chore(workflow-engine): 封包发布到 npm

- 移除 private，补全 exports/types/files/publishConfig/license/repository 等
- 添加 LICENSE (MIT) 与 README
- 添加 scripts/build.ts + tsconfig.build.json，用 tsc emit 输出 dist/**/*.js + .d.ts
  （Bun bundle + external zod 会丢失 createWorkflowTool/workflowInputSchema/persistInlineScript 符号，改用 tsc emit）
- 修 src/index.ts 的 WORKFLOW_TOOL_NAME 重复 export；tool/* 的 named re-export 改为 import + 再 export

Co-Authored-By: glm-5.2 <zai-org@claude-code-best.win>

packages/workflow-engine/README.md

@@ -0,0 +1,71 @@
+# @claude-code-best/workflow-engine
+
+Deterministic JS script orchestration engine for multi-agent workflows. The core layer has zero runtime dependencies and talks to the outside world exclusively through **port adapters** — you bring your own agent backend, journal store, and progress sink.
+
+## Why
+
+When you orchestrate multiple LLM agents, you want the orchestration itself to be **deterministic, replayable, and testable**. This engine runs a plain JS script (compiled by Bun's transpiler) with primitives like `agent()`, `phase()`, `parallel()` and `pipeline()`. The non-deterministic parts (the LLM, the file system, the clock) are isolated behind ports, so the same script produces the same journal on every replay.
+
+## Installation
+
+```bash
+bun add @claude-code-best/workflow-engine
+# or
+npm install @claude-code-best/workflow-engine
+```
+
+Runtime peer requirements: `ajv` and `zod` are pulled in automatically as dependencies.
+
+## Minimal example
+
+```ts
+import {
+  createFileJournalStore,
+  createHostHandle,
+  runWorkflow,
+  type WorkflowPorts,
+} from '@claude-code-best/workflow-engine'
+
+const script = `
+export const meta = { name: 'hello', description: 'minimal demo' }
+phase('Greet')
+const reply = await agent({ prompt: 'Say hi in one short sentence.' })
+emit('result', { reply })
+`
+
+const ports: WorkflowPorts = {
+  // Provide your own agent runner + journal + progress emitter.
+  // See examples/smoke.ts for a complete Anthropic SDK wiring.
+} as WorkflowPorts
+
+const handle = createHostHandle()
+await runWorkflow({
+  script,
+  ports,
+  workflowDir: '.wfe/runs/hello',
+  hostHandle: handle,
+})
+```
+
+For a fully wired end-to-end example with the Anthropic SDK, see [`examples/smoke.ts`](./examples/smoke.ts).
+
+## Core primitives
+
+- `agent(params)` — call the configured AgentRunner; supports structured-output via JSON Schema.
+- `phase(name)` — declare a logical phase (display + progress grouping).
+- `parallel([...])` — barrier-style fan-out with bounded concurrency.
+- `pipeline(stream, fn)` — streaming pipeline with per-item hooks.
+- `emit(type, payload)` — emit a progress event to the host.
+- `log.*` / hooks / budgets — see the TypeScript definitions for the full surface.
+
+## Building from source
+
+```bash
+bun install            # from the repo root
+bun run build          # outputs dist/index.js + dist/**/*.d.ts
+bun test               # 178 tests
+```
+
+## License
+
+MIT © claude-code-best