TML-3229: register the Mongo attribute namespace and diagnose unknown attributes

[StevenMcClankerton]

Linked issue

Refs TML-3229 — slice mongo-attributes-registered of the attribute-registry project (parent TML-3226); builds on the registry machinery merged in #30154. Runs in parallel with the SQL (TML-3228) and block-attribute (TML-3230) slices.

At a glance

// packages/2-mongo-family/2-authoring/contract-psl/src/mongo-attribute-specs.ts
export const mongoAttributeSpecs = {
  model: {
    map: staticModelSpec(mapModelSpec),
    discriminator: staticModelSpec(discriminatorModelSpec),
    base: staticModelSpec(baseModelSpec),
    index: (ctx) => buildIndexModelSpec('index', modelFieldElement(ctx)),
    unique: (ctx) => buildIndexModelSpec('unique', modelFieldElement(ctx)),
    textIndex: (ctx) => buildTextIndexModelSpec(modelFieldElement(ctx)),
  },
  field: {
    id: staticFieldSpec(idFieldSpec),
    unique: staticFieldSpec(uniqueFieldSpec),
    map: staticFieldSpec(mapFieldSpec),
    relation: staticFieldSpec(relationFieldSpec),
  },
} as const satisfies AttributeSpecNamespace;

$ pnpm emit   # examples/retail-store, with `status ProductStatus @default(Active)` in the schema
PSL_UNSUPPORTED_FIELD_ATTRIBUTE: Field "Product.status" uses unsupported attribute "@default" (./src/contract.prisma:74:32)

Before this PR the Mongo interpreter imported loose spec constants at each call site, had no spec at all for @id / @unique (presence checks only), and dropped any attribute it did not recognise without a word — the @default(Active) above emitted fine and did nothing.

Decision

This PR ships the Mongo half of central attribute registration:

1. One namespace for every Mongo built-in. mongoAttributeSpecs registers @@map, @@discriminator, @@base, @@index, @@unique, @@textIndex, @id, @unique, @map, @relation as spec factories over the uniform AttributeSpecContext. The per-model index specs, which need the model's field names for their sort arms, are ordinary factories reading ctx.model.fields — no special case.
2. The interpreter sources every spec from it. Each call site invokes the factory with a context built from the symbol table, the current model, and the control mutation-default registry, which the interpreter input now requires and the provider threads from ContractSourceContext.
3. The family contributes it. mongoFamilyDescriptor and mongoFamilyPack carry authoring.attributeSpecs, so assembleAttributeSpecs in the language-server process enumerates the same objects the interpreter runs.
4. Unknown attribute names diagnose. Model attributes not in the namespace fail with PSL_UNSUPPORTED_MODEL_ATTRIBUTE; attributes on model fields and composite-type fields fail with PSL_UNSUPPORTED_FIELD_ATTRIBUTE, each with the attribute's span. @default, @updatedAt, and @db.* carry a hint saying Mongo never lowers them and the attribute should be deleted.
5. Upgrade entry. skills/prisma-8/upgrading/app/upgrades/8.0.0-rc.8-to-8.0.0-rc.9/instructions.md gains mongo-unlowered-attributes-are-rejected (detection over *.prisma for those three attributes; prose: delete them on Mongo schemas). Validated by execution against examples/ restored from origin/main.

Reviewer notes

• Behaviour change for users: Mongo schemas carrying @default, @updatedAt, @db.*, or a typo now fail contract emit instead of silently losing the attribute. Four schemas in the repo relied on the old behaviour — examples/retail-store/src/contract.prisma plus its two migration snapshots (@default(Active) / @default("active")) and the legacy-aggregate-raw port fixture (@default(now()), @updatedAt). The attributes never reached the emitted contract, so removing them changes no contract.json; pnpm fixtures:check confirms.
• @id / @unique now reject arguments (PSL_INVALID_ATTRIBUTE_SYNTAX) and an @id("x") no longer counts as the model's id. No repo fixture declares either with arguments.
• New production edge @internal/family-mongo → @internal/mongo-contract-psl. The family layer sits above authoring in architecture.config.json's layerOrder.mongo; pnpm lint:deps is clean. The pack and descriptor expose the namespace through the erased core type AuthoringAttributeSpecContributions, otherwise the public @prisma/orm-family-mongo declaration would inline psl-parser type names it cannot export (TS4023, caught by examples/bundle-size).
• The unknown-name check reads the family's own namespace, not the assembled view. The assembled view would only add target-contributed model attributes, and the Mongo interpreter has no ADR-236 lowering loop, so accepting such a name would parse and never lower. When that loop exists the check should move to assembleAttributeSpecs(...) keys.
• Interpreter input change: InterpretPslDocumentToMongoContractInput.controlMutationDefaults is required (no ?? new Map() fallback). Eleven test call sites gained the key; the provider is the only production caller.
• Project artefacts under projects/attribute-registry/ (slice spec, plan, trace, manual-QA script and report) are included per the drive workflow and are removed at project close-out.

