ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter9/hermes-self-evolution/review_task_5.md

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+# Fifth independent review: realistic tool-call placement
+
+The second terminal acceptance review rejected the corrected candidate after
+running all requested checks. Continue the same self-update and address these
+exact findings:
+
+1. In the normal tool loop, the newest durable message is commonly an assistant
+   tool-call message whose `content` is `None` or empty, followed by a tool
+   result. The current backward search selects that assistant message, then
+   fails closed because its content is unsupported. The model-visible status is
+   therefore absent during common tool-loop requests.
+2. The current test uses assistant tool-call messages with ordinary string
+   content, so it does not cover the production shape above.
+3. If the assistant tool-call message does have text, the current code appends
+   status before the following tool result instead of at the request context
+   end. This violates the book/report placement requirement that current
+   model-visible state be closest to generation.
+
+Implement a durable solution at the actual string-only persistence/replay
+boundary. It may extend string `api_content` sidecar replay to tool messages if
+that is supported by the state and flush contracts, but must not widen the
+database type, mutate clean transcript content, disturb role/tool-call ordering,
+or attach status to unsupported list/multimodal content. Inspect and test the
+real production contract rather than relying on a permissive test helper.
+
+Add coverage for an assistant tool call with `content=None` followed by a
+string tool result, across at least three successive requests. Assert both
+byte-identical historical replay and placement after the newest tool evidence.
+Retain the adversarial output-bound test.
+
+Run the focused tests, existing sidecar/cache/turn-context regressions,
+compilation, and `git diff --check`. Update `BOOK_SELF_EVOLUTION_REPORT.md` with
+this fifth review and exact results. Do not edit the book, commit, push, or
+claim downstream task improvement.