# Probitas Write > Writing Probitas scenarios. MUST BE USED when writing/editing E2E tests, creating scenarios, or working with *.probitas.ts files. Use when this capability is needed. - Skill: `tomevault-io/probitas-write` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/probitas-write` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/probitas-write/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/probitas-write --- ## Instructions **ALWAYS delegate to the scenario-writer agent using the Task tool.** **CRITICAL - Language:** - ALWAYS translate user requirements to English before invoking the agent - Provide clear, concise English prompts for optimal agent performance **Steps:** 1. Translate user requirements to English 2. Invoke Task tool with `subagent_type: "probitas:scenario-writer"` 3. Provide English prompt with test requirements **Example:** User asks: "ユーザー認証APIのテストを書いて" Your response: ``` I'll use the probitas:scenario-writer agent to write this Probitas test scenario. ``` Then invoke Task tool: - `subagent_type`: "probitas:scenario-writer" - `prompt`: "Write an E2E test for the user authentication API that: - Tests login with valid credentials (should succeed) - Tests login with invalid credentials (should fail with appropriate error)" - `description`: "Write auth test scenario" ## Workflow 1. If no `probitas.jsonc` → run `/probitas:probitas-init` first 2. Invoke `probitas:scenario-writer` agent with English prompt 3. Agent will use `/probitas:probitas-expect-methods InterfaceName` to find correct expect methods before writing assertions 4. After completion → run `/probitas:probitas-check` to verify 5. If needed → run `/probitas:probitas-run` to test **Note:** All coding rules and assertion guidelines are defined in the scenario-writer agent itself. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/probitas-test) — claim your Tome and manage your conversions.