chore: initialize minions template repository

CHANGELOG.md

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+# CHANGELOG
+
+All notable changes to this repository are tracked here.
+
+## 2026-04-08 (Initial Entry)
+
+- Commit hash: pending (next commit)
+- Updated shared runtime handoff order to include `SM` between `CM` and `OM-Test` / `OM` in:
+  - `MEMORY.md`
+- Updated handoff interpretation to define `SM` security posture check before runtime gate in:
+  - `MEMORY.md`
+- Updated completion contract `NEXT OWNER` allowed values to include `SM` in:
+  - `MEMORY.md`
+- Bumped template version to `1.2.5-1.0.0` in `minion-version.md`
+
+## 2026-04-08 (Earlier Entry)
+
+- Commit hash: pending (next commit)
+- Added a standardized "Completion Handoff Contract (ADHD-Friendly)" with exact required order and hard rules in:
+  - `MEMORY.md`
+  - `INIT.md`
+  - `minions/chat/README.md`
+- Strengthened PM guardrails to explicitly reject handoffs without evidence and clear `NEXT OWNER` assignment in:
+  - `minions/roles/PM.md`
+- Bumped template version to `1.2.4-1.0.0` in `minion-version.md`
+
+## 2026-04-08
+
+- Commit hash: pending (next commit)
+- Added mandatory completion-update requirements so minions always identify next owner and explicit Operator action needed:
+  - updated `MEMORY.md`
+  - updated `INIT.md`
+  - updated role guardrails in `minions/roles/CM.md`, `minions/roles/PM.md`, `minions/roles/OM.md`, and `minions/roles/SM.md`
+- Bumped template version to `1.2.3-1.0.0` in `minion-version.md`
+- Initialized repository `CHANGELOG.md` as required by template guardrails