Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-hooks/src/error.rs

@@ -0,0 +1,59 @@
+use std::path::PathBuf;
+
+/// Errors that can occur during hook loading, parsing, or execution.
+#[derive(Debug, thiserror::Error)]
+pub enum HookError {
+    #[error("failed to read hook file {path}: {source}")]
+    ReadFile {
+        path: PathBuf,
+        source: std::io::Error,
+    },
+
+    #[error("failed to parse hook file {path}: {detail}")]
+    ParseFile { path: PathBuf, detail: String },
+
+    #[error("hook {name} in {path}: invalid regex pattern: {source}")]
+    InvalidMatcher {
+        name: String,
+        path: PathBuf,
+        source: regex::Error,
+    },
+
+    #[error("hook {name} in {path}: lifecycle hooks ({event}) must not specify a matcher in v0")]
+    LifecycleMatcherNotAllowed {
+        name: String,
+        path: PathBuf,
+        event: String,
+    },
+
+    #[error("hook {name} timed out after {elapsed_ms}ms")]
+    Timeout { name: String, elapsed_ms: u64 },
+
+    #[error("hook {name} command failed: {source}")]
+    CommandFailed {
+        name: String,
+        source: std::io::Error,
+    },
+
+    #[error("hook {name} produced invalid output: {detail}")]
+    InvalidOutput { name: String, detail: String },
+
+    #[error("hook {name}: command not found or not executable: {path}")]
+    CommandNotFound { name: String, path: PathBuf },
+
+    #[error("hook {name} in {path}: {detail}")]
+    InvalidConfig {
+        name: String,
+        path: PathBuf,
+        detail: String,
+    },
+
+    #[error(
+        "hook {name} in {path}: unsupported handler type '{handler_type}', only 'command' is supported in v0"
+    )]
+    UnsupportedHandlerType {
+        name: String,
+        path: PathBuf,
+        handler_type: String,
+    },
+}