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Shaqayeq 09a265122d python-sdk: pin repo runtime bootstrap version (2026-03-12)

Remove CODEX_PYTHON_RUNTIME_VERSION from the repo bootstrap path and always provision the checked-in pinned codex-cli-bin runtime version for examples, notebook, and real integration coverage.

This keeps repo-source Python execution aligned with one binary contract, rewires the real integration harness and notebook bootstrap to use the pinned runtime directly, and updates the docs to describe automatic pinned-runtime provisioning instead of env-driven overrides.

Validation:
- RUN_REAL_CODEX_TESTS=1 python3 -m pytest sdk/python/tests -rs
- RUN_REAL_CODEX_TESTS=1 python3 -m pytest sdk/python/tests/test_real_app_server_integration.py -rs

Co-authored-by: Codex <noreply@openai.com>

2026-03-12 23:20:04 -07:00

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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-server’s 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")
    result = thread.turn(TextInput("Say hello in one sentence.")).run()
    print(result.text)

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.

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