v0.25.3

Fixed

• Capture no longer dies silently when the OS purges the model cache. fastembed
  defaults its ONNX cache to tempfile.gettempdir(); on macOS that directory is purged
  on a timer. The purge removes the small config/tokenizer blobs first and leaves the
  snapshot's symlinks dangling, so every model load then fails with
  Could not find config.json.

  The damage was invisible in two separate ways: cairn sweep crashed outright — and
  the plugin's capture hook sent its output to /dev/null, so sessions could go
  uncaptured for weeks with no error anywhere — while recall appeared to keep working
  because it silently fell back to BM25-only, quietly losing semantic retrieval.

  agentcairn now pins the cache to a persistent directory it owns
  (~/.cache/agentcairn/models, beside the index) for both the embedder and the
  cross-encoder reranker. An explicit FASTEMBED_CACHE_PATH still wins.

Changed

• cairn doctor now verifies the embedder actually loads and fails with a PROBLEM
  when it does not. A healthy index never implied a healthy model: the index is a static
  file, the model is a cache that can rot long after it was built. Doctor previously
  reported status: OK while capture was dead and recall was degraded.
• The capture hook keeps its output in ~/.cache/agentcairn/logs/capture.log
  (truncated per run) instead of discarding it, so a failing sweep leaves a trace.
  Claude Code plugin 0.4.2, Codex plugin 0.1.4.

If capture has been quiet for you, upgrade and run cairn doctor — it will now tell
you the truth. A single cairn sweep re-distills any sessions whose transcripts are
still on disk, so a backlog is usually recoverable rather than lost.