Function processRemoteEvalPayload

src/services/analytics/growthbook.ts:327–394

* Process a remote eval payload from the GrowthBook server and populate * local caches. Called after both initial client.init() and after * client.refreshFeatures() so that _BLOCKS_ON_INIT callers see fresh values * across the process lifetime, not just init-time snapshots. * * Without this run

(
  gbClient: GrowthBook,
)

 * kill switch for long-running sessions.
 */
async function processRemoteEvalPayload(
  gbClient: GrowthBook,
): Promise<boolean> {
  // WORKAROUND: Transform remote eval response format
  // The API returns { "value": ... } but SDK expects { "defaultValue": ... }
  // TODO: Remove this once the API is fixed to return correct format
  const payload = gbClient.getPayload()
  // Empty object is truthy — without the length check, `{features: {}}`
  // (transient server bug, truncated response) would pass, clear the maps
  // below, return true, and syncRemoteEvalToDisk would wholesale-write `{}`
  // to disk: total flag blackout for every process sharing ~/.claude.json.
  if (!payload?.features || Object.keys(payload.features).length === 0) {
    return false
  }

  // Clear before rebuild so features removed between refreshes don't
  // leave stale ghost entries that short-circuit getFeatureValueInternal.
  experimentDataByFeature.clear()

  const transformedFeatures: Record<string, MalformedFeatureDefinition> = {}
  for (const [key, feature] of Object.entries(payload.features)) {
    const f = feature as MalformedFeatureDefinition
    if ('value' in f && !('defaultValue' in f)) {
      transformedFeatures[key] = {
        ...f,
        defaultValue: f.value,
      }
    } else {
      transformedFeatures[key] = f
    }

    // Store experiment data for later logging when feature is accessed
    if (f.source === 'experiment' && f.experimentResult) {
      const expResult = f.experimentResult as {
        variationId?: number
      }
      const exp = f.experiment as { key?: string } | undefined
      if (exp?.key && expResult.variationId !== undefined) {
        experimentDataByFeature.set(key, {
          experimentId: exp.key,
          variationId: expResult.variationId,
        })
      }
    }
  }
  // Re-set the payload with transformed features
  await gbClient.setPayload({
    ...payload,
    features: transformedFeatures,
  })

  // WORKAROUND: Cache the evaluated values directly from remote eval response.
  // The SDK's evalFeature() tries to re-evaluate rules locally, ignoring the
  // pre-evaluated 'value' from remoteEval. setForcedFeatures also doesn't work
  // reliably. So we cache values ourselves and use them in getFeatureValueInternal.
  remoteEvalFeatureValues.clear()
  for (const [key, feature] of Object.entries(transformedFeatures)) {
    // Under remoteEval:true the server pre-evaluates. Whether the answer