Mastra

Mastra is an opinionated TypeScript framework for AI agents and workflows. Mirage ships a tool factory that exposes a Workspace as five createTool() instances (execute, readFile, writeFile, editFile, ls) ready to plug into new Agent({ tools }).

Node only. The Mirage adapter is runtime-agnostic, but most Mastra setups (memory, evals, workflows) depend on Node APIs.

Install

pnpm add @struktoai/mirage-agents @struktoai/mirage-node @mastra/core

Usage

import { MountMode, OpsRegistry, RAMResource, Workspace } from '@struktoai/mirage-node'
import { Agent } from '@mastra/core/agent'
import { mirageTools } from '@struktoai/mirage-agents/mastra'
import { buildSystemPrompt } from '@struktoai/mirage-agents/openai'

const ram = new RAMResource()
const ops = new OpsRegistry()
for (const op of ram.ops()) ops.register(op)
const ws = new Workspace({ '/': ram }, { mode: MountMode.WRITE, ops })

const agent = new Agent({
  id: 'mirage-ram-agent',
  name: 'Mirage RAM Agent',
  instructions: buildSystemPrompt({
    mountInfo: { '/': 'In-memory filesystem (read/write)' },
  }),
  model: 'openai/gpt-5.4-mini',
  tools: mirageTools(ws),
})

const result = await agent.generate(
  "Create /hello.txt with 'hi from mirage' and list every file under /.",
  { maxSteps: 20 },
)
console.log(result.text)

Exports

Symbol	Purpose
`mirageTools(ws)`	Returns `{ execute, readFile, writeFile, editFile, ls }`, each a `createTool()` from `@mastra/core/tools` with stable `id`s (`mirage-execute`, `mirage-read-file`, …).

Tool reference

Tool id	Input	Output
`mirage-execute`	`{ command: string }`	`{ stdout, stderr, exitCode }`
`mirage-read-file`	`{ path: string }`	`{ content? , error? }`
`mirage-write-file`	`{ path, content }`	`{ path }` (auto-mkdirs parent)
`mirage-edit-file`	`{ path, oldString, newString, replaceAll? }`	`{ path?, occurrences?, error? }`
`mirage-ls`	`{ path: string }`	`{ files?: { path, is_dir }[], error? }`

The execute signature follows Mastra v1: execute(inputData, context). You don’t need to call it directly, the agent runtime invokes it on tool calls.

Examples

examples/typescript/agents/mastra/ram_mastra.ts, RAM-only sandbox driven by gpt-5.4-mini.

Getting Started

Agents

Resources

Runtimes

Install

Usage

Exports

Tool reference

Examples

​Install

​Usage

​Exports

​Tool reference

​Examples

Install

Usage

Exports

Tool reference

Examples