Example 27: Feature Flags & Progressive Delivery (OpenFeature + flagd)

[patterncatalyst]

Chapter

_docs/27-appendix-n-feature-flags.md — Feature Flags & Progressive Delivery

Example Path

examples/27-feature-flags/

What to demonstrate

• Four flag types (release, ops, experiment, permission)
• OpenFeature SDK evaluation with flagd
• Targeting and sticky-bucketed percentage rollouts
• Kill switch pattern
• Flag lifecycle discipline

Stack

• Infra: Podman — flagd + LGTM
• Language: Go (OpenFeature Go SDK) or Python
• Priority: Medium
• Depends on: Add flagd to lgtm-podman-stack for feature flag examples #5 (flagd infra)

Deliverables

• compose.yaml (with flagd)
• Service using OpenFeature SDK
• Flag config YAML
• README.md
• verify.sh
• Flip chapter footer to verified