- id: markdown_editor-external-T01 name: Set a welcome sentence canonical_type: markdown_editor implementation_source: external implementation_variant: uiw/react-md-editor implementation_component: 'External: @uiw/react-md-editor (textarea-based markdown editor with toolbar + preview)' task_template: enter_text secondary_template: null browsergym_goal: 'In the Markdown editor labeled “Project note”, replace the content with: Welcome to ComponentBench! The task will finish automatically when done.' ui_copy: 'In the Markdown editor labeled “Project note”, replace the content with: Welcome to ComponentBench! The task will finish automatically when done.' setup_description: | Layout: isolated_card centered in the viewport. Component: a single Markdown editor labeled “Project note”. Configuration: - Standard toolbar (Bold, Italic, Link, Quote, Code, List, Preview toggle, Clear). - Live typing updates the editor value immediately (no Save/Apply button in this task). - A small rendered preview area is visible below the editor (read-only) but is not required. Initial state: the editor is empty and focused only when clicked. Distractors: none (only a title and the editor card). Feedback: character counter updates as you type; no toasts. scene_context: &id001 theme: light spacing: comfortable layout: isolated_card placement: center scale: default instances: 1 guidance: text clutter: none difficulty: difficulty_bucket: easy tier: L0 axes_ratings: precision_requirement: 2 target_acquisition: 1 density_choice_interference: 1 depth_layering: 1 feedback_dynamics: 1 semantic_observability: 5 disambiguation_load: 1 justification: Single editor, no overlays, and the target text is short and fully visible as plain text. success_trigger: human_readable: - Editor markdown value equals the target after normalization (newline + trailing whitespace). - No extra confirmation is required (live value is checked). - Only one editor instance is present (no instance disambiguation). canonical_predicate: predicate_type: equals target_state: Welcome to ComponentBench! tolerance: normalize_newlines: true trim_trailing_whitespace: true trim_outer_blank_lines: true require_confirm: false confirm_control: null require_correct_instance: false target_instance_label_or_id: null terminal_condition: true value_source: editor_value negative_cases: - Leaving the editor blank or partially filled. - Extra characters (including extra punctuation) beyond the target sentence. - Correct text entered into a non-target element (there are no other editors in this task). expected_interaction_path: Click into the editor → type the sentence (or paste it) → stop when the content matches. notes: | Fallback source note: AntD/MUI/Mantine do not ship a core markdown editor component in this benchmark’s mapping, so this task uses an external implementation. Instrumentation: wrap each editor instance in a container with data-testid like 'md-editor-