DL-138

A Compass role’s system prompt REPLACES OMP’s block 0 via the fork’s customSystemPrompt path (custom-system-prompt.md), which keeps auto-injected skills/rules/always-apply lists and the project/env footer by construction — append is rejected (it pays for both prose sets every turn; the skills-loss fear was the fixed #3014 pre-fix behavior)

Status: Active (Matt, 2026-08-04)

Record: ../../agent/compass-manager-prompt/design.md#decision-mp-1–replace-block-0-per-role-through-omps-custom-prompt-template-dl-129