harness

Executable protocol enabling any agent task to run continuously across multiple sessions with automatic progress recovery, task dependency resolution, failure rollback, and standardized error handling.

Free-text log of all agent actions across sessions. Never truncate.

Task statuses: pending → inprogress (transient, set only during active execution) → completed or failed. A task found as inprogress at session start means the previous session was interrupted — handle via Context Window Recovery Protocol.

This skill should be used for multi-session autonomous agent work requiring progress checkpointing, failure recovery, and task dependency management. Triggers on '/harness' command, or when a task involves many subtasks needing progress persistence, sleep/resume cycles across context windows, recovery from mid-task failures with partial state, or distributed work across multiple agent sessions. Synthesized from Anthropic and OpenAI engineering practices for long-running agents. Source: cexll/myclaude.