feat: Add WebSocket and real-time collaboration protocol specifications by Copilot · Pull Request #376 · objectstack-ai/framework

Copilot · 2026-01-30T06:29:24Z

Implements comprehensive Zod schemas for WebSocket-based real-time communication and collaborative editing, addressing requirements for event subscriptions, filtering, presence tracking, and conflict-free collaboration.

WebSocket Event Protocol (`api/websocket.zod.ts`)

Event Subscriptions: Wildcard pattern matching (record.*, *.created) via EventPatternSchema, distinct from dot-notation EventNameSchema for actual events.

Advanced Filtering: Recursive EventFilterSchema with explicit ZodType annotation to resolve circular reference. Supports 13 operators (eq, ne, gt, gte, lt, lte, in, nin, contains, startsWith, endsWith, exists, regex) with AND/OR/NOT combinators.

Presence & Collaboration: Enhanced presence tracking (4 states: online/away/busy/offline) with device detection. Cursor positions with line/column tracking. Edit operations (insert/delete/replace) with version tracking for OT.

Protocol Messages: 10 discriminated union message types with WebSocketMessageSchema for type-safe parsing.

// Subscription with wildcard and advanced filtering
const subscription: EventSubscription = {
  subscriptionId: uuid(),
  events: ['record.*', '*.created'],
  objects: ['account', 'contact'],
  filters: {
    and: [
      { conditions: [{ field: 'amount', operator: 'gte', value: 1000 }] },
      { or: [
        { conditions: [{ field: 'status', operator: 'eq', value: 'active' }] },
        { conditions: [{ field: 'priority', operator: 'in', value: ['high', 'urgent'] }] }
      ]}
    ]
  }
};

Real-Time Collaboration Protocol (`system/collaboration.zod.ts`)

Operational Transformation: OTComponentSchema discriminated union (insert/delete/retain) with attribute support for rich text formatting.

CRDT Types:

LWW-Register with vector clocks for causality tracking
G-Counter (grow-only) and PN-Counter (increment/decrement)
OR-Set with unique addition identifiers for conflict-free removal
Text CRDT with Lamport timestamps for operation ordering

Cursor Sharing: CollaborativeCursorSchema with selection ranges (anchor/focus), visual styling (10 color presets + custom), and typing indicators.

Awareness State: AwarenessUserStateSchema tracks user activity (active/idle/viewing/disconnected), current document/view, and session lifecycle events.

Collaboration Sessions: Supports 4 modes (ot/crdt/lock/hybrid) with configurable conflict resolution, snapshot intervals, and idle timeouts.

// Text CRDT operation with causality tracking
const operation: TextCRDTOperation = {
  operationId: uuid(),
  replicaId: 'replica-1',
  position: 42,
  insert: 'new text',
  timestamp: '2024-01-15T10:30:00Z',
  lamportTimestamp: 156,  // For operation ordering
};

Technical Notes

Renamed PresenceStatus → WebSocketPresenceStatus to avoid export collision with realtime.zod.ts
All schemas follow Zod-first pattern with z.infer<> type derivation
JSON schemas auto-generated for 64 types (29 collaboration, 27 websocket, 8 shared)
Test coverage: 62 tests (websocket) + 71 tests (collaboration) = 133 new tests

Original prompt

2.2 Real-Time Protocol / 实时通信协议

In THIS Repo (Spec Definitions) / 在本仓库（规范定义）

WebSocket Event Protocol

Enhance packages/spec/src/api/websocket.zod.ts
Event subscription schema
Event filtering schema
Presence tracking schema
Collaborative editing protocol
Real-Time Collaboration Protocol

Create packages/spec/src/system/collaboration.zod.ts
Operational transformation schema
CRDT (Conflict-free Replicated Data Type) schema
Cursor sharing schema
Awareness state schema

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vercel · 2026-01-30T06:29:29Z

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Project	Deployment	Actions	Updated (UTC)
spec	Ready	Preview, Comment	Jan 30, 2026 6:39am

- Created websocket.zod.ts with comprehensive WebSocket event protocol - Created collaboration.zod.ts with OT, CRDT, cursor sharing, and awareness - Added comprehensive test coverage for both protocols - Updated exports in index files - All tests passing and build successful Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

github-actions · 2026-01-30T07:01:34Z

This PR is very large. Consider breaking it into smaller PRs for easier review.

