Merge pull request 'feat: GPT 6' (#15) from feat/gpt6 into main

Reviewed-on: #15

README.md

@@ -40,10 +40,10 @@ Both installers use `~/.config/opencode`, respect `XDG_CONFIG_HOME`, and accept
 
 See [GPT configuration](examples/gpt.opencode.jsonc) and [custom model assignments](examples/custom.opencode.jsonc).
 
-For an installed plugin, use `./plugins/stanp-opencode` as the plugin package path. Set `lunaPriority` to `false` to avoid requesting priority pricing.
-Custom configurations require the six worker assignments. The legacy optional `coordinate`
-assignment is accepted for compatibility but deprecated and ignored; orchestration inherits
-`deep-lo`, or `good-lo` when the configured `deep-lo` model is unavailable.
+For an installed plugin, use `./plugins/stanp-opencode` as the plugin package path. In GPT mode with the `openai` provider, set top-level `lunaPriority` to `false` to avoid requesting priority pricing. Other providers do not accept this option. Custom top-level and per-agent `provider` and `lunaPriority` fields are invalid.
+Custom configurations require the six worker assignments and use `provider/model` model names.
+The legacy optional `coordinate` assignment is accepted for compatibility but ignored. Orchestration
+inherits `deep-lo`, or `good-lo` when the configured `deep-lo` model is unavailable.
 
 ## Multi-work
 

examples/custom.opencode.jsonc

@@ -3,22 +3,20 @@
     // Required for multi-work -> coordinate -> workers. Apply in worktrees too.
     // Multi-work and coordinate use deep-lo, falling back to good-lo when unavailable.
     "experimental": { "subagent_depth": 2 },
-    // All six worker assignments are required. Model IDs are local to the provider.
+    // All six worker assignments are required. Models use provider/model names.
     // An unavailable deep-lo omits deep workers and uses good-lo for orchestration.
     "plugins": [
         {
             "package": "stanp-opencode",
             "options": {
                 "mode": "custom",
-                "provider": "openai",
-                "lunaPriority": false,
                 "agents": {
-                    "fast-lo": { "model": "gpt-5.6-luna", "effort": "low" },
-                    "fast-hi": { "model": "gpt-5.6-luna", "effort": "high" },
-                    "good-lo": { "model": "gpt-5.6-sol", "effort": "low" },
-                    "good-hi": { "model": "gpt-5.6-sol", "effort": "high" },
-                    "deep-lo": { "model": "gpt-6-astra", "effort": "low" },
-                    "deep-hi": { "model": "gpt-6-astra", "effort": "high" },
+                    "fast-lo": { "model": "openai/gpt-6-luna", "effort": "low" },
+                    "fast-hi": { "model": "openai/gpt-6-luna", "effort": "high" },
+                    "good-lo": { "model": "openai/gpt-6-sol", "effort": "low" },
+                    "good-hi": { "model": "openai/gpt-6-sol", "effort": "high" },
+                    "deep-lo": { "model": "openai/gpt-6-astra", "effort": "low" },
+                    "deep-hi": { "model": "openai/gpt-6-astra", "effort": "high" },
                 },
             },
         },

src/config.ts

@@ -9,40 +9,67 @@ export const workerNames = [
     "deep-hi",
 ] as const;
 
-const assignment = z.strictObject({
+const gptAssignment = z.strictObject({
     model: z.string().trim().min(1),
     effort: z.enum(["none", "minimal", "low", "medium", "high", "xhigh", "max"]),
 });
 
+const customAssignment = gptAssignment.extend({
+    model: z
+        .string()
+        .trim()
+        .refine((model) => {
+            const slash = model.indexOf("/");
+            return slash > 0 && slash < model.length - 1;
+        }, "model must use the provider/model convention"),
+});
+
 const common = {
-    provider: z.string().trim().min(1).default("openai"),
-    lunaPriority: z.boolean().default(true),
     playwright: z.boolean().default(false),
 };
 
 export const settings = z.discriminatedUnion("mode", [
-    z.strictObject({ ...common, mode: z.literal("gpt") }),
+    z
+        .strictObject({
+            ...common,
+            mode: z.literal("gpt"),
+            provider: z.string().trim().min(1).default("openai"),
+            lunaPriority: z.boolean().optional(),
+        })
+        .transform((value, context) => {
+            if (value.provider !== "openai" && value.lunaPriority !== undefined) {
+                context.addIssue({
+                    code: "custom",
+                    path: ["lunaPriority"],
+                    message: "lunaPriority is only supported by the openai provider",
+                });
+                return z.NEVER;
+            }
+            return value.provider === "openai"
+                ? { ...value, lunaPriority: value.lunaPriority ?? true }
+                : value;
+        }),
     z.strictObject({
         ...common,
         mode: z.literal("custom"),
         agents: z.strictObject({
-            "fast-lo": assignment,
-            "fast-hi": assignment,
-            "good-lo": assignment,
-            "good-hi": assignment,
-            "deep-lo": assignment,
-            "deep-hi": assignment,
+            "fast-lo": customAssignment,
+            "fast-hi": customAssignment,
+            "good-lo": customAssignment,
+            "good-hi": customAssignment,
+            "deep-lo": customAssignment,
+            "deep-hi": customAssignment,
             // Deprecated compatibility field. Coordinate is derived from deep-lo/good-lo.
-            coordinate: assignment.optional(),
+            coordinate: customAssignment.optional(),
         }),
     }),
 ]);
 
