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Infrastructure as Code · ancoleman | DecimalAI

devopsby ancoleman

Infrastructure as Code

ancoleman/writing-infrastructure-code

Source ancoleman/ai-design-components ↗License MIT

Managing cloud infrastructure using declarative and imperative IaC tools.

SkillScore96Maintained

Automatic

DevOps & SRE pack

Last verified 8/21/2026

What it changes

Passed 22 of 23 test cases with the skill, and 20 of 23 without it.

Without skill87%

With skill96%

Checks it passed that the model alone missed

Advises against direct manual editing of the remote state file.
Identifies the threshold of 3 or more reuses as the criterion for module creation.

2 fixed20 passed either way1 still failing0 broke

Pass-rate lift: +9 pp
Tokens: +185%
Agent turns: 0%
Response time: +1%

Model gemini-3.6-flashMeasured 8/21/2026v122 of 23 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/ancoleman-writing-infrastructure-code/SKILL.md https://app.decimal.ai/s/ancoleman-writing-infrastructure-code/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add ancoleman-writing-infrastructure-code, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/ancoleman-writing-infrastructure-code/ and pins it in .decimal/skills.lock

decimalai skills add ancoleman-writing-infrastructure-code

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/ancoleman-writing-infrastructure-code/SKILL.md https://app.decimal.ai/s/ancoleman-writing-infrastructure-code/SKILL.md

Raw file: /s/ancoleman-writing-infrastructure-code/SKILL.md ↗ · machine-readable summary at /s/ancoleman-writing-infrastructure-code.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 2

Prompt

An engineer wants to extract every single cloud resource created in our stack into a dedicated reusable Terraform module repository, including a one-off organizational IAM baseline resource created once per cloud account. Should we extract a custom module for this single resource or keep it inline, and what threshold justifies creating reusable modules?

What was checked, without and with the skill
Checked	Without skill	With skill
Advises keeping one-off infrastructure inline rather than extracting a module.	Passed	Passed
Identifies the threshold of 3 or more reuses as the criterion for module creation.	Missed	Passed

case-05 · gemini-3.6-flash · 8/21/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md480 lines8 filesincludes scripts

Infrastructure as Code

Provision and manage cloud infrastructure using code-based automation tools. This skill covers tool selection, state management, module design, and operational patterns across Terraform/OpenTofu, Pulumi, and AWS CDK.

When to Use

Use this skill when:

Provisioning cloud infrastructure (compute, networking, databases, storage)
Migrating from manual infrastructure to code-based workflows
Designing reusable infrastructure modules
Implementing multi-cloud or hybrid-cloud deployments
Establishing state management and drift detection patterns
Integrating infrastructure provisioning into CI/CD pipelines
Evaluating IaC tools (Terraform vs Pulumi vs CDK)

Common requests:

"Create a Terraform module for VPC provisioning"
"Set up remote state with locking for team collaboration"
"Compare Pulumi vs Terraform for our use case"
"Design composable infrastructure modules"
"Implement drift detection for existing infrastructure"

Core Concepts

Infrastructure as Code Fundamentals

Key Principles:

Declarative vs Imperative - Describe desired state (Terraform) or program infrastructure (Pulumi)
Idempotency - Same input produces same output, safe to re-run
Version Control - Infrastructure changes tracked in Git
State Management - Track actual infrastructure state
Module Composition - Reusable, versioned infrastructure components

Benefits:

Reproducibility (same code = same infrastructure)
Auditability (Git history shows all changes)
Collaboration (code reviews for infrastructure changes)
Automation (CI/CD deploys infrastructure)
Disaster recovery (rebuild from code)

Track record

Benchmark

22 / 23

test cases passed, vs 20 / 23 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

ancoleman / ai-design-components

skills/writing-infrastructure-code/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 7 files · scripts

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Ready to supercharge your AI agents?

See it in action

What's inside

Infrastructure as Code

When to Use

Core Concepts

Infrastructure as Code Fundamentals

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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