Eureka

Architecture

java/, scala/, python/, cpp/: solution trees + per-language build files.
automation/: Python CLI used by CI/CD.
.github/automation/targets.yml: language registry.
.github/automation/solution-actions.yml: PR title action labels.
data/problems.yml: generated problem catalog and cache.
sync-problem-catalog.yml: incremental update on master.
replay-problem-catalog.yml: manual full rebuild.
validate-repository.yml: lint, tests, compile/build checks.

Add a new root folder with its own buildable source layout.
Add one entry to .github/automation/targets.yml: language, label, code_language, path_prefix, path_glob.
Add the new path to .github/workflows/sync-problem-catalog.yml.
Add validation/build steps to .github/workflows/validate-repository.yml.
Keep solution files under the target path and commit them with solution(...).