Nice work on the notebook support — clean implementation that follows the VS Code notebook API well. A
few things I'd like addressed before merging:

Must fix

XSS in HTML result rendering (src/notebooks/controller.ts:139)

escapeHtml doesn't escape single quotes. Query results come from the database, so if someone stores
malicious strings in column values they'd render unescaped in the notebook output. Please add '
handling:

private escapeHtml(s: string): string {
return s.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>')
.replace(/"/g, '"').replace(/'/g, ''');
}

Should fix

Silent parse failures in serializer (src/notebooks/serializer.ts:17)

If a .exabook file contains malformed JSON, the user gets an empty notebook with no indication anything
went wrong. This would be really confusing if a file gets corrupted. Please surface a warning:

catch {
vscode.window.showWarningMessage('Failed to parse .exabook file — opening as empty notebook.');
raw = [];
}

No input validation on deserialized cells (src/notebooks/serializer.ts:20-24)

The deserializer trusts the JSON shape completely — if kind or value is missing or the wrong type, it'll
throw at runtime. A guard like Array.isArray(raw) && raw.every(c => typeof c.value === 'string') would
prevent cryptic errors.

Worth checking

Disposable registration (src/extension.ts:55)

notebookController (the wrapper class) gets pushed into context.subscriptions. The class has a dispose()
method so it should work, but please verify VS Code's subscription mechanism actually calls it. If not,
you may need to push the inner this.controller directly.

Version history

The changelog backfills 1.3.1 and 1.3.2 entries that weren't in the previous version — was 1.3.3
actually published to the marketplace? If not, the rewritten history could confuse users tracking
versions.

Everything else looks good — CodeLens scheme check, transientOutputs: true, cancellation wiring, 500-row
cap, and the dependency cleanup are all solid.

Thanks for the thorough review! All items addressed:

Must fix

• XSS in escapeHtml — added single-quote escaping ('). Also extracted escapeHtml into notebookUtils.ts with 9 unit tests covering each character, combined strings, and double-encoding prevention.

Should fix

• Silent parse failures — deserializeNotebook now shows a warning message on malformed JSON or non-array content.
• Input validation — extracted parsing into a standalone parseExabookCells() function with proper guards: Array.isArray check, null-safe filter (cell != null && typeof cell === 'object'), type validation on value and language fields. 13 unit tests cover all edge cases (null elements, missing fields, primitives in array, etc.).

Worth checking

• Disposable registration — verified correct. ExasolNotebookController.dispose() delegates to this.controller.dispose(), and VS Code's context.subscriptions calls .dispose() on any object with that method.
• Version history — the 1.3.1 entry was repositioned to correct chronological order (tag v1.3.1 exists, entry was misplaced after 1.2.0 on main). 1.3.3 comes from the parallel fix/raw-response-numresults branch. No content was changed in existing entries.

Additional fixes from deep review

• Interrupt for Run All — interrupt() was a no-op; added an interrupted flag that breaks the cell loop so pressing stop actually prevents remaining cells from executing.
• Unused sql parameter — removed from renderResult signature.
• Row cap mismatch — removed the separate 500-row display cap; the executor's maxResultRows LIMIT is now the single source of truth.
• Error formatting — switched from inline error instanceof Error ? error.message : String(error) to the centralized formatError() which handles AggregateError and error codes.
• Scrollable results — wrapped the HTML table in a max-height:600px scroll container with sticky headers to prevent large results from making the notebook unusable.

Total: 22 new unit tests (216 passing).