Release 0.9.5 - Fix context compression via sub-agent Context compression now works correctly: - Sub-agent receives prompt via shell pipeline (printf | codemax --sub-agent) - Parses Summary: prefix from stop tool output - Falls back to KEY EVENTS: pattern Also includes: - SystemPromptBuilder class (not yet integrated) - docs/Modes_Flags.md - tests/test_messages.cpp All 16 tests pass.