# Temporal Placement > Decide whether logic belongs in Workflow, Activity, Worker bootstrap, or Client, and give a minimal skeleton. Use when this capability is needed. - Skill: `tomevault-io/temporal-placement` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/temporal-placement` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/temporal-placement/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Productivity - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/temporal-placement --- # Placement Decision: Workflow vs Activity vs Worker vs Client ## When to use Use when the user describes logic and asks where it belongs, or when code boundaries are unclear. ## Decision rules - **Workflow**: orchestration, durable state, timers, waiting, child workflows, calling activities. - **Activity**: side effects, IO (DB/network/files), CPU-heavy non-deterministic work, external services. - **Worker**: registrations, task queues, interceptors, converters/codecs, DI/host configuration. - **Client**: start/signal/query/update workflows; idempotency keys; request shaping. ## Required output Return: - A 4-row table (Workflow/Activity/Worker/Client) with **Yes/No**, **Why**, and **Minimal snippet** - A single “recommended boundary” diagram in text (e.g., bullets) ## Guardrails - If anything touches time/randomness/IO: default to **Activity** unless proven deterministic in workflow. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/rebeccapowell) — claim your Tome and manage your conversions.