Allow only files required for the user task, within an explicit size policy and visibility boundary. Treat everything else as rejected until an engineer has reviewed how the upload rules are enforced.
Separate publishing access from file safety
Replit documents publishing controls covering app address, access choices, production database, monitoring, security, and hosting settings. Listed access choices include public, password-protected, workspace-only, and invite-only.
Those publishing choices do not establish automatic file validation, scanning, safe storage, or deletion. As editorial advice, review the app's audience and each uploaded object's access separately. A restricted page is not, by itself, evidence that a file cannot be retrieved through another path.
Write the upload contract
Before generation, specify:
- Purpose: the user task requiring an attachment.
- Allowed types: a narrow list justified by that task.
- Size policy: maximum bytes per file and maximum file count.
- Validation responsibility: who checks that content matches the declared type.
- Visibility: which user or reviewer may retrieve each object.
- Rejection response: understandable feedback without exposing internal details.
- Retention: when files should expire and who verifies deletion.
- Failure handling: what happens if storage succeeds but the surrounding form fails.
These are requirements, not implied security controls. Ask what evidence would demonstrate enforcement beyond the browser interface. Also ask whether the proposed retention and visibility arrangements match contributors' expectations; this is a review question, not legal advice.
Hypothetical poster-submission exercise
Suppose a college club in Kochi accepts synthetic event posters. Its proposed contract permits one PNG or JPEG, no larger than 2,000,000 bytes, visible only to the fictional submitter and designated reviewer.
Prepare harmless synthetic fixtures: a small valid PNG, a valid image over the byte limit, a plain text file named with a .png extension, and two valid images submitted together. Expected outcomes are accept, reject for size, reject for content mismatch, and reject for count.
For the accepted fixture, ask an engineer to verify access using a second synthetic account that should lack permission. Then request deletion and document how removal is checked. Do not upload malicious samples or private documents merely to make the exercise realistic.
Stop if rejection or ownership is undefined
Do not broaden deployment if oversized or mismatched fixtures pass unexpectedly, unauthorised retrieval is possible, or nobody owns deletion verification. Next, resolve the contract and implementation gaps before adding more file types.
For any access purchase supporting the review, inspect the coding catalog for access format and saved terms. Marketplace account/code/token offers are not proof of official subscription equivalence or security controls.
Sources and scope
Source material checked 29 October 2026; features/policies may change. Replit publishing overview establishes publishing configuration and audience choices. The upload contract and synthetic fixtures are editorial advice, not verified Replit upload protections.