AWS Labs open-source (5k+★): one harness-neutral core turns Claude Code/Codex/Cursor/Copilot/Kiro/opencode into structured, verifiable delivery workflows via `aidlc config --harness` + doctor—install script, not a new agent.
OpenAI Codex 0.163.0 lets you send a follow-up while it is still answering (interrupt also stops Code Mode cells/tool calls), adds searchable live /config, parallel skill/memory/history reads, and Daybreak-by-default for eligible accounts.