# Optimization Mode Router > Choose fast direct-to-cuOpt solve versus replayable or auditable model artifact mode. - Skill: `nvidia/optimization-mode-router` (Agent Skill) - Install (CLI): `npx skillmds@latest add nvidia/optimization-mode-router` - Raw SKILL.md: https://api.skillmd.com/api/skills/nvidia/optimization-mode-router/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - License: Apache-2.0 - Author: NVIDIA (https://skillmd.com/u/nvidia) - Updated: 2026-09-10 - Page: https://skillmd.com/skills/nvidia/optimization-mode-router --- # Optimization Mode Router Use this skill when a user asks a question that may be answered by solving an optimization problem from uploaded or provided data, and you need to decide whether to: - proceed with a **fast direct-to-cuOpt solve**, or - offer a **replayable/auditable path** that preserves a structured model artifact for later reruns, review, export, or audit. This skill is about **mode selection**, not full formulation. Its purpose is to keep the common path fast while surfacing stronger reproducibility only when it is actually useful. ## Read this when Read this skill when all of the following are true: 1. The user appears to be asking a question that could become an LP, MILP, QP, or routing problem. 2. The user has provided data, or is expected to provide data. 3. You need to decide whether to: - go straight to a direct cuOpt solve, or - preserve a replayable/auditable artifact as part of the workflow. ## Do not use this skill for - Pure formulation work after the execution mode has already been chosen. - Pure cuOpt API usage when the user has already clearly chosen fast vs replayable mode. - Non-optimization analytics questions. ## Default behavior - Default to **Fast mode**. - Default to **direct cuOpt solve** for one-off requests from uploaded CSVs (schedule, assignment, allocation, routing) — proceed to `cuopt-model-mapper` without asking fast vs replayable unless the user signals audit/export/rerun. - Do **not** ask about replayability/auditability unless there is a real signal that it matters. - Avoid turning a straightforward optimization request into a heavy upfront questionnaire. - **NemoClaw sandbox:** Fast mode means cuOpt after `cuopt-sandbox` gates — never a custom greedy/heuristic builder as the solve path. ## Two modes ### Fast mode Use Fast mode when the user appears to want the quickest route to an answer. Behavior: - inspect the provided data - identify whether the request is LP, MILP, QP, or routing - ask only the minimum necessary clarifying questions - build the model directly in cuOpt - solve and explain the result - do not preserve a replayable model artifact unless requested ### Replayable / Auditable mode Use this mode when the user wants reuse, traceability, or formal review. Behavior: - capture explicit assumptions - record data-to-model mappings - preserve a structured model specification or equivalent reusable artifact - solve with cuOpt - return both the answer and reusable/reviewable model metadata ## When to ask the mode-selection question Ask the user to choose between Fast mode and Replayable/Auditable mode if any of the following are true: 1. The user explicitly asks for any of these: - save the model - rerun on new data - replay later - recurring or scheduled runs - audit trail - export the model - document assumptions - review the formulation - show how the data maps into the model 2. The request appears operational or recurring rather than one-off: - daily / weekly / monthly planning - production workflow - repeated scenario analysis - future datasets are expected 3. The user indicates a need for traceability or justification: - compliance - internal or external review - reproducibility - explicit explanation of assumptions or mappings ## When not to ask Do **not** ask the mode-selection question when the request is clearly: - one-off - exploratory - ad hoc - speed-oriented In those cases, proceed in **Fast mode** unless the user later asks for replayability, audit, export, or model persistence. ## Recommended user-facing phrasing Preferred short form: **Should I treat this as a one-off solve, or make it replayable/auditable too?** Alternative longer form: **I can do this in two ways: Fast mode for the quickest answer, or Replayable mode that also keeps a structured spec for reruns, audit, and reuse. Which do you want?** ## Decision rule - If there is **no meaningful signal** for replayability/auditability → use **Fast mode** silently. - If there **is** a meaningful signal → ask the mode-selection clarifier early. - If the user chooses replayable/auditable mode → preserve the structured artifact and proceed. - If the user chooses fast mode → proceed directly to cuOpt. ## Handoff guidance After selecting a mode, hand off based on problem type: - If the request is LP / MILP: - use `numerical-optimization-formulation` - then use `cuopt-numerical-optimization-api-python` (or `cuopt-numerical-optimization-api-cli` for MPS inputs) - in sandbox contexts, follow `cuopt-sandbox` (gates + selected gRPC path) before any LP/MILP solve - If the request is QP: - use `numerical-optimization-formulation` - then use `cuopt-numerical-optimization-api-python` - in sandbox contexts, follow `cuopt-sandbox` (gates + selected gRPC path) before any QP solve - If the request is routing (VRP / TSP / PDP): - use `routing-formulation` - then use `cuopt-routing-api-python` - in sandbox contexts, follow `cuopt-sandbox` (gates + REST) before any routing solve - If the user is asking about server usage or deployment rather than solving a model directly: - use `cuopt-server-common` or `cuopt-server-api-python` as appropriate - In all cuOpt user tasks: - follow `cuopt-user-rules` ## Operational notes - This skill is about **execution mode selection**, not full mathematical modeling. - Keep the user experience lightweight by default. - Prefer direct-to-cuOpt for one-off work. - Use replayable/auditable mode only when the user’s needs justify the extra structure.