Merge pull request #1977 from deepseek-harness/worktree/pi-ai-per-model-reasoning

feat(llm-pi-ai): per-model reasoning efforts, dialect switches, and modelOverrides in settings.yaml

.agents/notes/implemented/feature/2026-08-08-pi-ai-per-model-reasoning-declarations.i18n.yaml

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+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# side as of the last confirmed-consistent state. Both languages carry equal authority;
+# after editing either side, bring the other along and re-record with:
+#   pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-08-08-pi-ai-per-model-reasoning-declarations.md
+2026-08-08-pi-ai-per-model-reasoning-declarations.md: b6264feeb724e3693078fa3fc3e3fc16ed01aacb
+2026-08-08-pi-ai-per-model-reasoning-declarations.zh.md: 1b30f7e0c42974c777a535e133a47caa217e2e5e

.agents/notes/implemented/feature/2026-08-08-pi-ai-per-model-reasoning-declarations.md

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+# Agent Note: Per-Model Reasoning Declarations in llm-pi-ai
+
+Status: implemented
+
+English | [中文](2026-08-08-pi-ai-per-model-reasoning-declarations.zh.md)
+
+## Problem
+
+Under the declared-provider catalog ([[2026-08-03-pi-ai-declared-provider-catalog]], which deliberately kept reasoning out of the configurable fields), a hand-declared pi-ai route's models materialized with `reasoning: false`, so `getSupportedThinkingLevels` short-circuited to `["off"]`: the composer offered no effort picker for them, and the route-level `reasoning` default — the only reasoning knob a profile had — made every request to such a model fail with `UNSUPPORTED_REASONING_EFFORT` before network I/O. The same route-level knob was also the wrong altitude for catalog routes: one provider's models disagree about which levels they accept (deepseek ships `[off, high, max]` beside catalog models with `xhigh`), so a single per-route level could not be set without breaking part of the route, which is why the Models page stopped writing it entirely (#1860) and left `settings.yaml` with no way to align efforts per model.
+
+Two adjacent gaps compounded this. pi-ai decides the reasoning *wire dialect* (`compat.thinkingFormat`, `compat.supportsReasoningEffort`) by recognizing the endpoint URL, and a private gateway's URL says nothing — a DeepSeek-dialect gateway was spoken to in the OpenAI dialect with no configuration that could correct it. And the only way to touch one catalog model was the `models` list, which *replaces* the served catalog: narrowing `gpt-5`'s levels meant restating all thirty-eight openai models or silently dropping thirty-seven.
+
+## Decision
+
+`PiAiModelProfile` gains `reasoningEfforts`: **each key is a level selectors offer, its value the spelling dispatch sends on the wire**. The declaration translates to pi-ai's `Model.reasoning` + `thinkingLevelMap` with all seven levels decided explicitly — declared levels carry their wire value, undeclared levels are pinned `null` — so the profile author never needs pi-ai's asymmetric defaulting rule (absent means "supported" for the five base levels but "unsupported" for `xhigh`/`max`). `off` is the one three-state key: left out, no Off is offered and an explicit Off request is refused (an effortless request still goes out bare, leaving the provider its default); declared valueless, Off is offered and dispatch sends nothing (the `deepseek` dialect sends `thinking: {type: "disabled"}`); declared with a value, that value goes on the wire. `false` declares a non-reasoning model; an empty declaration is refused rather than guessed at. The spelling for "disable" is `false` rather than `{}` because schemastery materializes an absent dict as `{}` — only a `z.union([z.const(false), dict])` keeps absent, disabled, and declared distinguishable, and a bare `reasoningEfforts:` (YAML null) slips through that union unvalidated, so resolution refuses it explicitly.
+
+`compat.thinkingFormat` and `compat.supportsReasoningEffort` become configurable at two levels — route (its models' default) and model (winning per field) — resolving model → route → installed catalog entry → pi-ai's URL guess. They exist only on `openai-completions` (pi-ai types them nowhere else): a model-level switch on another protocol fails resolution, a route-level default skips such models, and a route with no completions model at all is refused. The two `chat-template` formats stay withheld for want of `chatTemplateKwargs`. Both enums are pinned to pi-ai's types through `Record<UpstreamUnion, true>` drift gates, so a pi-ai upgrade that adds a format fails compilation until the new member is classified (verified against the published 0.84.1 tarball, whose `thinkingFormat` union adds `baseten` over the pinned 0.82.1).
+
+`modelOverrides` reshapes individual catalog models without replacing the served set: key = catalog model id, value = a `models` entry minus `id`, materialized by handing the override to the existing entry path so capacities, efforts, compat, and request-default semantics stay identical. Unlike Pi's own config layer, which ignores unknown ids, every override that lands nowhere is refused — beside a `models` list, on a hand-declared route, naming an unknown model, or smuggling an `id` in the value (the schema passes unknown keys through, and a smuggled id would quietly rename the model).
+
+## Alternatives considered
+
+- **Pass `reasoning` + `thinkingLevelMap` through verbatim** (pi-ai's own radius-config shape). Rejected by the user for operator confusion: the map's `null`-marks-unsupported convention plus the asymmetric absent-key rule mean the config's meaning depends on knowledge of pi-ai internals; the chosen shape makes the key set itself the offer.
+- **A bare level list** (`reasoningEfforts: [off, high]`). Cannot express wire renames, and the catalog's own maps prove renames are real: 66 of 1230 installed map entries are non-identity (`off→none`, `minimal→low`, `low→LOW`, `high→default`).
+- **`{}` as the disable spelling.** Unimplementable: schemastery materializes an absent dict as `{}`, so every model without the field would have been force-disabled.
+- **Folding this into the route-level `reasoning` knob.** That knob is a *default selection*, not a capability set; it stays, and a declared model's efforts now bound what it can select.
+
+## Consequences
+
+- The composer's effort pane works for hand-declared models with zero UI change — `resolveModelInfo` reports declared levels through the same seam catalog metadata uses (pinned by the `declared-reasoning` web scenario).
+- #1860's deferred gap — a route-level effort a model cannot take failing its requests — now has an operator remedy: align the model's `reasoningEfforts` or drop the route default.
+- There is deliberately no spelling for returning one map key or compat field to "whatever the catalog said": the declaration is the whole offer, so keeping a catalog value means restating it. The README documents this.
+- `verify-package-invariants` is untouched: the feature adds configuration resolution, no new events or mutable runtime relations.

