chore: initialize qiming workspace repository
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qimingcode/packages/opencode/specs/effect/schema.md
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qimingcode/packages/opencode/specs/effect/schema.md
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# Schema migration
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Practical reference for migrating data types in `packages/opencode` from
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Zod-first definitions to Effect Schema with Zod compatibility shims.
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## Goal
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Use Effect Schema as the source of truth for domain models, IDs, inputs,
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outputs, and typed errors. Keep Zod available at existing HTTP, tool, and
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compatibility boundaries by exposing a `.zod` static derived from the Effect
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schema via `@/util/effect-zod`.
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The long-term driver is `specs/effect/http-api.md` — once the HTTP server
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moves to `@effect/platform`, every Schema-first DTO can flow through
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`HttpApi` / `HttpRouter` without a zod translation layer, and the entire
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`effect-zod` walker plus every `.zod` static can be deleted.
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## Preferred shapes
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### Data objects
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Use `Schema.Class` for structured data.
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```ts
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export class Info extends Schema.Class<Info>("Foo.Info")({
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id: FooID,
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name: Schema.String,
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enabled: Schema.Boolean,
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}) {
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static readonly zod = zod(Info)
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}
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```
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If the class cannot reference itself cleanly during initialization, use the
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two-step `withStatics` pattern:
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```ts
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export const Info = Schema.Struct({
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id: FooID,
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name: Schema.String,
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}).pipe(withStatics((s) => ({ zod: zod(s) })))
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```
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### Errors
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Use `Schema.TaggedErrorClass` for domain errors.
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```ts
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export class NotFoundError extends Schema.TaggedErrorClass<NotFoundError>()("FooNotFoundError", {
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id: FooID,
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}) {}
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```
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### IDs and branded leaf types
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Keep branded/schema-backed IDs as Effect schemas and expose
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`static readonly zod` for compatibility when callers still expect Zod.
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### Refinements
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Reuse named refinements instead of re-spelling `z.number().int().positive()`
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in every schema. The `effect-zod` walker translates the Effect versions into
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the corresponding zod methods, so JSON Schema output (`type: integer`,
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`exclusiveMinimum`, `pattern`, `format: uuid`, …) is preserved.
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```ts
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const PositiveInt = Schema.Number.check(Schema.isInt()).check(Schema.isGreaterThan(0))
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const NonNegativeInt = Schema.Number.check(Schema.isInt()).check(Schema.isGreaterThanOrEqualTo(0))
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const HexColor = Schema.String.check(Schema.isPattern(/^#[0-9a-fA-F]{6}$/))
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```
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See `test/util/effect-zod.test.ts` for the full set of translated checks.
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## Compatibility rule
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During migration, route validators, tool parameters, and any existing
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Zod-based boundary should consume the derived `.zod` schema instead of
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maintaining a second hand-written Zod schema.
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The default should be:
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- Effect Schema owns the type
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- `.zod` exists only as a compatibility surface
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- new domain models should not start Zod-first unless there is a concrete
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boundary-specific need
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## When Zod can stay
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It is fine to keep a Zod-native schema temporarily when:
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- the type is only used at an HTTP or tool boundary and is not reused elsewhere
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- the validator depends on Zod-only transforms or behavior not yet covered by `zod()`
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- the migration would force unrelated churn across a large call graph
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When this happens, prefer leaving a short note or TODO rather than silently
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creating a parallel schema source of truth.
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## Escape hatches
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The walker in `@/util/effect-zod` exposes two explicit escape hatches for
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cases the pure-Schema path cannot express. Each one stays in the codebase
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only as long as its upstream or local dependency requires it — inline
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comments document when each can be deleted.
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### `ZodOverride` annotation
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Replaces the entire derivation with a hand-crafted zod schema. Used when:
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- the target carries external `$ref` metadata (e.g.
