feat(cli): pass detected agent_caller to backend on Agent Mode bootstrap

The CLI's detect_agent_caller() already canonicalizes the caller (env-var
sniff returning "claude-code", "cursor", etc.) and reports it to PostHog —
but the value never reached the backend, so APIKey.agent_caller stayed
NULL. Join: send it in the bootstrap request body so the platform can
persist it (see mem0ai/platform#2784).

Wire-up:
- bootstrap_via_backend / bootstrapViaBackend gain an agent_caller kwarg,
  pass it as request body field "agent_caller"
- init_cmd / init.ts call detect_agent_caller() once and forward
- platform.agent_caller persisted to ~/.mem0/config.json so the local
  view matches what the backend stored

No change to created_via — that stays the channel enum ("agent_mode" /
"email" / "api_key"). agent_caller is the orthogonal "who started this".

cli/python/src/mem0_cli/commands/agent_mode_cmd.py

@@ -32,16 +32,25 @@ def bootstrap_via_backend(
     config: Mem0Config,
     *,
     source: str | None = None,
+    agent_caller: str | None = None,
 ) -> None:
     """POST /api/v1/auth/agent_mode/ and mutate config in place.
 
-    Returns nothing — the caller saves the config and prints follow-up messages.
+    Args:
+        config: Mem0Config mutated in place with the new platform values.
+        source: ``--source`` flag passthrough (analytics tag, free-form).
+        agent_caller: Canonical agent name detected from env vars
+            (claude-code, cursor, ...). Persisted on the backend APIKey and
+            saved into ``platform.agent_caller`` for local introspection.
+
     Raises typer.Exit(1) on failure.
     """
     base_url = (config.platform.base_url or "https://api.mem0.ai").rstrip("/")
     body: dict[str, Any] = {}
     if source:
         body["source"] = source
+    if agent_caller:
+        body["agent_caller"] = agent_caller
 
     try:
         with httpx.Client(timeout=30.0) as client:
@@ -84,6 +93,7 @@ def bootstrap_via_backend(
     config.platform.base_url = base_url
     config.platform.agent_mode = True
     config.platform.created_via = "agent_mode"
+    config.platform.agent_caller = agent_caller or ""
     config.platform.claimed_at = ""
     config.platform.default_user_id = envelope["default_user_id"]
     # Adopt the slug-derived user_id as the default scope for memory ops.

cli/python/src/mem0_cli/commands/init_cmd.py

@@ -295,7 +295,7 @@ def run_init(
                 _fire_init("existing_key")
                 return
         # Rule 3: mint a fresh shadow (no valid key to reuse).
-        bootstrap_via_backend(config, source=source)
+        bootstrap_via_backend(config, source=source, agent_caller=detect_agent_caller())
         _fire_init("agent")
         return
 

cli/python/src/mem0_cli/config.py

@@ -31,6 +31,7 @@ class PlatformConfig:
     # Agent Mode (unclaimed-shadow signup)
     agent_mode: bool = False  # True while the key is an unclaimed agent-mode key
     created_via: str = ""  # "agent_mode" | "email" | "api_key" | "existing_key"
+    agent_caller: str = ""  # canonical agent name when created_via == "agent_mode" (e.g. "claude-code")
     claimed_at: str = ""  # ISO timestamp once the agent has been claimed by a human
     default_user_id: str = ""  # `user_<slug>` returned by bootstrap; used as auto-default
 
@@ -90,6 +91,7 @@ def load_config() -> Mem0Config:
         config.platform.user_email = plat.get("user_email", "")
         config.platform.agent_mode = bool(plat.get("agent_mode", False))
         config.platform.created_via = plat.get("created_via", "")
+        config.platform.agent_caller = plat.get("agent_caller", "")
         config.platform.claimed_at = plat.get("claimed_at", "")
         config.platform.default_user_id = plat.get("default_user_id", "")
 
@@ -147,6 +149,7 @@ def save_config(config: Mem0Config) -> None:
             "user_email": config.platform.user_email,
             "agent_mode": config.platform.agent_mode,
             "created_via": config.platform.created_via,
+            "agent_caller": config.platform.agent_caller,
             "claimed_at": config.platform.claimed_at,
             "default_user_id": config.platform.default_user_id,
         },