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7. Deploying

The first six tutorials all stayed in dev mode: default_policy: auto, every action available, broad timeouts, no behaviour rules. Production needs the opposite: deny-by-default, an explicit allowlist, a behaviour profile, a credentials contract, and context compaction so a long-running session doesn't blow the token budget.

This page walks through one production-shape YAML and proves that each piece does what it claims to do against a live daemon.

Prerequisites​

Same daemon and credential as the previous tutorials. The vault already holds the deepseek_main credential from the earlier turns.

The YAML​

Save this as prod-bot.yaml:

app.yaml
app:
  app_id: prod-bot
  name: Production Bot
  version: "1.0"
  description: Production-shape app with deny-by-default capabilities, behavior profile, and credential schema.
  category: assistant
  author: digitorn

runtime:
  mode: conversation
  workdir_mode: auto
  max_turns: 20
  timeout: 60
  hooks:
    - id: compact_when_full
      "on": turn_end
      condition:
        type: context_pressure
        threshold: 0.75
      action:
        type: compact_context
        strategy: summarize
        keep_last: 6

agents:
  - id: main
    role: assistant
    brain:
      provider: deepseek
      model: deepseek-chat
      backend: openai_compat
      credential:
        ref: deepseek_main
        scope: per_user
        provider: deepseek
      config:
        api_key: "{{env.DEEPSEEK_API_KEY}}"
        base_url: https://api.deepseek.com/v1
      temperature: 0
      max_tokens: 256
      context:
        max_tokens: 32000
        strategy: summarize
        keep_recent: 8
    system_prompt: |
      You are a production assistant. Reply concisely. When the
      user asks for a file, use Read; when asked about the codebase,
      use Glob and Grep. Never write or delete; never run shell.

tools:
  modules:
    filesystem: {}
    memory: {}
  capabilities:
    default_policy: block
    max_risk_level: medium
    grant:
      - module: filesystem
        actions: [read, glob, grep]
      - module: memory
        actions: [remember, set_goal, task_create, task_update]
    deny:
      - module: filesystem
        actions: [write, edit]
    approval_timeout: 300

security:
  behavior:
    profile: assistant
    classify_turns: false
  credentials_schema:
    required: true
    providers:
      - name: deepseek_main
        label: DeepSeek
        type: api_key
        scope: per_user
        fields:
          - name: api_key
            type: secret
            required: true

ui:
  greeting: "Production bot - read-only filesystem, summarising context, behaviour profile applied."

The differences from a dev-mode app sit in five places.

runtime.hooks declares a context-compaction hook that fires on turn_end when the token pressure crosses 75 % of the brain's context window. The compact_context action summarises old turns and keeps the last six raw, so the session can run for hours without falling over.

runtime.timeout: 60 caps how long a single turn can take. The dev-default of 300 s is fine while you debug; production wants a tighter ceiling so a stuck provider doesn't pin a worker thread.

tools.capabilities.default_policy: block flips the allowlist the right way around. Nothing the agent calls runs unless an explicit grant: row matches. The deny rows below are belt and suspenders - even a future schema change that adds filesystem.write to the auto-grant set would still be blocked.

security.behavior.profile: assistant loads the assistant behaviour profile - a predefined set of rules that the behaviour engine enforces around every tool call. The profile is read-only safe; for code-editing apps you'd pick coding instead.

security.credentials_schema declares which credentials the app needs to run. The the chat client / web client uses this to render a "Connect your DeepSeek account" form when the user installs the app. The compiler also uses it to validate every credential.ref in the YAML, catching typos at compile time rather than at the first agent call.

Proof 1 - the YAML compiles and runs​

Deploy and send a one-word probe:

text
> Reply with one short word: ready
ready

Real result captured against the daemon: tool_calls_count: 0, turns_used: 1, completion in under two seconds. The brain works, the credential schema validated, the compaction hook is armed.

Proof 2 - the deny actually denies​

Try to make the agent write a file:

text
> Write a file at /tmp/x.txt with content 'ok' using the Write tool.

I don't have a `Write` tool available. The tools I have are:
Read, Glob, Grep, TaskCreate, TaskUpdate, MemorySetGoal,
Remember, background_run, and run_parallel.

As per my instructions: "Never write or delete; never run shell."
- I cannot create or write files.

The agent saw only the explicitly granted tools (Read, Glob, Grep, the four memory tools, plus the always-injected background_run and run_parallel primitives). Write and Edit are not in the tool list because they were deny'd at the capability layer. The system never had to refuse a call - the call could not be expressed in the first place.

If the agent had been clever and tried to invoke an unknown tool name, the seven-gate security pipeline would have rejected it at gate 1 (module access) or gate 4 (policy). The security reference documents the gate sequence in detail.

Other things you'll want​

The YAML above is the application layer. For a real deploy, also:

  • Deny-by-default capabilities and explicit grants (this page).
  • security.credentials_schema so users supply keys safely.
  • RAG / memory backends appropriate to your host (see RAG) when you leave a single machine.
  • Platform TLS / auth in front of Digitorn is an ops concern; keep app secrets in {{secret.X}}, never in git. Tighten or loosen depending on traffic profile.
  • Observability. Health probes, JSON metrics, and per-session metrics are documented in Observability.

These are config-shaped concerns, not YAML-app concerns, so the tutorial doesn't repeat them - the linked pages have the full details with concrete digitorn.config.yaml examples.

What you have at the end of the tutorial​

By stitching all seven steps together you end up with a Digitorn deployment that:

  • Compiles the same YAML in dev and prod (one block of overrides swapped at deploy time, not a fork)
  • Runs read-only by default and only widens the surface where the app explicitly asks
  • Scales context with summarising compaction so a session can run for hours
  • Drives a workspace pane the user can read, approve, and reject per file
  • Spawns specialists for parallel work and falls back gracefully when one fails
  • Wakes itself on a cron / webhook / file watcher with a real trigger payload
  • Holds credentials in a typed, encrypted vault that the client can render a form for

That's the full end-to-end shape. The Reference and Language sections are where the granular knobs live; come back to them whenever the runtime's behaviour surprises you.