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`config/model-id.ts` points at `https://models.dev/...`)
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- the target is a zod-only schema that cannot yet be expressed as Schema
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(e.g. `ConfigAgent.Info`, `Log.Level`)
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### Local `DeepMutable<T>` in `config/config.ts`
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`Schema.Struct` produces `readonly` types. Some consumer code (notably the
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`Config` service) mutates `Info` objects directly, so a readonly-stripping
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utility is needed when casting the derived zod schema's output type.
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`Types.DeepMutable` from effect-smol would be a drop-in, but it widens
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`unknown` to `{}` in the fallback branch — a bug that affects any schema
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using `Schema.Record(String, Schema.Unknown)`.
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Tracked upstream as `effect:core/x228my`: "Types.DeepMutable widens unknown
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to `{}`." Once that lands, the local `DeepMutable` copy can be deleted and
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`Types.DeepMutable` used directly.
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## Ordering
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Migrate in this order:
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1. Shared leaf models and `schema.ts` files
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2. Exported `Info`, `Input`, `Output`, and DTO types
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3. Tagged domain errors
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4. Service-local internal models
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5. Route and tool boundary validators that can switch to `.zod`
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This keeps shared types canonical first and makes boundary updates mostly
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mechanical.
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## Progress tracker
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### `src/config/` ✅ complete
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All of `packages/opencode/src/config/` has been migrated. Files that still
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import `z` do so only for local `ZodOverride` bridges or for `z.ZodType`
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type annotations — the `export const <Info|Spec>` values are all Effect
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Schema at source.
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A file is considered "done" when:
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- its exported schema values (`Info`, `Input`, `Event`, `Definition`, etc.)
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are authored as Effect Schema
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- any remaining zod is either a derived compat bridge (via `zod()` /
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`zodObject()`), a `z.ZodType` type annotation, or a documented
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`ZodOverride` escape hatch — never a hand-written parallel source of truth
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Files that meet this bar but still carry a compat bridge are checked off
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with an inline note describing the bridge and what unblocks its removal.
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- [x] skills, formatter, console-state, mcp, lsp, permission (leaves), model-id, command, plugin, provider
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- [x] server, layout
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- [x] keybinds
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- [x] permission#Info
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- [x] agent
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- [x] config.ts root
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### `src/*/schema.ts` leaf modules
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These are the highest-priority next targets. Each is a small, self-contained
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schema module with a clear domain.
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- [x] `src/account/schema.ts`
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- [x] `src/control-plane/schema.ts`
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- [x] `src/permission/schema.ts`
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- [x] `src/project/schema.ts`
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- [x] `src/provider/schema.ts`
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- [x] `src/pty/schema.ts`
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- [x] `src/question/schema.ts`
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- [x] `src/session/schema.ts`
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- [x] `src/storage/schema.ts`
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- [x] `src/sync/schema.ts`
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- [x] `src/tool/schema.ts`
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- [x] `src/util/schema.ts`
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### Session domain
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Major cluster. Message + event types flow through the SSE API and every SDK
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output, so byte-identical SDK surface is critical.
