OpenAI Codex CLI enters rapid 0.155.0 alpha train with a new V8 runtime dependency
OpenAI
The openai/codex repo published eight pre-releases in two days (0.155.0-alpha.9 through alpha.15 plus interleaved alpha.2.5/2.6, Sep 16-17), signaling an imminent 0.155.0 stable cut from parallel release branches. A standalone rusty-v8-v152.2.0 dependency bump shipped alongside, indicating the Rust-based CLI is integrating a V8 JavaScript engine.
Why it matters
The cadence and the new V8 dependency point to a substantial upcoming Codex capability, likely in-process JavaScript tooling or scripting inside the agent harness.
Importance: 1/5
Pre-release train; no stable release yet
Sources
official
Releases - openai/codex