# Jev Act > Choose one legal next action in a browser, desktop, game or simulation. Supply fresh observed state and available actions. The host or simulator executes and checks the result; selection does not grant permission. - Skill: `wuyoscar/jev-act` (Agent Skill, multi-file: 6 files) - Install (CLI): `npx skillmds@latest add wuyoscar/jev-act` - Raw SKILL.md: https://api.skillmd.com/api/skills/wuyoscar/jev-act/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: wuyoscar (https://skillmd.com/u/wuyoscar) - Updated: 2026-09-22 - Page: https://skillmd.com/skills/wuyoscar/jev-act --- # Choose the next action ## Use safely Choose the service once and keep that choice. If unset, ask **A: real Jev** via OpenRouter (`OPENROUTER_API_KEY`) or TypeSafe (`TYPESAFE_API_KEY`), or **B: simulation** with this agent or an explicitly chosen available model such as DeepSeek. Wait for consent; errors do not authorize switching. Check key presence only, never values. Real calls send evidence and cost money; get approval before sending private data. For B, skip CLI/API calls. Mark `agent_simulation` or `model_simulation`, identify the actual model when available, set `jev_called: false`, `probability: null` and `confidence: null`. Return a value, evidence-based reason and `needs_review`; use null/review when evidence is missing. Do not invent Jev output or probabilities. Choice uses supplied labels, Noul uses booleans, Score uses integer rubric indices. For A, use the existing `jev-decide` CLI with the chosen `--provider openrouter` or `--provider typesafe`. If absent, explain the dependency; do not silently install. `--dry-run` is offline validation, not a judgment. Exit 0 means selected/scored, 2 means review, 1 means error. Read each value: false Noul remains false. Selection is not permission, and confidence is not accuracy. Keep unknown/review paths. ## First request Adapt [the example](assets/example.json). The shared CLI needs Python 3.10+; no sibling skill is needed. Host tools still own collection and actions. Resolve `` to this installed folder: ```bash jev-decide decide /assets/example.json --dry-run # After approval, send the edited request with the selected provider: jev-decide decide /path/to/request.json --provider openrouter ``` ## Pick one mode - **Browser or desktop:** read [UI steps](references/ui.md); start with [the UI request](assets/example.json). - **Game or simulation:** read [world steps](references/world.md); start with [the world request](assets/world.json). Use only the current mode. A simulated world is not permission to operate a real account. The host validates legal actions, checks freshness and applies the result. ## Context and parallelism Jev does not inherit the agent's history. Include the goal, rules, fresh context, legal candidates and relevant outcomes. Batch independent checks in the same request. Use bounded concurrency only for independent requests; the host owns scheduling. Wait for a new observation after an action before asking a dependent question. ## Examples [Next browser action](https://github.com/wuyoscar/jev-skill#sc-a23) · [Browser wait versus intervention](https://github.com/wuyoscar/jev-skill#sc-a24) · [Browser outcome verification](https://github.com/wuyoscar/jev-skill#sc-a25) [More tasks and local templates](references/scenarios.md). Open only the matching row; there is no need to read the full README before a judgment.