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Suggested order for this cluster, starting from the leaves that `session.ts`
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and the SSE/event surface depend on:
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1. `src/session/schema.ts` ✅ already migrated
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2. `src/provider/schema.ts` if `message-v2.ts` still relies on zod-first IDs
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3. `src/lsp/*` schema leaves needed by `LSP.Range`
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4. `src/snapshot/*` leaves used by `Snapshot.FileDiff`
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5. `src/session/message-v2.ts`
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6. `src/session/message.ts`
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7. `src/session/prompt.ts`
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8. `src/session/revert.ts`
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9. `src/session/summary.ts`
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10. `src/session/status.ts`
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11. `src/session/todo.ts`
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12. `src/session/session.ts`
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13. `src/session/compaction.ts`
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Dependency sketch:
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```text
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session.ts
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|- project/schema.ts
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|- control-plane/schema.ts
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|- permission/schema.ts
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|- snapshot/*
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|- message-v2.ts
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| |- provider/schema.ts
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| |- lsp/*
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| |- snapshot/*
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| |- sync/index.ts
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| `- bus/bus-event.ts
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|- sync/index.ts
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|- bus/bus-event.ts
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`- util/update-schema.ts
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```
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Working rule for this cluster:
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- migrate reusable leaf schemas and nested payload objects first
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- migrate aggregate DTOs like `Session.Info` after their nested pieces exist as
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named Schema values
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- leave zod-only event/update helpers in place temporarily when converting
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them would force unrelated churn across sync/bus boundaries
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`message-v2.ts` first-pass outline:
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1. Schema-backed imports already available
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- `SessionID`, `MessageID`, `PartID`
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- `ProviderID`, `ModelID`
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2. Local leaf objects to extract and migrate first
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- output format payloads
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- common part bases like `PartBase`
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- timestamp/range helper objects like `time.start/end`
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- file/source helper objects
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- token/cost/model helper objects
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3. Part variants built from those leaves
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- `SnapshotPart`, `PatchPart`, `TextPart`, `ReasoningPart`
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- `FilePart`, `AgentPart`, `CompactionPart`, `SubtaskPart`
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- retry/step/tool related parts
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4. Higher-level unions and DTOs
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- `FilePartSource`
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- part unions
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- message unions and assistant/user payloads
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5. Errors and event payloads last
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- `NamedError.create(...)` shapes can stay temporarily if converting them to
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`Schema.TaggedErrorClass` would force unrelated churn
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- `SyncEvent.define(...)` and `BusEvent.define(...)` payloads can use
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derived `.zod` at remaining zod-based HTTP/OpenAPI boundaries
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Possible later tightening after the Schema-first migration is stable:
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- promote repeated opaque strings and timestamp numbers into branded/newtype
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leaf schemas where that adds domain value without changing the wire format
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- [x] `src/session/compaction.ts`
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- [x] `src/session/message-v2.ts`
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- [x] `src/session/message.ts`
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- [x] `src/session/prompt.ts`
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- [x] `src/session/revert.ts`
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- [x] `src/session/session.ts`
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- [x] `src/session/status.ts`
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- [x] `src/session/summary.ts`
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- [x] `src/session/todo.ts`
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### Provider domain
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- [x] `src/provider/auth.ts`
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- [x] `src/provider/models.ts`
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- [x] `src/provider/provider.ts`
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### Tool schemas
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Each tool declares its parameters via a zod schema. Tools are consumed by
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both the in-process runtime and the AI SDK's tool-calling layer, so the
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emitted JSON Schema must stay byte-identical.
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- [x] `src/tool/apply_patch.ts`
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- [x] `src/tool/bash.ts`
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- [x] `src/tool/codesearch.ts`
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- [x] `src/tool/edit.ts`
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- [x] `src/tool/glob.ts`
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- [x] `src/tool/grep.ts`
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- [x] `src/tool/invalid.ts`
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- [x] `src/tool/lsp.ts`
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- [x] `src/tool/plan.ts`
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- [x] `src/tool/question.ts`
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- [x] `src/tool/read.ts`
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- [x] `src/tool/registry.ts`
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- [x] `src/tool/skill.ts`
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- [x] `src/tool/task.ts`
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- [x] `src/tool/todo.ts`
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- [x] `src/tool/tool.ts`
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- [x] `src/tool/webfetch.ts`
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- [x] `src/tool/websearch.ts`
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- [x] `src/tool/write.ts`
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### HTTP route boundaries
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Every file in `src/server/routes/` uses hono-openapi with zod validators for
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route inputs/outputs. Migrating these individually is the last step; most
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will switch to `.zod` derived from the Schema-migrated domain types above,
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which means touching them is largely mechanical once the domain side is
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done.
