> ## Documentation Index > Fetch the complete documentation index at: https://gadget.aurelienbbn.com/llms.txt > Use this file to discover all available pages before exploring further. # Rules > All 16 rules organized by category with severity, type, and fixability. ## Options and params Validate that `options` and `params` exports contain values Gadget can serialize and process. Enforce that the Gadget action options export contains only valid JSON-serializable literals.{" "} error {" "} fixable Enforce that Gadget action params export only uses supported JSON schema types and properties.{" "} error Enforce that timeoutMS in Gadget action options does not exceed 900000ms (15 minutes).{" "} error {" "} fixable Require returnType to be explicitly set in the options export of Gadget actions.{" "} warn {" "} fixable Require a trailing inline comment describing the duration on the timeoutMS property in Gadget action options.{" "} warn {" "} fixable Disallow actionType in global action options.{" "} warn {" "} fixable Disallow invalid actionType values in model action options.{" "} warn Disallow scheduler triggers in model action options.{" "} warn {" "} fixable Disallow timeoutMS above 5000ms on model actions without explicitly setting transactional: false.{" "} warn ## Runtime safety Prevent empty handlers, missing types, and patterns that cause transaction timeouts or billing surprises. Disallow awaiting handle.result() inside run or onSuccess exports in Gadget actions.{" "} warn Disallow empty onSuccess exports in Gadget actions.{" "} warn {" "} fixable Disallow returning a value from onSuccess in Gadget actions.{" "} warn {" "} fixable Require Gadget action run and onSuccess exports to use generated type annotations.{" "} warn {" "} fixable Require a run export when onSuccess is exported in Gadget actions.{" "} warn ## Enqueue safety Enforce explicit retries and concurrency limits on `api.enqueue()` calls. Disallow maxConcurrency values exceeding Gadget's hard limit of 100 in api.enqueue queue options.{" "} warn Require explicit retries option on api.enqueue calls to avoid unintended retry behavior.{" "} warn