docs(CLAUDE.md): add tmux-cli + codex (ccc) usage instructions

Document the workflow for delegating tasks to Codex via tmux-cli
instead of using the Codex MCP server for long-running commands.

CLAUDE.md

@@ -59,6 +59,64 @@ All .NET code must follow the rules in [`docs/standards/dotnet-standards.md`](do
 - **Logging**: `Microsoft.Extensions.Logging` with Serilog provider; use `LogContext.PushProperty` for contextual enrichment
 - **Naming**: PascalCase for all public members; `ZB.MOM.NatsNet.Server.[Module]` namespace hierarchy
 
+## Using Codex via tmux-cli
+
+Use `tmux-cli` to launch and interact with OpenAI Codex (`ccc` alias) in a separate tmux pane. This lets you delegate tasks to Codex without blocking your current session.
+
+**Do NOT use the Codex MCP server (`mcp__codex__codex`) for long-running commands.** Use `tmux-cli` + `ccc` instead — it runs in a separate pane, won't time out, and lets you capture output when ready.
+
+### The `ccc` alias
+
+`ccc` runs `codex --dangerously-bypass-approvals-and-sandbox` (with Node/nvm auto-setup). Use it for tasks you want Codex to handle autonomously.
+
+### Workflow
+
+**Always launch a shell pane first** — if a command errors without a shell, the pane closes and output is lost:
+
+```bash
+# 1. Launch a shell (returns pane ID, e.g. "2")
+tmux-cli launch "zsh"
+
+# 2. Send a codex command to that pane
+tmux-cli send 'ccc "your prompt here"' --pane=2
+
+# 3. Wait for codex to finish (no output for N seconds = idle)
+tmux-cli wait_idle --pane=2 --idle-time=10.0
+
+# 4. Capture the output
+tmux-cli capture --pane=2
+
+# 5. Clean up when done
+tmux-cli kill --pane=2
+```
+
+### Key tmux-cli commands
+
+| Command | Purpose |
+|---------|---------|
+| `tmux-cli launch "zsh"` | Start a shell pane (do this FIRST) |
+| `tmux-cli send "cmd" --pane=N` | Send text + Enter to pane N |
+| `tmux-cli send "text" --pane=N --enter=False` | Send text without pressing Enter |
+| `tmux-cli send "text" --pane=N --delay-enter=0.5` | Custom delay before Enter (default 1.5s) |
+| `tmux-cli wait_idle --pane=N --idle-time=3.0` | Wait until pane has no output for N seconds |
+| `tmux-cli capture --pane=N` | Capture current pane output |
+| `tmux-cli list_panes` | List all panes (JSON with IDs and status) |
+| `tmux-cli kill --pane=N` | Kill a pane (cannot kill your own) |
+| `tmux-cli interrupt --pane=N` | Send Ctrl+C to a pane |
+| `tmux-cli escape --pane=N` | Send Escape to a pane |
+
+### Pane identifiers
+
+- Just the pane number: `2` (current window)
+- Full format: `session:window.pane` (e.g. `myapp:1.2`)
+
+### Tips
+
+- Use `wait_idle` instead of polling with repeated `capture` calls
+- Save the pane ID returned by `launch` for subsequent commands
+- Use `capture` to check state before sending input
+- For long-running Codex tasks, increase `--idle-time` (e.g. `--idle-time=15.0`)
+
 ## Reports
 
 - `reports/current.md` always has the latest porting status.