notebook: add docx→markdown converter for openwebui knowledge bases

- 000-configs/notebooks/docx_to_markdown_openwebui.ipynb (29 cells)
- mammoth + python-docx fallback, manifest dedup (SHA-256), pre-flight
  fuzzy dedup (Jaccard @ 0.97), URL extraction, gzip download
- 000-configs/notebooks/README.md: index of notebooks + how-to-add
- 000-configs/README.md: list notebooks/ subfolder in the table
- 07-tasks/docx-to-markdown-converter-notebook.md: full task writeup

000-configs/README.md

@@ -21,6 +21,7 @@ Server, model, and workspace configuration docs. Mirror of `/home/user/000-confi
 | [[skills/]] | Skill definitions |
 | [[modes/]] | Model mode presets (creative, research, code, etc.) — incl. `workplace-modes.md` |
 | [[workspace/]] | Workspace layouts and setup |
+| [[notebooks/]] | Jupyter / Colab notebooks (runnable .ipynb artifacts) |
 | [[settings/]] | Open WebUI / server settings |
 
 ## Migration Note

000-configs/notebooks/README.md

@@ -0,0 +1,32 @@
+---
+title: "Notebooks"
+status: "active"
+folder: "000-configs/notebooks"
+tags: [readme, notebook, code]
+created: "2026-07-30"
+updated: "2026-07-30"
+version: "1.0.0"
+---
+
+# Notebooks
+
+Executable Jupyter / Colab notebooks that accompany research projects or workspace workflows. These are *runnable* artifacts (.ipynb), not docs — the companion writeup lives in `06-research/` or as a task in `07-tasks/`.
+
+## How to use
+
+1. Download the `.ipynb` from this folder (or `git pull` on your PC and open in Obsidian / Jupyter / Colab).
+2. Open in **Google Colab** for the Cloud-Drive-backed workflows (most notebooks here assume Colab free tier + Drive mount).
+3. Update the task file in `07-tasks/` when you re-run or modify.
+
+## Current notebooks
+
+| Notebook | Purpose | Companion task |
+|---|---|---|
+| [[docx_to_markdown_openwebui.ipynb]] | DOCX + MD → clean Markdown for Open WebUI knowledge bases (mammoth + python-docx fallback + fuzzy dedup + URL extraction) | [[07-tasks/docx-to-markdown-converter-notebook]] |
+
+## When adding a new notebook
+
+1. Drop the `.ipynb` here.
+2. Add a row to the table above with a link.
+3. Create or update a task in `07-tasks/<slug>.md` describing what it does and how to run it.
+4. Commit with `notebook: <one-line>` per the repo commit-message convention.