---
type: User Story
title: "US-011: Configure and persist progression"
description: Give operators validated configuration and durable, defensive storage for all base progression behavior.
status: done
---

# US-011: Configure and persist progression

As a **server operator**, I want progression behavior to be configurable and durable so that the plugin remains predictable across restarts and server changes.

## Acceptance criteria

- [x] Configuration supports all qualifying materials, progression thresholds, radii, vertical flight limits, warning-buffer distance, warm-ups, cooldowns, prices, particle settings, and notification durations.
- [x] Default values match the progression requirements documented by the related user stories.
- [x] Thresholds and levels are validated as nonnegative, representable, and sequentially coherent where required.
- [x] Radii, vertical ranges, durations, and prices reject unsafe or nonsensical values.
- [x] Invalid required configuration prevents partial plugin initialization and produces a clear server log message.
- [x] UUID-keyed state persists latest known names, base locations, counters, levels, relocation times, teleport times, visitor cooldowns, navigation preferences, flight preferences, boss-bar preferences, and visitor settings.
- [x] Cooldowns and relocation limits use real elapsed timestamps and continue while players are offline.
- [x] State is saved safely so a failed write does not replace valid persisted state with a partial document.
- [x] Corrupt, unknown, or invalid records are handled defensively and cannot silently grant progression or privileges.
- [x] Unknown forward-compatible configuration and state fields are preserved where practical.

## Related

- [US-001: Unlock and establish Base I](us-001-unlock-and-establish-base.md)
- [US-003: Expand the base](us-003-expand-the-base.md)
- [US-010: Administer player progression](us-010-administer-player-progression.md)
- [US-012: Build and release the plugin](us-012-build-and-release-plugin.md)