feat(plugin): system prompt injection for behavior enforcement #828
Description
Purpose
Inject codingbuddy rules and agent context into Claude's system prompt automatically. Solves the core problem: MCP can only recommend, plugin can enforce.
Changes
packages/codingbuddy-plugin/— Prompt injection module- Auto-inject: active agent's system prompt, mandatory checklists, mode-specific rules
- Auto-dispatch enforcement: when parse_mode returns dispatch:"auto", inject "MUST dispatch these specialists"
Key Enforcement
- Specialist auto-dispatch: 0% → 100% dispatch rate
- Quality gates: cannot skip lint/test before commit
- Mode rules: PLAN/ACT/EVAL behavior strictly enforced
Acceptance Criteria
- codingbuddy rules injected into system prompt at session start
- Active agent context auto-injected on mode change
- dispatch:"auto" triggers MUST-dispatch instruction injection
- Quality gate rules injected as non-negotiable constraints
- Injection configurable (opt-out per rule)