v3.6.15

Fixed

• MCP crash: "Cannot read properties of undefined (reading 'invoke')" — Identified and fixed 4 distinct crash vectors that caused intermittent MCP server death on v3.6.14 (#271):
  • 5 Mutex::lock().unwrap() calls in the MCP request hot path (list_tools, active_tool_defs, ctx_load_tools) replaced with graceful fallbacks that degrade instead of crashing
  • memory_guard hard process::exit(137) replaced with 3-attempt eviction loop — server now aggressively reclaims memory but never hard-exits
  • Nested block_in_place in bounded_lock eliminated to prevent Tokio blocking-pool exhaustion under concurrent tool calls
  • CSPRNG expect() in dashboard nonce/token generation replaced with time-based fallback
• parse().unwrap() for SocketAddr in 2 dashboard routes replaced with direct SocketAddr::new() construction
• tempfile().expect() in ctx_execute replaced with graceful error return

Changed

• Dashboard: modular route architecture — Monolithic context.rs (617 lines) and graph.rs (364 lines) split into focused sub-modules (context/{core,overlay,diagnostics,aggregated}.rs, graph/{deps,callgraph,analysis}.rs)
• Dashboard: API consolidation — 3 new aggregated endpoints (/api/context-summary, /api/context-capabilities, /api/context-history) reduce parallel fetches from 18 to 11 in the Context Manager view
• Dashboard: shared frontend utilities — Extracted common rendering logic (gauges, formatters, path shortening) into lib/shared.js; TTL-cached API layer in lib/api.js with event-based data broadcasting
• Dashboard: removed dead code — Deleted legacy dashboard.html (3057 lines) and CockpitContextLayer component

Added

• Context Commander — New action-oriented dashboard component with context pressure visualization, budget bands, and risk analysis
• Configurable proxy timeout — LEAN_CTX_PROXY_TIMEOUT_MS env var / proxy_timeout_ms in config.toml (default: 200ms) (#270)
• Dynamic tool categories — LCTX_DEFAULT_CATEGORIES env var / default_tool_categories in config.toml to control which tool categories are active by default
• Global degradation disable — LCTX_NO_DEGRADE=1 env var / no_degrade = true in config.toml to globally disable all read mode degradation

Upgrade

lean-ctx update                 # recommended (auto-downloads + refreshes shell hooks)
cargo install lean-ctx          # or
npm update -g lean-ctx-bin      # or
brew upgrade lean-ctx

Note: After upgrading via cargo/npm/brew, run lean-ctx setup to refresh shell aliases. lean-ctx update does this automatically.

Full Changelog: v3.6.15...v3.6.15