feat: initial release — ZeroClaw v0.1.0

- 22 AI providers (OpenRouter, Anthropic, OpenAI, Mistral, etc.)
- 7 channels (CLI, Telegram, Discord, Slack, iMessage, Matrix, Webhook)
- 5-step onboarding wizard with Project Context personalization
- OpenClaw-aligned system prompt (SOUL.md, IDENTITY.md, USER.md, AGENTS.md, etc.)
- SQLite memory backend with auto-save
- Skills system with on-demand loading
- Security: autonomy levels, command allowlists, cost limits
- 532 tests passing, 0 clippy warnings

src/observability/mod.rs

@@ -0,0 +1,76 @@
+pub mod log;
+pub mod multi;
+pub mod noop;
+pub mod traits;
+
+pub use self::log::LogObserver;
+pub use noop::NoopObserver;
+pub use traits::{Observer, ObserverEvent};
+
+use crate::config::ObservabilityConfig;
+
+/// Factory: create the right observer from config
+pub fn create_observer(config: &ObservabilityConfig) -> Box<dyn Observer> {
+    match config.backend.as_str() {
+        "log" => Box::new(LogObserver::new()),
+        "none" | "noop" => Box::new(NoopObserver),
+        _ => {
+            tracing::warn!(
+                "Unknown observability backend '{}', falling back to noop",
+                config.backend
+            );
+            Box::new(NoopObserver)
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn factory_none_returns_noop() {
+        let cfg = ObservabilityConfig {
+            backend: "none".into(),
+        };
+        assert_eq!(create_observer(&cfg).name(), "noop");
+    }
+
+    #[test]
+    fn factory_noop_returns_noop() {
+        let cfg = ObservabilityConfig {
+            backend: "noop".into(),
+        };
+        assert_eq!(create_observer(&cfg).name(), "noop");
+    }
+
+    #[test]
+    fn factory_log_returns_log() {
+        let cfg = ObservabilityConfig {
+            backend: "log".into(),
+        };
+        assert_eq!(create_observer(&cfg).name(), "log");
+    }
+
+    #[test]
+    fn factory_unknown_falls_back_to_noop() {
+        let cfg = ObservabilityConfig {
+            backend: "prometheus".into(),
+        };
+        assert_eq!(create_observer(&cfg).name(), "noop");
+    }
+
+    #[test]
+    fn factory_empty_string_falls_back_to_noop() {
+        let cfg = ObservabilityConfig { backend: "".into() };
+        assert_eq!(create_observer(&cfg).name(), "noop");
+    }
+
+    #[test]
+    fn factory_garbage_falls_back_to_noop() {
+        let cfg = ObservabilityConfig {
+            backend: "xyzzy_garbage_123".into(),
+        };
+        assert_eq!(create_observer(&cfg).name(), "noop");
+    }
+}