fix(engine): a config section keeps the objects its config file built, through arktype's clone option - #280
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arktype rebuilds an object whenever a morph or a default applies anywhere inside it, and the rebuild deep-clones every property, including values the schema only checks by predicate. A control descriptor the config file built is such a value: its create closes over module state, its codec tables and contract serializer are class instances relying on this. The clone arktype handed back was structurally equal and behaviourally broken: prisma db init failed reading the contract marker with "unexpected typeParams for non-parameterized codec" because a cloned codec descriptor no longer dispatched through its prototype. Validation now copies the input only along the structure the schema declares, so arktype can assign defaults onto parents the config file froze, and after validation puts the input's own value back at every path the schema leaves opaque. A transformed value (a pipe, a resolved path) keeps its output. A morph node's declared structure lives on its in side, which the walk now follows. Engine 0.6.0 is on the registry, so this ships as 0.6.1; the recorded engine-pin exceptions move with it. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io>
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WalkthroughConfiguration schema validation now uses a clone function that copies plain objects and arrays while preserving non-plain values by reference. The clone handles cycles and symbol-keyed properties. New tests cover schema transformations, defaults, paths, frozen inputs, and several schema forms. CLI Engine package references and conformance exceptions were updated to version 0.6.1, and an ADR documents the cloning behavior. Priority: ➖ Normal Merge Risk: ⚪ Minimal · up to The change preserves opaque configuration values during schema transformations and aligns the engine release references. No user-impacting regression is established in the supplied diff, so the PR is mergeable after normal checks. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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In `@packages/cli-engine/src/config-schema.ts`:
- Around line 106-120: Update copyAlongSchema and restoreOpaque to resolve and
preserve the applicable ArkType schema branch instead of always using the first
structural union branch, including branches reached through morph nodes and
transformed defaults. Extend StructureLike handling to inspect index constraints
and distinguish tuple positions from sequence elements, applying the resolved
node for each array entry so frozen declared paths and transformed outputs
remain correct.
- Around line 160-164: Update restoreOpaque’s structured-object reconstruction
to use Reflect.ownKeys and preserve symbol-keyed properties created by morphs,
while retaining descriptor-aware copying for each key. Keep existing handling
for validated values and avoid changing the pre-existing treatment of
non-enumerable input properties.
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…the value Review follow-ups: a union is walked through the branch that accepts the value (arktype's allows), so a value matching a later structural branch is copied for defaults and restored correctly; a tuple is walked by position through sequence.prefix, a list through sequence.element; own symbol keys a morph adds survive the restore (Reflect.ownKeys); and an index signature on declared structure is refused with a diagnostic naming the alternative, rather than silently walked. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io>
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Both threads addressed in fad8359 and confirmed resolved by the reviewer.
… words The names were invented vocabulary: StructureLike, NodeLike, and "opaque" for a value the schema checks without describing what is inside it. They are now SchemaShape, SchemaNode, copyWhereDescribed and putBackOriginalValues, and the comments say the thing rather than a coined label for it. Four defects found while renaming: - An index signature in a schema is its author's bug, but the throw was caught with everything else and reported as a broken config file, telling the user to edit a file that is fine. It is now a ConfigSchemaError the catch re-throws. - The error branch after the restore walk was unreachable: the walk returns values, never ArkErrors. Removed. - Optional and postfix tuple positions resolved to the variadic element node, so a trailing declared position was walked against the wrong node. Positions now count from both ends. - A union no alternative matched left a frozen value uncopied, so applying a default threw a read-only write that surfaced as an unreadable section instead of a field error. Such a value is now copied one level. The restore walk also resolved the applicable node twice per value. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io>
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Inline comments:
In `@packages/cli-engine/src/config-schema.ts`:
- Around line 163-164: Update nodeForValue and the putBackOriginalValues restore
flow so a structured morph preserves its produced output instead of restoring
descendant values from the original input. Carry the morph boundary through the
node lookup, including when nodeForValue returns an inner node, and ensure
validateSectionWithSchema retains replacement values such as source from the
morph result.
