Files

glm-5.1 67ccfbf928 docs: restructure architecture docs to flowgraph pattern

- Create decisions/ directory with 32 numbered ADRs (ADR-001 through ADR-032)
  extracted from inline DD/SD/ED/SE decision sections
- Create open-questions.md with 16 OQs organized by theme, cross-referenced
  to ADRs, with status tracking (resolved/open)
- Create README.md as architecture index with doc table, ADR table, and
  lifecycle status definitions (draft/reviewed/stable/deprecated)
- Replace inline decision sections in all spec docs with ADR reference tables
- Replace inline open questions with OQ references to centralized tracker
- Update frontmatter: metagraph-module.md, overview.md, sqlite-host.md → reviewed;
  schema-evolution.md and encrypted-data.md remain draft
- DD1-DD10 → ADR-009 through ADR-018
- D1-D8 → ADR-001 through ADR-008
- SD1-SD5 → ADR-019 through ADR-023 (SD5 folded into ADR-006/008)
- ED1-ED5 → ADR-023 through ADR-027
- SE1-SE5 → ADR-028 through ADR-032

2026-05-29 07:19:03 +00:00

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ADR-019: JSON text for schema columns in SQLite

Status

Accepted

Context

SQLite stores JSON as text with { mode: "json" }. PostgreSQL uses native jsonb. The choice affects queryability and validation behavior.

Decision

SQLite uses text with JSON mode for schema, config, attributes, metadata, and allowedSourceTypes/allowedTargetTypes columns. JSON validation relies on application-level TypeBox schemas, not database constraints. SQLite is for spokes (local, infrequent queries); PostgreSQL is for the hub (frequent, complex queries where jsonb queryability matters).

Consequences

SQLite cannot efficiently query inside JSON columns (no GIN indexes)
All JSON validation is application-level (Value.Check)
PostgreSQL gets queryability benefits from jsonb when implemented
The dual-host strategy is appropriate: SQLite for local infrequent access, PG for hub-level querying

References

sqlite-host.md

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