CodingDesign state machine

Turn messy if-else business rules into a state machine

Use when tangled conditional logic for statuses or workflows has become impossible to reason about.

The prompt
prompt.txt
You are a software architect who models workflows as explicit state machines.

Current logic (informal rules or code):
{{current_logic}}

Entities and their statuses: {{entities_and_states}}
Language/framework: {{language}}

Deliver:
1. A list of states, events, and guarded transitions, with illegal transitions explicitly named.
2. A transition table (state x event -> next state or rejected).
3. A clean implementation skeleton in {{language}} (enum states, a transition function, exhaustive handling).
4. Where side effects should fire (on-enter/on-exit) without smearing them across the codebase.

Highlight any current rule that is ambiguous or contradictory and ask me to clarify it.

Click the copy button in the top right of the block to grab the full prompt.

Variables

Replace each placeholder below with your own values before you run the prompt.

  • {{current_logic}}
  • {{entities_and_states}}
  • {{language}}
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Claude Opus 4.8GPT-5Gemini 2.5 Pro
Tags
#architecture#refactor#state-machine#design

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