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vibe-scenario-matrix

Generates a behavioral scenario acceptance matrix for comprehensive test coverage planning. Maps user scenarios to acceptance criteria with stable IDs. Use when planning test coverage for a complex feature, before a release or milestone review, or when someone asks what is tested.

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vibe-scenario-matrix

Test coverage isn't about code lines -- it's about user scenarios. Map them all.

When to Use This Skill

  • Planning test coverage for a complex feature
  • Preparing for a release or milestone review
  • After expanding requirements significantly
  • When stakeholders ask "what's tested?"
  • Transitioning from ad-hoc testing to systematic testing

When NOT to Use This Skill

  • Single-function unit testing (just write the test)
  • Already have comprehensive test specifications
  • Prototyping/spiking (too early for formal coverage)

Steps

  1. Gather scenarios from:

    • PRD / Requirements document
    • User stories / acceptance criteria
    • Bug reports (past failures = scenarios to test)
    • User feedback / support tickets
    • Edge cases discovered during development
  2. Assign stable IDs -- Use format [Section]-[Number]:

    • Example: AUTH-001, PAYMENT-015, ONBOARD-003
    • IDs never change once assigned (even if scenario text changes)
  3. Classify testing approach:

    • Deterministic (61%): Can be tested with standard assertions
    • LLM-as-Judge (24%): Needs qualitative assessment
    • Simulation (11%): Needs multi-step environment
    • Proxy Metric (4%): Can only be measured indirectly
  4. Build the matrix:

IDScenarioExpected BehaviorTest ApproachStatus
AUTH-001User logs in with valid credentialsRedirect to dashboard, session createdDeterministicPASS
AUTH-002User enters wrong password 5 timesAccount locked for 30 minutesDeterministicNOT_IMPL
TONE-001System responds empathetically to frustrationResponse acknowledges emotion without dismissingLLM-as-JudgePARTIAL
  1. Track status: PASS / PARTIAL / FAIL / NOT_IMPLEMENTED / DEFERRED

Output Format

Scenario Acceptance Matrix: [Feature/Product]

Total Scenarios: X Coverage: Y% (PASS or PARTIAL)

StatusCount%
PASSXX%
PARTIALXX%
NOT_IMPLEMENTEDXX%
DEFERREDXX%

By Testing Approach

ApproachCountTooling Needed
DeterministicXStandard test framework
LLM-as-JudgeXEvaluation framework
SimulationXEnvironment setup
Proxy MetricXMetrics pipeline

Full Matrix

[Table as above]

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