chore: trim verbose comments/docstrings, add AUTHOR_MAP entry

- Replace 18-line comment block with 3-line invariant statement
- Trim test docstrings from multi-paragraph to single-line summaries
- Trim assertion messages from 4-line to 2-line mismatch reports
- Replace 5-line WHAT comments in stubs with 1-line WHY comments
- Add ziliangdotme@gmail.com -> ziliangpeng to AUTHOR_MAP

agent/background_review.py

@@ -390,24 +390,9 @@ def _run_review_in_thread(
             # parent below so memory(action="add") writes from
             # the review still land on disk; the review just
             # has zero side effects on external providers.
-            # Inherit the parent's toolset configuration so the review
-            # fork's outbound request body has byte-identical ``tools[]``
-            # with the parent's last main-turn request. Without this,
-            # ``enabled_toolsets=None`` defaults to "all registered tools"
-            # and the fork transmits every tool descriptor (including any
-            # the user has disabled via ``hermes tools disable``), while
-            # the parent transmits only its narrower configured set —
-            # making the two requests diverge in ``tools[]`` even though
-            # they share ``messages[0..N]`` and ``system`` byte-for-byte.
-            # Anthropic's prompt-cache key includes ``tools[]``, so any
-            # divergence forks the cache lineage and forces a full
-            # prefix rewrite (~100-200K tokens per turn for long convs).
-            # The post-construction whitelist (``set_thread_tool_whitelist``
-            # below) still restricts which tools the model is allowed
-            # to dispatch — this change only aligns what the request
-            # body transmits, not what the review is allowed to do.
-            # This extends the byte-stability invariant established by
-            # PR #17276 (which fixed ``system``) to ``tools[]``.
+            # Match parent's toolset config so ``tools[]`` is byte-identical
+            # in the request body — Anthropic's cache key includes it.
+            # (The runtime whitelist below still restricts dispatch.)
             review_agent = AIAgent(
                 model=agent.model,
                 max_iterations=16,