Add HL7 message comparison (field-level diff) - #1
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Compare two HL7 messages field-by-field with named addresses and status indicators (modified/A-only/B-only). Implemented across all interfaces: core diff module with 21 tests, CLI --diff flag, MCP hl7_diff tool, and web viewer Compare tab with summary bar, filter toggle, and side-by-side component breakdown in the detail panel. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
The collapsed input area after comparing was only clearable via the small toolbar indicator. Now there's a visible Reset button in the summary bar to clear the comparison and return to the input area. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Highlight the exact changed characters within modified field values using smart truncation that keeps the diff region visible even in long values. Applied in the web diff table, detail panel (raw + component breakdown), and CLI terminal output (ANSI inverse). Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
--diffflag, and MCPhl7_difftoolhl7view/diff.pywith 21 new tests (63 total, all passing)What's included
hl7view file1.hl7 file2.hl7 --diff(add-eto include identical fields)hl7_diff(message_a, message_b)returns structured JSON diffTest plan
venv/bin/pytest tests/ -v— 63 tests pass🤖 Generated with Claude Code