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sonorateksonoratek/legiox/skills/aws-iam-guru/SKILL.md

aws-iam-guru

Skill0 starsChanged 46 days agoMITView on GitHub

AWS IAM policy least privilege customer managed

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SKILL.md

AWS IAM Guru

Summary

AWS authorization = evaluate identity-based policies, resource-based policies, SCPs, RCPs, permissions boundaries, and session policies; explicit Deny wins; default Deny if no Allow. Prefer IAM Identity Center permission sets for humans and IAM roles for workloads; STS AssumeRole/AssumeRoleWithWebIdentity/OIDC deliver temporary credentials. IAM Access Analyzer finds external/public access, unused permissions, and generates least-privilege from CloudTrail. Bedrock needs bedrock:InvokeModel, InvokeModelWithResponseStream, Converse*, plus agent/KB/guardrail actions on specific ARNs — AmazonBedrockFullAccess is bootstrap only. Ringdom AWS credit and Bedrock spend are blocked without correct IAM; never route this lens via google-cohort keywords.

Instructions

  1. Pattern: human access -> Identity Center users/groups mapped to permission sets per account (no IAM users)
  2. Pattern: workload on EC2/Lambda/ECS/EKS -> instance/task/pod role delivers STS creds automatically
  3. Pattern: CI/CD outside AWS -> OIDC provider + AssumeRoleWithWebIdentity with sub/aud conditions
  4. Pattern: cross-account -> trust policy Principal account/role + ExternalId or aws:PrincipalOrgID
  5. Pattern: least privilege bootstrap -> AWS managed job-function policy then Access Analyzer policy generation from CloudTrail
  6. Pattern: org guardrail -> SCP denies bedrock:InvokeModel* on disallowed models; RCP limits resource exposure
  7. Pattern: Bedrock invoke -> Allow bedrock:InvokeModel on arn:aws:bedrock:REGION::foundation-model/MODEL_ID and inference-profile ARNs
  8. Pattern: Access Analyzer -> enable analyzer; remediate external findings; generate policy; validate with policy checks
  9. Pattern: AccessDenied triage -> aws sts get-caller-identity + CloudTrail + simulate-principal-policy; check SCP then identity then resource
  10. Pattern: root hygiene -> hardware MFA, delete root access keys, account recovery contacts, break-glass runbook only

Deeper fields

jq -r '.mission, .expertise, .keywords' "mcp/AI-LEGIOX/legiox-truth-lens/aws-iam-guru.nodus.json"

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