Summary

Step 2 of constructive-io/constructive-planning#1271 (follows #315, which freed the name): moves constructive-db's transform-schemas into this monorepo as the new @pgsql/transform at 18.2.0 (continuing the 18.x line).

What moved (verbatim, minus path/doc tweaks):

• transform.ts — transformSql: schema-name rewriting across DDL/DML/grants/policies/comments and inside PL/pgSQL bodies (hydrated via plpgsql-parser)
• facts.ts — classifyStatements / StatementFacts: per-statement kind + creates/references/referencedSchemas/roles/fkTargets/securityRelevant/securityDefiner/dynamicSql
• qualify.ts — qualifyUnqualified + inventory helpers
• categorize.ts — CategoryProfile / TIER_PROFILE / buildCategoryOf
• fixture-closure.ts — resolveFixtureClosure transitive dependency closure
• round-trip-core.ts / round-trip.ts — dependency-free normalizeTree/cleanTree engine + mutation-aware round-trip validation
• All 6 test suites (174 tests), __fixtures__ golden files, and the make-fixtures / scan-corpus / hunt-plpgsql-bugs scripts

Deliberately not moved: bundle-driver.ts (makeSchemaTranspiler / makeNamespaceValidator) — it depends on @pgpmjs/bundle and would invert layering; it relocates to the constructive repo in a follow-up. index.ts drops only those exports; everything else is unchanged.

Deps are all workspace-internal: @pgsql/quotes, @pgsql/traverse, plpgsql-parser (published deps ^18.x become workspace:*). Lockfile updated with a minimal hand-added importer block (full pnpm install rewrites the file due to formatting drift; pnpm install --frozen-lockfile verified green with pnpm 9 / node 20 as in CI).

Also: added @pgsql/transform to the CI test matrix, and package tables in README.md / AGENTS.md. Package README notes the old version-upgrade transformer now lives at @pgsql/transform-ast.

Verified locally: build + all 174 tests pass. Note: pnpm lint fails repo-wide on main too (ESLint 9 installed with legacy .eslintrc.json) — pre-existing, untouched here.

Follow-ups tracked in the planning issue: consume from constructive-db (delete transform-schemas, relocate bundle-driver), and redo the pgpm slicer-closure prototype on this package.

Link to Devin session: https://app.devin.ai/sessions/1aa52746e60c4df38ef2678d168269b9
Requested by: @pyramation