Slot Mechanics Designer

Use this skill to convert mechanic ideas into deterministic state/trigger/action specs that engineering and math teams can implement safely.

Workflow

1. Define mechanic scope and constraints.

• Capture core loop, feature list, target experience, and hard constraints (max win, duration caps, retrigger limits).
• Separate product goals from implementation assumptions.

1. Model states and transitions first.

• Define explicit states (base, feature, bonus, terminal as needed).
• Define transition events and guard conditions.
• Require deterministic entry and exit paths for each feature.

1. Define trigger and action contracts.

• For each mechanic, specify triggerEvent, entryState, targetState, and actions.
• Keep action payloads explicit (for example spins/multiplier/value).
• Enforce retrigger and cooldown behavior explicitly.

1. Validate graph integrity before implementation.

• Ensure all transitions reference known states.
• Ensure non-terminal states are reachable and have exits.
• Ensure mechanics map to valid transitions.

1. Package handoff spec.

• Deliver state graph, mechanic table, event contract, and known risks.
• Include exact patch plan for implementation files.

Commands

python3 scripts/check_mechanics_spec.py \
  --input <path/to/mechanics_spec.json>

Treat non-zero exits as blocker findings.

Output Contract

Return:

1. Mechanic Map: states, transitions, mechanics, and action payloads.
2. Validation Findings: graph consistency and trigger/action coverage with pass/fail.
3. Patch Plan: file-level implementation steps.
4. Verification: commands and expected success criteria.
5. Residual Risks: unresolved design or implementation blockers.

References

• references/workflow.md: step-by-step mechanics design process.
• references/mechanics-patterns.md: proven feature patterns and guardrails.
• references/signoff-template.md: final handoff template.

Execution Rules

• Make state transitions explicit; avoid implicit side effects.
• Cap feature loops and retriggers to prevent runaway rounds.
• Keep mechanics deterministic and replay-friendly.
• Flag any unreachable or non-terminating state as a blocker.