- 2-attempt short-backoff retry for GETs and the read-only
POST /query/* and /rag/search endpoints only; wiki writes are never
retried (duplicate-page risk)
- honor the defined-but-ignored LIBRARY_DESK_TIMEOUT config instead of
hardcoded 60s/30s per-call values
- hold ONE shared httpx.AsyncClient per librarian run via
library_client_session (contextvar), instead of constructing a
client per tool call; nested sessions are no-ops and custom targets
still get their own client
- read tools raise ModelRetry on transient HTTP errors (transport
errors, 5xx, 429) so Agent(retries=2) engages; write tools keep
returning safe failure messages
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>