V5.3-r3 human-calibrated rubric / 人工校准评分细则

[yyuan308]

Summary / 概要

• Adds a separately versioned V5.3-r3 Linear Algebra development candidate after course-owner calibration. It does not rewrite the frozen V5.3-r2 draft.

• Encodes explicit error-depth anchors, independent final-result points, equivalent symbolic-expression handling, independent Q3 bonus handling, and an explicit Q3 fundamental-method scoring gate.

• Updates mirrored grading skills so an incorrect independently allocated final result does not retain final-result points merely because a prior local error caused it. No-double-counting still protects dependent process criteria.

• Adds strict validation that a scoring-gate trace uses the declared gate, cap, deduction type, and no extra deductions.

• 新增独立版本化、经课程负责人校准的 Linear Algebra V5.3-r3 开发候选；不会改写已冻结的 V5.3-r2 草案。

• 将按错误深度的分值锚点、最终答案独立分、符号表达式等价、独立 Q3 bonus 和 Q3 基础方法错误门槛写入可执行 rubric。

• 同步 Codex/Claude 通用评分 skill：错误的独立最终答案不因上游局部错误而保留答案分；不重复扣分仍保护依赖性的过程分。

• 新增严格校验：scoring-gate trace 必须使用已声明的 gate、分数上限、扣分类型，且不得混入其他扣分。

Tests / 测试

• Targeted public tests: 31 passed.

• Full public core suite completed without a reported failure.

• Static rubric validation passed for the new execution-contract rubric.

• 定向公共测试：31 项通过。

• 完整公共 core 测试已完成，未报告失败。

• 新 execution-contract rubric 的静态校验通过。

Privacy and limits / 隐私与限制

• No Data files, student work, identities, transcripts, per-student gold, raw outputs, or private locations are staged.

• This PR contains no private gold revision, packet, model call, metric, heldout access, or production/teacher-replacement claim.

• The r3 plan requires separate explicit authorization before private development-gold revision, packet construction, or any model run.

• 暂存内容不含 Data 文件、学生作答、身份、转录、逐人 gold、原始输出或私有位置。

• 本 PR 不包含私有 gold 修订、packet、模型调用、指标、留出集访问，也不作生产可用或教师替代声明。

• r3 计划要求：私有开发集 gold 修订、packet 构建和任何模型运行都必须另行获得明确授权。

Next step / 下一步

After review and merge, decide separately whether to authorize a new private development-only gold revision. Only after that can a matched G1 packet and the authorized Codex plus DeepSeek V4 Flash development comparison be prepared; heldout remains sealed.

审查并合并后，请单独决定是否授权新的私有开发集 gold 修订。仅在此之后才可准备同一份 G1 packet 并开展获授权的 Codex 与 DeepSeek V4 Flash 开发集比较；留出集继续封存。