How it fits together

1. Specs for the gaps. idFieldSpec / uniqueFieldSpec are nullary fieldAttribute specs; collectIndexes and the id check interpret them instead of getAttribute presence checks.
2. Namespace. Static specs stay module constants behind staticModelSpec / staticFieldSpec (identity-stable, typed over the right ctx level); the three index specs become (ctx) => … factories replacing buildIndexModelSpecs(fieldNames). InferAttr<ReturnType<typeof mongoAttributeSpecs.model.index>> keeps the interpreter's NormalIndexArgs / TextIndexArgs typing with no cast.
3. Call sites. interpretPslDocumentToMongoContract builds one AttributeSpecContext per model (specContextFor) and threads it to resolveCollectionName, resolveFieldMappings, collectPolymorphismDeclarations, collectIndexes, and the relation/id sites; field-level factories receive { ...specContext, field }.
4. Registration. Descriptor + pack add attributeSpecs; a family test asserts assembleAttributeSpecs(assembleAuthoringContributions([component])) equals the namespace by identity, and the integration test resolves a Mongo project through resolveConfigInputs and enumerates the full key set from the LSP side.
5. Diagnostics last. reportUnknownAttributes runs once per document over models, model fields, and composite-type fields, so the diagnostic only ever compares against a complete registry.

Behavior changes & evidence

• @id / @unique are interpreted against specs; arguments diagnose. Implementation: packages/2-mongo-family/2-authoring/contract-psl/src/mongo-attribute-specs.ts, packages/2-mongo-family/2-authoring/contract-psl/src/interpreter.ts. Evidence: packages/2-mongo-family/2-authoring/contract-psl/test/interpreter.attribute-specs.test.ts.
• Every factory yields a spec whose level matches its subkey and whose name matches its key. Evidence: packages/2-mongo-family/2-authoring/contract-psl/test/mongo-attribute-specs.test.ts.
• The family's full attribute surface is enumerable from the assembled registry, in-process and from a resolved language-server project. Implementation: packages/2-mongo-family/9-family/src/core/control-descriptor.ts, packages/2-mongo-family/9-family/src/exports/pack.ts. Evidence: packages/2-mongo-family/9-family/test/attribute-specs.test.ts, test/integration/test/authoring/attribute-specs.lsp-consumability.test.ts.
• Unknown model / field / composite-field attribute names (including dotted @db.ObjectId) fail emission with a located diagnostic. Implementation: packages/2-mongo-family/2-authoring/contract-psl/src/interpreter.ts (reportUnknownAttributes). Evidence: packages/2-mongo-family/2-authoring/contract-psl/test/interpreter.attribute-specs.test.ts; manual run in projects/attribute-registry/manual-qa-reports/2026-08-28-mongo-attributes-registered.md.

Testing performed

• pnpm --filter @internal/mongo-contract-psl typecheck lint test — 184 tests
• pnpm --filter @internal/family-mongo typecheck lint test — 175 tests
• pnpm build && pnpm typecheck && pnpm test:packages && pnpm lint:deps on the final HEAD — test:packages reported 6 timeouts (adapter-postgres migration tests at 100 ms / 8 s budgets, one cli-telemetry e2e, one family-mongo verify) on a host at load average ~25 while three slices built concurrently; every one of them passes when its package is run alone on the same HEAD
• pnpm fixtures:check — no emitted-artifact drift after the four contract.prisma edits
• pnpm check:upgrade-coverage --mode pr --prev origin/main — exit 0
• pnpm --filter integration-tests test test/authoring/attribute-specs.lsp-consumability (4) and test/ports/prisma/functional/legacy-aggregate-raw (2)
• Manual: pnpm emit in examples/retail-store with an injected @@shardKey, @default, and @db.ObjectId — each fails with the expected code, message, and location; the clean schema emits with no diff

Skill update

n/a — no user-facing skill under packages/0-shared/skills/ exists in this repo; the new diagnostics reuse existing error codes and are documented in packages/2-mongo-family/2-authoring/contract-psl/README.md.

