# Bug Report: Additive Extension Model

## Methodology
Reviewed all modified files against SPEC requirements.

## Acceptance Criteria
| # | Criterion | Result |
|---|-----------|--------|
| 1 | orchestrate.md reads from global first | ✅ |
| 2 | orchestrate.md checks extensions/ | ✅ |
| 3 | onboarding.md no diff/merge upgrade | ✅ |
| 4 | onboarding.md creates minimal files | ✅ |
| 5 | onboarding.md documents extensions/ | ✅ |
| 6 | update.sh does simple git pull | ✅ |
| 7 | README.md describes new model | ✅ |
| 8 | No regression in prompt/contract/script behavior | ✅ |

## Findings
1. **Minor**: `references/extensions.md` noted in SPEC but not created — no functional impact, documented elsewhere.

## Verdict: PASS