0.9.0 — agent-maintainability + AGENTS.md conformance
Agent-maintainability wave (shell detection, blast-radius, localize, repo-map, context discipline, assess) + vendor-neutral AGENTS.md conformance (ADR 0001). Fresh-install e2e + research-backed roadmap. Deferred (not stubbed): MCP + SCIP. See CHANGELOG [0.9.0].