.agents/notes/implemented/feature/2026-08-08-pi-ai-per-model-reasoning-declarations.zh.md

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+# Agent Note: llm-pi-ai 的按模型推理声明
+
+Status: implemented
+
+[English](2026-08-08-pi-ai-per-model-reasoning-declarations.md) | 中文
+
+## 问题
+
+在声明式提供方 catalog（[[2026-08-03-pi-ai-declared-provider-catalog]]，它刻意把推理排除在可配置字段之外）之下，手工声明的 pi-ai 路由，其模型物化出来就带着 `reasoning: false`，于是 `getSupportedThinkingLevels` 短路成 `["off"]`：输入框不为它们提供档位选择器，而路由级的 `reasoning` 默认值——当时 profile 仅有的推理旋钮——让发往这类模型的每个请求都在网络 I/O 之前以 `UNSUPPORTED_REASONING_EFFORT` 失败。同一个路由级旋钮对 catalog 路由来说也放错了层级：同一提供方下各模型接受的档位并不一致（deepseek 自带 `[off, high, max]`，旁边就是带 `xhigh` 的 catalog 模型），单个路由级档位怎么设都会弄坏路由的一部分——这正是模型页彻底停写它的原因（#1860），而 `settings.yaml` 也因此没有了任何按模型对齐档位的办法。
+
+两个相邻的缺口让问题雪上加霜。pi-ai 靠识别端点 URL 来决定推理的*协议方言*（`compat.thinkingFormat`、`compat.supportsReasoningEffort`），而私有网关的 URL 什么也说明不了——说 DeepSeek 方言的网关只会收到 OpenAI 方言的请求，且没有任何配置能更正它。另外，想动单个 catalog 模型，唯一的手段是 `models` 列表，而它会*替换*所服务的 catalog：收窄 `gpt-5` 的档位，意味着要么重述全部三十八个 openai 模型，要么静默丢掉三十七个。
+
+## 决策
+
+`PiAiModelProfile` 新增 `reasoningEfforts`：**每个键是选择器提供的一个档位，其值是分派在协议中发送的拼写**。该声明会转换为 pi-ai 的 `Model.reasoning` + `thinkingLevelMap`，七个档位全部显式决定——已声明的档位携带自己的协议值，未声明的档位一律固定为 `null`——因此 profile 作者永远不需要了解 pi-ai 那条不对称的默认规则（键缺席对五个基础档位意味着「支持」，对 `xhigh`/`max` 却意味着「不支持」）。`off` 是唯一的三态键：不写，选择器不提供 Off，显式请求 Off 会被拒绝（不点名档位的请求仍会不带参数地发出，提供方保留自己的默认行为）；声明而不给值，则提供 Off，分派什么也不发送（`deepseek` 方言发送 `thinking: {type: "disabled"}`）；声明并给值，该值就在协议中发送。`false` 声明一个不具备推理能力的模型；空声明会被拒绝，而不是去猜。「禁用」的拼写取 `false` 而非 `{}`，因为 schemastery 会把缺席的字典物化成 `{}`——只有 `z.union([z.const(false), dict])` 才能让缺席、禁用与已声明三态保持可区分；而裸写的 `reasoningEfforts:`（YAML null）会不经校验地从该 union 溜过去，因此解析对它显式拒绝。