Copilot

Pull request overview

Adds protocol specifications for WebSocket-based realtime messaging and collaboration, including generated JSON Schema and documentation pages.

Changes:

Introduces packages/spec/src/api/websocket.zod.ts with subscription patterns, filters, presence/cursor/edit message envelopes, and connection config.
Introduces packages/spec/src/system/collaboration.zod.ts with OT/CRDT/cursor/awareness/session schemas.
Adds Vitest coverage, docs reference pages, and generated JSON-schema artifacts; updates barrel exports.

Reviewed changes

Copilot reviewed 67 out of 67 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
packages/spec/src/system/index.ts	Re-exports the new collaboration protocol from the system package entrypoint.
packages/spec/src/system/collaboration.zod.ts	Adds OT/CRDT/cursor/awareness/session Zod schemas for collaboration.
packages/spec/src/system/collaboration.test.ts	Adds Vitest validation tests for collaboration schemas.
packages/spec/src/api/websocket.zod.ts	Adds WebSocket message, subscription/filter, presence/cursor/edit, and config schemas.
packages/spec/src/api/websocket.test.ts	Adds Vitest validation tests for WebSocket schemas.
packages/spec/src/api/index.ts	Re-exports the new websocket protocol from the API package entrypoint.
packages/spec/json-schema/system/VectorClock.json	Generated JSON schema for `VectorClock`.
packages/spec/json-schema/system/UserActivityStatus.json	Generated JSON schema for `UserActivityStatus`.
packages/spec/json-schema/system/TextCRDTState.json	Generated JSON schema for `TextCRDTState`.
packages/spec/json-schema/system/TextCRDTOperation.json	Generated JSON schema for `TextCRDTOperation`.
packages/spec/json-schema/system/PNCounter.json	Generated JSON schema for `PNCounter`.
packages/spec/json-schema/system/OTTransformResult.json	Generated JSON schema for `OTTransformResult`.
packages/spec/json-schema/system/OTOperationType.json	Generated JSON schema for `OTOperationType`.
packages/spec/json-schema/system/OTOperation.json	Generated JSON schema for `OTOperation`.
packages/spec/json-schema/system/OTComponent.json	Generated JSON schema for `OTComponent`.
packages/spec/json-schema/system/ORSetElement.json	Generated JSON schema for `ORSetElement`.
packages/spec/json-schema/system/ORSet.json	Generated JSON schema for `ORSet`.
packages/spec/json-schema/system/LWWRegister.json	Generated JSON schema for `LWWRegister`.
packages/spec/json-schema/system/GCounter.json	Generated JSON schema for `GCounter`.
packages/spec/json-schema/system/CursorUpdate.json	Generated JSON schema for `CursorUpdate`.
packages/spec/json-schema/system/CursorStyle.json	Generated JSON schema for `CursorStyle`.
packages/spec/json-schema/system/CursorSelection.json	Generated JSON schema for `CursorSelection`.
packages/spec/json-schema/system/CursorColorPreset.json	Generated JSON schema for `CursorColorPreset`.
packages/spec/json-schema/system/CounterOperation.json	Generated JSON schema for `CounterOperation`.
packages/spec/json-schema/system/CollaborativeCursor.json	Generated JSON schema for `CollaborativeCursor`.
packages/spec/json-schema/system/CollaborationSessionConfig.json	Generated JSON schema for `CollaborationSessionConfig`.
packages/spec/json-schema/system/CollaborationSession.json	Generated JSON schema for `CollaborationSession`.
packages/spec/json-schema/system/CollaborationMode.json	Generated JSON schema for `CollaborationMode`.
packages/spec/json-schema/system/CRDTType.json	Generated JSON schema for `CRDTType`.
packages/spec/json-schema/system/CRDTState.json	Generated JSON schema for `CRDTState`.
