cloudposse/atmos
Jan 2025 – Apr 2026
12 Months active
Languages Used
GoHCLMakefileMarkdownShellYAMLCSSbash
Technical Skills
Backend DevelopmentCI/CDCI/CD Pipeline ConfigurationCLI DevelopmentConfiguration ManagementDevOps
Dan Miller
PROFILE
Dan Miller
Daniel Miller engineered robust backend and DevOps features for the cloudposse/atmos repository, focusing on workflow automation, API integration, and secure cloud infrastructure management. Over twelve months, he delivered enhancements such as centralized AWS root access, dependency-free stack processing, and secure data serialization for instance uploads. Using Go, YAML, and Terraform, Daniel improved error handling, authentication, and CI/CD reliability, while reducing deployment friction and data leakage risks. His technical approach emphasized modular test infrastructure, real-time status reporting, and payload optimization, resulting in scalable, maintainable pipelines. The work demonstrated depth in backend development and infrastructure as code, addressing operational reliability.
Overall Statistics
Feature vs Bugs
85%Features
Repository Contributions
30Total
Bugs
4
Commits
30
Features
23
Lines of code
15,544
Activity Months12
Work History
April 2026
1 Commits • 1 Features
Apr 1, 2026In April 2026, delivered a security-first upgrade to Atmos Pro's instance upload flow for cloudposse/atmos. The changes introduce an allowlist DTO and payload-stripping to ensure only essential data (component, stack, component_type, settings) is transmitted, eliminating exposure of secrets and reducing JSON marshaling errors. Fixed nested YAML map marshaling issues (map[interface{}]interface{}) during list instances --upload and preserved drift-detection configuration by retaining settings.pro in the stripped payload. Added tests validating payload isolation (src→result). Result: a more secure, reliable, and maintainable Atmos Pro integration, enabling safer automated deployments and easier security/compliance audits.
1 Commits • 1 Features
Apr 1, 2026In April 2026, delivered a security-first upgrade to Atmos Pro's instance upload flow for cloudposse/atmos. The changes introduce an allowlist DTO and payload-stripping to ensure only essential data (component, stack, component_type, settings) is transmitted, eliminating exposure of secrets and reducing JSON marshaling errors. Fixed nested YAML map marshaling issues (map[interface{}]interface{}) during list instances --upload and preserved drift-detection configuration by retaining settings.pro in the stripped payload. Added tests validating payload isolation (src→result). Result: a more secure, reliable, and maintainable Atmos Pro integration, enabling safer automated deployments and easier security/compliance audits.
April 2026
March 2026
5 Commits • 3 Features
Mar 1, 2026March 2026 (cloudposse/atmos) achieved meaningful business value through feature delivery that reduces setup friction, enhances visibility, and improves reliability when managing large stacks and environments. Delivered dependency-free stack processing, enhanced real-time status visibility for Atmos Pro, chunked upload support for large repositories with preserved metadata, and robust handling of deleted components in describe-affected, resulting in smoother CI/CD pipelines and more predictable deployments. Highlights: - Dependency-free Stack Processing: Disable YAML function processing in list instances to remove the need for external binaries like tofu/terraform, simplifying stack processing and removing PATH/setup friction. - Atmos CLI Real-time Status Reporting to Atmos Pro: Send raw instance status (command, exit code) from Atmos CLI to Atmos Pro with configurable CI exit code mapping, enabling real-time visibility of plan/apply results in CI workflows. - Upload Processing Enhancements: Preserve deletion metadata during upload strip and enable chunked uploads for large stack payloads to avoid HTTP 413 errors, with configurability of max payload and batch metadata. - Robust Handling of Deleted Components in Describe Affected: Fix crash by skipping dependent resolution for deleted components, improving reliability of impact analysis. Business value: - Faster onboarding and reduced setup costs due to dependency-free processing. - Real-time feedback in CI/CD improves deployment confidence and reduces debugging time. - Ability to manage large repositories without errors leads to more scalable pipelines. - More stable describe-affected behavior improves change impact analysis and risk assessment. Technologies/skills demonstrated: - Go and CLI integration, API payload design, and config-driven features (e.g., upload-status flag, CI mapping) - Concurrency safeguards and testability (mutex guards for chunked upload tests) - Documentation and developer experience improvements (blogs, roadmap entries, tests)
March 2026
5 Commits • 3 Features
Mar 1, 2026March 2026 (cloudposse/atmos) achieved meaningful business value through feature delivery that reduces setup friction, enhances visibility, and improves reliability when managing large stacks and environments. Delivered dependency-free stack processing, enhanced real-time status visibility for Atmos Pro, chunked upload support for large repositories with preserved metadata, and robust handling of deleted components in describe-affected, resulting in smoother CI/CD pipelines and more predictable deployments. Highlights: - Dependency-free Stack Processing: Disable YAML function processing in list instances to remove the need for external binaries like tofu/terraform, simplifying stack processing and removing PATH/setup friction. - Atmos CLI Real-time Status Reporting to Atmos Pro: Send raw instance status (command, exit code) from Atmos CLI to Atmos Pro with configurable CI exit code mapping, enabling real-time visibility of plan/apply results in CI workflows. - Upload Processing Enhancements: Preserve deletion metadata during upload strip and enable chunked uploads for large stack payloads to avoid HTTP 413 errors, with configurability of max payload and batch metadata. - Robust Handling of Deleted Components in Describe Affected: Fix crash by skipping dependent resolution for deleted components, improving reliability of impact analysis. Business value: - Faster onboarding and reduced setup costs due to dependency-free processing. - Real-time feedback in CI/CD improves deployment confidence and reduces debugging time. - Ability to manage large repositories without errors leads to more scalable pipelines. - More stable describe-affected behavior improves change impact analysis and risk assessment. Technologies/skills demonstrated: - Go and CLI integration, API payload design, and config-driven features (e.g., upload-status flag, CI mapping) - Concurrency safeguards and testability (mutex guards for chunked upload tests) - Documentation and developer experience improvements (blogs, roadmap entries, tests)
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for cloudposse/atmos: Delivered payload size optimization for the Atmos describe affected --upload workflow, improving performance and serverless compatibility. The feature reduces payloads by stripping unused fields, enabling reliable uploads under serverless function limits and lowering data transfer overhead. Change implemented in a single commit with automated fixes and PRD alignment. No major defects fixed this month; the focus was feature delivery and code quality improvements.
