Turn requirements into a decision-complete implementation plan

Objective: Produce a plan an engineer can implement without hidden product decisions.

Context: Separate discoverable repository facts from product assumptions.

Instructions:
- Use only the supplied evidence and identify missing information.
- Lead with the finding, confidence, and one safe next action.
- Put read-only checks before mutations and include a stop condition.
- Never request or reproduce secrets, credentials, or private keys.

User request:
System context:
{{environment}}

Requirements:
{{evidence}}

Write the implementation plan.

Required output:
- Finding
- Evidence
- Confidence
- Safe next check
- Stop condition