packages/spec/json-schema/system/CRDTMergeResult.json	Generated JSON schema for `CRDTMergeResult`.
packages/spec/json-schema/system/AwarenessUserState.json	Generated JSON schema for `AwarenessUserState`.
packages/spec/json-schema/system/AwarenessUpdate.json	Generated JSON schema for `AwarenessUpdate`.
packages/spec/json-schema/system/AwarenessSession.json	Generated JSON schema for `AwarenessSession`.
packages/spec/json-schema/system/AwarenessEvent.json	Generated JSON schema for `AwarenessEvent`.
packages/spec/json-schema/api/WebSocketPresenceStatus.json	Generated JSON schema for `WebSocketPresenceStatus`.
packages/spec/json-schema/api/WebSocketMessageType.json	Generated JSON schema for `WebSocketMessageType`.
packages/spec/json-schema/api/WebSocketMessage.json	Generated JSON schema for `WebSocketMessage` union.
packages/spec/json-schema/api/WebSocketConfig.json	Generated JSON schema for `WebSocketConfig`.
packages/spec/json-schema/api/UnsubscribeRequest.json	Generated JSON schema for `UnsubscribeRequest`.
packages/spec/json-schema/api/UnsubscribeMessage.json	Generated JSON schema for `UnsubscribeMessage`.
packages/spec/json-schema/api/SubscribeMessage.json	Generated JSON schema for `SubscribeMessage`.
packages/spec/json-schema/api/PresenceUpdate.json	Generated JSON schema for `PresenceUpdate`.
packages/spec/json-schema/api/PresenceState.json	Generated JSON schema for `PresenceState`.
packages/spec/json-schema/api/PresenceMessage.json	Generated JSON schema for `PresenceMessage`.
packages/spec/json-schema/api/PongMessage.json	Generated JSON schema for `PongMessage`.
packages/spec/json-schema/api/PingMessage.json	Generated JSON schema for `PingMessage`.
packages/spec/json-schema/api/FilterOperator.json	Generated JSON schema for `FilterOperator`.
packages/spec/json-schema/api/EventSubscription.json	Generated JSON schema for `EventSubscription`.
packages/spec/json-schema/api/EventPattern.json	Generated JSON schema for `EventPattern`.
packages/spec/json-schema/api/EventMessage.json	Generated JSON schema for `EventMessage`.
packages/spec/json-schema/api/EventFilterCondition.json	Generated JSON schema for `EventFilterCondition`.
packages/spec/json-schema/api/EventFilter.json	Generated JSON schema for `EventFilter`.
packages/spec/json-schema/api/ErrorMessage.json	Generated JSON schema for `ErrorMessage`.
packages/spec/json-schema/api/EditOperationType.json	Generated JSON schema for `EditOperationType`.
packages/spec/json-schema/api/EditOperation.json	Generated JSON schema for `EditOperation`.
packages/spec/json-schema/api/EditMessage.json	Generated JSON schema for `EditMessage`.
packages/spec/json-schema/api/DocumentState.json	Generated JSON schema for `DocumentState`.
packages/spec/json-schema/api/CursorPosition.json	Generated JSON schema for `CursorPosition`.
packages/spec/json-schema/api/CursorMessage.json	Generated JSON schema for `CursorMessage`.
packages/spec/json-schema/api/AckMessage.json	Generated JSON schema for `AckMessage`.
content/docs/references/system/meta.json	Adds the collaboration docs page to system references navigation.
content/docs/references/system/index.mdx	Adds a navigation card for the collaboration protocol docs.
content/docs/references/system/collaboration.mdx	Adds a reference page for collaboration schemas.
content/docs/references/api/websocket.mdx	Adds a reference page for websocket schemas.
content/docs/references/api/meta.json	Adds the websocket docs page to API references navigation.
content/docs/references/api/index.mdx	Adds a navigation card for the websocket protocol docs.

