Practitioners Are Now Saying 'My Harness' to Mean a Custom Outer Loop Around Claude Code, Not Claude Code Itself

r/ClaudeAI (167 upvotes, 79 comments); corroborated by temporal.io/blog/temporal-agent-harness-durable-agent-infrastructure·medium signalXBlueskyLinkedInCopy link

A 167-upvote r/ClaudeAI thread with 79 comments asks what people on LinkedIn mean when they talk about 'their harness', and the answers separate the inner harness (Claude Code, Codex) from a custom outer loop that supervises it. The same distinction shows up in the Anthropic newsletter excerpt quoted in a companion thread, describing two lead agents that restart each other on failure and delegate to tech lead or PM agents across 8-10 concurrent projects, and in Temporal's Agent Harness announcement on 2026-08-20, which explicitly frames itself as durability wrapped around whichever inner harness you already use. The vocabulary hardening is worth tracking because it marks where tooling attention is moving.