Follow-ups

None.

Alternatives considered

• Registering @default / @updatedAt as accepted-and-ignored specs to keep the four schemas emitting unchanged. Rejected: registration means "this family implements it"; Mongo has no default-value lowering, so the honest behaviour is a diagnostic.
• Checking unknown names against the assembled registry. Rejected for now: it would accept target-contributed model attributes the Mongo interpreter cannot lower (no ADR-236 loop). Documented as the move to make when that loop lands.
• An optional controlMutationDefaults with an empty-registry fallback (the SQL interpreter's current shape). Rejected: a caller that forgets the registry would hand factories a silently empty one; a required key makes the omission a type error.
• A runtime wrong-level guard in the assembler. Rejected: a model factory is intentionally assignable where a field factory is expected (contravariant ctx widening); the family test that invokes every factory and checks spec.level is the whole guard.

Checklist

• All commits are signed off (git commit -s) per the DCO.
• I read CONTRIBUTING.md and the change is scoped to one logical concern.
• Tests are updated.
• The PR title is in TML-NNNN: <sentence-case title> form.
• The Skill update section above is filled in.

Summary by CodeRabbit

• New Features

  • Added MongoDB attribute specifications for model- and field-level schema definitions.
  • Exposed MongoDB attribute metadata for authoring and tooling integrations.

• Bug Fixes

  • Added diagnostics for unsupported or incorrectly configured MongoDB attributes.
  • Product status values must now be explicitly provided instead of using an implicit default.
  • Updated sample and test schemas to require explicit field configuration.

• Documentation

  • Documented supported MongoDB attributes and authoring integration.
  • Added upgrade guidance for removing unsupported defaults, update markers, and native-type attributes.

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📝 Walkthrough

Walkthrough

The Mongo PSL interpreter now uses a context-aware attribute registry, reports unsupported attributes, and exposes registered specifications through Mongo family authoring configuration. Upgrade guidance and fixtures remove unsupported Mongo defaults and automatic timestamp attributes.

Changes

Mongo attribute specifications

Layer / File(s)	Summary
Attribute registry and contracts packages/2-mongo-family/2-authoring/contract-psl/README.md, packages/2-mongo-family/2-authoring/contract-psl/src/*, packages/2-mongo-family/2-authoring/contract-psl/test/mongo-attribute-specs.test.ts	Mongo model and field attributes are grouped in the exported mongoAttributeSpecs registry.
Context-aware PSL interpretation packages/2-mongo-family/2-authoring/contract-psl/src/interpreter.ts	The interpreter builds AttributeSpecContext values, uses registry factories, and reports unsupported attributes with targeted hints.
Family authoring wiring packages/2-mongo-family/9-family/*, packages/2-mongo-family/2-authoring/contract-psl/src/provider.ts	The Mongo family descriptor and pack expose the registry. The provider passes control mutation defaults to the interpreter.
Interpreter and integration validation packages/2-mongo-family/2-authoring/contract-psl/test/*, packages/3-extensions/mongo/test/*, packages/3-mongo-target/1-mongo-target/test/*, test/integration/test/{authoring,mongo,value-objects}/*	Tests validate registered attributes, diagnostics, factory metadata, family assembly, and updated interpreter inputs.
Upgrade guidance and fixture updates skills/prisma-8/upgrading/app/upgrades/8.0.0-rc.8-to-8.0.0-rc.9/instructions.md, examples/retail-store/**, test/integration/test/ports/prisma/functional/legacy-aggregate-raw/_fixture/contract.prisma	Upgrade instructions detect unsupported Mongo attributes. Example schemas remove defaults and automatic timestamp attributes.

Priority: ➖ Normal — Schedule the Mongo authoring change because it centralizes attribute registration and adds diagnostics for unsupported schema attributes across interpreter, family exposure, upgrades, and integration tests.

Estimated code review effort: 4 (Complex) | ~45 minutes

Severity of issue fixed: Medium

Merge Risk: 🔵 Low · up to 03ad3

Mongo attribute registration and diagnostics are expanded, but some accepted field attributes may not take effect in all supported contexts and the unsupported @updatedAt guidance is inaccurately tested. Resolve these correctness and guidance gaps before relying on the new behavior broadly.

