analyze-sibling-paper 是做什么的？
Deep-analyze a specific related / competing / concurrent paper — reading the ACTUAL paper, not its abstract — to decide the "isn't this just X?" question before a reviewer asks it: what it really does, whether it's prior or concurrent work, the strongest scoop a reviewer could claim, whether your delta is REAL or merely cosmetic, and the exact cite + positioning clause (or a scoop escalation) to apply. Saves the analysis to the paper's research folder and surfaces action points. Use whenever a paper close enough to yours surfaces — via verify-citations' nearest-neighbor, a reviewer's "this was already done", your own lit search, or an arXiv alert. Distinct from verify-citations (confirms a cite is real + one-line delta) and study-accepted-papers (mines a venue's accepted corpus for levers); this one does the deep per-competitor overlap/scoop analysis. Compose with verify-citations (feeds it neighbors), harden-paper (its nearest-neighbor-scoop axis calls this), and extend-paper (a scooped angle can become the