feat(daemon): add remote backend JSON-RPC prototype

REMOTE_BACKEND_POC.md

@@ -0,0 +1,69 @@
+# Remote Backend POC (daemon)
+
+This fork includes a **proof-of-concept** daemon that runs CodexMonitor's backend logic in a separate process (intended for WSL2/Linux), exposing a simple **line-delimited JSON-RPC** protocol over TCP.
+
+This is **not** wired into the desktop app yet (no UI toggle / remote proxy), but it is useful to validate the architecture and iterate on the protocol.
+
+## Run
+
+From the repo root:
+
+```bash
+cd src-tauri
+
+# pick a strong token (or export CODEX_MONITOR_DAEMON_TOKEN)
+TOKEN="change-me"
+
+cargo run --bin codex_monitor_daemon -- \
+  --listen 127.0.0.1:4732 \
+  --data-dir "$HOME/.local/share/codex-monitor-daemon" \
+  --token "$TOKEN"
+```
+
+Notes:
+- In WSL2, Windows access usually requires binding to `0.0.0.0` (depending on your port forwarding setup).
+- `--insecure-no-auth` exists for local dev only.
+
+## Protocol
+
+- One JSON object per line.
+- Requests: `{"id": <number>, "method": "<string>", "params": <object|null>}`
+- Responses: `{"id": <number>, "result": <any>}` or `{"id": <number>, "error": {"message": "<string>"}}`
+- Events (server → client notifications): `{"method":"app-server-event","params":{...}}`
+
+### Auth handshake (required unless `--insecure-no-auth`)
+
+First request must be:
+
+```json
+{"id": 1, "method": "auth", "params": {"token": "..." }}
+```
+
+## Quick test with netcat
+
+```bash
+printf '{\"id\":1,\"method\":\"auth\",\"params\":{\"token\":\"change-me\"}}\\n' | nc -w 1 127.0.0.1 4732
+printf '{\"id\":2,\"method\":\"ping\"}\\n' | nc -w 1 127.0.0.1 4732
+printf '{\"id\":3,\"method\":\"list_workspaces\",\"params\":{}}\\n' | nc -w 1 127.0.0.1 4732
+```
+
+## Implemented methods (initial)
+
+- `ping`
+- `list_workspaces`
+- `add_workspace` (`{ path, codex_bin? }`)
+- `connect_workspace` (`{ id }`)
+- `list_workspace_files` (`{ workspaceId }`)
+- `get_app_settings`
+- `update_app_settings` (`{ settings }`)
+- `start_thread` (`{ workspaceId }`)
+- `resume_thread` (`{ workspaceId, threadId }`)
+- `list_threads` (`{ workspaceId, cursor?, limit? }`)
+- `archive_thread` (`{ workspaceId, threadId }`)
+- `send_user_message` (`{ workspaceId, threadId, text, model?, effort?, accessMode?, images? }`)
+- `turn_interrupt` (`{ workspaceId, threadId, turnId }`)
+- `start_review` (`{ workspaceId, threadId, target, delivery? }`)
+- `model_list` (`{ workspaceId }`)
+- `account_rate_limits` (`{ workspaceId }`)
+- `skills_list` (`{ workspaceId }`)
+- `respond_to_server_request` (`{ workspaceId, requestId, result }`)

src-tauri/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.1.0"
 description = "A Tauri App"
 authors = ["you"]
 edition = "2021"
+default-run = "codex-monitor"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
@@ -23,7 +24,7 @@ tauri-plugin-opener = "2"
 tauri-plugin-process = "2"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-tokio = { version = "1", features = ["io-util", "process", "rt", "sync", "time"] }
+tokio = { version = "1", features = ["io-util", "net", "process", "rt", "sync", "time"] }
 uuid = { version = "1", features = ["v4"] }
 tauri-plugin-dialog = "2"
 git2 = "0.20.3"