Function update

packages/opencode/src/storage/storage.ts:280–294

(key: string[], fn: (draft: T) => void)

      })

    const update: Interface["update"] = <T>(key: string[], fn: (draft: T) => void) =>
      Effect.gen(function* () {
        const value = yield* withResolved(key, (target, rw) =>
          TxReentrantLock.withWriteLock(
            rw,
            Effect.gen(function* () {
              const content = yield* wrap(target, fs.readJson(target))
              fn(content as T)
              yield* writeJson(target, content)
              return content
            }),
          ),
        )
        return value as T
      })

    const write: Interface["write"] = (key: string[], content: unknown) =>
      Effect.gen(function* () {