Atmos Imports

Use this skill for stack manifest import: behavior, especially remote imports. Imports pull stack configuration, not component source code.

Related Skills

Need	Load
General stack structure and merge precedence	atmos-stacks
Component source provisioning and vendoring	atmos-vendoring
Private GitHub auth with Atmos Pro STS	atmos-auth
Migration from old import/name patterns	atmos-modernization

Import Basics

import:
  - catalog/vpc/defaults
  - mixins/region/us-east-2
  - orgs/acme/plat/prod/_defaults

Atmos resolves imports before producing the final stack. Use imports for _defaults.yaml, mixins, catalog defaults, reusable stack fragments, and remote stack configuration.

If both file.yaml and file.yaml.tmpl exist, the template version is preferred. Template imports can receive context and render before merge.

Remote Imports

Remote imports use the same stack import: key:

import:
  - https://raw.githubusercontent.com/acme/config/main/stacks/catalog/vpc.yaml
  - github://acme/config/main/stacks/catalog/eks.yaml
  - git::https://github.com/acme/config.git//stacks/catalog/db.yaml?ref=v1.2.3
  - s3::https://s3.amazonaws.com/acme-configs/stacks/catalog/vpc.yaml
  - gcs::gs://acme-configs/stacks/catalog/eks.yaml
  - oci://ghcr.io/acme/atmos-config:v1.2.3

Use pinned refs or immutable artifact tags for production imports. Prefer HTTPS/GitHub forms for read-only public config and Git/OCI forms when versioning, auth, or packaged artifacts matter.

Import vs Source vs Vendoring

import: pulls stack YAML configuration.
Component source: provisions component source code.
vendor.yaml plus atmos vendor pull materializes external files into the repository.

Remote imports do not create components/terraform/<name> directories. If a remote imported stack references a component whose source is not local, also configure component source: or vendor the component with atmos vendor pull.

Use atmos vendor pull to cache important remote imports/components locally for offline access, repeatability, and faster CI.

Private GitHub Imports

For private GitHub remote imports in CI, prefer Atmos Pro github/sts:

auth:
  providers:
    atmos-pro:
      kind: atmos/pro
      spec:
        workspace_id: !env ATMOS_PRO_WORKSPACE_ID
  identities:
    atmos-pro:
      kind: atmos/pro
      via:
        provider: atmos-pro
  integrations:
    github-sts:
      kind: github/sts
      via:
        provider: atmos-pro
      spec:
        auto_provision: true

In CI, github/sts can lazily mint GitHub tokens before the first private remote read, including atmos vendor pull, component source:, remote import:, and private Terraform module fetches.

Debugging

Use atmos describe stacks --stack <stack> to verify imported and merged output.
Use atmos validate stacks before relying on generated stack names or inherited component config.
If a remote import works but Terraform cannot find a component, check component source/vendoring.
If a private import fails in CI, check id-token: write, atmos/pro, github/sts, and repository trust policy in Atmos Pro.

SKILL.md