+
+`compat.thinkingFormat` 与 `compat.supportsReasoningEffort` 变为两级可配置——路由级（作为其模型的默认值）与模型级（逐字段胜出）——解析顺序为模型 → 路由 → 已安装 catalog 条目 → pi-ai 按 URL 得出的猜测。两者只存在于 `openai-completions` 上（pi-ai 也只在这一协议上为它们建了类型）：在其他协议的模型上设模型级开关会使解析失败，路由级默认值会跳过这类模型，而完全没有 completions 模型的路由则被拒绝。两个 `chat-template` 格式因缺 `chatTemplateKwargs` 而继续保持不开放。两个枚举都经 `Record<UpstreamUnion, true>` 漂移门禁钉在 pi-ai 的类型上，因此新增格式的 pi-ai 升级会编译失败，直到新成员被归类（对照已发布的 0.84.1 tarball 验证过：其 `thinkingFormat` 联合类型相对钉住的 0.82.1 新增了 `baseten`）。
+
+`modelOverrides` 就地重塑单个 catalog 模型而不替换所服务的集合：键 = catalog 模型 id，值 = 去掉 `id` 的 `models` 条目，物化时把覆盖交给既有的条目路径，因此容量、档位、compat 与请求默认值语义完全一致。与忽略未知 id 的 Pi 自有配置层不同，凡是落不到任何地方的覆盖都会被拒绝——与 `models` 列表并存、写在手工声明的路由上、点名未知模型，或在值里夹带 `id`（schema 会放行未知键，被夹带的 id 会悄悄把模型改名）。
+
+## 曾考虑的替代方案
+
+- **把 `reasoning` + `thinkingLevelMap` 原样透传**（pi-ai 自家 radius 配置的形状）。用户以运维人员困惑为由否决：map 用 `null` 标记「不支持」的约定，加上不对称的键缺席规则，意味着这份配置的含义取决于对 pi-ai 内部机制的了解；选定的形状则让键集合本身就是对外提供的全部。
+- **裸档位列表**（`reasoningEfforts: [off, high]`）。表达不了协议侧改名，而 catalog 自己的 map 证明改名真实存在：1230 条已安装 map 条目里有 66 条不是恒等映射（`off→none`、`minimal→low`、`low→LOW`、`high→default`）。
+- **用 `{}` 作为禁用拼写。** 无法实现：schemastery 会把缺席的字典物化成 `{}`，于是每个没写该字段的模型都会被强制禁用。
+- **把这件事并进路由级的 `reasoning` 旋钮。** 那个旋钮是*默认选择*，不是能力集合；它保留下来，而已声明模型的档位如今约束着它能选什么。
+
+## 后果
+
+- 输入框的档位面板对手工声明的模型直接可用，UI 零改动——`resolveModelInfo` 经 catalog 元数据所走的同一 seam 报告已声明档位（由 `declared-reasoning` web 场景钉住）。
+- #1860 暂缓的缺口——模型接不住的路由级档位会让发往它的请求失败——如今有了运维侧补救：对齐该模型的 `reasoningEfforts`，或去掉路由默认值。
+- 刻意不提供任何把单个 map 键或 compat 字段交还给「catalog 原本怎么说」的拼写：这份声明就是对外提供的全部，要保留某个 catalog 值就得重述它。README 记载了这一点。
+- `verify-package-invariants` 原封未动：该功能新增的是配置解析，没有新事件，也没有可变的运行时关系。