BA AI Collective - public file-check record
Checked: 23 October 2026

Free Practice Lab: LAB-SERVICE-01, v3 review preview
Packaging edition in Start Here: 15 September 2026
File: ba-practice-lab-free-preview.zip
SHA-256: 241bd061c25a917570cdbc5c2661eee5d4a4e59e7d51c11a43db226b0b1b237b

Checks performed with Python zipfile, hashlib and XML inspection:
PASS - ZIP CRC integrity check.
PASS - all ten payload files match the byte lengths and SHA-256 hashes in
       FILE-MANIFEST.json.
PASS - standalone ba-practice-lab-workbook.xlsx is byte-identical to the
       bundled 02-Learner-workbook.xlsx.

Contents: four PDF guides, four editable Markdown guides, one XLSX workbook,
Start Here and the integrity manifest. The workbook contains eight sheets:
Start here; Case sources; My analysis; Questions; Decisions; Requirements;
Acceptance tests; Change and review.

Scope: archive integrity and workbook structure only. This check did not open,
edit, save or reopen the workbook in Microsoft Excel. It does not establish
screen-reader usability, participant outcomes or compatibility with other apps.
The workbook retains its review-preview label; participant testing is pending.

Paid Starter and Complete v7:
The supplied publisher summary reports Excel 16.0 open/edit/save/reopen checks
on 13 paid workbooks and checks on changed and representative Word files.
Detailed RELEASE-NOTES.txt records are inside the paid ZIPs. Those ZIPs were
not available for an independent file-level check in this pass. No paid-file
hashes, page counts, per-file results or additional compatibility claims are
made here. Public worked-example images can be inspected at:
https://baaicollective.com/previews

Practice files: https://baaicollective.com/practice-lab#materials
Support: contact@baaicollective.com