> ## Documentation Index
> Fetch the complete documentation index at: https://docs.a2v2.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Manage & Reprocess Sources
> Track source status, reprocess after changes, and remove content your agent should forget.
Once you've added content, the Knowledge Base list is where you keep it healthy —
checking what's indexed, retraining when content changes, and removing what's out
of date.
## Prerequisites
* An agent with at least one source (see [Knowledge Base Overview](/knowledge-base/overview)).
## Review your sources
Open **Expertise → Knowledge Base** to see every source in a table with its
**Name**, **Type**, **Characters**, **Created/Updated** date, **Status**, and an
**Actions** menu. Use the search box and the **Status** / **Sort by** filters to
find what you need.
| Status | What to do |
| --------------- | -------------------------------------------------------- |
| **Unprocessed** | Just added — queued for indexing. |
| **Processing** | Being read, chunked, and indexed. Wait for it to finish. |
| **Completed** | Live — nothing to do. |
| **Failed** | Reprocess, or remove and re-add the source. |
Each row's **Actions** menu (the **⋯** button) has **View Details**, **Reprocess**,
and **Delete**.
## Reprocess a source
Reprocess when the underlying content has changed (an updated document, an edited
web page) or when a source **Failed** and you want to try again.
Locate it in the Knowledge Base list.
Open the row's **Actions** menu (**⋯**) and select **Reprocess**. It re-reads,
re-chunks, and re-indexes the content.
The status returns to **Processing**, then **Completed** when done.
Reprocessing re-indexes the source so the agent learns the latest version. For a
website or YouTube source, it re-fetches the current content at the URL.
## Update a Q\&A
For [Q\&A sources](/knowledge-base/qa), you can edit the question or answer
directly from the list — the pair is re-indexed automatically after you save.
## Remove a source
Open the row's **Actions** menu (**⋯**) and select **Delete** to make the agent
forget a source. This removes the content from the agent's index, so it will no
longer appear in answers. Use **View Details** in the same menu to inspect a
source before acting on it.
Removing a source is permanent for that agent's index. If you might need the
content again, keep the original file or URL handy so you can re-add it.
## Tips
* After a big content update, reprocess the affected sources and re-test in the
[Sandbox](/testing/sandbox) before customers see the change.
* Periodically prune stale sources — outdated content is the most common cause of
wrong answers.
## Related