Docker Packaging

Spawnfile can generate Docker container artifacts as part of the compile process. This gives you a way to build and run compiled agents against real runtimes using standard Docker tooling.

Core Rule

One compile = one container.

The compiler walks the full graph from the root Spawnfile. Everything it resolves — agents, subagents, team members — lands in a single container image. This applies regardless of how many Spawnfiles are in the graph, how many agents are resolved, or how many distinct runtimes appear.

Output Layout

The compiler emits container artifacts at the compile output root alongside the runtime-specific output:

.spawn/
  Dockerfile
  entrypoint.sh
  .env.example
  container/
    rootfs/
      var/lib/spawnfile/instances/...
  runtimes/
    openclaw/agents/analyst/...
    picoclaw/agents/editor/...
  spawnfile-report.json

• Dockerfile and entrypoint.sh are generated by the compiler based on the resolved graph.
• runtimes/ is the human-inspectable adapter output.
• container/rootfs/ is the final container filesystem for build-time placement into the runtime’s expected paths.

Dockerfile Generation

Base Image

Each runtime adapter declares container metadata including:

• A standalone base image or install strategy aligned with the pinned runtime ref
• System dependencies
• Expected config and workspace paths inside the container
• The start command and required runtime environment

For single-runtime compiles, the Dockerfile uses that runtime’s base image directly. For multi-runtime compiles, the Dockerfile uses a common base and installs each runtime.

Pinned Versions

The runtime version used in the Dockerfile matches the pinned ref from runtimes.yaml. This keeps the container aligned with the runtime version the adapters were written against.

The compile step does not require local runtime clones. The Docker build step is responsible for fetching or installing the pinned runtime artifact.

Entrypoint Generation

The entrypoint script handles:

1. Validating required environment variables and files
2. Materializing env-backed secret files when a runtime expects file-based auth
3. Starting the runtime process(es)

Single-Runtime Agents

For a single runtime, the compiler pre-places config and workspace files into final runtime paths under container/rootfs/. The entrypoint stays minimal:

• Validate required env vars
• Validate compiled config exists at the expected path
• Write env-backed secret files when needed
• exec the runtime’s start command

Multi-Runtime Teams

For multiple runtimes in one container, the entrypoint:

• Validates required env and config for each target
• Writes env-backed secret files for each target
• Starts each runtime process
• Traps signals and forwards them to all child processes
• Waits for all processes

Process Mapping

Project Type	Container Behavior
Single agent	One runtime process, one config
Agent with subagents	One runtime process — the runtime manages subagent delegation
Team on one runtime	One runtime process with multi-agent config, or one process per agent
Team on multiple runtimes	One process group, one runtime process per distinct runtime

Environment and Secrets

The compiler emits a .env.example listing all required and optional environment variables:

• Secrets declared in manifests (e.g. SEARCH_API_KEY)
• Model auth variables for providers using api_key auth (e.g. ANTHROPIC_API_KEY)
• Surface auth variables for declared communication surfaces (e.g. DISCORD_BOT_TOKEN, TELEGRAM_BOT_TOKEN, SLACK_BOT_TOKEN, SLACK_APP_TOKEN)
• Runtime auth variables (e.g. OPENCLAW_GATEWAY_TOKEN)
• Variables the entrypoint or runtime expects

Actual secret values are never emitted. The .env.example contains variable names with empty values and comments.

If a runtime expects secret file references in its config, the adapter declares env-to-file bindings and the entrypoint materializes them before startup.

Auth Profiles

Spawnfile manages runtime and model auth through local auth profiles. This keeps secrets out of the build and injects them only at run time.

Syncing Auth

The primary happy path is spawnfile auth sync, which reads model auth intent from the project’s manifests and imports matching local credentials into a named profile:

spawnfile auth sync fixtures/single-agent --profile dev --env-file ./.env

This reads the declared auth methods on each model target and surface, then imports the matching material. For example, if the manifest declares auth.method: claude-code, the sync imports your local Claude Code CLI credentials. If it declares auth.method: api_key, it reads the key from the provided env file.

auth sync also reads declared project secrets from environment.secrets: and inherited team shared.environment.secrets:. Required secrets must be present in the process environment or the provided env file. Optional secrets are copied into the profile only when a value is available.

environment:
  secrets:
    - name: GH_TOKEN
      required: true

spawnfile auth sync ./agents/episode-worker --profile dev --env-file ./ops/secrets/episode-worker.env
spawnfile run ./agents/episode-worker --auth-profile dev

This is the clean path for repository tokens, MCP tokens, and runtime-specific credentials that should be supplied externally instead of committed into the Spawnfile project.

Manual Auth Import

Lower-level commands are available for manual profile editing:

# Import a .env file into a profile
spawnfile auth import-env --profile dev --env-file ./.env

# Import Claude Code CLI credentials
spawnfile auth import-claude-code --profile dev

# Import Codex CLI credentials
spawnfile auth import-codex --profile dev

Viewing Profiles

# List all auth profiles
spawnfile auth list

# Show details of a profile
spawnfile auth show --profile dev

Auth Methods

Method	What Gets Imported
api_key	Provider API key from env file
claude-code	Local Claude Code CLI credential store
codex	Local Codex CLI credential store
none	Nothing — used for local models

claude-code and codex imports mount existing local CLI credential stores into runtime homes at spawnfile run time. api_key is the primary path for provider API keys passed as environment variables.

