- SharedContext: compressed inter-agent context sharing via put()/get()
over existing CCR compression pipeline. Zero new dependencies.
- README rewrite: lead with "any agent" positioning, not just coding
agents. Add headroom wrap, SharedContext, MCP tools to Quick Start.
Reorder integration table: universal first, coding shortcuts last.
Update compression pipeline references (LLMLingua → Kompress).
- Fix proxy cleanup in headroom wrap: don't kill shared proxy if other
clients are still using it (was orphaning terminals 2-N).
- New docs: docs/shared-context.md
