TASK22211: version memory-bank and backfill change-log stream

memory-bank/README.md

@@ -0,0 +1,38 @@
+# Memory Bank Operating Protocol
+
+## Purpose
+
+Capture durable engineering knowledge for PEDW FrontEnd so AI agents and humans make consistent, safe decisions over time.
+
+## When to Update
+
+Update memory-bank entries when any of the following occur:
+
+1. A non-trivial architectural or implementation decision is made.
+2. A recurring pattern is introduced or standardized.
+3. A pitfall/incident/root cause is discovered.
+4. A release introduces meaningful behavior/risk changes.
+5. Open questions block safe delivery.
+
+## Who Updates
+
+- **AI agent:** must add or amend entries for non-trivial changes completed during a task.
+- **Human engineer/reviewer:** validates or amends entries during PR review.
+- **Tech lead/owner:** resolves open questions and marks decisions as accepted/superseded.
+
+## Required Metadata (for every new entry)
+
+- `date:` YYYY-MM-DD
+- `author:` agent name or person
+- `scope:` files/routes/features affected
+- `type:` decision | pattern | pitfall | change | question | glossary
+- `rationale:` why this matters
+- `impact:` user/system/security/i18n/a11y implications
+- `status:` proposed | accepted | superseded | open | resolved
+
+## Entry Quality Rules
+
+- Keep entries concise and specific to this repository.
+- Link to concrete files/paths where possible.
+- Do not include secrets, tokens, personal data, or sensitive payload examples.
+- If uncertain, record assumptions explicitly and add to `open-questions.md`.