Strengthen doc-first protocol and clarify Claude mapping

Updated copilot-instructions.md to enforce stricter documentation-first and multi-repo rules, including cross-repo doc loading, per-question doc checks, and improved context recovery triggers. Broadened explicit consent to all file types. Updated CLAUDE.md with sequential execution override and tool mapping, ensuring Claude follows the same protocol and rule set.

CLAUDE.md

@@ -1 +1,17 @@
 CRITICAL: Your FIRST action in every session MUST be reading `.github/copilot-instructions.md`. Execute ALL session-start instructions found there before responding to any user query. It is the single source of truth for this repo.
+
+## SEQUENTIAL EXECUTION OVERRIDE
+The AI AGENT CORE PROTOCOL in copilot-instructions.md requires STRICT SEQUENTIAL execution. This OVERRIDES your default parallelization behavior. Do NOT parallelize doc reads with code searches. The sequence is:
+1. Read copilot-instructions.md → process its rules FULLY
+2. Read ALL docs/ .md files listed in the protocol → wait for completion
+3. Output [LOADED_DOCS: ...] prefix
+4. ONLY THEN respond to the user's query or search code
+
+## Tool mapping for AI AGENT CORE PROTOCOL
+The copilot-instructions.md references Copilot tool names. Map them to Claude Code tools:
+- `get_file` / `file_search` → `Read`, `Glob`, `Grep`
+- `code_search` / `get_symbols_by_name` / `find_symbol` → `Grep`, `Glob`
+- `replace_string_in_file` / `edit_file` → `Edit`
+- `create_file` → `Write`
+
+Follow the protocol using YOUR tools. The rules (LOADED_DOCS prefix, hard-gate, no-re-read, context recovery, explicit consent) apply equally to Claude Code.