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The devhelm.yml file defines your entire monitoring configuration. Deploy it with devhelm deploy -f devhelm.yml.

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Minimal example

version: "1"

monitors:
  - name: API Health
    type: HTTP
    config:
      url: https://api.example.com/health
    frequency: 60
    regions: [us-east]

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Top-level structure

version: "1"

defaults:
  monitors:
    frequency: 60
    enabled: true
    regions: [us-east, eu-west]

tags:
  - ...

environments:
  - ...

secrets:
  - ...

alertChannels:
  - ...

notificationPolicies:
  - ...

webhooks:
  - ...

resourceGroups:
  - ...

monitors:
  - ...

dependencies:
  - ...
All section keys are camelCase. Every section is optional — include only what you need.

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version

version: "1"
The schema version. Currently "1" is the only supported value. The CLI warns on unrecognized versions but does not reject them.

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defaults

Set default values that apply to all monitors unless overridden: 
defaults:
  monitors:
    frequency: 60
    enabled: true
    regions: [us-east, eu-west]
    alertChannels: [Slack Alerts]
    incidentPolicy:
      confirmation:
        type: multi_region
        minRegionsFailing: 2
Defaults are applied with shallow per-field merge: if a monitor sets a field, the monitor value wins. Nested objects like incidentPolicy are replaced entirely, not deep-merged.

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Resource sections

Each section is detailed on its own page:
SectionKeyReference byDocs
TagstagsnameTags & Secrets
EnvironmentsenvironmentsslugTags & Secrets
SecretssecretskeyTags & Secrets
Alert ChannelsalertChannelsnameAlert Channels
Notification PoliciesnotificationPoliciesnameNotification Policies
WebhookswebhooksurlTags & Secrets
Resource GroupsresourceGroupsnameMonitors
MonitorsmonitorsnameMonitors
Dependenciesdependenciesservice slugTags & Secrets

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Cross-references

Resources reference each other by name (or slug), not by ID. The CLI resolves names to IDs at deploy time: 
monitors:
  - name: API Health
    tags: [production]            # references tag by name
    alertChannels: [Slack Alerts] # references alert channel by name
    environment: staging          # references environment by slug
    auth:
      type: BearerAuthConfig
      secret: API_TOKEN           # references secret by key

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Environment variable interpolation

Use ${VAR} syntax to inject environment variables into any string value: 
alertChannels:
  - name: Slack Alerts
    type: slack
    config:
      webhookUrl: ${SLACK_WEBHOOK_URL}
With a default fallback: 
monitors:
  - name: API Health
    type: HTTP
    config:
      url: ${API_URL:-https://api.example.com/health}
Environment variables are resolved before YAML parsing. If a required variable is missing, the CLI exits with an error listing all unresolved variables.
Environment variable interpolation (${VAR}) is different from vault secrets. Variables are resolved from the shell environment at deploy time. Vault secrets are stored in DevHelm and referenced by key in auth blocks.

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Multi-file configs

Pass multiple files with -f: 
devhelm deploy -f base.yml -f overrides.yml --yes
Or point to a directory (all *.yml and *.yaml files are loaded in sorted order): 
devhelm deploy -f config/ --yes
Resources from all files are merged by name. If the same monitor name appears in multiple files, the last file wins.

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Full example

version: "1"

defaults:
  monitors:
    frequency: 60
    regions: [us-east, eu-west]

tags:
  - name: production
    color: "#10b981"
  - name: api
    color: "#3b82f6"

environments:
  - name: Production
    slug: production
    variables:
      BASE_URL: https://api.example.com

secrets:
  - key: SLACK_WEBHOOK_URL
    value: ${SLACK_WEBHOOK_URL}

alertChannels:
  - name: Slack Alerts
    type: slack
    config:
      webhookUrl: ${SLACK_WEBHOOK_URL}

  - name: PagerDuty On-Call
    type: pagerduty
    config:
      routingKey: ${PAGERDUTY_ROUTING_KEY}

notificationPolicies:
  - name: Critical Alerts
    enabled: true
    priority: 10
    matchRules:
      - type: tag
        values: [production]
    escalation:
      steps:
        - channels: [Slack Alerts]
          delayMinutes: 0
        - channels: [PagerDuty On-Call]
          delayMinutes: 5
          requireAck: true

monitors:
  - name: API Health
    type: HTTP
    config:
      url: https://api.example.com/health
      method: GET
    tags: [production, api]
    alertChannels: [Slack Alerts]
    assertions:
      - type: StatusCodeAssertion
        config:
          expected: "200"
          operator: equals
        severity: fail

dependencies:
  - service: github
    alertSensitivity: INCIDENTS_ONLY

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Next steps

Monitors in YAML

All monitor types, assertions, and incident policies.

Deploy workflow

Validate, plan, and deploy lifecycle.