Function withoutHostManagedProviderVars

src/utils/managedEnv.ts:45–59

* When the host owns inference routing (sets * CLAUDE_CODE_PROVIDER_MANAGED_BY_HOST in spawn env), strip * provider-selection / model-default vars from settings-sourced env so a * user's ~/.claude/settings.json can't redirect requests away from the * host-configured provider.

(
  env: Record<string, string> | undefined,
)

 * host-configured provider.
 */
function withoutHostManagedProviderVars(
  env: Record<string, string> | undefined,
): Record<string, string> {
  if (!env) return {}
  if (!isEnvTruthy(process.env.CLAUDE_CODE_PROVIDER_MANAGED_BY_HOST)) {
    return env
  }
  const out: Record<string, string> = {}
  for (const [key, value] of Object.entries(env)) {
    if (!isProviderManagedEnvVar(key)) {
      out[key] = value
    }
  }
  return out
}

/**
 * Snapshot of env keys present before any settings.env is applied — for CCD,