refactor(workflow): scaffold @uncaged/workflow, move types from core

- Create packages/workflow/ with types.ts (from core/workflow.ts) and config.ts
- Core re-exports workflow types from @uncaged/workflow
- Delete packages/core/src/workflow.ts

Phase 1+2 of #320, Testing: #321

packages/core/package.json

@@ -20,6 +20,7 @@
     "test": "vitest run"
   },
   "dependencies": {
+    "@uncaged/workflow": "workspace:*",
     "yaml": "^2.8.3"
   },
   "devDependencies": {

packages/core/src/config.ts

@@ -1,7 +1,14 @@
 import { parse } from "yaml";
 
+import {
+  DEFAULT_ENGINE_MAX_ROUNDS,
+  type DropOverflowConfig,
+  type QueueOverflowConfig,
+  type WorkflowConfig,
+} from "@uncaged/workflow";
 import { type Result, err, isPlainRecord, ok, parseDurationStringToMs } from "./util.js";
-import { DEFAULT_ENGINE_MAX_ROUNDS } from "./workflow.js";
+
+export type { DropOverflowConfig, QueueOverflowConfig, WorkflowConfig };
 
 export type SenseConfig = {
   group: string;
@@ -14,19 +21,6 @@ export type SenseConfig = {
   on: string[];
 };
 
-export type DropOverflowConfig = {
-  concurrency: number;
-  overflow: "drop";
-};
-
-export type QueueOverflowConfig = {
-  concurrency: number;
-  overflow: "queue";
-  maxQueue: number;
-};
-
-export type WorkflowConfig = DropOverflowConfig | QueueOverflowConfig;
-
 /** Optional HTTP control plane. When `port` is null, the HTTP server is not started. */
 export type NerveApiConfig = {
   port: number | null;

packages/core/src/index.ts

@@ -25,8 +25,8 @@ export type {
   ModeratorContext,
   Moderator,
   WorkflowDefinition,
-} from "./workflow.js";
-export { START, END, DEFAULT_ENGINE_MAX_ROUNDS } from "./workflow.js";
+} from "@uncaged/workflow";
+export { START, END, DEFAULT_ENGINE_MAX_ROUNDS } from "@uncaged/workflow";
 export type { Schema, ExtractFn } from "./agent.js";
 export { ExtractError } from "./agent.js";
 export type { Result } from "./util.js";

packages/workflow/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "@uncaged/workflow",
+  "version": "0.5.0",
+  "type": "module",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
+    }
+  },
+  "files": ["dist"],
+  "publishConfig": {
+    "access": "public"
+  },
+  "scripts": {
+    "prepublishOnly": "bash ../../scripts/prepublish-check.sh",
+    "build": "rslib build"
+  },
+  "devDependencies": {
+    "@rslib/core": "^0.21.3",
+    "@types/node": "^22.0.0"
+  }
+}

packages/workflow/rslib.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig } from "@rslib/core";
+
+export default defineConfig({
+  lib: [
+    {
+      format: "esm",
+      dts: true,
+    },
+  ],
+  source: {
+    entry: {
+      index: "src/index.ts",
+    },
+  },
+  output: {
+    target: "node",
+    cleanDistPath: true,
+  },
+});

packages/workflow/src/config.ts

@@ -0,0 +1,12 @@
+export type DropOverflowConfig = {
+  concurrency: number;
+  overflow: "drop";
+};
+
+export type QueueOverflowConfig = {
+  concurrency: number;
+  overflow: "queue";
+  maxQueue: number;
+};
+
+export type WorkflowConfig = DropOverflowConfig | QueueOverflowConfig;

packages/workflow/src/index.ts

@@ -0,0 +1,19 @@
+// @uncaged/workflow — standalone workflow orchestration engine
+
+export { START, END, DEFAULT_ENGINE_MAX_ROUNDS } from "./types.js";
+export type {
+  WorkflowMessage,
+  RoleResult,
+  Role,
+  RoleMeta,
+  StartStep,
+  ThreadContext,
+  WorkflowContext,
+  AgentFn,
+  RoleStep,
+  ModeratorContext,
+  Moderator,
+  WorkflowDefinition,
+} from "./types.js";
+
+export type { DropOverflowConfig, QueueOverflowConfig, WorkflowConfig } from "./config.js";

packages/workflow/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "dist",
+    "rootDir": "src",
+    "composite": false
+  },
+  "include": ["src"]
+}

pnpm-lock.yaml

@@ -86,6 +86,9 @@ importers:
 
   packages/core:
     dependencies:
+      '@uncaged/workflow':
+        specifier: workspace:*
+        version: link:../workflow
       yaml:
         specifier: ^2.8.3
         version: 2.8.3
@@ -215,6 +218,15 @@ importers:
         specifier: ^4.1.5
         version: 4.1.5(@types/node@22.19.17)(vite@8.0.9(@types/node@22.19.17)(esbuild@0.27.7)(yaml@2.8.3))
 
+  packages/workflow:
+    devDependencies:
+      '@rslib/core':
+        specifier: ^0.21.3
+        version: 0.21.3(typescript@5.9.3)
+      '@types/node':
+        specifier: ^22.0.0
+        version: 22.19.17
+
   packages/workflow-meta:
     dependencies:
       '@uncaged/nerve-core':