Observed arrival · 2026-08-23
UHP: A Common Control Surface for Agent Harnesses
The Unified Harness Protocol is an open HTTP standard for driving complete agent runtimes such as Codex, Claude Code, and Hermes through one task-oriented interface.
Why it surfaced
UHP treats a job—not a model completion—as the unit of exchange, covering task startup, streaming progress, sessions, files, cancellation, and errors. It publishes versioned OpenAPI and JSON Schema, plus a 52-check conformance suite intended to make compatibility testable rather than merely promised.
The Unified Harness Protocol is an open HTTP standard for driving complete agent runtimes such as Codex, Claude Code, and Hermes through one task-oriented interface.
Observed signals
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