Haiku handoff on CLI retry -- delegate mechanical CLI retries to Haiku after 2 failures

After two same-kind failures on a mechanical CLI call (suggest/skill add/edit/mail/git commit with arg or validation errors), stop retrying inline on Sonnet/Opus and spawn a Haiku agent. Saves tokens and surfaces validator bugs faster. Brief must include exact cmd, verbatim error, goal, and 3 skill refs.

Steps