Module runtime_codex 

Codex SDK-mode shim runtime: communicates with Codex via JSONL events from codex exec --json instead of screen-scraping a PTY.

Unlike the Claude SDK runtime (persistent subprocess with stdin NDJSON), Codex uses a spawn-per-message model: each SendMessage launches a new codex exec --json subprocess. Multi-turn context is preserved via codex exec resume <thread_id>.

Emits the same Command/Event protocol to the orchestrator as the PTY runtime, making it transparent to all upstream consumers.

Functions

run_codex_sdk

Run the Codex SDK-mode shim. This function does not return until the shim exits.