red/.planning/phases/08-schema-foundation-and-signing-page-safety/08-01-SUMMARY.md

phase, plan, subsystem, tags, dependency_graph, tech_stack, key_files, decisions, metrics

phase	plan	subsystem	tags	dependency_graph	tech_stack	key_files	decisions	metrics
08-schema-foundation-and-signing-page-safety	01	schema	schema typescript drizzle field-types backward-compat	requires provides affects SignatureFieldType union type getFieldType() helper function isClientVisibleField() predicate function Drizzle migration snapshot 0006 teressa-copeland-homes/src/lib/db/schema.ts teressa-copeland-homes/drizzle/meta/_journal.json	added patterns TypeScript union type discriminant for JSONB field data Backward-compatible optional field with coalescing helper	created modified teressa-copeland-homes/drizzle/0006_type_discriminant.sql teressa-copeland-homes/drizzle/meta/0006_snapshot.json teressa-copeland-homes/src/lib/db/schema.ts teressa-copeland-homes/drizzle/meta/_journal.json	SignatureFieldType field on SignatureFieldData is optional to preserve backward-compat with v1.0 documents that have no type in their JSONB data getFieldType() coalesces field.type ?? 'client-signature' so all v1.0 documents resolve as client-signature without any data migration isClientVisibleField() returns false only for agent-signature — all other types (including undefined/legacy) are visible to client Migration 0006 has no DDL — .$type<T>() is TypeScript-only; snapshot and journal updated manually since Drizzle declined to generate (no DDL changes) db:migrate skipped — database unavailable in dev environment; migration is a no-op and presents no risk	duration completed tasks_completed files_modified 2 min 2026-03-21 2 4

Phase 8 Plan 01: Schema Foundation — SignatureFieldType Discriminant Summary

One-liner: TypeScript-only schema discriminant adding SignatureFieldType union, optional type field on SignatureFieldData, and two backward-compatible helper exports (getFieldType, isClientVisibleField).

What Was Built

Extended teressa-copeland-homes/src/lib/db/schema.ts with three additions required by all Phase 9-13 field-type features:

1. SignatureFieldType union type — six literals: 'client-signature' | 'initials' | 'text' | 'checkbox' | 'date' | 'agent-signature'

2. SignatureFieldData.type? field — optional field on the existing interface; v1.0 documents with no type continue to work without data migration

3. getFieldType(field) helper — always returns a SignatureFieldType, coalescing field.type ?? 'client-signature'; prevents scattered field.type ?? 'client-signature' patterns across call sites

4. isClientVisibleField(field) predicate — returns false for agent-signature only, used by the signing page filter added in Plan 08-02

Created drizzle/0006_type_discriminant.sql (empty SQL — no DDL) and updated drizzle/meta/_journal.json and drizzle/meta/0006_snapshot.json to keep the Drizzle migration chain in sync.

Commits

Task	Commit	Files
1: Extend schema.ts	2dd1b61	src/lib/db/schema.ts
2: Migration snapshot	b5f8b62	drizzle/0006_type_discriminant.sql, drizzle/meta/0006_snapshot.json, drizzle/meta/_journal.json

Deviations from Plan

Manual migration file creation

Found during: Task 2

Issue: npm run db:generate reported "No schema changes, nothing to migrate" because SignatureFieldType is a TypeScript-only change (.$type<T>() annotation) with no DDL. Drizzle does not create a migration file when there are no DDL changes.

Fix: Created drizzle/0006_type_discriminant.sql (comment-only, no SQL), drizzle/meta/0006_snapshot.json (DDL state identical to 0005), and updated _journal.json manually. This matches the plan's stated intent: "The SQL content will be empty or contain only a comment — that is CORRECT and expected."

Files modified: drizzle/0006_type_discriminant.sql (created), drizzle/meta/0006_snapshot.json (created), drizzle/meta/_journal.json (updated)

Rule: Rule 3 — Auto-fix blocking issue (Drizzle would not auto-generate the required file)

db:migrate not applied

Found during: Task 2

Issue: npm run db:migrate failed with "url: undefined" — no database connection string configured in environment.

Resolution: Noted in summary as planned. The plan explicitly states this is acceptable: "DO NOT block plan completion — the TypeScript changes are the deliverable." Migration is a no-op (empty SQL) and presents no risk.

Self-Check: PASSED

Files exist:

• FOUND: teressa-copeland-homes/src/lib/db/schema.ts
• FOUND: teressa-copeland-homes/drizzle/0006_type_discriminant.sql
• FOUND: teressa-copeland-homes/drizzle/meta/0006_snapshot.json

Commits exist:

• FOUND: 2dd1b61 feat(08-01): extend SignatureFieldData with type discriminant and helper exports
• FOUND: b5f8b62 chore(08-01): add Drizzle migration snapshot for TypeScript-only schema change

TypeScript compilation: PASS (npx tsc --noEmit exits 0)