[rudycelekli]

Successful fetches currently keep an existing search preview in url_content because record_fetch uses setdefault. A docs answer can therefore save the short preview as its cited evidence even after the agent reads the full page. Replace the stored preview with the successfully fetched document text while keeping reader references out of engine_pool.

Validation:

• Independent synthetic contract oracle: Actual Controller search→fetch call path: short preview is replaced by full fetched page; failed fetch preserves prior evidence and search accounting stays unchanged.
• Exact upstream baseline: 1 failing / 1 passing focused tests. Fixed branch: full repository suite 134 passing.
• PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 /opt/homebrew/bin/python3.11 -m pytest -q and git diff --check pass.

No model/provider calls or private data. Agent loop, tool gate, depth cap, scoring rules, and denominator are unchanged.