fix: prevent traces with same net name from incorrectly connecting #102
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Fixes tscircuit/core#1498 ## Problem Schematic traces with the same net name (e.g., "GND") were incorrectly jumping/connecting to each other even when they weren't part of the same electrical connection. ## Root Cause The `getConnectivityMapsFromInputProblem` function was using user-provided net IDs as grouping keys, causing all connections with the same net name to be merged into a single connectivity island. ## Solution Use unique synthetic net IDs (`dc_0`, `dc_1`, `nc_0`, etc.) for each connection entry instead of the user-provided net names. This ensures pins are only considered connected if they are explicitly listed in the SAME directConnection or SAME netConnection entry. ## Changes - Each directConnection now gets a unique ID: `dc_${index}` - Each netConnection now gets a unique ID: `nc_${index}` - netConnections that share a pin with an existing directConnection properly extend that connection - Added 5 test cases to verify the fix 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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techmannih
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Dec 27, 2025
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Summary
Fixes tscircuit/core#1498 - Schematic traces with the same net name were incorrectly jumping/connecting to each other.
Root cause: The
getConnectivityMapsFromInputProblemfunction was using user-provided net IDs (like "GND") as grouping keys, causing all connections with the same net name to be merged into a single connectivity island.Fix: Use unique synthetic net IDs (
dc_0,dc_1,nc_0, etc.) for each connection entry. Pins are now only considered connected if explicitly listed in the SAME connection entry.Changes
lib/solvers/MspConnectionPairSolver/getConnectivityMapFromInputProblem.ts: Core fixtests/solvers/MspConnectionPairSolver/MspConnectionPairSolver_sameNetIdNoMerge.test.ts: 5 new test casesTest plan
bunx tsc --noEmit)bun test)/attempt #1498
🤖 Generated with Claude Code