Govern canon changes: require explicit reason/impact/retroactive policy, and produce an actionable propagation plan.
Turn "AI draft -> author edits" diffs into structured deviation items, an author-intent prompt, and a concrete propagation plan.
Help the author write narrative unit tests (rules/constraints) and interpret failures with a concrete fix roadmap.
Simulate multiple reader personas to score a chapter (爽点/困惑/信息负荷) and propose actionable alternatives.
Manage rewrite branches: when to branch, how to compare, and how to merge back with minimal chaos.
Maintain a structured Setup/Payoff ledger (promises, debts, payoffs) and generate a payoff roadmap.
Define what the Story Control Panel shows, how to compute signals, and how the author should act on alerts.
Aggregate a writing session into a readable log + a reusable author-intent prompt.