Developer Workflow

For local development, spawnfile up is the one-command path after auth is synced:

# Sync declared model auth into a local profile
spawnfile auth sync fixtures/single-agent --profile dev --env-file ./.env

spawnfile up fixtures/single-agent --out ./bundle/single-agent --tag my-agent --auth-profile dev

Use the split-step build and run flow when you want to inspect, extend, or publish the image between steps:

# Compile and build the container
spawnfile build fixtures/single-agent --out ./bundle/single-agent --tag my-agent

# Run with the local auth profile
spawnfile run fixtures/single-agent --out ./bundle/single-agent --tag my-agent --auth-profile dev

For teams:

spawnfile auth sync fixtures/multi-runtime-team --profile dev --env-file ./.env
spawnfile build fixtures/multi-runtime-team --out ./bundle/team --tag my-team
spawnfile run fixtures/multi-runtime-team --out ./bundle/team --tag my-team --auth-profile dev

The same commands apply regardless of project complexity. Use up for one-command local startup, or use build and run when you want explicit image staging.

spawnfile build stays secrets-free by default. It compiles the project and then runs docker build against the emitted output directory. The generated Dockerfile installs pinned compiled runtime artifacts — it does not rebuild runtime sources during image build.

spawnfile run is the auth-aware wrapper over docker run. It validates declared model auth before container startup, mounts the right credential material from the selected profile, and attaches any persistent volumes reported by the compiler.

Command boundaries:

• spawnfile compile validates the graph and writes runtime output, container artifacts, and the compile report.
• spawnfile build runs compile, then builds a Docker image from the generated output.
• spawnfile run runs compile again to derive current runtime wiring, then starts the selected image with ports, env, auth material, and workspace resources.
• spawnfile up is the local one-command path. It builds the image and then runs it with the same auth and env options as run.

Managed Moltnet SQLite/JSON stores and open-registration agent token directories appear in the compile report as container.persistent_mounts[]. spawnfile run and spawnfile up mount those entries as Docker named volumes so messages, registrations, and generated open-mode agent tokens survive container replacement.

You can also pass an env file directly at run time:

spawnfile run ./agents/episode-worker --env-file ./ops/secrets/episode-worker.env

This writes the provided values into Spawnfile’s generated Docker env file for that run. When both an auth profile and --env-file provide the same variable, the env file value wins; if the same variable is set in the shell environment, the shell value wins.

Project-Specific Tools

The generated image contains the compiled organization and runtime support. If an agent needs extra project tools, build a small overlay image on top of the generated image instead of editing the generated Dockerfile:

ARG BASE_IMAGE=my-team:spawnfile
FROM ${BASE_IMAGE}

USER root
RUN apt-get update \
  && apt-get install -y --no-install-recommends gh python3-pip \
  && rm -rf /var/lib/apt/lists/*
USER spawnfile

spawnfile build . --tag my-team:spawnfile
docker build -f ops/docker/agent-tools.Dockerfile \
  --build-arg BASE_IMAGE=my-team:spawnfile \
  -t my-team:tools .
spawnfile run . --tag my-team:tools --auth-profile dev

Keep credentials out of the overlay image. Declare required tokens as environment.secrets: or shared.environment.secrets:, then provide them with spawnfile auth sync --env-file ... or spawnfile run --env-file ....

Runtime Inputs

Spawnfile supports the common runtime inputs directly in the manifest:

Runtime need	Spawnfile declaration
Repository checkout	workspace.resources with kind: git and a workspace-relative mount
Shared scratch directory	shared.workspace.resources with kind: volume and sharing: team
Per-agent state or cron data	workspace.resources with kind: volume and default sharing: per_agent
Required tokens	environment.secrets: or shared.environment.secrets: plus auth sync or run --env-file
Model CLI credentials	execution.model.*.auth.method plus an auth profile
Extra operating system packages	Overlay image based on the generated image

Resource mounts are symlink-backed inside the runtime workspace. Use workspace-relative mounts such as ./repos/product, ./state, and ./cron so each agent sees stable paths without depending on runtime-internal directories.

Manual Docker

Manual Docker remains valid against the compile output:

spawnfile compile fixtures/single-agent --out ./bundle/single-agent
cd ./bundle/single-agent
docker build -t my-agent .
cp .env.example .env
# Fill in secret values...
docker run --env-file .env -p 18789:18789 my-agent

If the compile report includes container.persistent_mounts[], add matching -v <volume_name>:<mount_path> arguments to manual docker run commands.

Compile Report Container Section

The compile report includes a container section:

{
  "container": {
    "runtimes_installed": ["openclaw", "picoclaw"],
    "dockerfile": "Dockerfile",
    "entrypoint": "entrypoint.sh",
    "env_example": ".env.example",
    "secrets_required": ["SEARCH_API_KEY", "ANTHROPIC_API_KEY"],
    "ports": [3000]
  }
}

What Container Compilation Does Not Cover

These are out of scope for v0.1:

• Docker Compose generation for multi-container topologies
• Orchestration (Kubernetes, ECS, Fly, etc.)
• Image publishing and registry
• Runtime-native auth bootstrap (onboarding flows stay manual)
• HEALTHCHECK instructions or readiness contracts
• Volume management and persistence strategy
• Network topology between containers
• CI/CD integration