Suggested reviewers: sevinf

Sequence Diagram(s)

sequenceDiagram
  participant MongoProvider
  participant PSLInterpreter
  participant AttributeSpecContext
  participant mongoAttributeSpecs
  participant Diagnostics
  MongoProvider->>PSLInterpreter: pass controlMutationDefaults
  PSLInterpreter->>AttributeSpecContext: build context for each model
  AttributeSpecContext->>mongoAttributeSpecs: resolve registered attributes
  mongoAttributeSpecs-->>PSLInterpreter: return interpreted specifications
  PSLInterpreter->>Diagnostics: report unsupported attributes

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❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
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✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main changes: registering the Mongo attribute namespace and diagnosing unknown attributes.
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Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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size-limit report 📦

Path	Size
postgres / no-emit	180.11 KB (0%)
postgres / emit	151.77 KB (0%)
mongo / no-emit	106.35 KB (+5.21% 🔺)
mongo / emit	90.95 KB (0%)
cf-worker / no-emit	204.52 KB (0%)
cf-worker / emit	172.88 KB (0%)

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Inline comments:
In `@packages/2-mongo-family/2-authoring/contract-psl/src/interpreter.ts`:
- Around line 135-145: Update the attribute validation loop over input.models
and input.compositeTypes so registered attributes whose semantics are
unsupported in context produce diagnostics: reject `@id` and `@unique` on
composite-type fields, reject `@relation` there as applicable, and reject `@unique`
on relation fields before index collection. Preserve valid model-field attribute
handling and use the existing diagnostic mechanism.

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• examples/retail-store/migrations/app/20260513T0508_backfill_product_status/contract.prisma
• examples/retail-store/migrations/app/20260628T0931_add_product_status_order_type_enums/contract.prisma
• examples/retail-store/src/contract.prisma
• packages/2-mongo-family/2-authoring/contract-psl/README.md
• packages/2-mongo-family/2-authoring/contract-psl/src/exports/index.ts
• packages/2-mongo-family/2-authoring/contract-psl/src/interpreter.ts
• packages/2-mongo-family/2-authoring/contract-psl/src/mongo-attribute-specs.ts
• packages/2-mongo-family/2-authoring/contract-psl/src/provider.ts
• packages/2-mongo-family/2-authoring/contract-psl/test/interpreter.attribute-specs.test.ts
• packages/2-mongo-family/2-authoring/contract-psl/test/interpreter.polymorphism.test.ts
• packages/2-mongo-family/2-authoring/contract-psl/test/interpreter.test.ts
• packages/2-mongo-family/2-authoring/contract-psl/test/mongo-attribute-specs.test.ts
• packages/2-mongo-family/9-family/package.json
• packages/2-mongo-family/9-family/src/core/control-descriptor.ts
• packages/2-mongo-family/9-family/src/exports/pack.ts
• packages/2-mongo-family/9-family/test/attribute-specs.test.ts
• packages/2-mongo-family/9-family/test/control.test.ts
• packages/3-extensions/mongo/test/scalar-type-parity.test.ts
• packages/3-mongo-target/1-mongo-target/test/mongo-runner.polymorphism.integration.test.ts
• test/integration/test/authoring/attribute-specs.lsp-consumability.test.ts
• test/integration/test/authoring/attribute-specs/_fixture-mongo/prisma.config.ts
• test/integration/test/mongo/interpreter.enum.test.ts
• test/integration/test/mongo/migration-psl-authoring.test.ts
• test/integration/test/ports/prisma/functional/legacy-aggregate-raw/_fixture/contract.prisma
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Inline comments:
In
`@packages/2-mongo-family/2-authoring/contract-psl/test/interpreter.attribute-specs.test.ts`:
- Around line 131-134: Update the PSL_UNSUPPORTED_FIELD_ATTRIBUTE diagnostic
message for `@updatedAt` in the interpreter and its assertion to describe
automatic timestamp updates rather than Mongo default-value lowering, while
preserving the existing unsupported-attribute context.

In
`@skills/prisma-8/upgrading/app/upgrades/8.0.0-rc.8-to-8.0.0-rc.9/instructions.md`:
- Around line 19-25: Update the mongo-unlowered-attributes-are-rejected upgrade
rule to use target-aware selection so it applies only to MongoDB projects, while
preserving its existing Prisma-file attribute detection and guidance.

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