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aws-lambda-managed-instances

Evaluates, configures, and migrates workloads to AWS Lambda Managed Instances (LMI). Runs Lambda functions on EC2 instances in the user's account while AWS manages provisioning, patching, scaling, routing, and load balancing. Triggers when queries mention Lambda Managed Instances, LMI, capacity providers, multi-concurrent execution environments, EC2-backed Lambda, persistent Lambda instances, PerExecutionEnvironmentMaxConcurrency, CapacityProviderConfig, cold start elimination via dedicated instances, migrating standard Lambda to managed instances, or cost comparison between standard Lambda and LMI with Savings Plans or Reserved Instances.

68

Quality

84%

Does it follow best practices?

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SKILL.md
Quality
Evals
Security

Quality

Content

68%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.

The body is a well-structured, actionable overview that effectively uses decision tables and concrete config parameters while delegating detail to six reference files. The main weaknesses are a missing rollback feedback loop in the destructive cutover workflow and an unlinked bundled asset.

Suggestions

Add an explicit validation/rollback checkpoint in Step 6: define the CloudWatch thresholds (e.g., throttle rate > 1%, error rate > X%) that trigger a rollback to the weighted alias before shifting to 100%.

Link the bundled asset from the body (e.g., reference assets/sqs-processor/template.yaml under Migration or Infrastructure) so the example template is discoverable rather than orphaned.

Consolidate the duplicated guidance between the Quick Decision table and Workflow Step 1 signals (traffic, cost, runtime, concurrency readiness) to tighten token usage.

DimensionReasoningScore

Conciseness

Dense, decision-oriented content with no padding of basic concepts, but some repetition between the Quick Decision table, Workflow signals, and Best Practices sections could be consolidated.

4 / 5

Actionability

Provides concrete, specific config values (memory bounds, per-runtime concurrency caps, Architectures: [arm64], MaxVCpuCount default 400) and decision tables; minor gap is the absence of inline copy-paste code beyond an external template link.

4 / 5

Workflow Clarity

The 6-step workflow is clearly sequenced with some validation in the cutover step, but this is a batch/destructive operation (decommissioning standard Lambda) without an explicit rollback/feedback-loop checkpoint, which caps this dimension at 3 per the rubric guideline.

3 / 5

Progressive Disclosure

Clear overview with six one-level-deep reference files signaled via routing and Files tables (all files verified to exist); the assets/sqs-processor/template.yaml asset is present but never linked from the body, a minor organization gap.

4 / 5

Total

15

/

20

Passed

Description

100%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.

The description is exemplary: it concisely states concrete capabilities, uses third-person voice, and provides a rich, explicit trigger clause covering natural synonyms and technical identifiers. It clearly answers both what the skill does and when to invoke it.

DimensionReasoningScore

Specificity

Lists multiple concrete actions (Evaluates, configures, migrates workloads) plus detailed managed-service responsibilities (provisioning, patching, scaling, routing, load balancing), giving comprehensive coverage of the LMI domain.

5 / 5

Completeness

Explicitly answers both 'what' (evaluates/configures/migrates workloads to LMI; runs Lambda on EC2 with AWS managing ops) and 'when' via an explicit 'Triggers when queries mention...' clause with concrete trigger phrases.

5 / 5

Trigger Term Quality

Comprehensive coverage of natural and technical terms including the LMI acronym, capacity providers, PerExecutionEnvironmentMaxConcurrency, CapacityProviderConfig, cold start elimination, and Savings Plans/Reserved Instances.

5 / 5

Distinctiveness Conflict Risk

Targets a distinct AWS product (LMI) with niche-specific triggers tied to unique API fields and pricing constructs, giving minimal overlap risk with general Lambda skills.

5 / 5

Total

20

/

20

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

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
Reviewed

Table of Contents

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