How to Use Roblox Planning Mode Before Letting Assistant Touch a Large Game
Use Planning Mode as a pre-edit review layer: give Assistant the target behavior, project constraints, and relevant systems; make it inspect the code and data model, ask clarifying questions, and produce an editable task plan before any changes run.
Use Planning Mode as a pre-edit review layer: give Assistant the target behavior, project constraints, and relevant systems; make it inspect the code and data model, ask clarifying questions, and produce an editable task plan before any changes run.
Planning Mode is valuable because one-shot editing is the wrong default
Roblox says the improved Planning Mode is designed for multistep game work: Assistant can analyze code and the data model, ask clarifying questions, and turn a complex request into a detailed, reviewable, editable plan. For a large game, use that as a gate before the agent touches production state.
Put constraints into the plan, not only the opening prompt
- Systems that are already correct and must stay unchanged.
- DataStore or network interfaces that must remain compatible.
- Performance budgets or device constraints.
- Required tests and playtest scenarios.
- Tasks that need human approval before execution.
Review dependencies before parallel work
Roblox describes plans as task manifests that agents can use for parallel execution. Parallelize only independent tasks. If UI reads a data schema that another task is changing, those tasks are not independent even if they live in different files.
The approved plan becomes the reference for verification
Do not let the plan disappear after implementation starts. When playtesting or reviewing diffs, compare the result to the original goal and constraints. If the work drifted, revise the plan rather than adding ad-hoc patches on top of an unclear state.
Working template
GOAL: [...] CONSTRAINTS: [...] PROTECTED SYSTEMS: [...] REQUIRED TESTS: [...] PLAN FIRST: inspect code + data model, ask clarifying questions, produce ordered tasks with dependencies. Do not execute until the plan is reviewed.
Source and verification note
This guide was checked against Roblox: Studio is Going Agentic and Roblox Creator Hub: AI on Roblox and updated Sep 5, 2026. Product behavior can change; current primary documentation should take precedence over this guide.