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The restore walk looked through a transforming node to the shape it
accepts, so it descended into what a pipe produced and put the input back
inside it. A schema like configSchema({ source: checkedOnly }).pipe(() =>
({ source: other })) lost the pipe's source.
Whether a value was rebuilt by arktype or replaced by a pipe is not
visible on the compiled node: an object literal with defaults plus a
narrow compiles exactly like an object literal with a pipe. So the walk
now asks the values instead. A rebuild carries the same own keys as the
input, and only then is the input put back; a replacement is a different
object and is kept.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Signed-off-by: willbot <w.a.madden+machine@gmail.com>
Signed-off-by: Will Madden <madden@prisma.io>
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The structured-morph thread is fixed in c37f9c3 and confirmed resolved by the reviewer; the remaining same-key parent-pipe case is named in the code comment and the thread.
…gh arktype's clone option Resolving a path or applying a default transforms the value, and arktype clones what it is given before it transforms it, so a config file's own objects are never written to. Its built-in clone rebuilds every object it reaches. A section's control descriptors cannot survive that: a codec table, a contract serializer, a create() that needs its own `this` all come back as lookalikes, and the family's commands fail on them. The previous commits worked around the built-in clone by copying the input along the shape the schema describes and putting the config file's objects back afterwards, walking arktype's compiled node tree twice. arktype has a documented option for exactly this: a scope can supply its own clone. The config scope now supplies one that rebuilds plain objects and arrays and nothing else, so a class instance, a Map or a function reaches the command exactly as the file constructed it, while arktype still has somewhere to write a resolved path or an applied default. The two walks, the node-shape types, and ConfigSchemaError are gone, and index signatures now work instead of being refused. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io>
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…w arktype treats a config file's objects The engine's config schemas once carried a copy-and-restore walk over arktype's compiled node tree, replaced by arktype's documented clone option. A package AGENTS.md now tells the next agent to read the arktype docs before writing code that walks schemas or repairs arktype's output, never to read the compiled node tree, and records what the config schemas rely on: any morph clones the whole input, the default clone rebuilds plain objects and class instances, the scope's clone keeps what the config file constructed, relative path defaults must be thunks, ctx.path in a morph, and that a path given inside a narrow is taken from the root. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io>
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…ngine resolves its paths (prisma#30372) ## At a glance The `orm` section of `prisma.config.ts` is declared once, with the fields that are paths marked as such: ```ts // packages/1-framework/3-tooling/config-loader/src/orm-section.ts export const ormConfigSchema = configSchema({ family: { kind: "'family'", ...descriptorFields, emission: 'object' }, target: { kind: "'target'", ...targetLikeFields }, adapter: { kind: "'adapter'", ...targetLikeFields }, 'driver?': { kind: "'driver'", ...targetLikeFields }, 'extensions?': [{ kind: "'extension'", ...targetLikeFields }, '[]'], 'db?': { 'connection?': 'unknown' }, 'contract?': { source: { load: 'Function', 'inputs?': 'path[]', 'format?': 'string' }, output: ['path', '=', () => 'src/prisma/contract.json'], }, migrations: [{ dir: ['path', '=', () => './migrations'] }, '=', () => ({})], 'formatter?': { 'indent?': "number.integer >= 1 | 'tab'", 'newline?': "'LF' | 'CRLF'" }, }).narrow(/* familyId and targetId agreement across descriptors */); ``` Given this project and this invocation: ``` exp/ sub/ prisma.config.ts # orm: ormConfig({ contract: './contract.prisma', migrations: { dir: './migrations' } }) contract.prisma ``` | Run from | Command | Before | After | | --------- | ------------------------------------------------------ | -------------------------------------------------------------- | ------------------------------ | | `exp/sub` | `prisma contract emit --config ./prisma.config.ts` | writes `exp/sub/contract.json` | same | | `exp` | `prisma contract emit --config ./sub/prisma.config.ts` | `CONTRACT.SOURCE_LOAD_FAILED`: looks for `exp/contract.prisma` | writes `exp/sub/contract.json` | Config files are unchanged. ## The decision A relative path in `prisma.config.ts` is relative to the file that wrote it. Only the ORM knows which of its fields are paths; only the CLI engine knows which file wrote each value, because its chain merge records that per key. The schema declaration puts the first where the second can use it. The engine derives validation, a `CLI.CONFIG_FIELD_INVALID` diagnostic per bad field naming the file to fix, and the resolution of every `path` field, from the one declaration; the ORM writes no validation, resolution, or path-anchoring code. This is [prisma/prisma-cli ADR 0005](https://github.com/prisma/prisma-cli/blob/main/docs/architecture/adrs/0005-config-sections-declare-their-shape.md), shipped in engine 0.6.0 by prisma/prisma-cli#279; every product that mounts commands declares its section this way. ## Why it broke The ORM's own `prisma` bin resolved config paths in its loader against the config file. The unified `prisma` CLI loads the config through the engine's loader, which handed the `orm` section over as written; the ORM's command wrapper then resolved paths itself, and the only directory it could see was the working directory. The same defect existed a second time in `projectConfigPathFor`, which rebuilt `<cwd>/prisma.config.ts` to find the project's `package.json` and, from a parent directory, read the wrong manifest. ## What changes - **`@internal/config-loader`** declares `ormConfigSchema` and `ormConfigSection` (`defineConfigSection({ name: 'orm', schema })`). It is the lowest package that can depend on the engine; `@internal/cli` and `@internal/cli-telemetry` consume the section from it. Path defaults are thunks, which arktype evaluates when the default is applied, so they resolve against the config file like authored values. - **Descriptors are declared references.** A control descriptor is a runtime object the config file constructs: `create` closes over module state, and its codec tables, contract serializer and migration hooks rely on their prototypes and on `this`. The schema declares each descriptor, and `db.connection`, with the engine's `reference(schema)` (prisma/prisma-cli#284), so the command receives the object the config file built. The schema checks only a descriptor's identifying fields: `kind`, `id`, `familyId`, `version`, `create`, and `targetId` or `emission`. Every value not declared a reference is copied before paths are resolved and defaults applied. Cross-descriptor rules (`familyId` and `targetId` agreement, the removed `extensionPacks` key) are one function, which the schema's `narrow` and the loader both call. - **A codec without params has no `paramsSchema`.** A codec that took no params used to declare `paramsSchema = voidParamsSchema`, a shared schema accepting only `undefined`, and `isParameterized` asked whether a descriptor's schema was that exact object. A copied descriptor carries a copy of that schema, so every codec on it reported itself parameterized, which is how `db init` failed with `Invalid typeParams for codec 'pg/text@1'`. `paramsSchema` is now `StandardSchemaV1<P> | undefined`, a codec without params sets it to `undefined`, and `isParameterized` is `paramsSchema !== undefined`, which no copy can change. Type-param validation still rejects `typeParams` for such a codec with `RUNTIME.TYPE_PARAMS_INVALID`. `voidParamsSchema` is removed; [`upgrade-instructions/pending/codec-without-params-schema/extension/`](https://github.com/prisma/orm/blob/feat/orm-config-schema/upgrade-instructions/pending/codec-without-params-schema/extension/instructions.md) tells extension authors how to follow. - **The ORM's bin** hands the engine each evaluated file with its sections as written (`loadConfigFiles`); the engine validates the merged section with that provenance before a command runs. `loadConfig` runs the same schema for the language server and the vite plugin, wrapping each field diagnostic as `CONFIG.VALIDATION_FAILED` with the subsection it concerns, so `requireConfigSections` keeps working. - **Commands** read absolute paths and `baseDir`. The command wrapper's cwd finalisation, `finalize-config.ts`, `collectConfigIssues` and its hand-written descriptor checks, and `projectConfigPathFor` are deleted. The migration path helpers take only the config. Control API operations that located the project through `configPath` take `projectDir`; `resolveMigrationPaths` takes the config. - **`@prisma/cli-engine` moves to 0.6.1** (0.6.0 plus prisma/prisma-cli#280 and #284: a schema declares the values it keeps as references) in `@internal/cli`, `@internal/config-loader`, `@prisma/orm-toolchain`'s peer, the four extension packages, and the integration test package. The `defineConfig` → `definePrismaConfig` rename the bump requires landed separately in prisma#30129. Examples and fixture apps consume published packages and keep their pins. - **Diagnostics under the unified CLI change code.