yet-another-agent-harness: Skill for Claude Code

.claude/skills/cloudformation-to-pulumi/SKILL.md

cloudformation-to-pulumi is a skill for Claude Code, Codex from dirien/yet-another-agent-harness. It costs 38 tokens per session (2,290 once invoked), scanned A, a copy of cloudformation-to-pulumi, MIT.

A migration guide for converting AWS CloudFormation templates or stacks into Pulumi programs. CloudFormation is AWS's infrastructure-definition format, while Pulumi describes infrastructure with programming languages.

In plain words
What is it for?
Use it when moving AWS infrastructure from CloudFormation to Pulumi, including resource coverage checks, preview validation, and existing-resource imports.
Why use it?
It helps preserve every declared resource and its logical identifier while producing a Pulumi program that can be previewed and, where needed, imported without unintended differences.

Skill for Claude CodeCodex

Written for Claude Code and Codex: installed under .claude/, but also agents/openai.yaml present.

This is dirien/yet-another-agent-harness's own configuration. It tells Claude Code and Codex how to work on yet-another-agent-harness itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything yet-another-agent-harness configures →

Reuse

Borrowing it

Nothing to install: this file belongs to dirien/yet-another-agent-harness. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/dirien/yet-another-agent-harness/main/.claude/skills/cloudformation-to-pulumi/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/dirien/yet-another-agent-harness

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cloudformation-to-pulumi

README.md
[![agentmods](https://agentmods.dev/badge/skills/dirien/yet-another-agent-harness/cloudformation-to-pulumi/github.svg)](https://agentmods.dev/skills/dirien/yet-another-agent-harness/cloudformation-to-pulumi)
Your own site
<a href="https://agentmods.dev/skills/dirien/yet-another-agent-harness/cloudformation-to-pulumi"><img src="https://agentmods.dev/badge/skills/dirien/yet-another-agent-harness/cloudformation-to-pulumi/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

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Your own site · 80×15
<a href="https://agentmods.dev/skills/dirien/yet-another-agent-harness/cloudformation-to-pulumi"><img src="https://agentmods.dev/badge/skills/dirien/yet-another-agent-harness/cloudformation-to-pulumi.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,290 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 91% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00038 $0.02290
Opus 5 $0.00019 $0.01145
Sonnet 5 $0.00008 $0.00458
Haiku 4.5 $0.00004 $0.00229

Measured 11d ago against content hash dd67ea961fa4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

cloudformation-to-pulumi scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

91% identical to cloudformation-to-pulumi — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/cloudformation-to-pulumi/SKILL.md · 296 lines

How it starts

The opening of the file, as written. The whole thing — 296 lines — stays where its author put it; the contents beside it link to each section on GitHub.

IMPORTANT: PLAN ADJUSTMENT REQUIRED

If you have already generated a migration plan before loading this skill, you MUST:

  1. Review your existing plan against the workflows and requirements in this skill
  2. Identify any gaps, missing steps, or incorrect assumptions
  3. Update and revise your plan to align with this skill's guidance
  4. Communicate the adjusted plan to the user before proceeding

CRITICAL SUCCESS REQUIREMENTS

The migration output MUST meet all of the following:

  1. Complete Resource Coverage

    • Every CloudFormation resource MUST be represented in the Pulumi program OR explicitly justified in the final report.
  2. CloudFormation Logical ID as Resource Name

    • CRITICAL: Every Pulumi resource MUST use the CloudFormation Logical ID as its resource name.
    • This enables the cdk-importer tool to automatically find import IDs.
    • DO NOT rename resources. Automated import will FAIL if you change the logical IDs.
  3. Successful Deployment

    • The produced Pulumi program must be structurally valid and capable of a successful pulumi preview (assuming proper config).
  4. Zero-Diff Import Validation (if importing existing resources)

    • After import, pulumi preview must show NO updates, replaces, creates, or deletes.
  5. Final Migration Report

    • Always output a formal migration report suitable for a Pull Request.

WHEN INFORMATION IS MISSING

If the user has not provided a CloudFormation template, you MUST fetch it from AWS using the stack name.

MIGRATION WORKFLOW

Follow this workflow exactly and in this order:

1. INFORMATION GATHERING

1.1 Verify AWS Credentials (ESC)

Running AWS commands requires credentials loaded via Pulumi ESC.

  • If the user has already provided an ESC environment, use it.
  • If no ESC environment is specified, ask the user which ESC environment to use before proceeding.

For detailed ESC information: Use skill pulumi-esc.

You MUST confirm the AWS region with the user.

Read the full file on GitHub · 296 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 296 lines · 38 tokens per session scan A dd67ea961fa4

Subscribe to this mod's changes

cloudformation-to-pulumi is a skill published in the GitHub repository dirien/yet-another-agent-harness (20 stars, last pushed 3mo ago), licensed MIT. It adds 38 tokens to every session and 2,290 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 91% identical to cloudformation-to-pulumi, differing in 2 lines, and is treated as a copy.

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