creating-ec2-image-builder-pipeline

Creates a complete EC2 Image Builder pipeline that builds a custom AMI with pre-installed software, distributes it to target regions, executes the pipeline, and creates a launch template. Use when setting up automated AMI creation with IAM roles, build components, image recipes, and infrastructure configuration.

Quality

89%

Does it follow best practices?

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Securityby

Low

Low-risk findings worth noting

Quality

Content

86%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

An efficiently structured skill body that follows progressive disclosure well, with a real reference file holding the detailed procedure and actionable troubleshooting inline. Minor gaps are that the primary executable workflow lives in the reference rather than the body.

Dimension	Reasoning	Score
Conciseness	Lean overview with no concept over-explanation; delegates the bulk procedure with 'follow the procedure exactly' and keeps troubleshooting terse and specific (exact ARN format, 'Wait 10–15 seconds').	5 / 5
Actionability	Troubleshooting gives concrete, executable fixes (exact ARN pattern, timing guidance), but the core creation steps are delegated to the reference rather than carried inline, leaving a minor gap.	4 / 5
Workflow Clarity	The body cleanly delegates to a reference whose procedure is sequenced with validation checkpoints ('verify successful completion of each step', confirm-on-failure), though the sequencing itself lives in the reference, not the body.	4 / 5
Progressive Disclosure	Concise overview body pointing to a single well-signaled, one-level-deep reference (references/ec2-image-builder-pipeline.md, verified to exist) that holds the detailed procedure — ideal structure.	5 / 5
	Total	18 / 20 Passed

Description

92%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A highly specific, well-triggered description that clearly conveys both capability and invocation context with minimal conflict risk. The only minor gap is synonym coverage in trigger terms.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete actions — 'builds a custom AMI with pre-installed software, distributes it to target regions, executes the pipeline, and creates a launch template' — covering the full lifecycle comprehensively.	5 / 5
Completeness	Explicitly states what it does (full pipeline build/distribute/execute/launch template) and when to use it ('Use when setting up automated AMI creation with IAM roles, build components, image recipes, and infrastructure configuration').	5 / 5
Trigger Term Quality	Strong natural AWS terms ('EC2 Image Builder', 'custom AMI', 'automated AMI creation', 'IAM roles, build components, image recipes') that users would say, but lacks synonyms/variants beyond the core vocabulary.	4 / 5
Distinctiveness Conflict Risk	Targets a specific AWS service niche (EC2 Image Builder pipelines) with distinct triggers, making overlap with other skills minimal.	5 / 5
	Total	19 / 20 Passed

Validation

93%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
frontmatter_unknown_keys	Unknown frontmatter key(s) found; consider removing or moving to metadata	Warning

	Total	15 / 16 Passed

Repository: aws/agent-toolkit-for-aws
Path: skills/specialized-skills/ec2-skills/creating-ec2-image-builder-pipeline/SKILL.md
Commit: d6ad2e4

Reviewed: 3 days ago

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