Function planFlag

planFlag(
    explicit: string | null | undefined,
    envValue: string | undefined,
    paidDefault: boolean,
    env?: PlanEnv,
): boolean
Resolves a per-plan boolean through the override chain.

An empty string defers rather than reading as false: url.searchParams.get() returns '' for ?prefill=, and a stray ampersand must not switch behaviour off.
Parameters
- explicit: string | null | undefined
  the most specific signal, usually a request parameter; '' and null defer
- envValue: string | undefined
  an environment override; same three values defer
- paidDefault: boolean
  what the paid plan gets when nothing overrides
- Optionalenv: PlanEnv
  the environment carrying PLAN
Returns boolean
- Defined in src/ops/plan.ts:67