managed-deepagents

Python authoring package and CLI launcher for Managed Deep Agents.

[!IMPORTANT] Public beta. Managed Deep Agents is in public beta. The PyPI package API and managed runtime contract may change. See the docs for getting started and updates.

managed-deepagents is the PyPI package for authoring Managed Deep Agents in Python. It includes:

define_deep_agent, the Python authoring contract for managed agents.
define_schedule, the Python contract for managed cron schedules.
mda, the CLI used to build and deploy your agent to LangSmith.
managed_deepagents.runtime, the runtime helper used by generated managed entry modules.

Install

uv tool install managed-deepagents

[!NOTE] Private beta: dev releases only. We currently publish only PEP 440 pre-release (dev) versions and no stable version yet. uv skips pre-releases by default unless they are allowed explicitly:
uv tool install --prerelease allow managed-deepagents

This package requires Python 3.9 or newer. Each platform wheel bundles the prebuilt mda binary for its OS and CPU architecture and exposes it through the mda console script. This PyPI-installed CLI scaffolds and compiles Python projects only and vendors the Python runtime bundled with this wheel.

To start a new project, run mda init. In a terminal, the CLI asks you to name the agent:

mda init

Run mda init -i to initialize your agent interactively and optionally hand it off to a coding agent to build:

mda init -i

Choose a coding agent to continue in the new project, or select View raw prompt to copy the setup instructions.

For coding agents and other headless use, pass the project name:

mda init my-agent

mda init can shape the project up front — --instructions "..." (or --instructions-file <path>) writes the system prompt, --model <spec> picks the model, --memory agent opts into deployment-shared durable memory, --no-sandbox leaves out the sandbox, and -c slack (also --channel / --channels) writes channels/slack.py. Every new project includes an identity.py that explicitly selects auth.langsmith_api_key() authentication.

Evaluate

Managed Deep Agent evals run in Harbor. Install uv and Docker before running them.

From the project root, initialize the eval workspace:
```
mda evals init -i
```
Follow the coding-agent prompt to author tasks directly under evals/<task>/. The CLI creates the user-owned evals/harbor-job.json once and preserves later edits. .mda/evals/ is generated. A task may include an authored evals/<task>/identity.json fixture. It requires a non-empty user.id; user.kind, user.email, and top-level groups, claims, and source.provider are optional. Keep it with the task, not in generated .mda/evals/.
Export LANGSMITH_API_KEY, LANGSMITH_WORKSPACE_ID when your credentials require it, and the model or tool credential variables used by the agent.
From the same project root, run the pinned Harbor 0.21.0 command included at the end of the coding-agent prompt. The command loads MDAJobPlugin and LangSmithPlugin. It uses POSIX syntax on macOS/Linux and PowerShell on native Windows.

From the same project root, inspect results:

uv run --python 3.12 --with 'harbor[langsmith]==0.21.0' harbor view .mda/evals/jobs

MDAJobPlugin compiles a fresh eval artifact at every Harbor job start. This POC keeps MDA's custom Harbor adapter; migration to Harbor's built-in LangGraph agent is deferred.

Define an Agent

Create an agent.py that defines an agent:

from managed_deepagents import define_deep_agent

# The system prompt comes from instructions.md next to this file.
agent = define_deep_agent(
    name="research-assistant",
    model="openai:gpt-5.5",
    tools=[query_db],
)

define_deep_agent requires a static name (LangGraph assistant id and default LangSmith deployment name) and otherwise accepts the create_deep_agent keyword surface minus the managed keys: backend, store, checkpointer, memory, skills, and system_prompt. Those are provided by the managed runtime when your agent is deployed. Write the system prompt in instructions.md next to agent.py; the CLI embeds it at deploy time.

To authenticate SDK and API requests with a LangSmith workspace key while retaining MDA's thread and store authorization, declare it explicitly:

identity = define_identity(auth=auth.langsmith_api_key())

Clients send the key as x-api-key. LangSmith Cloud supplies the verification endpoint and tenant configuration; do not add those platform-owned values to the project .env.

On deploy, Context Hub stores harness files (instructions.md, skills/**). A root memory.py declaring define_memory(scope="agent") additionally mounts one deployment-shared memory tree at /memories/agent/. /memories/agent/AGENTS.md is injected every turn; other files are read on demand. Deploy never overwrites existing memories. Memory is independent of identity, and a project without memory.py mounts no durable memory.

Project Shape

my-agent/
  agent.py              # named `agent` variable
  identity.py           # managed authentication (included by `mda init`)
  instructions.md       # managed system prompt
  pyproject.toml
  .env                  # local deploy secrets, never committed
  schedules/            # optional managed cron schedules
  tools/                # optional custom tools and MCP declaration
    mcp.py              # optional MCP server declaration
  middleware/           # optional middleware
  skills/               # optional skills synced to Context Hub
  sandbox/              # LangSmith sandbox (`mda init` includes this; delete to opt out)

The CLI copies your project files into the managed build and generates the entry module that connects your definition to the hosted runtime.

The agent entry must live at the project root as agent.py.

