Individual skill
model-migration-plan
Plan the migration of an LLM feature from one model to another without breaking production. Use when a model is being deprecated, a newer model looks better or cheaper, or when asked how to upgrade models safely, run shadow traffic, or set rollback criteria for a model change. Produces a phased migration plan with eval gates, shadow/canary stages, prompt-adaptation notes, and rollback triggers. For choosing which model in the first place use model-selection-advisor.
skills/model-migration-plan/SKILL.md
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# Model Migration Plan Skill
A model swap changes every output of your feature at once. This skill plans the migration like the risky deploy it is: eval first, shadow second, canary third — with numbers, not vibes, deciding each promotion.
## What This Skill Produces
- A **phased migration plan** (eval → shadow → canary → full) with promotion criteria per phase
- **Prompt adaptation notes** — what typically shifts between models and what to re-tune
- **Rollback triggers** and the mechanics of rolling back fast
- A **cost/latency delta forecast** for the new model
## Required Inputs
Ask for (if not already provided):