# Technique Selector

> Use this skill when Codex needs to choose the best black-box test design technique for a requirement, user story, rule set, workflow, or state model before generating tests.

- Skill: `jovd83/technique-selector` (Agent Skill)
- Install (CLI): `npx skillmds@latest add jovd83/technique-selector`
- Raw SKILL.md: https://api.skillmd.com/api/skills/jovd83/technique-selector/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: jovd83 (https://skillmd.com/u/jovd83)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/jovd83/technique-selector

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# Technique Selector

Select the best-fit technique. Do not generate the final test cases here.

## Read First

- `./references/technique-selection-matrix.md`
- `./references/test-design-shared-conventions.md`

## Decision Process

1. Identify the dominant problem shape:
   - ordered ranges or limits
   - equivalence classes
   - discrete rules and outcomes
   - interacting parameters
   - states and transitions
   - actor-system flows
   - acceptance criteria at behavior level
2. Check whether the user already mandated a technique.
3. If the scenario is too vague to distinguish between two plausible techniques, ask a focused clarification question instead of guessing.
4. Prefer the technique that best matches the main defect risk, not the technique that produces the largest number of tests.

## Required Output

Return a compact recommendation with exactly these sections:

- `Primary technique`
- `Why it fits`
- `Secondary option`
- `Why not the others`
- `Missing information`, only if the analysis is blocked or materially uncertain

## Guardrails

- Recommend one primary technique.
- Name a secondary option only when it is genuinely plausible.
- If the artifact mixes several shapes, choose the one that should drive the first pass and mention any residual gap briefly.
- Do not produce tables, test steps, or detailed scenarios in this skill.