Follow up future plan-review note: Consider a short docs/local_agent_loop.md note describing the new preflight-evidenced

[wwind123]

Future follow-up from approved planning for issue #525.

Source context:

• Parent issue: Retry agent CLI disappearance after successful preflight #525
• Approved plan subject: 93ee8ed1acb7d1a1276c4700cce071ce7f071efc94012478205dccef1c8570ba
• Approved plan hash: 93ee8ed1acb7d1a1
• Planning round(s): 1
• Reviewer: Claude
• Original plan item ID(s): item-1

Canonical follow-up:

• Consider a short docs/local_agent_loop.md note describing the new preflight-evidenced disappearance retry and its distinct exhaustion message, for parity with other documented retry behaviors.

Original reviewer notes:

• item-1, round 1, Claude: Consider a short docs/local_agent_loop.md note describing the new preflight-evidenced disappearance retry and its distinct exhaustion message, for parity with other documented retry behaviors.

This was approved as future work during planning. It is outside the current implementation scope and is not a PR-review prior item.