[petercorke]

Undoes the generated header of #850 and fixes the cell ids. No change to the toolbox. The notebooks are about to be reviewed and edited by hand, and a generated first cell would be overwritten, or fail --check, on any edit; the first cell should reflect the notebook's content, as in MVTB.

What changes

• The first cell is hand-written markdown again. The generator, its tests and the rtb_header metadata are removed; each notebook keeps its current header text, including the "Modernised 2026-10-19" note, as ordinary markdown. The logo is an absolute GitHub URL (as in MVTB), because Colab fetches only the one .ipynb file and showed a broken image for figs/....
• The generated bootstrap cell is unchanged.
• Cell ids. sync_bootstrap.py now gives every cell an id (nbformat 4.5), and --check reports a missing one. Until now VS Code added ids as soon as a notebook was opened, so opening any notebook changed it.
• Editor metadata. clear_outputs.py now also resets the metadata an editor writes (the 13 notebooks had seven different kernel names and versions, and leftover toc, varInspector, widgets, interpreter and vscode blocks) to a canonical kernel and language, keeping only our own rtb_bootstrap key, and writes the file exactly as nbformat does (sorted keys), which VS Code does too: opening and saving a notebook no longer changes it. This is a one-time reordering of keys in every notebook.
• docs/notebooks/README.md says how to edit a notebook: clear the outputs before committing, and run sync_bootstrap.py only after changing the bootstrap template or a notebook's rtb_bootstrap metadata. docs.yml checks both.

18 tests in tests/test_notebook_bootstrap.py pass, and both --check scripts are clean. Written with AI assistance (Claude Code).

🤖 Generated with Claude Code

[codacy-production]

Not up to standards ⛔

🔴 Issues 8 high

Alerts:
⚠ 8 issues (≤ 0 issues of at least minor severity)

Results:
8 new issues

Category	Results
Security	8 high

View in Codacy

🟢 Metrics 12 complexity · -2 duplication

Metric	Results
Complexity	12
Duplication	-2

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (bd9e933) to head (ff00cd8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #859   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files        146     146           
  Lines      16867   16867           
=====================================
  Misses     16867   16867           

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