Define a Schedule

Create one file per schedule under schedules/ and define a named schedule:

# schedules/daily_digest.py
from managed_deepagents import define_schedule

schedule = define_schedule(
    cron="0 8 * * 1-5",
    timezone="America/Los_Angeles",
    prompt="Write the daily digest.",
)

mda deploy reconciles schedules as LangSmith cron jobs after the deployment is live. Declarations must be statically serializable literals or top-level constants; prompt schedules become user-message input, and stateless runs clean up their temporary thread after completion.

Sandbox

mda init scaffolds sandbox/__init__.py with a LangSmith sandbox. MDA only enables the sandbox when that declaration is present — delete sandbox/ to opt out:

from managed_deepagents import define_sandbox

sandbox = define_sandbox(
    idle_ttl_seconds=600,
)

If sandbox/setup.sh exists, mda deploy / mda dev bake it into a recipe snapshot once; thread sandboxes clone that snapshot and do not re-run setup. MDA owns sandbox naming, image/snapshot selection, reuse, and lifecycle.

Private published images can declare registry credentials by environment variable name; MDA creates or updates the deployment-owned Host registry:

sandbox = define_sandbox(
    docker_image="ghcr.io/acme/agent-base:1",
    registry={
        "url": "ghcr.io",
        "username": "octocat",
        "password_env": "GHCR_TOKEN",
    },
)

Put GHCR_TOKEN in the project .env or process environment. Its value is used only to reconcile the registry and never enters the build or snapshot.

MCP Servers

Add tools/mcp.py to attach MCP servers. The file must define a module-level mcp. By default, MDA exposes every tool loaded from each declared server. In mda dev, an agent-owned connection reads from MDA_DEV_<SLUG> with the slug uppercased and hyphens changed to underscores. Hosted deployments resolve workspace connections from Agent Auth:

The old connectors/mcp.py file API remains available with a warning during 0.7.x. It will be removed in 0.8.0.

from managed_deepagents import define_mcp, connections

mcp = define_mcp(
    servers={
        "langchainDocs": {
            "transport": "http",
            "url": "https://docs.langchain.com/mcp",
            "include_tools": ["search", "fetch"],
            "connection": connections.get("docs-token", {"type": "agent"}),
        },
    },
)

For this example, set MDA_DEV_DOCS_TOKEN.

A user-owned connection — connections.get(slug, {"type": "user"}) — resolves per caller (OAuth or opaque). Any runtime access interrupts the run when a grant is missing, including access from a custom tool or middleware. Connector declarations use the same behavior in a pre-run gate, so all known grants can be requested before the first model call. This path works in mda deploy and mda dev when LANGSMITH_API_KEY and LANGSMITH_WORKSPACE_ID are set and the workspace connection rows exist. Signed-in Studio users are identified by their LangSmith ls_user_id. Local development uses separate user connections from deployed Studio. OAuth completes on LangSmith’s platform callback URL. The local UI must show credential_authorization_required and resume after the user connects.

Deploy the project first, then provision its connections with mda connections create. Agent-owned opaque secrets are scoped to that deployment, so the command refuses to create one before mda deploy. mda deploy fails when a slug a project declares is missing from the workspace.

Use include_tools or exclude_tools inside a server config to select a subset. Tool names are raw MCP tool names before the managed {server}__ prefix is applied, so "include_tools": ["search"] on server langchainDocs exposes langchainDocs__search when prefixing is enabled.

CLI

Create a new project:

mda init my-agent

Build locally:

mda build ./my-agent

Run on the local LangGraph dev server:

mda dev ./my-agent

mda dev requires uv on PATH, but it resolves the local LangGraph dev server automatically; you do not need to install a global langgraph command.

Deploy to LangSmith:

mda deploy ./my-agent

The generated build is written to <root>/.mda/build by default.

Common deploy options:

mda deploy ./my-agent --name my-agent-dev --deployment-type dev
mda deploy ./my-agent --workspace-id "$LANGSMITH_WORKSPACE_ID"
mda deploy ./my-agent --no-wait

Read the deployed agent's server logs:

mda logs ./my-agent
mda logs ./my-agent --lines 200 --level error
mda logs ./my-agent > agent.log

In a terminal mda logs streams new output until you press Ctrl-C. When the output is piped or redirected it prints the most recent lines (1000 by default) and exits.

Tear it down again:

mda delete ./my-agent

mda delete (alias mda destroy) removes the LangSmith deployment, the tracing project created alongside it, the deployment's Context Hub repo (plus any legacy per-user or org child memory repos left from older runtimes), and the managed sandboxes the deployment created. It asks for confirmation first; pass --yes to skip the prompt in scripts. Agent memory and thread history are not recoverable afterwards.

Sandboxes are matched by name: the runtime names each one {deployment}--{digest} of the thread id, which also lets a restarted deployment re-adopt its existing sandbox instead of stranding it. Recipe changes (setup.sh or bake base) produce a new deploy-time snapshot; live threads keep their boxes until reclaim. Sandboxes created before this behavior existed are unnamed and are left to LangSmith's idle-stop and retention window.

Before deploying, make sure your model provider key such as OPENAI_API_KEY or ANTHROPIC_API_KEY is available in the project .env or LangSmith workspace secrets; a value exported in your shell is not deployed. For LangSmith itself, set LANGSMITH_API_KEY in .env or your shell, or run interactively and press Enter at the prompt to sign in with your browser (the CLI creates a key and writes it to .env). Use LANGSMITH_WORKSPACE_ID or --workspace-id when your credentials require a workspace selection.

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