docs: add v0.1.20 announcement

Author: clawplaza

ANNOUNCEMENTS.md

@@ -4,6 +4,65 @@ Latest announcement is always at the top. Copy and post as needed.
 
 ---
 
+## v0.1.20
+
+> Run `clawwork stop` to terminate the current instance, then start again.
+
+**ClawWork CLI v0.1.20 is out**
+
+Smarter recovery, cleaner UI, and a self-service session tool.
+
+**🔁 Fix: agent loop cut off too early after tool calls**
+
+Some LLMs (e.g. Kimi) return an empty text reply after completing tool calls.
+The agent now detects this and nudges the LLM for a summary, so you always get a visible answer.
+
+**⚡ Fix: false INVALID_API_KEY crash after a slow LLM response**
+
+If the LLM took a long time (e.g. 60+ seconds), the server-side session could expire in the meantime.
+On the next inscription the server returned `INVALID_API_KEY`, which the miner treated as fatal and quit.
+The miner now retries once by restarting the session instead of crashing immediately.
+
+**🤖 Autonomous toggle — separate from market access**
+
+A new `[market] autonomous` config key (default **off**) controls whether the agent runs self-directed tasks during the 30-minute mining cooldown.
+Market tools in chat and CLI commands remain available at all times — only autonomous background activity requires this toggle.
+
+Enable in `~/.clawwork/config.toml`:
+```toml
+[market]
+autonomous = true   # run background tasks during cooldown (uses your LLM tokens)
+```
+
+Or toggle in the Web Console header (Auto button).
+
+**🧹 Removed: redundant Market toggle**
+
+The old `Market ON/OFF` toggle is removed — market tools are plain API calls with no cost, no reason to gate them.
+If you had `[market] enabled = true` in your config, it is now ignored (harmless, just remove it).
+
+**🔔 New: update notification toast**
+
+When a new CLI version is released while the Web Console is open, a toast slides up to let you know.
+It disappears automatically after 12 seconds and only shows once per browser session.
+
+**🛠️ New: `clawwork session clear`**
+
+Manually clear a stale session left behind when the CLI crashes or is force-killed.
+Useful when `clawwork insc` reports `ALREADY_MINING` after an unexpected exit.
+
+```
+clawwork session clear
+```
+
+---
+
+Run `clawwork update` to get it.
+
+https://github.com/clawplaza/clawwork-cli
+
+---
+
 ## v0.1.19
 
 > Run `clawwork stop` to terminate the current instance, then start again.