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The short answer
A feature flag can bound exposure to an AI behavior when assignment is stable, the disabled path is defined, and execution records show which configuration actually ran. Test the flag together with task state, caches, and tool authorization. A disabled interface control is not proof that a background action stopped.
What to take away
- Choose the assignment unit before choosing a rollout percentage.
- Define a fallback when flag evaluation is unavailable.
- Keep authorization separate from feature exposure.
Sources checked . Research synthesis and Rubrex recommendations. Examples and local experiments are labeled; they are not client results.
Decide which context may influence assignment
OpenFeature documents an evaluation context containing a targeting key and additional attributes. Its availability does not decide which application data should be sent to a flag provider. Rubrex recommends the smallest context needed to assign an approved exposure group and reconstruct that assignment later.
For a synthetic document assistant, use a stable tenant or conversation identifier rather than a raw email, prompt, or retrieved document. Identify whether exposure is assigned per request, conversation, account, or organization. If one workflow contains several calls, a request-level lottery can create mixed behavior inside a task that the product team expected to remain consistent.
Evidence: OpenFeature: Evaluation Context [1]
Check consistency across caches and workers
Attach the evaluated flag version or resolved configuration to the task record. If the new behavior changes answer semantics, include the relevant version boundary in cache eligibility or invalidate affected entries. Otherwise a disabled candidate can continue appearing through responses generated while it was enabled.
Use an illustrative task with a queued background step. Change the flag between request acceptance and worker execution, then verify the product's declared rule: honor the pinned configuration, migrate, or stop. Repeat with an old cache entry. These tests reveal which components evaluate the flag independently and whether they agree on the intended task boundary.
| Case | Evidence to keep | Decision |
|---|---|---|
| Unknown flag | Resolved default and attempted action | Use the declared bounded fallback |
| Queued task after disable | Pinned state and worker decision | Apply the documented in-flight policy |
| Old candidate cache entry | Cache version and served response | Respect the semantic version boundary |
Retire the flag with an evidence-based decision
Before expansion, compare intended exposure with observed assignments and check that the control path remains usable. Keep missing assignments and unavailable evaluations visible in the denominator. Test a disable operation under realistic queueing so the team knows which work stops immediately and which work needs explicit cancellation or reconciliation.
Give the flag an owner and a removal condition. Once one behavior becomes permanent, remove stale branches through the normal release process rather than leaving an undocumented emergency switch indefinitely. Retain the release record and configuration history so old traces remain explainable after the control itself is removed.
Limits of the evidence
This guide proposes application checks rather than a tested flag-provider comparison. Assignment behavior, context handling, cache design, and in-flight task policy must be verified in the actual deployment; flags do not grant permissions.
Common questions
Is a flag a security control?
Use application authorization for permissions. A flag may determine exposure but should not give an unauthorized caller a protected operation.
Does turning a flag off cancel queued work?
Only if the worker and task policy implement that behavior. Test pending work and committed effects separately.
Sources & further reading
Primary sources behind this briefing. A source’s findings apply to its own study conditions; publication on arXiv does not establish peer review.
- OpenFeature: Evaluation Context OpenFeature · Living reference · Maintained documentationReviewed: targeting key and contextual attributes; application assignment and privacy recommendations are original proposed methods. Accessed October 16, 2026.
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