* fix(#1747): register four search-provider keys in the config schema
buildNewProjectConfig emits seven search-provider availability flags and
research-provider.cts providerAvailability() consumes all seven, but only
three were registered in VALID_CONFIG_KEYS (config-schema.manifest.json).
config-loader.cts then printed an 'unknown config key(s)' warning for the
four unregistered keys (tavily_search, ref_search, perplexity, jina) on
every freshly generated .planning/config.json.
Register the four missing keys in the schema manifest and document them
alongside brave/exa/firecrawl in CONFIGURATION.md. Add a regression test
plus a structural drift guard that requires every config-driven
research-provider flag to be in VALID_CONFIG_KEYS, so a future provider
addition cannot silently reintroduce the drift.
* fix(#1747): move regression into owning test file + add changeset
lint-regression-test-names rejects new bug-NNNN-*.test.cjs files; move the
#1747 regression (four provider keys in VALID_CONFIG_KEYS + provider-flag
drift guard) into tests/bug-2530-valid-config-keys.test.cjs, the canonical
home for VALID_CONFIG_KEYS regressions, and delete the standalone file.
Add the missing .changeset fragment — config-schema.manifest.json lives
under gsd-core/ (user-facing), so changeset-lint requires a fragment.
* test(#1747): regenerate golden-install-parity fixtures for schema change
Adding four provider keys to config-schema.manifest.json shifts its shipped
content hash (65dea848 -> 7d398e94); recapture all 16 runtime fixtures via
UPDATE_GOLDEN=1. Each fixture changes exactly one line — the manifest hash.
fd576528a7