docs: enrich README with project overview and roadmap

README.md

@@ -1,6 +1,10 @@
 # NOC — Not OpenClaw
 
-Telegram bot that bridges messages to `claude` sessions.
+Telegram bot that bridges messages to local `claude` CLI sessions — chat with Claude directly from Telegram.
+
+```
+User → Telegram → noc bot → claude --resume → stream back → Telegram
+```
 
 ~600 lines of Rust. One binary. One config file. Does the thing.
 
@@ -23,31 +27,64 @@ NOC is for those people.
 5. Files uploaded to the bot are forwarded to Claude; files Claude writes to the output dir are sent back
 6. Sessions are scoped per chat and refresh daily at a configurable hour (default: 5am)
 
+Session IDs are deterministic — generated with UUIDv5 from `(chat_id, date)`, format: `noc-{chat_id}-{YYYYMMDD}`.
+
 ## Setup
 
 ```bash
 cp config.example.yaml config.yaml
-# edit config.yaml with your values
+# fill in your values
 ```
 
-## Config
+### Config
 
 | Key | Description |
 |-----|-------------|
 | `tg.key` | Telegram bot token |
 | `auth.passphrase` | Passphrase required to authenticate each session |
-| `session.refresh_hour` | Hour (local time, 24h) when sessions reset |
+| `session.refresh_hour` | Hour (local time, 24h) when sessions reset (default: `5`) |
 
 ## Deploy
 
+### Local
+
 ```bash
 make deploy
 ```
 
-Builds the release binary and installs a `systemd --user` service. Remote deployment via `make deploy-hera`.
+Builds the release binary and installs a `systemd --user` service.
+
+### Remote (hera)
+
+```bash
+make deploy-hera
+```
+
+Builds locally, copies the binary and config to `heradev`, then starts the service there.
 
 ## Logs
 
 ```bash
 journalctl --user -u noc -f
 ```
+
+## Tech stack
+
+| Layer | Technology |
+|-------|-----------|
+| Language | Rust (2021 edition) |
+| Telegram | teloxide 0.12 |
+| Async runtime | tokio (full) |
+| Config | YAML + serde |
+| Deployment | systemd user service + Makefile |
+
+## Roadmap
+
+- [ ] Streaming responses — edit message as output arrives
+- [ ] Markdown formatting — MarkdownV2 rendering
+- [ ] Timeout handling — kill claude if it hangs
+- [ ] Graceful shutdown on SIGTERM
+- [ ] `/reset` command — force new session without waiting for daily refresh
+- [ ] Rate limiting per chat
+- [ ] Voice message support — STT (whisper.cpp) → text → claude
+- [ ] Video/audio transcription