fix(MOC-153): catalog 写非空 base_instructions 修第三方切真 GPT 400#419
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第三方模型起步的会话切真 GPT 后报 400 `Instructions are required`。根因: transfer 给 Codex model catalog 每个 entry 写空串 `base_instructions`,Codex 在会话创建时把它冻结进 session_meta;之后切真 GPT 直连 chatgpt.com(不经 proxy), OpenAI Responses 后端硬校验顶层 instructions 非空 → 400。真 GPT 不经 proxy, 只能让会话出生即带非空 base_instructions。 - registry 新增共享常量 CAS_BASE_INSTRUCTIONS(写入/剥离两端 single source of truth) - model_catalog.rs 给每个 catalog entry 写该非空值(替代旧 "") - responses/request.rs adapter 对第三方请求精确剥离该 sentinel,第三方行为字节级不变 - 4 单测(catalog 非空 / 第三方剥离 string+object / 非 sentinel 不误剥) - README FAQ + CHANGELOG 同步 2026-06-07 isolated `codex exec` 真机实测坐实:catalog base_instructions 原样冻结进 session_meta(空→空 / 非空→非空)。 Refs MOC-153
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#419(catalog base_instructions 路线)采纳了 @Alpaca233114514 在 #396/#398 里 的 MOC-153 贡献:第三方切 GPT 报 `Instructions are required` 400 的根因诊断 (顶层 instructions 空)+ 注入非空 instructions 的核心思路。#419 已 squash-merge 进 main、无法 amend,故在此 follow-up commit 以 Co-Authored-By 形式署名。 Co-Authored-By: ALPACA LI <alpaca8570@outlook.com>
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#419(catalog base_instructions 路线)采纳了 @Alpaca233114514 在 #396/#398 里 的 MOC-153 贡献:第三方切 GPT 报 `Instructions are required` 400 的根因诊断 (顶层 instructions 空)+ 注入非空 instructions 的核心思路。#419 已 squash-merge 进 main、无法 amend,故在此 follow-up commit 以 Co-Authored-By 形式署名。 Co-Authored-By: ALPACA LI <alpaca8570@outlook.com>
Cmochance
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Jun 7, 2026
#419(catalog base_instructions 路线)采纳了 @Alpaca233114514 在 #396/#398 里 的 MOC-153 贡献:第三方切 GPT 报 `Instructions are required` 400 的根因诊断 (顶层 instructions 空)+ 注入非空 instructions 的核心思路。#419 已 squash-merge 进 main、无法 amend,故在此 follow-up commit 以 Co-Authored-By 形式署名。 Co-authored-by: ALPACA LI <alpaca8570@outlook.com>
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问题
第三方模型(MiniMax / MiMo 等)起步的会话切换到真 GPT(
gpt-5.5)后发消息,Codex 内联报 400Instructions are required、对话卡死。根因(真机实测坐实)
transfer 给 Codex
model_catalog_json每个 entry 写base_instructions: ""。Codex 在会话创建时把它冻结进session_meta.base_instructions、跨 resume 不重解析(isolatedcodex exec实测:catalog 写什么字符串 session_meta 就原样冻结)。第三方会话起步顶层 instructions 一直空;之后切真 GPT 直连 chatgpt.com 不经 proxy,OpenAI Responses 后端硬校验顶层 instructions 非空 → 400。真 GPT 不经 proxy → 唯一可行修法是让会话出生即带非空 base_instructions。改动
registry:新增共享常量CAS_BASE_INSTRUCTIONS(写入/剥离两端 single source of truth)。model_catalog.rs:每个 catalog entry 写该非空值(替代旧"")。responses/request.rs:adapter 对第三方请求精确剥离该 sentinel,第三方对话行为不变。用户影响
废弃 #418
#418 是方向 B(在
/backend-apipassthrough 注入),前提"GPT 经 transfer"被用户场景"停 transfer 切真 GPT"证伪(真 GPT 直连、proxy 够不着)。本 PR 取代之,#418 将关闭。详细排查记录见 Linear。Refs MOC-153