Gate 1
Access and source
Record account, plan, admin policy, rollout, web and English access, smart features, Google Drive file, source tab, size, usage limit, owner, purpose, and recovery point.
Independent read-write Sheet gate
Google Sheets Canvas Readiness
Describe one source tab, its plan and access, data contract, generated interface, edit authority, sharing, calculations, validation, and recovery. Generate a checklist without connecting to Google Drive or treating a visual mini-app as proof of correct data.
Four readiness gates
Gate 2
Data contract
Define row identity, column types, valid values, formulas, protected fields, sources, freshness, missing data, duplicates, calculations, expected totals, and approved outputs.
Gate 3
Interface and authority
Specify views, filters, cards, metrics, allowed add/edit/delete actions, prohibited fields, prompts, empty and error states, accessibility, users, groups, links, and roles.
Gate 4
Validation and lifecycle
Test round-trip sync, permissions, protections, concurrent edits, invalid inputs, Gemini inaccuracies, usage exhaustion, large data, deletion, version recovery, ownership, and periodic review.
Classify the canvas
Ready for read-only review
The source tab, metrics, filters, labels, roles, and expected totals are defined, and users can inspect the underlying data without operational mutation.
Ready for bounded editing
Only approved fields are editable; identifiers, formulas, and approvals are protected; role and concurrency tests pass; version recovery and an owner are in place.
Keep in grid view
The file, tab size, plan, language, storage, permissions, calculations, data contract, usage, or recovery path does not support a reliable read-write canvas.
Minimum acceptance evidence
Reconcile source row count, calculations, filters, totals, labels, and scenarios; test add, edit, delete, drag, invalid values, missing and duplicate keys, concurrent edits, viewer/commenter/editor roles, protected ranges, link sharing, usage exhaustion, source-tab changes, large data, canvas deletion, and version-history recovery. Repeat after every structural prompt.
Review the canvas decision path
Interactive mini-appsUnderstand the read-write layer, sync model, prompts, and validation.Dashboard and KanbanDesign stable rows, metrics, allowed edits, tests, and protections.Access and data limitsCheck plans, rollout, web, language, storage, size, usage, and roles.
Official facts checked August 19, 2026 against Google's launch, Workspace rollout, and Docs Editors Help. Recheck plans, rollout, permissions, data behavior, usage, and terms in the live account.
Frequently Asked Questions
It creates a checklist from the account, source tab, data contract, interface, permissions, mutations, validation, and recovery facts you provide. It does not access Google Drive, inspect a Sheet, create a canvas, or validate calculations.
Yes. Google says editors can add, edit, or delete spreadsheet data directly through the canvas, with changes synchronized to the source tab.
No. Google currently says each canvas uses data from one Sheet tab. Use a governed summary tab only when lineage, freshness, and reconciliation are preserved.
No. Canvas access follows the spreadsheet. Review users, groups, domain and link sharing, external collaborators, and viewer, commenter, or editor roles.
No. Reconcile source rows, formulas, totals, filters, scenarios, and labels with an approved oracle, and repeat tests after Gemini changes the interface.