claude

qa-feature-flags

Feature-flag and experimentation testing: LaunchDarkly and OpenFeature SDK tests, flag test matrices, A/B test validity, and experiment result analysis. Covers Unleash, Flagsmith and GrowthBook through OpenFeature, and hermetic harnesses for Statsig, Optimizely, Split.io, Amplitude Experiment and VWO. Agents (flag-coverage-gap-detector, stale-flag-detector, sample-ratio-mismatch-detector) find untested flag branches, stale flags, and sample ratio mismatch. Distinct from qa-test-environment/feature-flag-test-harness and qa-shift-right/feature-flag-experiment-validator.

13 on GitHubby testlandv1.7.3MITupdated yesterdayintegrations-protocols
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Plugin qa-feature-flags from marketplace testland-qa in testland/qa. Commands read from the repo's manifest — today.

What it installs

Skills (5)

  • ab-test-validity-checklist

    Use when launching, auditing or governing an A/B test or online experiment design. Builds a per-experiment checklist and sign-off: pre-registered metric, power and guardrails, randomization unit and sample ratio mismatch checks, assignment, telemetry, peeking rules and novelty effects.

  • experiment-results-interpreter

    Use for any question about reading an A/B test or experiment result, including quick ones: is it significant, should we ship variant B, why a week-one win faded. Computes significance per metric with multiple-comparison correction, reads confidence intervals, and checks novelty, interactions, Simpso

  • experiment-sdk-testing

    Use when code instrumented with Statsig, Optimizely, Split.io (Harness FME), Amplitude Experiment or VWO needs tests. Initializes the SDK offline from a committed config fixture, pins each test to an arm and checks assignment integrity, with per-vendor references.

  • launchdarkly-testing

    Use whenever code that reads LaunchDarkly feature flags needs tests: the TestData source for hermetic tests with no network, file-based fixtures, per-test flag overrides and assignment checks. Which flag combinations to cover is in openfeature-sdk-testing's flag test-matrix reference.

  • openfeature-sdk-testing

    Use whenever code that reads feature flags through OpenFeature, Unleash, Flagsmith or GrowthBook needs tests: InMemoryProvider for hermetic tests, evaluation details, hooks and targeting context in TypeScript, Java and Python, plus a flag test-matrix workflow. LaunchDarkly has launchdarkly-testing.

Subagents (3)

  • flag-coverage-gap-detector

    Use proactively after a feature flag is added or changed. Finds flag evaluation call sites whose off path, fallthrough path or non-default variants no test exercises, and ranks the untested branches. Finding flags to remove is stale-flag-detector.

  • sample-ratio-mismatch-detector

    Use proactively at the end of an A/B test before any ship decision, or when results look surprising. Runs a chi-square test on observed vs expected allocation and, when there is a sample ratio mismatch, lists the likely causes such as logging bugs, bot filtering, redirects or randomization bugs.

  • stale-flag-detector

    Use proactively for a monthly or quarterly feature-flag debt audit, or before a major refactor. Finds flags at 100% rollout, untouched kill switches, shipped experiments and orphan flags, ranks them for removal and gives a safe removal runbook for each.

View source on GitHub testland.io

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