A feature is not complete merely because a button appears or a route returns data. It should solve the customer's intended task, work for the tenants and roles it supports, and be operable after release. A definition of done makes these expectations visible before work begins. It should be concise enough that a small SaaS team uses it regularly and flexible enough to reflect the risk of each change.
State the customer outcome
Describe what a user can do when the feature is finished and how success will be checked. For an export, that may mean an authorized user can request a file, see progress, download it, and understand a failure. Include the relevant roles, tenant settings, and supported locales. A vague ticket such as “add export endpoint” can be technically complete while the customer still cannot use the result. Agree on the smallest useful slice and defer optional refinements explicitly rather than silently treating them as done.
Protect important behavior
Verify business rules at the level where they live: tenant isolation, permissions, totals, state transitions, and retry behavior. Run focused tests or an appropriate manual check for the risk. Do not require a large new test suite for a reversible text edit, but do not ship a payment or access change without meaningful evidence. Review API response shape and error keys, including failure states. A feature that works only with a fresh test tenant may fail for existing customers with older data or settings.
Include the full interface
The panel or site should handle loading, empty, success, and error states. Text and accessibility labels need localization in supported locales. Forms need labels and validation feedback; lists need item actions and pagination when relevant. Check keyboard access and responsive behavior for the affected UI. Keep clients thin by returning render-ready data from the API. A UI that reconstructs permissions or rankings locally may work in one screen but drift from another, so the data contract is part of completion.
Prepare operations
Know how the change deploys, whether it needs a migration, how it affects caches, and how to roll back or correct it. Add monitoring for a new critical dependency or background job. Update runbooks and support guidance when operators will be asked about the feature. If a tenant setting controls it, define the default and audit changes. For a modest feature, this may be a short note; for a high-impact integration, it may be a release checklist. The point is to avoid discovering operational ownership only after an incident.
Verify in the assembled product
A part can compile alone while the runnable product fails to load it. Test the relevant composed API, panel, or site path. Check that generated exports and bundles include the new public module. If the feature appears in several products, confirm which are intended to receive it and whether their settings allow it. A preview or staged release can help when the UI change is hard to judge from tests. Record the evidence in the review so another developer can understand what was checked.
Close the feedback loop
After release, confirm that customers can complete the task and that error rates or support cases do not rise. A definition of done is not an invitation to endless polish; it is an agreement about a dependable first delivery. Review the checklist after repeated defects and remove steps that add little value. For SMB SaaS, a practical standard helps a small team ship quickly without leaving hidden work for customers and support staff. A team can use a short template: outcome, risk, verification, release, and follow-up. Fill it proportionately rather than treating every box as a demand for a large document. Make the final status visible to the person who requested the feature, with any remaining limitation stated plainly. Close the work only after the relevant product can use the change, not when an isolated module passes its tests. Verify the customer path in production.