diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index 4279b4c9..55ce08c4 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -136,7 +136,7 @@ Skills defined in other repos. **Two reactive skills are pre-loaded at session s
   Location: `AyCode.Core/.github/skills/adr-author/SKILL.md`
   **Invoke on explicit user request** ("let's plan X", "decide Y vs Z", "design the W module") **or proactively flag** when the conversation looks ADR-worthy (user must confirm — never auto-invoke).
 
-- **docs-archive** — Rotate closed entries (Status: Fixed/Resolved/Won't fix/Superseded by X) from active `_ISSUES.md`, `_TODO.md`, and `LLM_PROTOCOL_DECISIONS.md` into year-bucketed archive companions (`*_<year>.md`). Year of the Status update determines destination file. Active files retain only Open/Partially Fixed entries plus a pointer to the archives. Archive files are NOT auto-loaded — agents read them on-demand when historical context becomes relevant.
+- **docs-archive** — Rotate entries from active `_ISSUES.md`, `_TODO.md`, and `LLM_PROTOCOL_DECISIONS.md` into **year-month bucket** archive companions (`*_<YYYY>_<MM>.md`). Two rules: **(A)** `_ISSUES.md` / `_TODO.md` — only `Status: Closed` entries are archive-eligible (per `TOPIC_CODES.md` 3-value vocabulary: `Open` / `InProgress` / `Closed`); **(B)** `LLM_PROTOCOL_DECISIONS.md` — last-15-active rolling window (LLMP-DEC-67), older entries rotate by entry date. Bucket derived from a date in the entry body. Active files retain `Open` / `InProgress` entries plus a pointer to the archives. Archive files are NOT auto-loaded — agents read them on-demand when historical context becomes relevant.
   Location: `AyCode.Core/.github/skills/docs-archive/SKILL.md`
   **Invoke on explicit user request** ("archive ISSUES", "rotate logs") **or proactively flag** when an active artifact file has many closed prior entries (user must confirm — never auto-invoke).