Graphenium v0.15.0: Parser resilience, planning workspaces, composite tools

Graphenium v0.15.0

Parser resilience, planning workspaces, composite orientation tools.

New MCP tools

• references_to — structural reference lookup (containers, imports, inheritance)
• explain_change — composite pre-edit orientation (hierarchy + community + callers + files)
• create_planning_workspace — virtual planning workspace
• add_planned_symbol — registers intended symbols and links them to existing nodes
• get_plan_details — returns full planning workspace subgraph

New CLI

• gm explain <symbol> — single-turn architectural orientation
• gm check --plan <id> — planning workspace compliance verification

Key improvements

• Parser failure logging, C# regression test, language integrity check in gm doctor
• format_safe_diff truncation (500-change budget), AST-only blast radius warnings
• Fuzzy symbol resolution, CPython noise filter, namespace-aware module_dependencies
• plan_id schema extension on Node/Edge for planning workspace compliance
• Windows backslash path normalization

Verification

• Integration test: planning workspace lifecycle (tests/planning_bench.rs)
• 350 tests across all modules