stefanstokic-oai
cbf62f64cb
## Why External agent migration detection parsed and hashed every JSONL session file. For users with many large conversations, launching migration could consume substantial CPU and disk resources. Detection only needs the most recent sessions for the migration UI, so full-content work should be bounded. ## What - Use file modification metadata to select the 50 most recent eligible sessions before parsing JSONL content. - Skip unchanged imported sessions using metadata stored in the import ledger. - Preserve content hashing when metadata indicates a session may have changed. - Stream SHA-256 calculation through a 64 KiB buffer instead of loading an entire session into memory. - Continue detecting older sessions in subsequent batches after newer sessions are imported. ## Validation - `RUST_MIN_STACK=8388608 cargo nextest run --no-fail-fast -p codex-external-agent-sessions` - 20 tests passed. - Benchmarked release builds against 250 valid JSONL sessions totaling 501 MiB: - Median detection time decreased from 1,138.8 ms to 47.0 ms. - CPU instructions decreased by 95.8%. - Both versions returned the expected 50 sessions. The benchmark used warm filesystem caches and measured the reduction in parsing, hashing, and CPU work.
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.