking_knowledge: string, retail: string, telecom: string>
  child 0, airline: string
  child 1, banking_knowledge: string
  child 2, retail: string
  child 3, telecom: string
references: list<item: struct<title: string, url: string, type: string>>
  child 0, item: struct<title: string, url: string, type: string>
      child 0, title: string
      child 1, url: string
      child 2, type: string
is_new: bool
model_organization: string
to
{'model_name': Value('string'), 'model_organization': Value('string'), 'submitting_organization': Value('string'), 'submission_date': Value('timestamp[s]'), 'submission_type': Value('string'), 'modality': Value('string'), 'contact_info': {'email': Value('string'), 'name': Value('string'), 'github': Value('string')}, 'results': {'retail': {'pass_1': Value('float64'), 'cost': Value('float64')}, 'airline': {'pass_1': Value('float64'), 'cost': Value('float64')}, 'telecom': {'pass_1': Value('float64'), 'cost': Value('float64')}, 'banking_knowledge': {'pass_1': Value('float64'), 'cost': Value('float64'), 'retrieval_config': Value('string')}}, 'is_new': Value('bool'), 'trajectories_available': Value('bool'), 'trajectory_files': {'airline': Value('string'), 'banking_knowledge': Value('string'), 'retail': Value('string'), 'telecom': Value('string')}, 'references': List({'title': Value('string'), 'url': Value('string'), 'type': Value('string')}), 'methodology': {'evaluation_date': Value('timestamp[s]'), 'tau2_bench_version': Value('string'), 'user_simulator': Value('string'), 'notes': Value('string'), 'verification': {'modified_prompts': Value('bool'), 'omitted_questions': Value('bool'), 'details': Value('string')}}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 99, in get_rows_or_raise
                  return get_rows(
                         ^^^^^^^^^
                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 77, in get_rows
                  rows_plus_one = list(itertools.islice(ds, rows_max_number + 1))
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 2690, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 2227, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 2251, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 494, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/iterable_dataset.py", line 384, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/packaged_modules/json/json.py", line 299, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/packaged_modules/json/json.py", line 128, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 2321, in table_cast
                  return cast_table_to_schema(table, schema)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 2249, in cast_table_to_schema
                  raise CastError(
              datasets.table.CastError: Couldn't cast
              timestamp: string
              info: struct<git_commit: string, num_trials: int64, max_steps: int64, max_errors: int64, user_info: struct (... 545 chars omitted)
                child 0, git_commit: string
                child 1, num_trials: int64
                child 2, max_steps: int64
                child 3, max_errors: int64
                child 4, user_info: struct<implementation: string, llm: string, llm_args: struct<temperature: double>, global_simulation (... 64 chars omitted)
                    child 0, implementation: string
                    child 1, llm: string
                    child 2, llm_args: struct<temperature: double>
                        child 0, temperature: double
                    child 3, global_simulation_guidelines: string
                    child 4, voice_settings: null
                    child 5, persona_config: null
                child 5, agent_info: struct<implementation: string, llm: string, llm_args: struct<temperature: double>, voice_settings: n (... 4 chars omitted)
                    child 0, implementation: string
                    child 1, llm: string
                    child 2, llm_args: struct<temperature: double>
                        child 0, temperature: double
                    child 3, voice_settings: null
                child 6, environment_info: struct<domain_name: string, policy: string, tool_defs: null>
                    child 0, domain_name: string
                    child 1, policy: string
                    child 2, tool_defs: null
                child 7, seed: int64
                child 8, text_streaming_config: struct<chunk_by: string, chunk_size: int64>
                    child 0, chunk_by: string
                    child 1, chunk_size: int64
                child 9, speech_complexity: null
                child 10, audio_native_config: null
                child 11, retrieval_config: null
                child 1
              ...
              1, omitted_questions: bool
                    child 2, details: string
              contact_info: struct<email: string, name: string, github: string>
                child 0, email: string
                child 1, name: string
                child 2, github: string
              results: struct<retail: struct<pass_1: double, cost: double>, airline: struct<pass_1: double, cost: double>,  (... 129 chars omitted)
                child 0, retail: struct<pass_1: double, cost: double>
                    child 0, pass_1: double
                    child 1, cost: double
                child 1, airline: struct<pass_1: double, cost: double>
                    child 0, pass_1: double
                    child 1, cost: double
                child 2, telecom: struct<pass_1: double, cost: double>
                    child 0, pass_1: double
                    child 1, cost: double
                child 3, banking_knowledge: struct<pass_1: double, cost: double, retrieval_config: string>
                    child 0, pass_1: double
                    child 1, cost: double
                    child 2, retrieval_config: string
              submitting_organization: string
              submission_date: timestamp[s]
              trajectories_available: bool
              submission_type: string
              model_name: string
              modality: string
              trajectory_files: struct<airline: string, banking_knowledge: string, retail: string, telecom: string>
                child 0, airline: string
                child 1, banking_knowledge: string
                child 2, retail: string
                child 3, telecom: string
              references: list<item: struct<title: string, url: string, type: string>>
                child 0, item: struct<title: string, url: string, type: string>
                    child 0, title: string
                    child 1, url: string
                    child 2, type: string
              is_new: bool
              model_organization: string
              to
              {'model_name': Value('string'), 'model_organization': Value('string'), 'submitting_organization': Value('string'), 'submission_date': Value('timestamp[s]'), 'submission_type': Value('string'), 'modality': Value('string'), 'contact_info': {'email': Value('string'), 'name': Value('string'), 'github': Value('string')}, 'results': {'retail': {'pass_1': Value('float64'), 'cost': Value('float64')}, 'airline': {'pass_1': Value('float64'), 'cost': Value('float64')}, 'telecom': {'pass_1': Value('float64'), 'cost': Value('float64')}, 'banking_knowledge': {'pass_1': Value('float64'), 'cost': Value('float64'), 'retrieval_config': Value('string')}}, 'is_new': Value('bool'), 'trajectories_available': Value('bool'), 'trajectory_files': {'airline': Value('string'), 'banking_knowledge': Value('string'), 'retail': Value('string'), 'telecom': Value('string')}, 'references': List({'title': Value('string'), 'url': Value('string'), 'type': Value('string')}), 'methodology': {'evaluation_date': Value('timestamp[s]'), 'tau2_bench_version': Value('string'), 'user_simulator': Value('string'), 'notes': Value('string'), 'verification': {'modified_prompts': Value('bool'), 'omitted_questions': Value('bool'), 'details': Value('string')}}}
              because column names don't match

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AANA Contract Gate + GPT-4.1-mini τ²-Bench Submission Artifact

This artifact contains the official tau2 submit prepare output for a custom AANA pre-tool-call contract gate wrapped around the τ²-Bench text agent.

Evaluation date: 2026-05-07

Configuration:

  • Agent model: openai/gpt-4.1-mini
  • User simulator: openai/gpt-4.1-mini
  • Trials: 1 per task
  • Domains: airline, retail, telecom, banking_knowledge
  • Banking retrieval: bm25
  • Submission type: custom

Important limitation: this is an architecture validation run, not a 4-trial statistical reliability leaderboard claim. The custom AANA scaffold gates tool calls before execution with accept/ask/defer/refuse decisions; no tasks were omitted.

Prepared and validated with:

tau2 submit prepare ...
tau2 submit validate ...

Public references:

Implementation reference:

  • implementation/aana_contract_agent.py
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