docs: refine downstream onboarding workflow

CHANGELOG.md

@@ -2,6 +2,28 @@
 
 All notable changes to this repository are tracked here.
 
+## 2026-04-12
+
+- Commit hash: pending (next commit)
+- Corrected the downstream onboarding/export model so `.minions-template/` is an export-ready snapshot rather than a raw repo copy in:
+  - `README.md`
+  - `INIT.md`
+  - `MEMORY.md`
+  - `docs/collaboration-playbook.md`
+  - `docs/operator-onboarding-checklist.md`
+  - `docs/downstream-onboarding-playbook.md`
+  - `docs/downstream-upgrade-playbook.md`
+  - `docs/export-manifest.md`
+  - `minion-version.md`
+- Clarified that downstream snapshots must exclude Git metadata and `do-not-export` files such as `.mm.md`
+- Removed `REQUIREMENTS.md` from the shared required-documentation contract and aligned the baseline around `README.md`, `ROADMAP.md`, and `TODO.md` in:
+  - `MEMORY.md`
+  - `.mm.md`
+- Reordered the initial onboarding sequence so controlled export happens before downstream checklist completion in:
+  - `README.md`
+  - `INIT.md`
+- Bumped template version to `1.3.1-1.0.0` in `minion-version.md`
+
 ## 2026-04-11
 
 - Commit hash: pending (next commit)