diff --git a/.pi/extensions/pi-worktree.ts b/.pi/extensions/pi-worktree.ts
index ea6bbbe..fe0a7ce 100644
--- a/.pi/extensions/pi-worktree.ts
+++ b/.pi/extensions/pi-worktree.ts
@@ -71,12 +71,37 @@ const removeWorktreeParams = Type.Object({
 
 /**
  * Parse raw `git worktree list` output into structured entries.
+ *
+ * Expected format (whitespace-separated):
+ *   /path/to/repo    abc1234 [main]
+ *   /tmp/feature-x   def5678 [feature-x]
+ *   /tmp/detached    fedcba HEAD
+ *
  * @param rawOutput - Raw stdout from `git worktree list`
  * @param currentDir - Current working directory for comparison
  * @returns Array of parsed worktree entries
  */
 function parseWorktreeList(rawOutput: string, currentDir: string): WorktreeEntry[] {
-	throw new Error("not implemented");
+	const lines = rawOutput.trim().split("\n").filter((line) => line.trim());
+
+	return lines.map((line) => {
+		// Split on whitespace: path, commit_hash, [branch] or HEAD
+		const parts = line.trim().split(/\s+/);
+		const worktreePath = parts[0];
+		const commitHash = parts[1];
+		const branchRaw = parts.slice(2).join(" ");
+
+		// Extract branch name from brackets, or mark as detached
+		const bracketMatch = branchRaw.match(/^\[(.+)\]$/);
+		const branchName = bracketMatch ? bracketMatch[1] : "(detached)";
+
+		return {
+			path: worktreePath,
+			commit: commitHash,
+			branch: branchName,
+			isCurrent: worktreePath === currentDir,
+		};
+	});
 }
 
 /**
@@ -99,72 +124,81 @@ function resolveWorktreeTarget(target: string, worktrees: WorktreeEntry[]): stri
 	throw new Error("not implemented");
 }
 
-// ─── Tool Definitions ──────────────────────────────────────────────
-
-/** Create a linked worktree for a branch in the current repo. */
-const gitWorktreeCreateTool = defineTool({
-	name: "git_worktree_create",
-	label: "Git Worktree Create",
-	description: "Create a linked worktree for a branch in the current repo.",
-	parameters: createWorktreeParams,
-	async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
-		return {
-			content: [{ type: "text", text: "Error: git_worktree_create is not yet implemented. Suggestion: Use `git worktree add` manually until this tool is complete." }],
-			isError: true,
-		};
-	},
-});
-
-/** List all linked worktrees in the current repo. */
-const gitWorktreeListTool = defineTool({
-	name: "git_worktree_list",
-	label: "Git Worktree List",
-	description: "List all linked worktrees in the current repo.",
-	parameters: listWorktreeParams,
-	async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
-		return {
-			content: [{ type: "text", text: "Error: git_worktree_list is not yet implemented. Suggestion: Use `git worktree list` manually until this tool is complete." }],
-			isError: true,
-		};
-	},
-});
-
-/** Switch pi's working directory to a linked worktree. */
-const gitWorktreeSwitchTool = defineTool({
-	name: "git_worktree_switch",
-	label: "Git Worktree Switch",
-	description: "Switch pi's working directory to a linked worktree.",
-	parameters: switchWorktreeParams,
-	async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
-		return {
-			content: [{ type: "text", text: "Error: git_worktree_switch is not yet implemented. Suggestion: Use the `/worktree` command or `git worktree` manually until this tool is complete." }],
-			isError: true,
-		};
-	},
-});
-
-/** Remove a linked worktree. */
-const gitWorktreeRemoveTool = defineTool({
-	name: "git_worktree_remove",
-	label: "Git Worktree Remove",
-	description: "Remove a linked worktree.",
-	parameters: removeWorktreeParams,
-	async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
-		return {
-			content: [{ type: "text", text: "Error: git_worktree_remove is not yet implemented. Suggestion: Use `git worktree remove` manually until this tool is complete." }],
-			isError: true,
-		};
-	},
-});
-
 // ─── Extension Entry Point ────────────────────────────────────────
 
 export default function (pi: ExtensionAPI) {
-	// Register tools
-	pi.registerTool(gitWorktreeCreateTool);
-	pi.registerTool(gitWorktreeListTool);
-	pi.registerTool(gitWorktreeSwitchTool);
-	pi.registerTool(gitWorktreeRemoveTool);
+	// Register tools (defined here to capture `pi` via closure)
+
+	/** Create a linked worktree for a branch in the current repo. */
+	pi.registerTool(defineTool({
+		name: "git_worktree_create",
+		label: "Git Worktree Create",
+		description: "Create a linked worktree for a branch in the current repo.",
+		parameters: createWorktreeParams,
+		async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
+			return {
+				content: [{ type: "text", text: "Error: git_worktree_create is not yet implemented. Suggestion: Use `git worktree add` manually until this tool is complete." }],
+				isError: true,
+			};
+		},
+	}));
+
+	/** List all linked worktrees in the current repo. */
+	pi.registerTool(defineTool({
+		name: "git_worktree_list",
+		label: "Git Worktree List",
+		description: "List all linked worktrees in the current repo.",
+		parameters: listWorktreeParams,
+		async execute(_toolCallId, _params, _signal, _onUpdate, ctx) {
+			const result = await pi.exec("git", ["worktree", "list"], { cwd: ctx.cwd });
+
+			if (result.exitCode !== 0) {
+				return {
+					content: [{ type: "text", text: `Error listing worktrees: ${result.stderr}. Suggestion: Ensure you are inside a git repository.` }],
+					isError: true,
+				};
+			}
+
+			const worktreeEntries = parseWorktreeList(result.stdout, ctx.cwd);
+
+			const displayLines = worktreeEntries.map(
+				(entry) => `${entry.branch} — ${entry.path}${entry.isCurrent ? " (current)" : ""}`,
+			);
+
+			return {
+				content: [{ type: "text", text: displayLines.join("\n") }],
+				details: { worktrees: worktreeEntries },
+			};
+		},
+	}));
+
+	/** Switch pi's working directory to a linked worktree. */
+	pi.registerTool(defineTool({
+		name: "git_worktree_switch",
+		label: "Git Worktree Switch",
+		description: "Switch pi's working directory to a linked worktree.",
+		parameters: switchWorktreeParams,
+		async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
+			return {
+				content: [{ type: "text", text: "Error: git_worktree_switch is not yet implemented. Suggestion: Use the `/worktree` command or `git worktree` manually until this tool is complete." }],
+				isError: true,
+			};
+		},
+	}));
+
+	/** Remove a linked worktree. */
+	pi.registerTool(defineTool({
+		name: "git_worktree_remove",
+		label: "Git Worktree Remove",
+		description: "Remove a linked worktree.",
+		parameters: removeWorktreeParams,
+		async execute(_toolCallId, _params, _signal, _onUpdate, _ctx) {
+			return {
+				content: [{ type: "text", text: "Error: git_worktree_remove is not yet implemented. Suggestion: Use `git worktree remove` manually until this tool is complete." }],
+				isError: true,
+			};
+		},
+	}));
 
 	// Register /worktree command
 	pi.registerCommand("worktree", {