Prior Work Retrieval

Run this before substantial production only when the trigger above is present. Read-only current-state checks stay direct unless the user asks for history. Its job is not to generate another summary. Its job is to answer: what already exists, which source is current, what should be reused, and what remains genuinely new?

Not for: current-file inspection, ordinary bug fixes, mechanical verification, or a task merely because the final answer happens to be a report/summary. A mention of current/现有 tests, README, files, implementation, behavior, or validation is not by itself a prior-work request. Do not infer the trigger merely because new work might duplicate something — that risk alone does not make a request explicit.

Completion contract

A retrieval pass is complete only when all five are true: