CalVer per project convention: the date communicates when the router was last
validated against the reference FreeRouting engine and real KiCad output. The
Alpha classifier and README carry the maturity signal.
Add the GPLv3 text (the package declared the licence but never shipped it),
a py.typed marker, and an sdist include/exclude allowlist so the distribution
carries only src/, docs/, README, LICENSE and pyproject. reference/ is a clone
of the GPL FreeRouting Java tree kept purely as a porting reference and must
never be redistributed inside this package; tests, caches and build output are
excluded too.
Switch to the PEP 639 SPDX licence expression with license-files, widen the
classifiers, and add an -o alias for -do. Rewrite the README around the engine
matrix: what each track and pass actually does, and what this is not (no
FreeRouting density parity on dense boards, and --diagonal is a recovery and
shortening pass, not a diagonal-native search).
FreeRouting ships no unit tests for its geometry/router, so there is no
value-level oracle to port against. This adds a dev/test-only harness that runs
the reference JAR to route a DSN, letting freeroute's output be diffed against
the reference implementation — the router phase will assert connectivity parity
(same nets routed) via routed_net_set().
- tests/oracle.py: locate Java 21+ and a freerouting JAR (env overrides:
FREEROUTE_ORACLE_JAVA, FREEROUTING_JAR), route a DSN, and extract routed
connectivity from the SES. requires_oracle skips when no JVM/JAR is present,
so the suite stays Java-free.
- tests/test_oracle.py: routes a routable board end-to-end and checks the
connectivity extraction.
- tests/dsn/fixtures/kicad_routable.dsn: a real KiCad pcbnew-exported DSN
(Arduino_Mega template, path sanitized) that actually routes — the smd_demo
fixture leaves its nets unrouted.
- pyproject: pythonpath=["tests"] so the harness imports as `oracle`.
Pure-Python PCB autorouter replacing the freerouting.jar step in kicad-mcp.
Contract is Specctra DSN in, SES out — a drop-in for the JAR so the toolchain
needs no JVM. Includes pyproject (uv/ruff/pytest, src-layout) and a porting
plan seeded for study of the upstream FreeRouting Java source.
