---
type: system
project: fidelity
status: active
systems: []
workstreams: []
people: []
related: []
tags:
  - system
  - fidelity
updated: 2026-04-20
---

# LaunchDarkly

## Role

- LaunchDarkly is the feature-flag platform used broadly in the Fidelity workflow.
- It is part of the normal delivery path for controlled rollout, environment-specific behavior, and gradual activation of changes.

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## Stable Patterns

- LaunchDarkly can affect behavior by environment, context, targeting, timing, and cached flag state.
- When a bug appears only on certain builds or devices, LaunchDarkly evaluation is a valid investigation path even if local simulator checks look correct.
- Missing direct dashboard access does not remove LaunchDarkly from consideration; code-side evidence, payload inspection, and runtime evaluation still matter.

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## Current Example

- During the April 20, 2026 REST migration investigation, LaunchDarkly was a central part of the debugging path because the behavior differed between local validation and consumer real-device reports.

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## Risks

- Do not assume a simulator result fully represents real-device LaunchDarkly behavior.
- Do not treat missing direct Flagship dashboard access as proof that LaunchDarkly is not involved; indirect evidence still matters.

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## Related Context

- `workspaces/fidelity/project-knowledge/02-work-items/pdiap-15838.md`