The gsd-intel-updater agent writes file-roles.json, api-map.json,
dependency-graph.json, arch-decisions.json, and stack.json. But
INTEL_FILES in intel.cjs declared files.json, apis.json, deps.json,
arch.md, and stack.json. Only stack.json matched. Every query/status/
diff/validate call iterated INTEL_FILES and found nothing, reporting
all intel files as missing even after a successful refresh.
Update INTEL_FILES to use the agent's actual filenames. Remove the
arch.md special-case code paths (mtime-based staleness, text search,
.md skip in validate) since arch-decisions.json is JSON like the rest.
Update all intel tests to use the new canonical filenames.
Closes#2205
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>