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- [ ] `src/server/error.ts`
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- [x] `src/server/event.ts`
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- [x] `src/server/projectors.ts`
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- [ ] `src/server/routes/control/index.ts`
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- [ ] `src/server/routes/control/workspace.ts`
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- [ ] `src/server/routes/global.ts`
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- [ ] `src/server/routes/instance/index.ts`
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- [ ] `src/server/routes/instance/config.ts`
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- [ ] `src/server/routes/instance/event.ts`
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- [ ] `src/server/routes/instance/experimental.ts`
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- [ ] `src/server/routes/instance/file.ts`
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- [ ] `src/server/routes/instance/mcp.ts`
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- [ ] `src/server/routes/instance/permission.ts`
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- [ ] `src/server/routes/instance/project.ts`
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- [ ] `src/server/routes/instance/provider.ts`
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- [ ] `src/server/routes/instance/pty.ts`
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- [ ] `src/server/routes/instance/question.ts`
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- [ ] `src/server/routes/instance/session.ts`
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- [ ] `src/server/routes/instance/sync.ts`
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- [ ] `src/server/routes/instance/tui.ts`
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The bigger prize for this group is the `@effect/platform` HTTP migration
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described in `specs/effect/http-api.md`. Once that lands, every one of
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these files changes shape entirely (`HttpApi.endpoint(...)` and friends),
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so the Schema-first domain types become a prerequisite rather than a
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sibling task.
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### Everything else
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Small / shared / control-plane / CLI. Mostly independent; can be done
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piecewise.
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- [ ] `src/acp/agent.ts`
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- [ ] `src/agent/agent.ts`
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- [x] `src/bus/bus-event.ts`
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- [ ] `src/bus/index.ts`
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- [ ] `src/cli/cmd/tui/config/tui-migrate.ts`
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- [ ] `src/cli/cmd/tui/config/tui-schema.ts`
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- [ ] `src/cli/cmd/tui/config/tui.ts`
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- [ ] `src/cli/cmd/tui/event.ts`
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- [ ] `src/cli/ui.ts`
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- [ ] `src/command/index.ts`
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- [x] `src/control-plane/adaptors/worktree.ts`
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- [x] `src/control-plane/types.ts`
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- [x] `src/control-plane/workspace.ts`
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- [ ] `src/file/index.ts`
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- [ ] `src/file/ripgrep.ts`
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- [ ] `src/file/watcher.ts`
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- [ ] `src/format/index.ts`
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- [ ] `src/id/id.ts`
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- [ ] `src/ide/index.ts`
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- [ ] `src/installation/index.ts`
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- [ ] `src/lsp/client.ts`
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- [ ] `src/lsp/lsp.ts`
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- [ ] `src/mcp/auth.ts`
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- [ ] `src/patch/index.ts`
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- [ ] `src/plugin/github-copilot/models.ts`
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- [ ] `src/project/project.ts`
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- [ ] `src/project/vcs.ts`
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- [ ] `src/pty/index.ts`
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- [ ] `src/skill/index.ts`
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- [ ] `src/snapshot/index.ts`
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- [ ] `src/storage/db.ts`
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- [ ] `src/storage/storage.ts`
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- [x] `src/sync/index.ts` — public API (`SyncEvent.define`) is Schema-first; `payloads()` still derives zod for the remaining HTTP/OpenAPI boundary
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- [ ] `src/util/fn.ts`
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- [ ] `src/util/log.ts`
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- [ ] `src/util/update-schema.ts`
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- [ ] `src/worktree/index.ts`
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### Do-not-migrate
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- `src/util/effect-zod.ts` — the walker itself. Stays zod-importing forever
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(it's what emits zod from Schema). Goes away only when the `.zod`
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compatibility layer is no longer needed anywhere.
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## Notes
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- Use `@/util/effect-zod` for all Schema → Zod conversion.
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- Prefer one canonical schema definition. Avoid maintaining parallel Zod and
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Effect definitions for the same domain type.
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- Keep the migration incremental. Converting the domain model first is more
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valuable than converting every boundary in the same change.
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- Every migrated file should leave the generated SDK output (`packages/sdk/
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openapi.json` and `packages/sdk/js/src/v2/gen/types.gen.ts`) byte-identical
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unless the change is deliberately user-visible.
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