Add session persistence and improve terminal ergonomics

README.md

@@ -32,7 +32,16 @@ you>
 ```
 
 Interactive responses stream into the terminal as they are generated, and the
-session keeps conversation history until you reset or exit.
+session keeps conversation history until you reset it. The current session is
+saved to `.harness/session.json` and reloaded the next time the app starts.
+
+For multiline input, end a line with `\` and keep typing:
+
+```text
+you> summarize this:\
+...> line two\
+...> line three
+```
 
 You can also keep using one-shot mode when scripting:
 
@@ -81,8 +90,11 @@ npm run dev -- "/tools"
 The core provides:
 
 - `/help` — show available commands
-- `/history` — show how many conversation items are currently in memory
+- `/history` — show current session details
+- `/new` — start a fresh empty conversation
 - `/reset` — clear the current conversation history
+- `/save` — persist the current conversation immediately
+- `/logs [on|off]` — toggle lifecycle traces
 - `/exit` — leave the interactive session
 
 Extensions can register their own commands.