v0.8.2

Bugfixes: Improved source file accounting for normalized networks. Improved PYPOWER bridge. null for a nonfinite float in the multiconductor payload. Distribution writer coverage for rated capacitor banks and unbalanced loads. No breaking API changes; two behaviors change in ways a consumer can observe, both below.

.pio.json moves to schema 0.2.1. serde_json writes a nonfinite f64 as null, so a package holding an unbounded rating or an unstated line length wrote a file the payload reader refused — the library could not read its own output. The reader now restores null per field: an upper bound reads as +Inf, a lower bound as -Inf, and a length as NaN, the PMD convention. The writer is unchanged, so 0.2.0 and 0.2.1 documents load in each other's readers, which is what the patch bump says. The published schema documents the null spelling and keeps every required key required; the multiconductor to balanced pass refuses a line whose length is not a finite number rather than scaling an impedance by NaN.

Solver table *_source_rows values change on an already-normalized input. NormalizedSolverTables used to rebuild provenance in solver_tables by re-simulating the normalize filter against the source network. The normalize pass now reports the rows itself through Network::to_normalized_with_source_rows, so there is one map instead of two that could drift, and it covers the star-lowered view the matrix builders read. For a raw case the values are unchanged. For a network already flagged SourceFormat::Normalized the old map was wrong — an out-of-service element and an isolated bus resolved to the wrong row or to none — and the new values are the identity. A consumer that stored provenance from 0.8.1 output for such a case resolves a dense row to a different source element after upgrading; regenerate it.

Distribution.

• Rated capacitor banks convert to OpenDSS. A DistCapacitor states q_rated at v_nom, which is what a dss Capacitor takes; banks were dropped with a warning before.
• A load whose phases carry different power emits as one single phase Load per terminal. A dss Load divides its kw evenly across its phases, so one balanced object kept the total and lost the profile. A delta load keeps the balanced form and says what was lost, since its phases sit across terminal pairs.
• A missing winding kv is derived from the bus voltage estimate instead of writing a NaN token, line level i_max maps to emergamps, and the BMOPF writer authors terminal_conventions from the network's own terminal naming when the block is absent.
• A refused OpenDSS include is an Error finding, so powerio convert and powerio package exit nonzero on a case whose Redirect escapes the case directory. The output is still written, for inspection. An include the OS refuses to open for an unrelated reason stays a warning.

Python.

• Network.to_ppc() and powerio.from_ppc(ppc) bridge a PYPOWER case dict, so a downstream server no longer hand builds the tables and hand serializes them back to MATPOWER text.
• The generator view carries caps, the MATPOWER gen columns past PMIN in column order, None where the source stated nothing.
• The MCP server runs on the mcp 2.0 SDK.

Repository. ruff, mypy, and stubtest gate the pure Python layer; a fuzz smoke run and the book tests gate every PR.

What's Changed

• Report source-row provenance from the normalize pass by @samtalki in #284
• ci: fuzz smoke, ruff, mypy, stubtest, and book tests by @samtalki in #285
• py: PYPOWER ppc bridge (Network.to_ppc, from_ppc) by @samtalki in #283
• mcp: port the server to the mcp 2.0 SDK by @samtalki in #286
• pkg: accept null for nonfinite floats in the multiconductor payload by @samtalki in #288
• cli: exit nonzero on a refused DSS include by @samtalki in #289
• dist: derive a missing winding kv, map line i_max to emergamps by @samtalki in #296
• dist: write rated capacitor banks and split unbalanced loads by @samtalki in #298
• chore: fold the duplication 0.8.2 left behind by @samtalki in #301
• Release 0.8.2 by @samtalki in #302

Full Changelog: v0.8.1...v0.8.2