Bump openai to 2.52.0 and openai-agents to 0.19.1

[anticomputer]

Problem

Under Python 3.14 every run that streams from the Responses API dies before the first task completes:

AttributeError: 'typing.Union' object has no attribute '__discriminator__'
  .../openai/_models.py:691 in _build_discriminated_union_meta
    cast(CachedDiscriminatorType, union).__discriminator__ = details

openai 1.107.0 memoises discriminated-union metadata by assigning an attribute onto the typing.Union object itself. Python 3.14 made typing.Union instances carry no __dict__, so the assignment raises. It fires from agents/models/openai_responses.py on the streaming path, meaning the agent is unusable on 3.14 with any api_type: responses model.

Upstream fixed this in openai 2.7.2 (openai/openai-python@15a7ec8, #2704) by moving the cache to a weakref.WeakKeyDictionary. The pinned openai-agents==0.2.11 requires openai<2, so both had to move together.

Change

pyproject.toml only:

package	before	after
openai	1.107.0	2.52.0
openai-agents	0.2.11	0.19.1
griffe	1.7.3	—
griffelib	—	2.1.0

openai-agents 0.19.1 depends on griffelib, which ships the same griffe import name that agents/function_schema.py uses. Since this file pins transitively, the stale griffe pin is replaced rather than left to dangle — leaving both installed lets whichever is uninstalled last clobber the shared griffe/ directory.

No source changes were needed; pip check reports no broken requirements and no other pin in the file drifted.

Validation

• pytest: 556 passed, 2 skipped — unchanged from before the bump.

• hatch fmt --linter --check: clean.

• Live smoke run against CAPI on Python 3.14.5, one task per backend, all four returning normally where the first previously aborted with the AttributeError:

  slot	model	backend	api_type
  general_tasks	gpt-5.4	openai_agents	responses
  hunt_claude	claude-opus-5	anthropic_sdk	messages
  hunt_gemini	gemini-3.6-flash	openai_agents	chat_completions
  adjudication	grok-4.5	openai_agents	responses

[Copilot]

Pull request overview

Updates the project’s pinned OpenAI SDK dependencies to versions compatible with Python 3.14 streaming on the Responses API, addressing the typing.Union discriminated-union metadata caching issue described in the PR.

Changes:

• Bump openai from 1.107.0 to 2.52.0.
• Bump openai-agents from 0.2.11 to 0.19.1.
• Replace the griffe pin with griffelib to align with openai-agents’ newer dependency chain.

Show a summary per file

File	Description
pyproject.toml	Updates pinned dependency versions for openai/openai-agents and swaps griffe → griffelib to match the upgraded agent SDK dependency set.

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