src/thought -> src/agent

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

src/agent/tools/read.rs

@@ -0,0 +1,65 @@
+// tools/read.rs — Read file contents
+
+use anyhow::{Context, Result};
+use serde::Deserialize;
+use serde_json::json;
+
+use super::ToolDef;
+
+#[derive(Deserialize)]
+struct Args {
+    file_path: String,
+    #[serde(default = "default_offset")]
+    offset: usize,
+    limit: Option<usize>,
+}
+
+fn default_offset() -> usize { 1 }
+
+pub fn definition() -> ToolDef {
+    ToolDef::new(
+        "read_file",
+        "Read the contents of a file. Returns the file contents with line numbers.",
+        json!({
+            "type": "object",
+            "properties": {
+                "file_path": {
+                    "type": "string",
+                    "description": "Absolute path to the file to read"
+                },
+                "offset": {
+                    "type": "integer",
+                    "description": "Line number to start reading from (1-based). Optional."
+                },
+                "limit": {
+                    "type": "integer",
+                    "description": "Maximum number of lines to read. Optional."
+                }
+            },
+            "required": ["file_path"]
+        }),
+    )
+}
+
+pub fn read_file(args: &serde_json::Value) -> Result<String> {
+    let args: Args = serde_json::from_value(args.clone())
+        .context("invalid read_file arguments")?;
+
+    let content = std::fs::read_to_string(&args.file_path)
+        .with_context(|| format!("Failed to read {}", args.file_path))?;
+
+    let lines: Vec<&str> = content.lines().collect();
+    let offset = args.offset.max(1) - 1;
+    let limit = args.limit.unwrap_or(lines.len());
+
+    let mut output = String::new();
+    for (i, line) in lines.iter().skip(offset).take(limit).enumerate() {
+        output.push_str(&format!("{:>6}\t{}\n", offset + i + 1, line));
+    }
+
+    if output.is_empty() {
+        output = "(empty file)\n".to_string();
+    }
+
+    Ok(output)
+}