Replace repository with grok-reg-protocol-cpa project

Overwrite previous grok-keygen contents with the local registration/CPA protocol codebase (secrets and runtime data excluded).

cpa_xai/accounts.py

@@ -0,0 +1,58 @@
+"""Parse register machine accounts_cli.txt lines."""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from pathlib import Path
+
+
+@dataclass
+class AccountLine:
+    email: str
+    password: str
+    sso: str
+    raw: str
+    line_no: int
+
+
+def parse_accounts_file(path: str | Path) -> list[AccountLine]:
+    path = Path(path)
+    out: list[AccountLine] = []
+    if not path.is_file():
+        return out
+    for i, line in enumerate(path.read_text(encoding="utf-8", errors="replace").splitlines(), 1):
+        s = line.strip()
+        if not s or s.startswith("#"):
+            continue
+        parts = s.split("----")
+        if len(parts) < 2:
+            continue
+        email = parts[0].strip()
+        password = parts[1].strip()
+        sso = parts[2].strip() if len(parts) > 2 else ""
+        if not email or not password:
+            continue
+        out.append(AccountLine(email=email, password=password, sso=sso, raw=s, line_no=i))
+    return out
+
+
+def existing_cpa_emails(auth_dir: str | Path) -> set[str]:
+    """Emails already present as xai-*.json in auth_dir."""
+    auth_dir = Path(auth_dir)
+    found: set[str] = set()
+    if not auth_dir.is_dir():
+        return found
+    for p in auth_dir.glob("xai-*.json"):
+        name = p.name[len("xai-") : -len(".json")]
+        if name:
+            found.add(name.lower())
+        try:
+            import json
+
+            d = json.loads(p.read_text(encoding="utf-8"))
+            em = str(d.get("email") or "").strip().lower()
+            if em:
+                found.add(em)
+        except Exception:
+            continue
+    return found