When a tool call fails, claude wraps the result text in
<tool_use_error>...</tool_use_error> XML tags. The terminal was
displaying these raw, producing output like:
'<tool_use_error>File has not been read yet.</tool_use_error>'
Fix renderToolResult in app.js:
- Check c.is_error on the tool_result content block.
- Strip the <tool_use_error>...</tool_use_error> wrapper from the text.
- Render error results with a '✗' prefix under '.tool-result.error'
(flat, ≤120c) or '.tool-result-block.error' (<details>, longer text).
Add .live .tool-result.error { color: var(--red); } to terminal.css
so error results are visually distinct (red, same as turn-end-fail).
Update terminal-rendering.md row taxonomy to document the two new
error row classes.
Closes#2104.
57f936af63