# Shaft Assertions

> Use when selecting or repairing SHAFT hard assertions, soft verifications, browser or element oracles, API checks, object checks, or failure messages.

- Skill: `shafthq/shaft-assertions` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add shafthq/shaft-assertions`
- Raw SKILL.md: https://api.skillmd.com/api/skills/shafthq/shaft-assertions/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: shafthq (https://skillmd.com/u/shafthq)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/shafthq/shaft-assertions

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# SHAFT Assertions

Start with [SHAFT Developer](../shaft-developer/SKILL.md), then read and follow
[the assertions playbook](references/playbook.md).