Copilot · 2026-01-30T07:11:22Z

packages/spec/src/api/websocket.zod.ts

+export const EventFilterCondition = z.object({
+  field: z.string().describe('Field path to filter on (supports dot notation, e.g., "user.email")'),
+  operator: FilterOperator.describe('Comparison operator'),
+  value: z.any().optional().describe('Value to compare against (not needed for "exists" operator)'),
+});


EventFilterCondition allows value to be omitted for operators like eq, gt, in, etc. This contradicts the field description and will accept structurally invalid filters. Consider modeling this as a discriminated union on operator (e.g., require value for all operators except exists, and constrain in/nin to arrays, regex to string/RegExp-like inputs).

Copilot · 2026-01-30T07:11:22Z

packages/spec/src/api/websocket.zod.ts

+export const EventSubscriptionSchema = z.object({
+  subscriptionId: z.string().uuid().describe('Unique subscription identifier'),
+  events: z.array(EventPatternSchema).describe('Event patterns to subscribe to (supports wildcards, e.g., "record.*", "user.created")'),
+  objects: z.array(z.string()).optional().describe('Object names to filter events by (e.g., ["account", "contact"])'),
+  filters: EventFilterSchema.optional().describe('Advanced filter conditions for event payloads'),
+  channels: z.array(z.string()).optional().describe('Channel names for scoped subscriptions'),
+});


events in EventSubscriptionSchema is not constrained to be non-empty, so { events: [] } will currently validate. If at least one event pattern is required for a meaningful subscription, add a .min(1) on the array (and align tests accordingly).

Copilot · 2026-01-30T07:11:23Z

packages/spec/src/api/websocket.zod.ts

+export const EditOperationType = z.enum([
+  'insert',      // Insert text at position
+  'delete',      // Delete text from range
+  'replace',     // Replace text in range
+]);
+
+export type EditOperationType = z.infer<typeof EditOperationType>;
+
+/**
+ * Edit Operation Schema
+ * Represents a single edit operation on a document
+ * Supports Operational Transformation (OT) for conflict resolution
+ */
+export const EditOperationSchema = z.object({
+  operationId: z.string().uuid().describe('Unique operation identifier'),
+  documentId: z.string().describe('Document identifier'),
+  userId: z.string().describe('User who performed the edit'),
+  sessionId: z.string().uuid().describe('Session identifier'),
+  type: EditOperationType.describe('Type of edit operation'),
+  position: z.object({
+    line: z.number().int().nonnegative().describe('Line number (0-indexed)'),
+    column: z.number().int().nonnegative().describe('Column number (0-indexed)'),
+  }).describe('Starting position of the operation'),
+  endPosition: z.object({
+    line: z.number().int().nonnegative(),
+    column: z.number().int().nonnegative(),
+  }).optional().describe('Ending position (for delete/replace operations)'),
+  content: z.string().optional().describe('Content to insert/replace'),
+  version: z.number().int().nonnegative().describe('Document version before this operation'),
+  timestamp: z.string().datetime().describe('ISO 8601 datetime when operation was created'),
+  baseOperationId: z.string().uuid().optional().describe('Previous operation ID this builds upon (for OT)'),
+});


EditOperationSchema doesn’t enforce the shape implied by type: insert can omit content, and delete/replace can omit endPosition (and replace can omit content). Consider switching this to a discriminated union on type with per-operation required/forbidden fields to prevent invalid edit operations from validating.

Copilot · 2026-01-30T07:11:23Z

packages/spec/src/system/collaboration.zod.ts

+export const TextCRDTOperationSchema = z.object({
+  operationId: z.string().uuid().describe('Unique operation identifier'),
+  replicaId: z.string().describe('Replica identifier'),
+  position: z.number().int().nonnegative().describe('Position in document'),
+  insert: z.string().optional().describe('Text to insert'),
+  delete: z.number().int().positive().optional().describe('Number of characters to delete'),
+  timestamp: z.string().datetime().describe('ISO 8601 datetime of operation'),
+  lamportTimestamp: z.number().int().nonnegative().describe('Lamport timestamp for ordering'),
+});


TextCRDTOperationSchema allows both insert and delete to be omitted (and also allows both to be present), which means no-op or ambiguous operations validate. Consider enforcing exactly one of insert or delete (e.g., discriminated union or a .refine XOR constraint).

