claw-ctx v6.6.0: Context Efficiency Metrics

v6.6.0 (2026-08-14)

Added

• Context Efficiency Metrics (src/efficiency/): measure compaction effectiveness and context budget utilization, the observational foundation for future adaptive thresholds
  • ContextEfficiencyMetrics — records utilization (currentTokens / effectiveBudget), waste (compactionDeltaRate + triggerGap), and cache-hit-rate correlation
  • EfficiencyReport — per-session (getSessionReport) and cross-session (getAggregateReport) aggregation
  • Integrated into ProactiveCompactionController via injectable metrics (pure observation, zero decision impact)

Changed

• Version: 6.5.1 → 6.6.0

Tests

• 92 files / 1172 tests / 5 skipped / 0 failed (Edith independent QC APPROVED; integration semantics zero-change 10/10)