Add Codex remote-control backend

agents.example.toml

@@ -6,7 +6,7 @@
 #
 # This example is self-contained: its agents use a dependency-free `demo` backend (a shell that
 # just idles), so the whole project can be brought up and torn down with no external agent CLI —
-# see ./smoke.sh. The `claude` and `opencode` backends below are the real ones; point an agent at
+# see ./smoke.sh. The `claude`, `codex`, and `opencode` backends below are real; point an agent at
 # them with `backend = "claude"` for a live run.
 
 # ─────────────────────────── global watchdog cadence ───────────────────────────
@@ -42,11 +42,29 @@ supports_resume = true
 prompt_delivery = "arg"
 process_name    = "claude"       # used for backend-mismatch healing
 submit_key      = "Enter"
+startup_prompt_re       = "Trusting the directory|Do you trust"
+startup_prompt_response = "1"
+startup_prompt_delay    = 2
 stall_idle      = 300
 active_re = "esc to interrupt|Running tool|⠇|⠙|· \\d+"
 limit_re  = "spend limit|usage limit|limit reached|reached your .*limit|out of (credits|tokens)"
 fatal_re  = "redacted_thinking|blocks cannot be modified|cannot be modified"
 
+[backend.codex]                  # Codex TUI + the shared Remote Control app-server daemon
+bin             = "codex"
+preamble        = "{bin} remote-control start --json >/dev/null"
+flags           = "--dangerously-bypass-approvals-and-sandbox --dangerously-bypass-hook-trust --no-alt-screen"
+supports_resume = false          # the harness does not yet persist Codex thread IDs
+prompt_delivery = "arg"
+process_name    = "codex"
+footer_ui       = true
+log_grace       = 180
+submit_key      = "Enter"
+stall_idle      = 300
+active_re = "esc to interrupt|working|thinking|running|searching|exploring|implementing"
+limit_re  = "usage limit|limit reached|reached your .*limit|out of (credits|tokens)"
+fatal_re  = "connection is errored|not logged in|authentication required"
+
 [backend.opencode]               # the real opencode backend (a TUI; prompt typed after connect)
 bin             = "opencode"
 attach          = "{bin} attach {server} --dir {dir}"