Copilot · 2026-01-30T07:11:23Z

packages/spec/src/system/collaboration.zod.ts

+export const CRDTType = z.enum([
+  'lww-register',    // Last-Write-Wins Register
+  'g-counter',       // Grow-only Counter
+  'pn-counter',      // Positive-Negative Counter
+  'g-set',           // Grow-only Set
+  'or-set',          // Observed-Remove Set
+  'lww-map',         // Last-Write-Wins Map
+  'text',            // CRDT-based Text (e.g., Yjs, Automerge)
+  'tree',            // CRDT-based Tree structure
+  'json',            // CRDT-based JSON (e.g., Automerge)
+]);
+


CRDTType lists values (g-set, lww-map, tree, json) that have no corresponding state schemas and are not included in CRDTStateSchema. This makes the protocol surface area ambiguous. Either add schemas for these CRDT variants (and include them in CRDTStateSchema) or remove them from CRDTType until supported.

Copilot · 2026-01-30T07:11:23Z

content/docs/references/system/collaboration.mdx

+## TypeScript Usage
+
+```typescript
+import { AwarenessEventSchema, AwarenessSessionSchema, AwarenessUpdateSchema, AwarenessUserStateSchema, CRDTMergeResultSchema, CRDTStateSchema, CRDTTypeSchema, CollaborationModeSchema, CollaborationSessionSchema, CollaborationSessionConfigSchema, CollaborativeCursorSchema, CounterOperationSchema, CursorColorPresetSchema, CursorSelectionSchema, CursorStyleSchema, CursorUpdateSchema, GCounterSchema, LWWRegisterSchema, ORSetSchema, ORSetElementSchema, OTComponentSchema, OTOperationSchema, OTOperationTypeSchema, OTTransformResultSchema, PNCounterSchema, TextCRDTOperationSchema, TextCRDTStateSchema, UserActivityStatusSchema, VectorClockSchema } from '@objectstack/spec/system';


The TypeScript import example references schema exports like CRDTTypeSchema, CursorColorPresetSchema, and OTOperationTypeSchema, but in packages/spec/src/system/collaboration.zod.ts the corresponding exports are named CRDTType, CursorColorPreset, and OTOperationType (no Schema suffix). Update the example to match the actual exported names to avoid misleading consumers.

Suggested change

import { AwarenessEventSchema, AwarenessSessionSchema, AwarenessUpdateSchema, AwarenessUserStateSchema, CRDTMergeResultSchema, CRDTStateSchema, CRDTTypeSchema, CollaborationModeSchema, CollaborationSessionSchema, CollaborationSessionConfigSchema, CollaborativeCursorSchema, CounterOperationSchema, CursorColorPresetSchema, CursorSelectionSchema, CursorStyleSchema, CursorUpdateSchema, GCounterSchema, LWWRegisterSchema, ORSetSchema, ORSetElementSchema, OTComponentSchema, OTOperationSchema, OTOperationTypeSchema, OTTransformResultSchema, PNCounterSchema, TextCRDTOperationSchema, TextCRDTStateSchema, UserActivityStatusSchema, VectorClockSchema } from '@objectstack/spec/system';

import { AwarenessEventSchema, AwarenessSessionSchema, AwarenessUpdateSchema, AwarenessUserStateSchema, CRDTMergeResultSchema, CRDTStateSchema, CRDTType, CollaborationModeSchema, CollaborationSessionSchema, CollaborationSessionConfigSchema, CollaborativeCursorSchema, CounterOperationSchema, CursorColorPreset, CursorSelectionSchema, CursorStyleSchema, CursorUpdateSchema, GCounterSchema, LWWRegisterSchema, ORSetSchema, ORSetElementSchema, OTComponentSchema, OTOperationSchema, OTOperationType, OTTransformResultSchema, PNCounterSchema, TextCRDTOperationSchema, TextCRDTStateSchema, UserActivityStatusSchema, VectorClockSchema } from '@objectstack/spec/system';

