diff --git a/bash/functions/infra/write_jupyter_launcher.sh b/bash/functions/infra/write_jupyter_launcher.sh
index afcb0aef..08880300 100644
--- a/bash/functions/infra/write_jupyter_launcher.sh
+++ b/bash/functions/infra/write_jupyter_launcher.sh
@@ -34,6 +34,11 @@ echo $PORT > .jupyter-port
 
 source .venv/bin/activate 2>/dev/null || true
 
+# IPython startup: cargar .ipython/ local (FN_REGISTRY_ROOT, helpers, sys.path)
+if [ -d "$(pwd)/.ipython" ]; then
+    export IPYTHONDIR="$(pwd)/.ipython"
+fi
+
 if ! python -c "import jupyter_collaboration" 2>/dev/null; then
     echo "ERROR: jupyter-collaboration no esta instalado"
     echo "Instala con: uv add jupyter-collaboration"
diff --git a/bash/functions/infra/write_jupyter_registry_kernel.sh b/bash/functions/infra/write_jupyter_registry_kernel.sh
index 79d46b83..e7a85379 100644
--- a/bash/functions/infra/write_jupyter_registry_kernel.sh
+++ b/bash/functions/infra/write_jupyter_registry_kernel.sh
@@ -33,7 +33,24 @@ import sqlite3
 from pathlib import Path
 
 # ── FN_REGISTRY_ROOT ────────────────────────────────────────
-FN_REGISTRY_ROOT = Path("${registry_root}")
+# Prioridad: env var > path hardcoded > descubrimiento automatico
+def _discover_registry_root():
+    if os.environ.get("FN_REGISTRY_ROOT"):
+        return Path(os.environ["FN_REGISTRY_ROOT"]).resolve()
+    hardcoded = Path("${registry_root}")
+    if (hardcoded / "registry.db").exists():
+        return hardcoded
+    # Subir desde CWD hasta encontrar registry.db
+    p = Path.cwd()
+    for _ in range(10):
+        if (p / "registry.db").exists():
+            return p
+        if p.parent == p:
+            break
+        p = p.parent
+    return hardcoded
+
+FN_REGISTRY_ROOT = _discover_registry_root()
 os.environ["FN_REGISTRY_ROOT"] = str(FN_REGISTRY_ROOT)
 
 # ── sys.path: importar funciones Python del registry ────────