A max-tokens step that assembled only tool-call blocks appends an
EMPTY-content assistant/message (the usage host). Three consumers each
hand-rolled output selection and all let it erase the child's real
answer: the in-process readResult and the Activation subagent/end
capture took the last message unfiltered, and the SDK backend let any
message beat its streamed-text fallback; the in-process driver also had
no streamed-text fallback for cancelled turns.
dsh-subagent now owns the canonical rule in src/assistant-output.ts
(last non-empty assistant message, else the accumulated text-delta
stream) and all three consumers apply it. Regression tests in all three
packages fail under the previous selections.
Closes#1514
Master's bilingual-generated-docs policy pairs the five generated catalogs;
mirror the purge's regenerated English (ConPTY note, hooks TODO wording,
thinking-format and SurfaceOp JSDoc, doc-graphs templates) into their
reviewed zh sides and re-record. Condense the evidence-citation clause and
raise the docs/AGENTS.md ceiling 1320→1335: master's seam-trio definition
and this PR's review-mandated evidence rule land in the same window.
