[META] Context source plugin feature (context from PDF/MD/Word/URL/etc)

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Update Summary: [One-line status update for stakeholders]
Check-in Date: MM/DD/YYYY
Blocked by: [#XXXXXX] (New issues on new lines)
Additional Collaborators: @username1, @username2
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Problem/Motivation

We want a generic mechanism for adding context source plugins, such as loading context from a:

• PDF
• MD file
• Word doc
• Google doc
• Single webpage (URL)

And converting the info to markdown, and inserting it into the ai_context_item content entity content field.

Note that the source will provide the initial information, but the user can edit it using the ai_context_item content entity form as they do for manually-entered context.

For now, we can assume external documents are publicly accessible, but a future feature would allow private documents, so would need access control handling.

We also need a way to resync with the source, which will wipe out any changes the user has made. This is more relevant for external sources, such as a web page with brand guidelines.

Proposed resolution

See discussions in:

#3547034: [Spike] Research URL support for CCC
#3547035: [Spike] Research PDF upload support for CCC

We will use the new Document Loader system.

We might use the AI File to Text module which:

• Extracts content from Word (.docx, .doc), OpenDocument (.odt, .ods), PDF, CSV, TXT, and Markdown (.md) files.
• Three output formats: plain text, styled HTML, or Markdown.

Target date or deadline

April 2026

Remaining tasks

• Design workflow
• Create plugin architecture
• Implement key plugins
• See additional child issues

AI usage (if applicable)

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