dsh-error-improvement: Transforming User-Confirmed Experience into Persistent Agent Memory

The `dsh-error-improvement` plugin is designed to address the problem of agents repeatedly making mistakes in DeepSeek Harness by enhancing robustness through persistent memory mechanisms. It operates independently of external services, using pure file-based storage to convert agent execution results into persistent memories. Its core workflow includes monitoring errors and generating drafts that require mandatory user confirmation in Settings before taking effect; offering Assist, Strict, and Off injection modes; detecting repeated errors and enforcing interception; and promoting validated recipes into skills. All data is stored locally, must be enabled through profile configuration, and is suitable for agent development scenarios requiring long-term memory and high reliability.