Add exec-server filesystem RPCs and a core-side remote filesystem client,
then route unified-exec and filesystem-backed tools through that backend
when enabled by config. Also add Docker-backed remote exec integration
coverage for the local codex-exec CLI.
Co-authored-by: Codex <noreply@openai.com>
Separate the transport-neutral JSON-RPC connection and server processor from
local process spawning, add websocket support, and document the new API
shape.
Co-authored-by: Codex <noreply@openai.com>
This adds the standalone exec-server stdio JSON-RPC crate and its
smoke tests without wiring it into the CLI or unified-exec yet.
Co-authored-by: Codex <noreply@openai.com>
