Add explicit handoff/cycling heuristics for the Witness role:
- Hand off after 15 patrol loops (vs Deacon's 20)
- Immediate handoff after extraordinary actions
- Define extraordinary actions specific to Witness role
- Add Handoff (Wisp-Based) section explaining idempotent patrols
This brings Witness documentation in line with Deacon's level of
detail for context cycling.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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