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for cloudposse/atmos: Delivered payload size optimization for the Atmos describe affected --upload workflow, improving performance and serverless compatibility. The feature reduces payloads by stripping unused fields, enabling reliable uploads under serverless function limits and lowering data transfer overhead. Change implemented in a single commit with automated fixes and PRD alignment. No major defects fixed this month; the focus was feature delivery and code quality improvements.
February 2026
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 – CloudPosse Atmos: Delivered centralized AWS root access management via aws/assume-root identity kind, enabling a single permission set for privileged operations across accounts. Implemented identity kind registration, 12-digit AWS account ID validation, coverage for all five AWS-managed root task policies, credential lifecycle management, and identity chaining. Introduced a shared STS client helper to reduce duplication. Documentation and tests updated to support governance and onboarding. This work reduces risk, improves auditability, and accelerates safe root-level task execution at scale.
December 2025
1 Commits • 1 Features
Dec 1, 2025December 2025 – CloudPosse Atmos: Delivered centralized AWS root access management via aws/assume-root identity kind, enabling a single permission set for privileged operations across accounts. Implemented identity kind registration, 12-digit AWS account ID validation, coverage for all five AWS-managed root task policies, credential lifecycle management, and identity chaining. Introduced a shared STS client helper to reduce duplication. Documentation and tests updated to support governance and onboarding. This work reduces risk, improves auditability, and accelerates safe root-level task execution at scale.
October 2025
1 Commits
Oct 1, 2025October 2025: Delivered Atmos Pro API endpoint improvement for Atmos by switching the Instances API to accept query parameters for stack and component, addressing issues with slash-containing names and enhancing overall compatibility. Implemented via chore: Update Pro Instances API (#1721); changelog updated; co-authored contributions by Andriy Knysh and aknysh. Impact: reduces integration errors, enables smoother Atmos Pro automation, and lays groundwork for future API enhancements. Technologies: API design, GitHub collaboration, changelog management.
1 Commits
Oct 1, 2025October 2025: Delivered Atmos Pro API endpoint improvement for Atmos by switching the Instances API to accept query parameters for stack and component, addressing issues with slash-containing names and enhancing overall compatibility. Implemented via chore: Update Pro Instances API (#1721); changelog updated; co-authored contributions by Andriy Knysh and aknysh. Impact: reduces integration errors, enables smoother Atmos Pro automation, and lays groundwork for future API enhancements. Technologies: API design, GitHub collaboration, changelog management.
October 2025
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for cloudposse/atmos. Delivered two key capabilities and improved documentation quality, enhancing operational visibility and reliability. Features include Atmos List Instances and Pro integration enhancements, with robust error handling and updated configurations, plus fixes to documentation workflow references to ensure accurate GitHub Actions examples. These changes drive better instance management, drift monitoring, and smoother Pro API data flows.
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for cloudposse/atmos. Delivered two key capabilities and improved documentation quality, enhancing operational visibility and reliability. Features include Atmos List Instances and Pro integration enhancements, with robust error handling and updated configurations, plus fixes to documentation workflow references to ensure accurate GitHub Actions examples. These changes drive better instance management, drift monitoring, and smoother Pro API data flows.
August 2025
1 Commits
Aug 1, 2025August 2025 monthly summary for cloudposse/atmos. Focused on enhancing workflow error reporting by standardizing file path formatting and ensuring paths are relative to the base workflow directory. Added a regression test to verify improved error reporting, improving reliability of CI workflow failure diagnostics and reducing debugging time.
