v3.9.7

Added

• Runtime tools/list_changed notifications (GH #1250).
  When the user changes tool_profile, tools_enabled, or disabled_tools
  via dashboard, CLI, or manual config edit, the MCP server now automatically
  sends a notifications/tools/list_changed to the IDE client on the next
  tool call. No more "restart IDE to pick up profile changes" — Cursor,
  Claude Code, and all MCP clients refresh their tool surface immediately.
  New module: server/tools_config_watch with hash-based change detection.
• CLI profile-switch messaging updated.
  lean-ctx tools <profile> now prints "Changes take effect on the next
  tool call (auto-detected)" instead of "Restart your AI tool / IDE".

Fixed

• lean-ctx index build memory explosion capped (GH #790).
  Six fixes that together prevent unbounded RAM growth during index builds:
  1. Memory Guardian activated for CLI builds — start_guard() now runs
     before ensure_all_background(), so pressure/abort checks in graph and
     BM25 code actually fire (previously only started in daemon mode).
  2. graph_index_max_files default 0 → 15 000 — caps the graph scan;
     override with graph_index_max_files = 0 for unlimited.
  3. Graph content_cache capped at 256 MB — stops caching file contents
     once the budget is hit; the edge builder falls back to disk reads.
  4. Edge build batched (500 files/batch) — par_iter(ALL) replaced with
     chunked parallel batches and memory-pressure checks between them.
  5. BM25 chunk content truncated to 10-line snippets during build — full
     text is tokenised for scoring, then the stored body is snipped immediately
     (no more holding every file's full content in the chunk vector).
  6. BM25 save streams through zstd — postcard::to_allocvec replaced with
     postcard::to_io → zstd::Encoder → temp file; eliminates the
     intermediate uncompressed Vec<u8> allocation entirely.
• Cursor Read redirect removed — savings jump from 9.5 % to 73+ % (GH #1250).
  Cursor's StrReplace internally triggers a native Read that the
  redirect hook intercepted, producing verbatim cli_full output with
  ~0.5 % savings. This dominated the token stats (68 % of all input tokens!)
  and dragged the overall savings rate to single digits. The Read matcher
  is now removed from Cursor's preToolUse redirect hook — native Reads
  pass through unmodified (StrReplace works), and the agent uses ctx_read
  (MCP) for compressed reads, matching how Claude Code already works
  (read_redirect = auto). Grep redirect remains for compression.

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: v3.9.7...v3.9.7