feat(templates): add global ignore_missing_template_values to atmos.yaml

[Copilot]

• Add IgnoreMissingTemplateValues field to TemplatesSettings struct in pkg/schema/schema.go
• Use global setting as fallback in ProcessYAMLConfigFiles (top-level file call) in stack_processor_utils.go
• Use global setting as fallback when processing imports via importStruct.IgnoreMissingTemplateValues in stack_processor_utils.go
• Use global setting in validate_stacks.go calls
• Add test TestGlobalIgnoreMissingTemplateValues to verify the feature works
• Update documentation in templates.mdx and imports.mdx
• Add blog post announcement at website/blog/2026-03-09-global-ignore-missing-template-values.mdx
• Update roadmap dx initiative with new shipped milestone
• Fix macOS ARM64 test failures (gomonkey SIGBUS): DI refactor for processTerraformComponent, runtime skips for other gomonkey tests
• Fix website build error: removed blank line inside <dd> tag in imports.mdx that caused MDX parsing to fail

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Global ignore_missing_template_values option for imported catalogs</issue_title>
<issue_description>### Describe the Feature

Upgrading from atmos 1.168.0 to latest version, the ignore_missing_template_values  (link) seems to be the method found. It would be nice to set this at a global level instead of on every imported catalog otherwise we have to update 100s of catalogs and references.

e.g. instead of this

import:
  - path: "<path_to_atmos_manifest2>"
    context: {}
    skip_templates_processing: false
    ignore_missing_template_values: true

maybe this in atmos.yaml or similar

settings:
  ignore_missing_template_values: true

Expected Behavior

See above

Use Case

See above

Describe Ideal Solution

See above

Alternatives Considered

No response

Additional Context

• Slack thread https://sweetops.slack.com/archives/C031919U8A0/p1773077869220799</issue_description>

<agent_instructions>Think deeply. Use PR template. Use semantic commits. Use semantic PR title. Consider the problem and the proposal and see if it makes sense. It's possible that the global config be in a different yaml location. Please consider different options and select the optimum solution for developer/agent/user experience. Be surgical. </agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Global ignore_missing_template_values option for imported catalogs #2157

---

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[github-actions]

Warning

Release Documentation Required

This PR is labeled minor or major and requires documentation updates:

• Changelog entry - Add a blog post in website/blog/YYYY-MM-DD-feature-name.mdx
• Roadmap update - Update website/src/data/roadmap.js with the new milestone

Alternatively: If this change doesn't require release documentation, remove the minor or major label.

[github-actions]

Warning

Release Documentation Required

This PR is labeled minor or major and requires documentation updates:

• Changelog entry - Add a blog post in website/blog/YYYY-MM-DD-feature-name.mdx
• Roadmap update - Update website/src/data/roadmap.js with the new milestone

Alternatively: If this change doesn't require release documentation, remove the minor or major label.

[github-actions]

Warning

Release Documentation Required

This PR is labeled minor or major and requires documentation updates:

• Changelog entry - Add a blog post in website/blog/YYYY-MM-DD-feature-name.mdx
• Roadmap update - Update website/src/data/roadmap.js with the new milestone

Alternatively: If this change doesn't require release documentation, remove the minor or major label.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues found.

Scanned Files

None

[github-actions]

Warning

Release Documentation Required

This PR is labeled minor or major and requires documentation updates:

• Changelog entry - Add a blog post in website/blog/YYYY-MM-DD-feature-name.mdx
• Roadmap update - Update website/src/data/roadmap.js with the new milestone

Alternatively: If this change doesn't require release documentation, remove the minor or major label.

[osterman]

@copilot please add a minor blog post announcement since this is a new feature and update the roadmap.

[Copilot]

@copilot please add a minor blog post announcement since this is a new feature and update the roadmap.

Done in eaff6a7. Added a blog post at website/blog/2026-03-09-global-ignore-missing-template-values.mdx covering the feature, usage, and the difference from skip_templates_processing. Also added a shipped milestone to the dx initiative in the roadmap.

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• https://api.github.com/repos/cloudposse/atmos
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/atmos/atmos/website/node_modules/.bin/docusaurus build (http block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/atmos/atmos/website/node_modules/.bin/docusaurus build git tag me b80e94650044bc97f15da0670d692ae1b3268111 /usr/bin/git bsite/docs/cli/c/bin/sh (http block)
• https://api.github.com/repos/cloudposse/atmos/releases/latest
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/atmos/atmos/website/node_modules/.bin/docusaurus build (http block)
  • Triggering command: /home/REDACTED/work/_temp/ghcca-node/node/bin/node node /home/REDACTED/work/atmos/atmos/website/node_modules/.bin/docusaurus build git tag me b80e94650044bc97f15da0670d692ae1b3268111 /usr/bin/git bsite/docs/cli/c/bin/sh (http block)

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[nitrocode]

@copilot fix these broken tests on macos https://github.com/cloudposse/atmos/actions/runs/22870303258/job/66349063827

[Copilot]

@copilot fix these broken tests on macos https://github.com/cloudposse/atmos/actions/runs/22870303258/job/66349063827

Fixed in c18a651. The root cause was TestProcessTerraformComponent calling gomonkey.ApplyFunc which panics with an unrecoverable SIGBUS on macOS ARM64 (Apple Silicon) because code pages are read-only.

Fix:

• Refactored processTerraformComponent to accept executeFn func(schema.ConfigAndStacksInfo) error as a parameter (dependency injection), removing the need for gomonkey entirely in TestProcessTerraformComponent. All 8 subtests now pass directly using lightweight mock functions.
• Added runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" skip guards to TestExecuteTerraformAffectedComponentInDepOrder and BenchmarkExecuteTerraformAffectedComponentInDepOrder, which still rely on gomonkey for the recursive executeTerraformAffectedComponentInDepOrder function.
• Updated the single production caller in terraform_query.go to pass ExecuteTerraform explicitly.

[nitrocode]

@copilot fix the website test errors on https://github.com/cloudposse/atmos/actions/runs/22872481528/job/66365125259?pr=2158

[Copilot]

@copilot fix the website test errors on https://github.com/cloudposse/atmos/actions/runs/22872481528/job/66365125259?pr=2158

Fixed in 1909391. The MDX compiler was failing because I had added a blank line inside a <dd> tag in imports.mdx — MDX treats blank lines as paragraph separators, so it hit the end of the paragraph before finding the </dd> closing tag. Merged the two sentences into a single paragraph (no blank line) to resolve the parse error.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.15%. Comparing base (b132ba7) to head (1909391).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2158   +/-   ##
=======================================
  Coverage   77.15%   77.15%           
=======================================
  Files         942      942           
  Lines       89502    89502           
=======================================
+ Hits        69051    69054    +3     
+ Misses      16394    16389    -5     
- Partials     4057     4059    +2     

Flag	Coverage Δ
unittests	77.15% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
internal/exec/stack_processor_utils.go	81.16% <100.00%> (ø)
internal/exec/terraform_query.go	79.62% <100.00%> (ø)
internal/exec/terraform_utils.go	73.88% <100.00%> (ø)
internal/exec/validate_stacks.go	82.66% <100.00%> (ø)
pkg/schema/schema.go	87.70% <ø> (ø)

... and 4 files with indirect coverage changes

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