add taskcreate tool result formatter

Author: LasmarKhalifa

lib/roast/cogs/agent/providers/claude/tool_result.rb

@@ -230,6 +230,24 @@ def format_taskupdate
               ok_line(preview)
             end
 
+            # Formats a TaskCreate tool-result line.
+            #
+            # Content: the text the tool returned.
+            #
+            # Output: "TASKCREATE OK <preview>" – the first line of content,
+            # stripped and truncated to TRUNCATE_LIMIT chars. The preview is
+            # omitted when there is no content.
+            #
+            # Examples:
+            #   TASKCREATE OK Task created successfully
+            #   TASKCREATE OK
+            #
+            #: () -> String
+            def format_taskcreate
+              preview = truncate(content.to_s.lines.first.to_s.strip)
+              ok_line(preview)
+            end
+
             #: () -> String
             def format_unknown
               "UNKNOWN [#{tool_name}] OK #{tool_use_description}\n#{content}"

test/roast/cogs/agent/providers/claude/tool_result_test.rb

@@ -736,6 +736,54 @@ class Claude::ToolResultTest < ActiveSupport::TestCase
           assert_equal "TASKUPDATE OK #{"x" * (Claude::ToolResult::TRUNCATE_LIMIT - 3)}...", output
         end
 
+        test "format_taskcreate previews the first line of the result content" do
+          tool_use_message = Claude::Messages::ToolUseMessage.new(
+            type: :tool_use,
+            hash: { name: "taskcreate", input: {} },
+          )
+          tool_result = Claude::ToolResult.new(
+            tool_use: tool_use_message,
+            content: "  Task created successfully  \nadditional detail",
+            is_error: false,
+          )
+
+          output = tool_result.format
+
+          assert_equal "TASKCREATE OK Task created successfully", output
+        end
+
+        test "format_taskcreate reports a bare OK when there is no content" do
+          tool_use_message = Claude::Messages::ToolUseMessage.new(
+            type: :tool_use,
+            hash: { name: "taskcreate", input: {} },
+          )
+          tool_result = Claude::ToolResult.new(
+            tool_use: tool_use_message,
+            content: "",
+            is_error: false,
+          )
+
+          output = tool_result.format
+
+          assert_equal "TASKCREATE OK", output
+        end
+
+        test "format_taskcreate truncates a long preview" do
+          tool_use_message = Claude::Messages::ToolUseMessage.new(
+            type: :tool_use,
+            hash: { name: "taskcreate", input: {} },
+          )
+          tool_result = Claude::ToolResult.new(
+            tool_use: tool_use_message,
+            content: "x" * 60,
+            is_error: false,
+          )
+
+          output = tool_result.format
+
+          assert_equal "TASKCREATE OK #{"x" * (Claude::ToolResult::TRUNCATE_LIMIT - 3)}...", output
+        end
+
         test "ok_line renders a bare OK line when given no parts" do
           tool_use_message = Claude::Messages::ToolUseMessage.new(
             type: :tool_use,