Cwc Long Running Agents

Harness Primitives for Long-Running Claude Agents

Claude Code's built-in [`/goal`](https://code.claude.com/docs/en/goal) command gives you a generator/evaluator loop out of the box: set a completion condition and a separate fast model checks it after every turn until it's met. This repo ships the same underlying primitives as short, readable [hooks](https://code.claude.com/docs/en/hooks) and a [subagent](https://code.claude.com/docs/en/sub-agents), so you can see how each mechanism works and assemble a harness tuned to your project. The patterns come from [Effective Harnesses for Long-Running Agents](https://www.anthropic.com/engineering/effective-harnesses-for-long-running-agents) (Nov 2025) and [Harness Design for Long-Running Application Development](https://www.anthropic.com/engineering/harness-design-long-running-apps) (Mar 2026). We recommend trying both the in-product features and a custom harness to see which fits your workflow.

Three primitives form the quality loop:

• Default-FAIL contract. Every criterion starts false; the agent can't mark it passing without opening evidence first.
• Fresh-context evaluator. A separate agent with no Write/Edit tools grades the work from a context window that never saw the build.
• Agent-maintained handoff. The agent writes its own progress notes and commits to git so the next session picks up cleanly.

Two more opera