SereinFlow

中文文档 | Chinese documentation

SereinFlow is a web-first workflow orchestration and execution system. It combines a visual web console, an ASP.NET Core API, isolated Worker Runner processes, and an MCP service for AI-tool integration.

Project Overview

SereinFlow is used to create, maintain, and run project workflows. The web console manages projects, flows, versions, runs, and environment settings. The API coordinates persisted data and execution requests, while untrusted scripts and plugins run only in separate Worker Runner processes. The MCP service exposes controlled tools, resources, and prompts so AI clients can work with SereinFlow safely.

Path	Purpose
src/SereinFlow.Api	ASP.NET Core API and the HTTP/stdio MCP host.
src/SereinFlow.SDK	Typed HTTP client SDK for third-party applications.
frontend/sereinflow-web	Vue + Vite web console.
plugins/sereinflow-ai-toolkit	Local MCP client and Skill source material.
docs	Maintained technical references.

Community & Technical Support

If you need help using SereinFlow, join the QQ group 955830545 to contact me for technical support, usage discussions, or issue feedback.

Prerequisites

• .NET SDK 10.0.100 or a compatible SDK selected by global.json.
• Node.js 24.19.0, as defined in .node-version, and npm 11.6.2.
• Windows is assumed for the environment-variable and Codex instructions below. The API and frontend commands are otherwise standard .NET and npm commands.

Projects that use SereinLang rely on the pinned source snapshot under src/ThirdParty/SereinScript. A normal SereinFlow build needs neither a separate SereinScript checkout nor a path environment variable.

Run Locally

1. Start the API

From the repository root, run:

dotnet run --project .\src\SereinFlow.Api\SereinFlow.Api.csproj

By default, the API and HTTP MCP service listen on http://127.0.0.1:8188, with MCP available at http://127.0.0.1:8188/mcp. The first start initializes local data under the configured data directory.

2. Start the Web Console

Open a second terminal and run:

Set-Location .\frontend\sereinflow-web
npm ci
npm run dev

Open the URL printed by Vite, usually http://localhost:5173. The development server proxies /api and /hubs to http://127.0.0.1:8188 by default. Set VITE_API_PROXY_TARGET before starting the frontend when the API uses another address.

Configure the MCP Service

The following workflow configures an HTTP MCP client for a locally running SereinFlow instance. Start both the API and the web console before continuing.

1. Generate the Administrator Key

In the web console's home menu, open Environment settings, find MCP access keys, and select Generate first key. Save the administrator key shown there. It normally begins with sfk_..., and the complete Secret is shown only once when it is created or rotated.

2. Add the Environment Variable

In Windows Edit environment variables for your account, add a user variable named SEREINFLOW_MCP_API_KEY whose value is the complete key you just generated. Alternatively, run this PowerShell command, replacing the example value with the real key:

setx SEREINFLOW_MCP_API_KEY "sfk_replace_with_your_complete_secret"

After running setx or saving the system setting, close and reopen terminals and AI tools. Existing processes do not receive the new variable automatically.

3. Create a Local Skill for Your AI Tool

Ask the AI tool you use to create a local Skill from the contents of plugins/sereinflow-ai-toolkit. Its .mcp.json defines the local HTTP MCP endpoint and the SEREINFLOW_MCP_API_KEY credential variable, while SKILL.md defines the connection, diagnostics, capability-discovery, and safe-operation rules.

Preserve the following connection contract when creating the Skill. Never put the real key in the repository, a Skill file, or logs:

{
  "mcpServers": {
    "sereinflow": {
      "type": "http",
      "url": "http://127.0.0.1:8188/mcp",
      "bearer_token_env_var": "SEREINFLOW_MCP_API_KEY"
    }
  }
}

4. Verify the MCP Service

First confirm that the route is reachable. With the API running, the following command is expected to print 405. That means the /mcp route is listening; MCP requests must use POST.

try {
  Invoke-WebRequest -Method Get http://127.0.0.1:8188/mcp -ErrorAction Stop
} catch {
  [int]$_.Exception.Response.StatusCode
}

Then start a new AI-tool session, connect to the sereinflow MCP server, and discover tools/list, resources/list, resources/templates/list, and prompts/list. A successful initialization and returned catalogs confirm that MCP authentication and the service are working.

• A 401 normally means the endpoint and route are reachable but the key is missing, invalid, expired, or revoked.
• Connection refusal or a timeout means the API is not reachable at 127.0.0.1:8188.

5. Complete Setup

Local MCP setup is complete once the AI tool can initialize and discover the MCP tools, resources, and prompts.

Use SereinFlow MCP in Codex

Codex's default safety policy can block this environment variable from being passed to Shell and command-line environments it launches. To use the SereinFlow MCP service in Codex, add the following to %USERPROFILE%\.codex\config.toml. If this table already exists, add only the variable line and do not declare the table twice:

[shell_environment_policy.filters]
SEREINFLOW_MCP_API_KEY = "include"

Fully restart Codex and start a new task. This rule allows Codex-launched Shells to receive the variable; the MCP HTTP client must still use the bearer_token_env_var configuration shown above to read it.

Build and Verify Locally

dotnet restore SereinFlow.sln
dotnet build SereinFlow.sln --no-restore
dotnet test SereinFlow.sln --no-build

Set-Location frontend/sereinflow-web
npm ci
npm run build

To verify the full publish layout for an upload library, publish tests/SereinFlow.TestLibrary. The command creates artifacts/libraries/SereinFlow.TestLibrary-1.6.1.zip with the complete publish output and required archive layout:

dotnet publish tests\SereinFlow.TestLibrary\SereinFlow.TestLibrary.csproj -c Release

Documentation

• Documentation index
• MCP service reference
• .NET client SDK
• Worker protocol (v2 current, v1 historical compatibility)
• 中文文档索引 | Chinese documentation index

Security Notes

An MCP key is a credential, not project configuration. Do not commit an sfk_... key to Git or place it in .env examples, test data, Skill files, prompts, or logs. Rotate or revoke a key from Environment settings when it is exposed, lost, or no longer needed.