Add a Feature Flag

Full rules and rationale: Feature Flags.

Prerequisites

• Flag name: UPPER_SNAKE_CASE string (e.g. MY_FEATURE) and its constant (MY_FEATURE_FEATURE_FLAG).
• Scope: list of new attributes / mappings, GraphQL endpoints, domain entry points and UI screens of the feature.

Procedure

Step 1 — Declare the constant

Add export const MY_FEATURE_FEATURE_FLAG = 'MY_FEATURE'; with a one-line comment in opencti-platform/opencti-graphql/src/config/conf.js, next to the other flags.

Step 2 — Flag every new attribute definition (DO NOT SKIP)

For each attribute added by the feature — in a module definition's attributes, in src/modules/attributes/*-registrationAttributes.ts, or as a new entry in the mappings of an object attribute — add:

featureFlag: MY_FEATURE_FEATURE_FLAG,

Without it the field is pushed into the ElasticSearch index mapping at startup even when the flag is off, and nothing fails. Re-read every attribute you added before moving on.

Step 3 — Gate GraphQL endpoints

Add @ff(flags: ["MY_FEATURE"]) to every new query, mutation and field (softFail: true for fields read early by the front end). Run yarn build:schema.

Step 4 — Gate domain logic

enforceEnableFeatureFlag(MY_FEATURE_FEATURE_FLAG) at the start of mutations / entry points; isFeatureEnabled(MY_FEATURE_FEATURE_FLAG) for conditional branches.

Step 5 — Gate managers

• New manager: import ManagerDefinition and registerManager from src/manager/managerModule.ts. Import the new manager file for side effects in src/manager/index.ts, and register it with if (isFeatureEnabled(MY_FEATURE_FEATURE_FLAG)) { registerManager(DEFINITION); }. Gate the registration, never enabled() / enabledToStart(): a registered manager shows in the platform modules and startup logs even when the flag is off. Keep its own enabledByConfig config. Do not add it to src/managers.ts.
• Existing manager: leave its registration alone; branch inside the handler with isFeatureEnabled(MY_FEATURE_FEATURE_FLAG).

Reference: src/manager/workflowStatusCleanupManager.ts. Details in the Managers section of Feature Flags.

Step 6 — Gate the UI

const { isFeatureEnable } = useHelper(); then isFeatureEnable('MY_FEATURE') around menus, routes, tabs and form fields. Run yarn relay if GraphQL changed.

Step 7 — Verify

• grep -rn "featureFlag: MY_FEATURE_FEATURE_FLAG" lists every new attribute and mapping.
• With fresh test indices, start the platform with the flag disabled: new attributes are absent from the index mapping and attribute registry. GraphQL fields remain in the schema, but flagged resolvers reject access (or return the soft-fail default); the new manager is neither logged at startup nor listed in the platform modules.
• Start with APP__ENABLED_DEV_FEATURES='["MY_FEATURE"]': the feature works end to end.

Removing a flag

Delete the constant, every featureFlag: MY_FEATURE_FEATURE_FLAG, every @ff(...) and every enforceEnableFeatureFlag / isFeatureEnabled / isFeatureEnable call for it; unwrap the if around registerManager. Search for MY_FEATURE in opencti-graphql and opencti-front and verify that no declarations or guards for this flag remain; retain legitimate feature and manager identifiers.