From 12a3caf636d3bf6686ffee771052fc321275e179 Mon Sep 17 00:00:00 2001
From: Luis Novo <lfnovo@gmail.com>
Date: Mon, 16 Feb 2026 15:25:58 -0300
Subject: [PATCH 1/2] fix: fail fast when source content extraction returns
 empty

Add empty-content validation in content_process() after extract_content()
returns. Sources with no extractable text (e.g. YouTube videos without
transcripts) now raise ValueError immediately instead of silently saving
an empty source. ValueError is already configured as a permanent failure
in the retry config, so no retries are wasted on unrecoverable situations.

Closes #527
---
 open_notebook/graphs/source.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/open_notebook/graphs/source.py b/open_notebook/graphs/source.py
index dc55390..145f747 100644
--- a/open_notebook/graphs/source.py
+++ b/open_notebook/graphs/source.py
@@ -76,6 +76,21 @@ async def content_process(state: SourceState) -> dict:
         # Continue without custom audio model (content-core will use its default)
 
     processed_state = await extract_content(content_state)
+
+    if not processed_state.content or not processed_state.content.strip():
+        url = processed_state.url or ""
+        if url and ("youtube.com" in url or "youtu.be" in url):
+            raise ValueError(
+                "Could not extract content from this YouTube video. "
+                "No transcript or subtitles are available. "
+                "Try configuring a Speech-to-Text model in Settings "
+                "to transcribe the audio instead."
+            )
+        raise ValueError(
+            "Could not extract any text content from this source. "
+            "The content may be empty, inaccessible, or in an unsupported format."
+        )
+
     return {"content_state": processed_state}
 
 

From 115e1cc3e81359ad85a15801efea0fd0e88ad1eb Mon Sep 17 00:00:00 2001
From: Luis Novo <lfnovo@gmail.com>
Date: Mon, 16 Feb 2026 15:27:29 -0300
Subject: [PATCH 2/2] chore: bump podcast-creator to 0.9.1

---
 pyproject.toml | 2 +-
 uv.lock        | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 28aa707..1fded1a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dependencies = [
     "ai-prompter>=0.3,<1",
     "esperanto>=2.19.3,<3",
     "surrealdb>=1.0.4",
-    "podcast-creator>=0.9,<1",
+    "podcast-creator>=0.9.1,<1",
     "surreal-commands>=1.3.1,<2",
     "numpy>=2.4.1",
 ]
diff --git a/uv.lock b/uv.lock
index 9c328cd..06cf623 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2168,7 +2168,7 @@ requires-dist = [
     { name = "loguru", specifier = ">=0.7.2" },
     { name = "mypy", marker = "extra == 'dev'", specifier = ">=1.11.1" },
     { name = "numpy", specifier = ">=2.4.1" },
-    { name = "podcast-creator", specifier = ">=0.9,<1" },
+    { name = "podcast-creator", specifier = ">=0.9.1,<1" },
     { name = "pre-commit", marker = "extra == 'dev'", specifier = ">=4.0.1" },
     { name = "pydantic", specifier = ">=2.9.2" },
     { name = "pytest", marker = "extra == 'dev'", specifier = ">=8.0.0" },
@@ -2519,7 +2519,7 @@ wheels = [
 
 [[package]]
 name = "podcast-creator"
-version = "0.9.0"
+version = "0.9.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "ai-prompter" },
@@ -2535,9 +2535,9 @@ dependencies = [
     { name = "requests" },
     { name = "tiktoken" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/a7/2a/b965715040e9295bc5bfb8aa30869ef26f25815e3bfd0a05dba1d98eb10e/podcast_creator-0.9.0.tar.gz", hash = "sha256:9fd706e616a3ee6b71f34eafa284ed272b8fd24c857db2b4970dc85f646329bf", size = 469820, upload-time = "2026-01-30T01:59:19.509Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/7d/de/f7ee60b502dad23b724d669be31fdeb6a790e306968c2cd6a079388262be/podcast_creator-0.9.1.tar.gz", hash = "sha256:177ae68b18c7efd815e555dcec3c644e541bd053e2c63669fd0a18a008b2f374", size = 470751, upload-time = "2026-02-16T17:58:44.275Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/41/6d/d576690f1fd8ac5e2d1a830fb799ec848de425c65b401b402e5579c02a9d/podcast_creator-0.9.0-py3-none-any.whl", hash = "sha256:c1a3c36c77fc1c86edb45217d085f96f10ddd83a1fab7c4e5e17c21253af1e16", size = 74109, upload-time = "2026-01-30T01:59:18.355Z" },
+    { url = "https://files.pythonhosted.org/packages/e0/d7/687284d059fc490a19d60af8f07a66b19895e15946e7ced143096d3c5ea0/podcast_creator-0.9.1-py3-none-any.whl", hash = "sha256:e3e513f2aacccd96c15bcab891216ff447568551c4392b3f12575aa0cf0cbeee", size = 74421, upload-time = "2026-02-16T17:58:42.818Z" },
 ]
 
 [[package]]