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## Why Applications need to deliver content from other agents, tools, or services with tool-level authority, without treating it as user input or granting authorization. ## What changed - Export `ExternalMessage` for sync and async `run(...)` and `turn(...)`, accepting text or structured content with a tool name and optional namespace. Send it through `toolOutput` and require CLI 0.151.0 or newer. - Support starting a turn or joining an active regular turn while preserving external content as function output in history. Keep external messages separate from user-input lists and `steer(...)`. - Give turn handles independent subscriptions, replaying completed items and latest usage to joining handles. Release consumed transient events and clean up subscriptions on closure, failure, or cancellation. - Document the authority boundary and add sync and async examples. ## Testing Add coverage for wire representations, input validation, runtime compatibility, tool authority across resume, active-turn joins, and tool-output truncation. Add subscription tests for replay, concurrent consumers, early completion, cancellation, and cleanup. GitOrigin-RevId: 6106327085fd9c4bd11b71e20b3d8e74738b8bb5
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Python SDK Examples
Each example folder contains runnable versions:
sync.py(public sync surface:Codex)async.py(public async surface:AsyncCodex)
All examples intentionally use only public SDK exports from openai_codex
and openai_codex.types.
Examples use plain strings for text-only turns and typed input objects for multimodal or structured input lists.
Use ExternalMessage for untrusted content from another agent, tool, or
application. It retains tool-level authority and does not grant user
authorization or approval; example 16 establishes the user's task first.
Prerequisites
- Python
>=3.10 - Install the SDK for the same Python interpreter you will use to run examples
Install the published SDK:
python -m pip install openai-codex
The SDK installs its pinned openai-codex-cli-bin runtime dependency.
The pinned runtime version comes from the SDK package dependency.
Run From A Checkout
Contributors using these checked-in scripts should install development
dependencies from sdk/python:
uv sync --group dev
source .venv/bin/activate
The examples bootstrap local SDK imports from sdk/python/src. If the pinned
runtime is not already installed, the bootstrap installs the matching runtime
package for the active interpreter and cleans up temporary files afterward.
Run examples
From sdk/python:
python examples/<example-folder>/sync.py
python examples/<example-folder>/async.py
The checked-in examples use the local SDK source tree automatically.
Recommended first run
python examples/01_quickstart_constructor/sync.py
python examples/01_quickstart_constructor/async.py
Index
01_quickstart_constructor/- first run / sanity check
02_turn_run/- inspect full turn output fields
03_turn_stream_events/- stream a turn with a small curated event view
04_models_and_metadata/- discover visible models for the connected runtime
05_existing_thread/- resume a real existing thread (created in-script)
06_thread_lifecycle_and_controls/- thread lifecycle + control calls
07_image_and_text/- image data URL + text multimodal turn
08_local_image_and_text/- local image + text multimodal turn using a generated temporary sample image
09_async_parity/- parity-style sync flow (see async parity in other examples)
10_error_handling_and_retry/- overload retry pattern + typed error handling structure
11_cli_mini_app/- interactive chat loop
12_turn_params_kitchen_sink/- structured output with a curated advanced
turn(...)configuration
- structured output with a curated advanced
13_model_select_and_turn_params/- list models, pick highest model + highest supported reasoning effort, run turns, print message and usage
14_turn_controls/- separate
steer()andinterrupt()demos with concise summaries
- separate
15_login_and_account/- browser-login handle lifecycle, cancellation, and account inspection
16_external_message/- process an untrusted external notification within a user-authorized task