The merged-tuning-catalog route moves to lib/routers/tunings.py, verbatim except
@app->@router, CONFIG_DIR->appstate.config_dir, and the two seam substrates it
needed:
- lib/appconfig.py — the pure config.json reader `_load_config` (used by ~11
server sites + future config-reading routers). server.py re-imports it, so
those call sites and any `server._load_config` test reference are unchanged.
- appstate.tuning_providers — the TuningProviderRegistry instance injected by
reference (a stable object mutated in place via register()/unregister()), so
the router reads the same registry plugins populate through plugin_context.
The instance stays defined in server.py, so `server.tuning_providers` still
resolves — zero test retargets.
The tuning constants (DEFAULT_REFERENCE_PITCH, TUNING_PRESET_MIDIS,
freqs_to_midis) already live in lib/tunings.py and are imported directly.
server.py: 6,960 -> 6,917.
Verified: pyflakes clean (bar the pre-existing unused `tuning_name` import);
route table IDENTICAL (143); full pytest 2400 passed (110 tuning/config cases);
eslint 0. Boot smoke: /api/tunings serves referencePitch + tunings + tuningMidis.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
