## Summary - restore the existing `codex.tool_result` behavior and remove the added `codex.inference` event - emit `codex.tool_call` timing events only for direct tool calls - snapshot the execution-start marker once when emitting `codex.tool_call` so a concurrent dispatch start cannot produce internally inconsistent timing fields ## Why This keeps the stacked change focused on direct tool-call timing without expanding result or inference telemetry. The timing-marker fix addresses repeated reads of the marker during event emission, which could otherwise observe different states if dispatch begins concurrently. ## Validation - `just fmt` - `git diff --check HEAD~3..HEAD` - `just test -p codex-core tool_call_timing_guard_ignores_code_mode_source` - `just test -p codex-app-server app_server_emits_structured_tool_call_timing_event` - `just test -p codex-otel otel_export_routing_policy_routes_tool_result_log_and_trace_events` I also attempted `just test -p codex-core -p codex-otel -p codex-app-server`; that broader run was not completed after multiple app-server tests timed out.
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.