Copilot · 2026-01-30T07:11:24Z

content/docs/references/api/websocket.mdx

+## TypeScript Usage
+
+```typescript
+import { AckMessageSchema, CursorMessageSchema, CursorPositionSchema, DocumentStateSchema, EditMessageSchema, EditOperationSchema, EditOperationTypeSchema, ErrorMessageSchema, EventFilterSchema, EventFilterConditionSchema, EventMessageSchema, EventPatternSchema, EventSubscriptionSchema, FilterOperatorSchema, PingMessageSchema, PongMessageSchema, PresenceMessageSchema, PresenceStateSchema, PresenceUpdateSchema, SubscribeMessageSchema, UnsubscribeMessageSchema, UnsubscribeRequestSchema, WebSocketConfigSchema, WebSocketMessageSchema, WebSocketMessageTypeSchema, WebSocketPresenceStatusSchema } from '@objectstack/spec/api';


The TypeScript import example references schema exports like FilterOperatorSchema, EditOperationTypeSchema, WebSocketMessageTypeSchema, etc., but packages/spec/src/api/websocket.zod.ts exports FilterOperator, EditOperationType, WebSocketMessageType, etc. (no Schema suffix). Update the example to match actual exports to prevent copy/paste errors.

Suggested change

import { AckMessageSchema, CursorMessageSchema, CursorPositionSchema, DocumentStateSchema, EditMessageSchema, EditOperationSchema, EditOperationTypeSchema, ErrorMessageSchema, EventFilterSchema, EventFilterConditionSchema, EventMessageSchema, EventPatternSchema, EventSubscriptionSchema, FilterOperatorSchema, PingMessageSchema, PongMessageSchema, PresenceMessageSchema, PresenceStateSchema, PresenceUpdateSchema, SubscribeMessageSchema, UnsubscribeMessageSchema, UnsubscribeRequestSchema, WebSocketConfigSchema, WebSocketMessageSchema, WebSocketMessageTypeSchema, WebSocketPresenceStatusSchema } from '@objectstack/spec/api';

import { AckMessageSchema, CursorMessageSchema, CursorPositionSchema, DocumentStateSchema, EditMessageSchema, EditOperationSchema, EditOperationType, ErrorMessageSchema, EventFilterSchema, EventFilterConditionSchema, EventMessageSchema, EventPatternSchema, EventSubscriptionSchema, FilterOperator, PingMessageSchema, PongMessageSchema, PresenceMessageSchema, PresenceStateSchema, PresenceUpdateSchema, SubscribeMessageSchema, UnsubscribeMessageSchema, UnsubscribeRequestSchema, WebSocketConfigSchema, WebSocketMessageSchema, WebSocketMessageType, WebSocketPresenceStatus } from '@objectstack/spec/api';

Initial plan

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Copilot AI assigned Copilot and hotlong Jan 30, 2026

Copilot started work on behalf of hotlong January 30, 2026 06:29 View session

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Copilot AI changed the title ~~[WIP] Enhance WebSocket event protocol schemas~~ feat: Add WebSocket and real-time collaboration protocol specifications Jan 30, 2026

Copilot AI requested a review from hotlong January 30, 2026 06:42

Copilot finished work on behalf of hotlong January 30, 2026 06:42

github-actions bot added documentation Improvements or additions to documentation protocol:system tests size/xl labels Jan 30, 2026

hotlong approved these changes Jan 30, 2026

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hotlong marked this pull request as ready for review January 30, 2026 07:03

Copilot AI review requested due to automatic review settings January 30, 2026 07:03

hotlong merged commit 39452e3 into main Jan 30, 2026
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feat: Add WebSocket and real-time collaboration protocol specifications#376

feat: Add WebSocket and real-time collaboration protocol specifications#376
hotlong merged 2 commits intomainfrom
copilot/enhance-websocket-event-protocol

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WebSocket Event Protocol (api/websocket.zod.ts)

Real-Time Collaboration Protocol (system/collaboration.zod.ts)

Technical Notes

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Copilot AI commented Jan 30, 2026 •

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WebSocket Event Protocol (`api/websocket.zod.ts`)

Real-Time Collaboration Protocol (`system/collaboration.zod.ts`)

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