Indexer ERD checklist

• Status: Accepted
• Date: 2026-01-25
• Context:
  • We need a complete, ordered, and trackable checklist for implementing ERD_INDEXERS.md.
  • The checklist must reflect dependencies, support test-first execution, and avoid missed requirements.
• Decision:
  • Add a dedicated ERD implementation checklist file that enumerates schema, procedures, services, behavior rules, and acceptance gates in dependency-first order.
  • Alternatives considered: keep ad-hoc notes or split by subsystem; rejected due to risk of omissions and loss of a single, authoritative implementation plan.
• Consequences:
  • Positive: a single source of truth for the ERD execution plan and validation steps.
  • Trade-off: requires maintenance when ERD_INDEXERS.md changes.
• Follow-up:
  • Keep ERD_INDEXERS_CHECKLIST.md synchronized with ERD_INDEXERS.md updates.
  • Use the checklist as the staging plan for implementation and testing phases.

Task record

• Motivation:
  • Ensure ERD_INDEXERS.md is implementable without missing steps or violating architecture rules.
• Design notes:
  • The checklist is dependency-first and grouped by schema, procedures, runtime services, and acceptance gates to maximize testability.
• Test coverage summary:
  • No tests added in this change; checklist calls out required test gates for future work.
• Observability updates:
  • No runtime changes in this change; checklist enumerates required telemetry and metrics work.
• Risk & rollback plan:
  • Risk is limited to documentation drift; rollback is deleting the checklist and ADR entry.
• Dependency rationale:
  • No new dependencies added. Alternatives considered: none required.