1 Commits
Aug 1, 2025August 2025 monthly summary for cloudposse/atmos. Focused on enhancing workflow error reporting by standardizing file path formatting and ensuring paths are relative to the base workflow directory. Added a regression test to verify improved error reporting, improving reliability of CI workflow failure diagnostics and reducing debugging time.
August 2025
July 2025
1 Commits • 1 Features
Jul 1, 2025In July 2025, focused on enhancing workflow error reporting in cloudposse/atmos. Delivered stack-name context in error messages for workflow failures to improve debugging and triage efficiency. Implemented automated tests to verify the enhanced error reporting and prevent regressions. The change is tracked under DEV-3480 and linked to PR #1372. Overall, this work reduces MTTR for workflow issues and increases reliability of orchestration pipelines.
July 2025
1 Commits • 1 Features
Jul 1, 2025In July 2025, focused on enhancing workflow error reporting in cloudposse/atmos. Delivered stack-name context in error messages for workflow failures to improve debugging and triage efficiency. Implemented automated tests to verify the enhanced error reporting and prevent regressions. The change is tracked under DEV-3480 and linked to PR #1372. Overall, this work reduces MTTR for workflow issues and increases reliability of orchestration pipelines.
June 2025
4 Commits • 3 Features
Jun 1, 2025June 2025 focused on delivering reliable, scalable Atmos CLI and CI/CD workflows for cloudposse/atmos. Delivered three main features with improved error handling, authentication, and release automation; added OIDC-based Atmos Pro authentication, enhanced workflow execution, and screengrabs/feature-branch releases with cross-OS builds. No major bugs fixed reported; reliability and developer experience improved through logging, test coverage, and clearer error messages. These changes collectively reduce deployment friction, enable GitHub Actions integration, and shorten feedback loops while expanding release capabilities.
4 Commits • 3 Features
Jun 1, 2025June 2025 focused on delivering reliable, scalable Atmos CLI and CI/CD workflows for cloudposse/atmos. Delivered three main features with improved error handling, authentication, and release automation; added OIDC-based Atmos Pro authentication, enhanced workflow execution, and screengrabs/feature-branch releases with cross-OS builds. No major bugs fixed reported; reliability and developer experience improved through logging, test coverage, and clearer error messages. These changes collectively reduce deployment friction, enable GitHub Actions integration, and shorten feedback loops while expanding release capabilities.
June 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 — CloudPosse Atmos: Enhanced README generation for atmos describe config imports with Terraform-aware options, resulting in more accurate docs and smoother Terraform integration. Implemented new inputs, templates, and options (source, format, input/output display) and updated snapshots to reflect changes.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 — CloudPosse Atmos: Enhanced README generation for atmos describe config imports with Terraform-aware options, resulting in more accurate docs and smoother Terraform integration. Implemented new inputs, templates, and options (source, format, input/output display) and updated snapshots to reflect changes.
April 2025
5 Commits • 5 Features
Apr 1, 2025April 2025 — Cloud POSSE Atmos: Delivered five user- and developer-facing enhancements focused on reliability, observability, and developer experience. No major bugs were recorded in this period for Atmos; instead, we implemented warnings, CI noise reduction, test infra modernization, and improved documentation to guide users and maintainers.
5 Commits • 5 Features
Apr 1, 2025April 2025 — Cloud POSSE Atmos: Delivered five user- and developer-facing enhancements focused on reliability, observability, and developer experience. No major bugs were recorded in this period for Atmos; instead, we implemented warnings, CI noise reduction, test infra modernization, and improved documentation to guide users and maintainers.
April 2025
January 2025
7 Commits • 6 Features
Jan 1, 2025January 2025 delivered foundational improvements to Atmos that enhance maintainability, safety, and developer experience. The team reorganized test infrastructure, modularized tests, introduced a component locking mechanism to block destructive actions, improved Terraform environment variable handling with precedence merging and conflict warnings, and added support for relative path imports with refactored path resolution. These changes reduce production risk, improve CI reliability, and enable faster iteration across Terraform and Helmfile configurations, while improving UX for terraform output in non-TTY environments.
January 2025
7 Commits • 6 Features
Jan 1, 2025January 2025 delivered foundational improvements to Atmos that enhance maintainability, safety, and developer experience. The team reorganized test infrastructure, modularized tests, introduced a component locking mechanism to block destructive actions, improved Terraform environment variable handling with precedence merging and conflict warnings, and added support for relative path imports with refactored path resolution. These changes reduce production risk, improve CI reliability, and enable faster iteration across Terraform and Helmfile configurations, while improving UX for terraform output in non-TTY environments.
Activity
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Quality Metrics
Correctness94.0%
Maintainability88.4%
Architecture90.0%
Performance85.0%
AI Usage30.0%
Skills & Technologies
Programming Languages
CSSGoHCLMakefileMarkdownShellYAMLbashmakefileyaml
Technical Skills
API DevelopmentAPI IntegrationAPI developmentAWSAuthenticationBackend DevelopmentCI/CDCI/CD Pipeline ConfigurationCI/CD integrationCLICLI DevelopmentCloud InfrastructureConfiguration ManagementContent ManagementDevOps
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline