openapi json export - #30
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A BRANCH record whose CKT is prefixed '@' or '*' is a breaker or switch, and _split_breakers_and_branches! routes it to SWITCHES_AS_BRANCHES. The RAW System Switching Device record carries only a reactance below the zero-impedance threshold -- it has no GI/BI/GJ/BJ columns at all -- and a breaker or disconnect has no line-connected reactor or capacitor to describe. A switching-device row carrying line shunts is therefore malformed input. That admittance was previously dropped without a trace. Each non-zero end now becomes a shunt at the bus it was declared on, and the relocation is warned about rather than silent: a branch with real line shunts is a transmission line, not a breaker or switch, so the source data is worth checking. GI/BI/GJ/BJ are pu on the system base -- a BRANCH record declares no MVA base of its own, unlike a transformer winding with its SBASE1-2 -- while a FIXED SHUNT's GL/BL are MW/MVAr at unity voltage and _make_per_unit! divides every shunt gs/bs by the case base. The value is scaled by baseMVA so that division lands back on the declared pu value. The shunt inherits the device's ST because the RAW defines these shunts as "connected to and switched with the line". The salvage runs before _build_switch_breaker_sub_data, which pops I and J.
These are Claude Code working notes, not project documentation, and should never be committed.
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The 12 copies of this file across the psy6 workspace had drifted into 6 distinct versions. Its content now lives in the user-scope `sienna-psy6` skill, which loads on invocation instead of being read in full every session.
The lowercase name only loaded because macOS is case-insensitive; on Linux and in CI the file was silently ignored. Pure rename, no content change.
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This is a first pass at populating the OpenAPIModels from the PowerFlowParser