Codex now prepares AGENTS.md instructions and tools in parallel
GitHub·low signal
openai/codex PR #47458, merged 2026-09-23 (+375/-71), runs the AGENTS.md and thread-instruction refresh concurrently with capability discovery, MCP setup and tool construction. Instruction warnings still reach the user if tool preparation fails or is cancelled. The plugin snapshot publishes only after both branches succeed. Sessions with many MCP servers should start turns sooner.