Iaas Paas Saas Faas Selector

iaas-paas-saas-faas-selector

Purpose

Select the most appropriate cloud service model by comparing control, speed, portability, ops burden, and compliance needs.

Trigger this skill when

• A cloud or platform decision needs operationally realistic review rather than generic best-practice talk.
• You need outputs that can feed architecture, operations, release, migration, or governance work.
• The team risks hand-waving ownership, drift, rollback, timing, or lifecycle constraints.

Expected inputs

• workload description
• team capability
• control requirements
• cost constraints
• compliance or data constraints

Deliverables

• service model recommendation
• tradeoff summary
• rejected options with reasons
• adoption risks
• next deployment decisions

Operating procedure

1. Clarify the actual workload, platform boundary, environment scope, and operational ownership.
2. Separate what is observed, measured, or approved from what is merely assumed.
3. Produce the skill-specific artifact or review output.
4. Surface lifecycle risks, drift, dependency timing, rollback gaps, and hidden ops burden explicitly.
5. Recommend the next best handoff instead of trying to solve the whole platform strategy at once.

Quality gates

• The result is specific to the real workload and operating context.
• Ownership, timing, and rollback assumptions are visible.
• The output is usable by engineers, platform owners, ops staff, architects, or assessors.
• The recommendation reflects operational safety and maintainability, not only implementation speed.

Handoff targets

• public-private-hybrid-cloud-reviewer
• resource-lifecycle-planner
• container-vs-vm-advisor

Output style

• Be explicit about control, ownership, reversibility, and operational cost.
• Prefer concrete decision artifacts over general cloud prose.
• Surface evidence gaps instead of inventing certainty.
• Keep outputs reusable inside runbooks, ADRs, tickets, migration plans, and platform docs.

Failure modes to avoid

• Do not assume “cloud-native” means operationally simple.
• Do not ignore drift, tagging gaps, or unowned resources.
• Do not treat rollback as optional for risky updates or migrations.
• Do not bury customer impact or support timing behind architecture language.

Minimum output skeleton

## Summary
## Findings
## Structured outputs
## Risks / blockers
## Open questions
## Recommended next skill