agent: clean up and optimize code

- Fix typo in REPL info message.
- Optimize Recorder to avoid unnecessary allocations.
- Simplify field type detection in SlashCommand using stringToEnum.
- Remove unused yellow ANSI constant in Terminal.
- Shorten log message in McpServer.

src/agent/Agent.zig

@@ -280,7 +280,7 @@ fn runOneShot(self: *Self, task: []const u8) bool {
 
 fn runRepl(self: *Self) void {
     self.terminal.printInfo("Lightpanda Agent (type '/quit' to exit)");
-    self.terminal.printInfo("Tab completes/cycles throuch commands; the dim grey ghost shows the first match.");
+    self.terminal.printInfo("Tab completes/cycles through commands; the dim grey ghost shows the first match.");
     log.debug(.app, "tools loaded", .{ .count = self.tools.len });
     if (self.ai_client) |ai_client| {
         self.terminal.printInfoFmt("Provider: {s}, Model: {s}", .{ @tagName(std.meta.activeTag(ai_client)), self.model });

src/agent/McpServer.zig

@@ -100,7 +100,7 @@ pub fn handleToolCall(self: *Self, arena: std.mem.Allocator, req: protocol.Reque
     if (args.attachments) |paths| {
         for (paths) |p| {
             if (!isAttachmentPathSafe(p)) {
-                log.warn(.mcp, "rejected unsafe attachment path", .{ .path = p });
+                log.warn(.mcp, "unsafe attachment path", .{ .path = p });
                 return self.transport.sendError(
                     id,
                     .InvalidParams,

src/agent/Recorder.zig

@@ -49,9 +49,9 @@ pub fn record(self: *Self, cmd: Command.Command) void {
 pub fn recordComment(self: *Self, comment: []const u8) void {
     const f = self.file orelse return;
     const prefix: []const u8 = if (self.needs_separator) "\n# " else "# ";
-    const line = std.fmt.allocPrint(self.allocator, "{s}{s}\n", .{ prefix, comment }) catch return;
-    defer self.allocator.free(line);
-    _ = f.write(line) catch return;
+    f.writeAll(prefix) catch return;
+    f.writeAll(comment) catch return;
+    f.writeAll("\n") catch return;
     self.needs_separator = true;
 }
 

src/agent/SlashCommand.zig

@@ -93,12 +93,7 @@ fn fieldTypeOf(value: std.json.Value) FieldType {
     if (value != .object) return .other;
     const ty = value.object.get("type") orelse return .other;
     if (ty != .string) return .other;
-    const s = ty.string;
-    if (std.mem.eql(u8, s, "string")) return .string;
-    if (std.mem.eql(u8, s, "integer")) return .integer;
-    if (std.mem.eql(u8, s, "number")) return .number;
-    if (std.mem.eql(u8, s, "boolean")) return .boolean;
-    return .other;
+    return std.meta.stringToEnum(FieldType, ty.string) orelse .other;
 }
 
 pub fn findSchema(schemas: []const SchemaInfo, name: []const u8) ?*const SchemaInfo {

src/agent/Terminal.zig

@@ -12,7 +12,6 @@ const ansi_bold = "\x1b[1m";
 const ansi_dim = "\x1b[2m";
 const ansi_cyan = "\x1b[36m";
 const ansi_green = "\x1b[32m";
-const ansi_yellow = "\x1b[33m";
 const ansi_red = "\x1b[31m";
 
 history_path: ?[:0]const u8,