Temporal Agent Harness

Temporal-native agent harness (experimental) — build durable, composable AI agents on Temporal, with the AI SDKs you already use.

⚠️ Experimental. An early, fast-moving project from Temporal Technologies. APIs will change.

The Temporal Agent Harness gives your agents capabilities that are painful and error-prone to build yourself:

agents survive crashes and resume mid-turn, exactly where they left off (no wasted tokens!);
a rich tool-approval policy engine decides exactly when a tool call needs human sign-off — handing control to a human only then, and resuming the moment it’s granted —
agents compose programmatically, through real typed contracts (not limited to just text in, text out);
Code Mode — one tool that runs a Python script over your toolset — so a single turn orchestrates many tool calls with real control flow and concurrency;
callback tools let an agent invoke a tool that runs on the client — reading a file on a user’s laptop, capturing a photo on their phone — even though the agent runs on a remote worker;
agents are **fully…