Add comprehensive tests verifying that `uwf step show` produces valid
JSON output even when step detail nodes contain control characters
(newlines, tabs, carriage returns, etc.) in tool call args and content
fields.
Tests cover:
- Basic control characters (newlines, tabs, CR+LF)
- Backslashes and quotes
- Unicode control characters (U+0001-U+001F)
- Nested CAS refs with control characters
- Large steps with multiple tool calls
- Empty/null values
- YAML output format (unaffected by escaping)
The tests confirm that JSON.stringify() already handles control
character escaping correctly when serializing JavaScript objects
to JSON. No code changes needed - these tests serve as regression
guards to ensure the behavior remains correct.
Fixes#557
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
xiaoju
d8cba5eea0