** A malformed `orm` field is now reported by the engine as `CLI.CONFIG_FIELD_INVALID` (one per field, `meta.section: 'orm'`, `meta.field` the dotted path, `where.path` the config file that declared it) under `CLI.CONFIG_SECTION_INVALID`. `CONFIG.VALIDATION_FAILED` remains what the ORM's own loader raises for the language server and the vite plugin. The error reference records the split; the two integration files that asserted the old code are updated. - **Docs**: `config-validation-and-normalization.mdc` now describes the schema as the single home of structural rules, `loadConfigFiles`/`loadConfig` as evaluation plus diagnostics, and path resolution as the schema's job; the CLI Style Guide says relative paths in the config file resolve against the file that wrote them, with `--output-path` the one path relative to cwd; the loader README follows. The arktype rule now says to read the arktype docs before building validation machinery and never to read arktype's compiled node tree, and `docs/reference/arktype-usage.md` records what a transformation does to its input: any pipe or default makes arktype clone the whole input, and the default clone rebuilds plain objects and class instances. The codec authoring guide, the two codec ADRs and the package READMEs declare codecs without params with `paramsSchema = undefined`. ## Tests - `framework-components/test/materialize-codec.test.ts`: a descriptor copied the way arktype's default clone copies it keeps `isParameterized` for codecs with and without params (this test fails before the change), and a codec without params rejects `typeParams`. - `config-loader/test/orm-section.test.ts`: the schema accepts a valid config, supplies the migrations dir and default contract output, records `baseDir`, resolves inputs, output and migrations dir against the config file, leaves absolute paths alone, keeps a descriptor's class instances and functions, and the source's `load`, as the file built them (closures, prototypes and `this` survive), reports missing descriptors and descriptor field problems, family and target mismatches on target, adapter, driver and extensions, the removed `extensionPacks` key, contract, migrations and formatter problems, keeps fields the schema does not name on descriptors and on the contract source, and never throws on hostile input. `load.test.ts` still passes unchanged apart from the finalise module going away. - `@internal/cli`: `contract emit` and `migration plan` reached with `--config sub/prisma.config.ts` from the parent read and write under `sub/`, the plan test exercising the manifest walk from `baseDir`; the bin loader hands the engine the requested file with paths as written; ORM command tests seed the engine with a `prisma.config.ts` in the run directory through one shared helper so the engine validates the seed as it would a real file. Verified locally against a build of prisma/prisma-cli#280 overlaid on the installed engine: | Package | Result | | --- | --- | | `@internal/config` | 5 tests | | `@internal/config-loader` | 53 tests | | `@internal/cli` | 116 files, 1484 tests | | `@internal/cli-telemetry` (incl. the real-Postgres e2e) | 113 tests | | `@internal/vite-plugin-contract-emit` | 31 tests | | extensions (paradedb, pgvector, supabase, postgis) | 390 tests | | integration | 788 files, 4224 tests | | all package suites after the codec change | 83 tasks; the first run's 7 failures (tests that expected every codec to have a schema, and a bundled comment naming an internal package) fixed and rerun green | | repo | build, typecheck, lint, `lint:deps`, `lint:casts`, rules lints, `fixtures:check`, upgrade coverage pass | CI on this PR is red until `@prisma/cli-engine@0.6.1` is published and the pin here moves to it; the earlier red run (270 integration failures) was arktype's default clone rebuilding descriptors, which 0.6.1 fixes. Verified locally with a 0.6.1 build: `config-loader` (53), the CLI package (1484), and the config-related integration files (200) pass. 