Files
codex/sdk/python/README.md
Shaqayeq d864b8c836 python-sdk: expose canonical app-server types (2026-03-16)
Remove the SDK alias/result layers so the wrapper surface returns canonical generated app-server models directly.

- delete public type alias modules and regenerate v2_all.py against current schema
- return InitializeResponse from metadata and generated Turn from run()
- update docs, examples, notebook, and tests to use canonical generated models and repo-only text extraction helpers

Validation:
- PYTHONPATH=sdk/python/src python3 -m pytest sdk/python/tests
- GH_TOKEN="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" RUN_REAL_CODEX_TESTS=1 PYTHONPATH=sdk/python/src python3 -m pytest sdk/python/tests -rs

Co-authored-by: Codex <noreply@openai.com>
2026-03-16 14:04:55 -07:00

3.2 KiB
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Codex App Server Python SDK (Experimental)

Experimental Python SDK for codex app-server JSON-RPC v2 over stdio, with a small default surface optimized for real scripts and apps.

The generated wire-model layer is currently sourced from the bundled v2 schema and exposed as Pydantic models with snake_case Python fields that serialize back to the app-servers camelCase wire format.

Install

cd sdk/python
python -m pip install -e .

Published SDK builds pin an exact codex-cli-bin runtime dependency. For local repo development, either pass AppServerConfig(codex_bin=...) to point at a local build explicitly, or use the repo examples/notebook bootstrap which installs the pinned runtime package automatically.

Quickstart

from codex_app_server import Codex, TextInput

with Codex() as codex:
    thread = codex.thread_start(model="gpt-5")
    completed_turn = thread.turn(TextInput("Say hello in one sentence.")).run()
    print(completed_turn.status)
    print(completed_turn.id)

Docs map

  • Golden path tutorial: docs/getting-started.md
  • API reference (signatures + behavior): docs/api-reference.md
  • Common decisions and pitfalls: docs/faq.md
  • Runnable examples index: examples/README.md
  • Jupyter walkthrough notebook: notebooks/sdk_walkthrough.ipynb

Examples

Start here:

cd sdk/python
python examples/01_quickstart_constructor/sync.py
python examples/01_quickstart_constructor/async.py

Runtime packaging

The repo no longer checks codex binaries into sdk/python.

Published SDK builds are pinned to an exact codex-cli-bin package version, and that runtime package carries the platform-specific binary for the target wheel.

For local repo development, the checked-in sdk/python-runtime package is only a template for staged release artifacts. Editable installs should use an explicit codex_bin override for manual SDK usage; the repo examples and notebook bootstrap the pinned runtime package automatically.

Maintainer workflow

cd sdk/python
python scripts/update_sdk_artifacts.py generate-types
python scripts/update_sdk_artifacts.py \
  stage-sdk \
  /tmp/codex-python-release/codex-app-server-sdk \
  --runtime-version 1.2.3
python scripts/update_sdk_artifacts.py \
  stage-runtime \
  /tmp/codex-python-release/codex-cli-bin \
  /path/to/codex \
  --runtime-version 1.2.3

This supports the CI release flow:

  • run generate-types before packaging
  • stage codex-app-server-sdk once with an exact codex-cli-bin==... dependency
  • stage codex-cli-bin on each supported platform runner with the same pinned runtime version
  • build and publish codex-cli-bin as platform wheels only; do not publish an sdist

Compatibility and versioning

  • Package: codex-app-server-sdk
  • Runtime package: codex-cli-bin
  • Current SDK version in this repo: 0.2.0
  • Python: >=3.10
  • Target protocol: Codex app-server JSON-RPC v2
  • Recommendation: keep SDK and codex CLI reasonably up to date together

Notes

  • Codex() is eager and performs startup + initialize in the constructor.
  • Use context managers (with Codex() as codex:) to ensure shutdown.
  • For transient overload, use codex_app_server.retry.retry_on_overload.