DeepSeek Harness Plugin: agent-discipline

`agent-discipline` is an engineering constraint plugin for DeepSeek Harness, designed to translate HARNESS-METHODOLOGY into executable code constraints. By injecting prompt segments, providing scaffolding tools, and enforcing compliance audits, it establishes an automated discipline system for AI Agent development. It implements Form C’s strict state folding and event sourcing mechanism, ensuring that session logs are the source of truth for state, and provides initialization, auditing, and self-attestation capabilities, suitable for teams with high requirements for engineering standards and repository state management.