🤖 Generated with [Claude Code](https://claude.com/claude-code) <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **New Features** * Configuration diagnostics now identify the affected field, section, and config file. * Relative paths in config files—including extended configs—resolve from the file that declares them. Command-line output paths remain relative to the working directory. * Config loading retains details about each file in an extended configuration chain. * **Bug Fixes** * Malformed configuration sections receive more specific diagnostics, while commands can proceed when errors affect sections they do not read. * **Breaking Changes** * Legacy configuration-validation exports and config-path operation options are no longer available. * `voidParamsSchema` is no longer exported. Codecs without parameters should set `paramsSchema` to `undefined`; non-empty type parameters are rejected, while empty parameters are accepted. <!-- end of auto-generated comment: release notes by coderabbit.ai --> --------- Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io> Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>
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A config section now keeps the objects its config file built. The engine does it with arktype's own
cloneoption: before arktype transforms a value it clones it, and the config scope supplies a clone that rebuilds plain objects and arrays and nothing else.What goes wrong today
A
prisma.config.tsbuilds real objects at runtime. A target descriptor holds codec tables, a contract serializer that is a class instance, and acreatefunction closing over module state:Resolving a
pathfield or applying a default is a transformation. Before arktype applies one, it clones the whole input so the caller's objects are never written to. Its built-in clone rebuilds every object it reaches, keeping the prototype but not the instance. With engine 0.6.0 the ORM's commands therefore received lookalikes of the codec tables and the serializer, andprisma db initfailed withInvalid typeParams for codec 'pg/text@1'. prisma/orm#30372 hit this in 270 integration tests.What this does
arktype documents the clone as configurable per scope (see Configuration, "clone"). The config scope passes its own:
copyPlainPartscopies plain objects and arrays, which is where arktype writes a resolved path or an applied default. Everything else is returned as it is: a class instance, aMap, aDate, a function. So after validation:The descriptor object itself is a fresh plain object with the same members, so
thisin its methods still finds the codec tables and the serializer. A frozen section still works, because the copy is not frozen. A value that refers back to itself is copied once.ADR 0005 gains one bullet recording this rule, and a new
packages/cli-engine/AGENTS.mdtells the next agent to read the arktype docs before building validation machinery, and records how arktype treats a config file's objects.What goes away
The earlier commits on this branch fixed the same failure by walking arktype's compiled schema twice: once to copy the input only where the schema describes a shape, and once to put the config file's objects back wherever it did not. That took about 200 lines of code that depended on arktype's internal node layout, and it needed special cases for unions, tuples, pipes and index signatures. All of it is deleted, along with
ConfigSchemaError. An index signature in a schema, which the walks had to refuse, now simply works.Tests
tests/config-schema.test.tschecks that class instances and functions the file built reach the command unchanged inside a frozen section, while sibling paths and defaults resolve. It also checks that a plain object the schema describes is copied rather than written to, that a self-referencing object is copied once, and that an index signature resolves every value. The existing union, tuple, pipe, symbol-key and frozen-default tests still pass.@prisma/cli-engine@prisma/cliVerified against prisma/orm#30372 with this build: the integration tests that carried the failures pass, including
db initand the ref-advancement end-to-end tests.Version
0.6.0 reached the registry with #279, so this ships as 0.6.1 and the recorded engine-pin exceptions move with it.
Alternatives considered
clone: false. arktype would write resolved paths and defaults straight into the config file's objects, and a frozen section throws on the first write.structuredClone. It throws on any function, and it rebuilds class instances as plain objects without their prototype.🤖 Generated with Claude Code