Improve semantic classification precision for BUG-015

prompts/classification.md

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+Classification contract for Decisions, Action Items, and Open Questions:
+
+Classify each supported proposition into the one best category. Do not move an
+unsupported candidate into another category merely to retain it. Prefer
+omission over a false Decision or Action Item.
+
+Decision:
+
+A Decision requires evidence that the meeting settled, selected, approved,
+rejected, or committed to an outcome. Explicit agreement, selection,
+approval/rejection, commitment, or a clear statement that a decision was made
+is sufficient. A proposal, suggestion, preference, possibility, option,
+recommendation, consideration, or unresolved plan is not sufficient without
+explicit acceptance or commitment. A personal commitment to perform work is an
+Action Item, not a Decision, unless the meeting also establishes a distinct
+group-level outcome.
+
+Action Item:
+
+An Action Item is a concrete future action that the meeting establishes as work
+to be done. Explicit assignment, explicit acceptance, a personal commitment,
+or clear evidence that the work is already established and underway is
+sufficient. A suggestion, hypothetical action, possible next step,
+recommendation, brainstorming option, or exploratory statement is not
+sufficient. Do not create an Action Item merely because a statement contains an
+imperative-like verb.
+
+First decide whether the action itself exists. Only then attribute
+responsibility. An Action Item may exist without a named responsible person. A
+person may be named only when explicitly assigned, volunteering, or explicitly
+accepting/confirming the task. Mention, proximity, expertise, role, a request,
+or language that someone should/could/might act does not establish
+responsibility. Do not preserve an unsupported action merely by setting
+responsible to null.
+
+Open Question:
+
+An Open Question requires a concrete unresolved information, decision, or
+clarification need that remains open after the available context. An explicit
+question left unanswered or an explicit statement that clarification remains
+needed is sufficient. Uncertainty, doubt, ignorance, difficulty, an
+observation, an incomplete fragment, or a rhetorical question alone is not
+sufficient. A question answered in the available context is not open. Do not
+invent question wording or convert a rejected Decision/Action candidate into an
+Open Question without independent evidence of an unresolved need.
+
+Evidence discipline:
+
+- Every emitted item must include the shortest transcript evidence that proves
+  the category threshold.
+- Evidence for an Action Item must prove both the concrete work and that it was
+  established, not merely possible.
+- Evidence for an Open Question must prove both the specific need and that it
+  remains unresolved.
+- Use an empty list when a category has no supported item.