| name | tool-validation |
| description | Behaviour harness for the 8 ASCII Canvas drawing tools. Use when changing tools, canvas interaction, border styles, or when AGENTS.md tool checklist applies.
|
Tool Validation Skill
Behaviour-harness methodology for the 8 drawing tools. Complements computational sensors (verify / E2E). See agents-docs/harness.md.
Verification Checklist
1. Select Tool (V)
- Selection: Dragging should show a semi-transparent blue highlight.
- Move: Clicking inside an active selection and dragging should move the content.
- Delete: Pressing
Delete or Backspace while a selection is active should clear the region.
2. Rectangle Tool (R)
- Drawing: Dragging should preview a box with the current border style.
- Commit: Releasing the mouse should commit the rectangle to the grid.
3. Line Tool (L)
- Drawing: Supports horizontal, vertical, and diagonal lines.
- Direction: Should respect "Auto", "Horizontal", or "Vertical" overrides if set.
4. Arrow Tool (A)
- Head: Should draw a directional arrowhead (▲▼◄►) at the end of the line.
- Overlap: The arrowhead must not be overwritten by the line character.
5. Diamond Tool (D)
- Shape: Should draw a rhombus using diagonal lines (╱╲).
- Small Shapes: Should fallback to
◆ for single-point or very small drags.
6. Text Tool (T)
- Input: Clicking on the canvas should set a cursor.
- Typing: Alphanumeric keys should appear at the cursor.
- Controls:
Enter (newline), Backspace (delete previous), and Delete (delete current) must work.
7. Freehand Tool (F)
- Style: Must use the character associated with the current Border Style (e.g.,
· for Single, * for ASCII).
- Interpolation: Drawing fast should still produce a continuous line.
8. Eraser Tool (E)
- Function: Should clear cells within its radius to spaces.
- Bounds: Must not emit operations outside the grid coordinates.
Automation
Use the provided Playwright scripts in e2e/tools-drawing.spec.ts for automated regression testing.
