Files
hermes-agent/tests
kshitij ebf967ff2c polish(mcp): simplify-pass folds on the lazy-startup salvage
Five review findings folded:
- schema cache writes via utils.atomic_json_write (fsync; was bare
  tmp+replace), file moved to cache/mcp_schema_cache.json with 0o600
  (sibling precedent: registry discovery cache)
- phantom-tool reconciliation: after a lazy server's first-use connect,
  cached tools the live server no longer offers are deregistered (were
  permanent registry ghosts burning circuit-breaker strikes on every
  'Unknown tool' round-trip); stale fingerprint logged
- cache-load path now runs _scan_mcp_description like the eager path
  (cache file is user-writable JSON; defense-in-depth)
- write-through skips the disk rewrite when the entry is unchanged
  (a flapping stdio server was rewriting byte-identical JSON per
  revival)
- _lazy_server_fingerprints no longer write-only dead state (consumed
  by the reconciliation logging)

444 mcp tests green (440 pre-fold + 4 new guards); phantom-dereg and
write-skip mutation-checked.
2026-08-03 14:24:37 +05:30
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