simulate
Run what-if scenarios to explore outcomes and test hypotheses. Use when evaluating alternatives, stress-testing designs, exploring edge cases, or predicting system behavior under different conditions.
npx skills add majiayu000/claude-skill-registry --skill simulate --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
## Intent Execute mental simulations of scenarios to explore outcomes without making real changes. This capability enables safe exploration of "what-if" questions and helps identify risks before action. **Success criteria:** - Scenario executed through logical steps - Multiple outcomes considered - Key decision points identified - Assumptions made explicit **Compatible schemas:** - `schemas/output_schema.yaml` ## Inputs | Parameter | Required | Type | Description | |-----------|----------|------|-------------| | `scenario` | Yes | object | Scenario to simulate (intervention, change, event) | | `initial_state` | No | object | Starting state for simulation | | `steps` | No | integer | Number of simulation steps/iterations | | `explore` | No | string | What to explore: single_path, branches, exhaustive | ## Procedure 1) **Set up scenario**: Define what is being simulated - Clarify the intervention or change being tested - Establish initial conditions - Define simulation boundaries 2) **Initialize state**: Establish starting point - Use provided initial_state or current system state - Validate state is consistent - Note any simplifications 3) **Execute simulation**: Step through scenar
- Intent
- Inputs
- Procedure
- Output Contract
- Field Definitions
- Examples
- Example 1: Simulate Dependency Upgrade
- Example 2: Simulate Failure Scenario
- Verification
- Safety Constraints
- Composition Patterns
What does the simulate skill do?
Run what-if scenarios to explore outcomes and test hypotheses. Use when evaluating alternatives, stress-testing designs, exploring edge cases, or predicting system behavior under different conditions.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill simulate --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.