# AsDecided (MCP server)

> AsDecided is an MCP server that reads-only access to deterministic engineering decisions stored in a local repository. It has 296 GitHub stars, is released under the Apache-2.0 license and runs locally with docker run -i --rm ghcr.io/asdecided/core:mcp-v0.31.2. It works with Claude Desktop, Claude Code, Cursor and VS Code.

Engineering decisions your agents can follow. Build, as decided. AsDecided keeps requirements, decisions, designs, roadmaps, and prompts as typed Markdown in your repository. Its native Rust engine validates that knowledge, retrieves relevant decisions deterministically, and serves it read-only to agents over MCP.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/asdecided/core |
| GitHub stars | 296 |
| License | Apache-2.0 |
| Language | Rust |
| Transport | stdio |
| Packages | docker: ghcr.io/asdecided/core:mcp-v0.31.2 |
| Remote URL | none |
| Needs API key | no |
| Official | no |
| Works with | Claude Desktop, Claude Code, Cursor, VS Code |
| Category | Other |
| Latest release | v0.31.2 (Oct 5, 2026) |
| Last commit | Oct 5, 2026 |
| MCP registry name | io.github.asdecided/core |

## Install

### Claude Desktop (claude_desktop_config.json)

```json
{
  "mcpServers": {
    "asdecided": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/asdecided/core:mcp-v0.31.2"
      ]
    }
  }
}
```

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

### Claude Code

```sh
claude mcp add --transport stdio asdecided -- docker run -i --rm ghcr.io/asdecided/core:mcp-v0.31.2
```

### Cursor (.cursor/mcp.json)

```json
{
  "mcpServers": {
    "asdecided": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/asdecided/core:mcp-v0.31.2"
      ]
    }
  }
}
```

Project file; use ~/.cursor/mcp.json to enable it in every project.

### VS Code (.vscode/mcp.json)

```json
{
  "servers": {
    "asdecided": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "ghcr.io/asdecided/core:mcp-v0.31.2"
      ]
    }
  }
}
```

Config formats checked against the official docs on 2026-10-07.

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---

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