context-engine

# context-engine ## Purpose Context window management for long sessions. Detects when context is approaching limits, triggers smart compaction preserving critical decisions and progress, and coordinates with session-bridge to save state before compaction. Prevents the common failure mode of losing important context mid-workflow. ### Behavioral Contexts Context-engine also manages **behavioral mode injection** via `contexts/` directory. Three modes are available: | Mode | File | When to Use | |------|------|-------------| | `dev` | `contexts/dev.md` | Active coding — bias toward action, code-first | | `research` | `contexts/research.md` | Investigation — read widely, evidence-based | | `review` | `contexts/review.md` | Code review — systematic, severity-labeled | **Mode activation**: Orchestrators (cook, team, rescue) can set the active mode by writing to `.rune/active-context.md`. The session-start hook injects the active context file into the session. Mode switches mid-session are supported — the orchestrator updates the file and references the new behavioral rules. **Default**: If no `.rune/active-context.md` exists, no behavioral mode is injected (standard Claude behavior). ## Triggers - Called by `cook` and `team` automatically at context boundaries - Auto-trigger: when tool call count exceeds threshold or context utilization is high - Auto-trigger: before compaction events ## Calls (outbound) # Exception: L3→L3 coordination - `session-bridge` (L3): coordinate ...