feat: add memory management tools and utility commands

src/tool/fs/delete.rs

@@ -0,0 +1,63 @@
+use std::fs;
+use std::path::PathBuf;
+use serde_json::{json, Value};
+use anyhow::{Result, anyhow};
+use super::super::Tool;
+use super::super::ToolCtx;
+use super::super::resolve_path;
+use super::helpers::arg_str;
+
+pub struct Delete;
+
+impl Tool for Delete {
+    fn name(&self) -> &'static str {
+        "delete"
+    }
+
+    fn description(&self) -> &'static str {
+        "Delete a file or empty directory. Will not delete non-empty directories."
+    }
+
+    fn parameters(&self) -> Value {
+        json!({
+            "type": "object",
+            "properties": {
+                "path": {
+                    "type": "string",
+                    "description": "Path to the file or directory to delete (relative to workspace root)"
+                }
+            },
+            "required": ["path"]
+        })
+    }
+
+    fn run(&self, ctx: &ToolCtx, args: &Value) -> Result<String> {
+        let rel = arg_str(args, "path")?;
+        let path: PathBuf = resolve_path(&ctx.workspaces, &rel)?;
+
+        if !path.exists() {
+            return Ok(format!("path '{}' does not exist (resolved to {})", rel, path.display()));
+        }
+
+        let metadata = path.metadata()
+            .map_err(|e| anyhow!("failed to read metadata for '{}': {}", rel, e))?;
+
+        if metadata.is_dir() {
+            let is_empty = fs::read_dir(&path)
+                .map_err(|e| anyhow!("failed to read directory '{}': {}", rel, e))?
+                .next()
+                .is_none();
+            if is_empty {
+                fs::remove_dir(&path)
+                    .map_err(|e| anyhow!("failed to remove directory '{}': {}", rel, e))?;
+                Ok(format!("removed empty directory {}", rel))
+            } else {
+                anyhow::bail!("directory '{}' is not empty (refusing to delete)", rel);
+            }
+        } else {
+            fs::remove_file(&path)
+                .map_err(|e| anyhow!("failed to delete '{}': {}", rel, e))?;
+            Ok(format!("deleted {}", rel))
+        }
+    }
+}

src/tool/fs/mod.rs

@@ -1,3 +1,4 @@
+pub mod delete;
 pub mod edit;
 pub mod helpers;
 pub mod read;