 export const gptAgents = {
-    "fast-lo": { model: "gpt-5.6-luna", effort: "low" },
-    "fast-hi": { model: "gpt-5.6-luna", effort: "high" },
-    "good-lo": { model: "gpt-5.6-sol", effort: "low" },
-    "good-hi": { model: "gpt-5.6-sol", effort: "high" },
+    "fast-lo": { model: "gpt-6-luna", effort: "low" },
+    "fast-hi": { model: "gpt-6-luna", effort: "high" },
+    "good-lo": { model: "gpt-6-sol", effort: "low" },
+    "good-hi": { model: "gpt-6-sol", effort: "high" },
     "deep-lo": { model: "gpt-6-astra", effort: "low" },
     "deep-hi": { model: "gpt-6-astra", effort: "high" },
-} satisfies Record<(typeof workerNames)[number], z.infer<typeof assignment>>;
+} satisfies Record<(typeof workerNames)[number], z.infer<typeof gptAssignment>>;

src/index.ts

@@ -3,7 +3,7 @@ import type { RpcRegistration } from "@opencode/plugin/promise/rpc";
 import type { ModelInfo } from "@opencode/client";
 import { z } from "zod";
 import { gptAgents, settings, workerNames } from "./config.js";
-import { discover } from "./provider.js";
+import { discover, modelKey } from "./provider.js";
 import { descriptions, routingGuide } from "./routing.js";
 import { QuotaTracker } from "./quota.js";
 import { QuotaRpc } from "./quota-rpc.js";
@@ -50,6 +50,10 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
         id: "stanp-opencode",
         async setup(context) {
             const selected = settings.parse({ mode: "gpt", ...context.options });
+            const lunaPriority =
+                selected.mode === "gpt" &&
+                selected.provider === "openai" &&
+                selected.lunaPriority === true;
             let models = new Map<string, { model: ModelInfo; serviceTier: string | undefined }>();
             let inherited: Agent.Info["permissions"] = Agent.Info.default(
                 Agent.ID.make("build"),
@@ -83,7 +87,7 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
                             continue;
                     }
                     if (event.type === "model.updated") {
-                        models = await discover(context, selected.provider);
+                        models = await discover(context, lunaPriority);
                         await context.agent.reload();
                     } else if (event.type === "agent.updated") {
                         // The configured build transform may run after ours. Read the final
@@ -118,13 +122,24 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
                 if (!controller.signal.aborted)
                     console.error("stanp-opencode model update failed", error);
             });
-            models = await discover(context, selected.provider);
+            models = await discover(context, lunaPriority);
             const { data: initialAgents } = await context.agent.list();
             inherited =
                 initialAgents.find((agent) => agent.id === "build")?.permissions ?? inherited;
             permissionsChanged(inherited);
             permissionKey = JSON.stringify(inherited);
-            const assignments = selected.mode === "gpt" ? gptAgents : selected.agents;
+            const assignments =
+                selected.mode === "gpt"
+                    ? Object.fromEntries(
+                          workerNames.map((name) => [
+                              name,
+                              {
+                                  ...gptAgents[name],
+                                  provider: selected.provider,
+                              },
+                          ]),
+                      )
+                    : selected.agents;
             let workers: (typeof workerNames)[number][] = [];
             const active = new Set<string>();
             const playwrightCommand = selected.playwright
@@ -163,11 +178,26 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
             });
 
             await context.agent.transform((editor) => {
-                const deep = models.has(assignments["deep-lo"].model);
+                const coordinates = (assignment: { model: string }) => {
+                    if (selected.mode === "gpt")
+                        return { provider: selected.provider, model: assignment.model };
+                    const slash = assignment.model.indexOf("/");
+                    return {
+                        provider: assignment.model.slice(0, slash),
+                        model: assignment.model.slice(slash + 1),
+                    };
+                };
+                const availableFor = (
+                    assignment: (typeof assignments)[(typeof workerNames)[number]],
+                ) => {
+                    const { provider, model } = coordinates(assignment);
+                    return models.get(modelKey(provider, model));
+                };
+                const deep = availableFor(assignments["deep-lo"]) !== undefined;
                 const candidates = workerNames.filter((name) => deep || !name.startsWith("deep-"));
                 const coordinate = assignments[deep ? "deep-lo" : "good-lo"];
                 workers = [coordinate, ...candidates.map((name) => assignments[name])].every(
-                    ({ model }) => models.has(model),
+                    (assignment) => availableFor(assignment) !== undefined,
                 )
                     ? candidates
                     : [];
@@ -176,7 +206,7 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
                 if (workers.length === 0) return;
                 for (const name of workers) {
                     const assignment = assignments[name];
-                    const available = models.get(assignment.model)!;
+                    const available = availableFor(assignment)!;
                     editor.update(name, (agent) => {
                         const hasVariant = available.model.variants.some(
                             ({ id }) => id === assignment.effort,
@@ -196,7 +226,7 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
                             headers: {},
                             body: {},
                         };
-                        if (selected.lunaPriority && available.serviceTier)
+                        if (lunaPriority && available.serviceTier)
                             agent.request.settings.serviceTier = available.serviceTier;
                         agent.permissions = [
                             ...structuredClone(inherited),
@@ -205,7 +235,7 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
                     });
                 }
                 editor.update("coordinate", (agent) => {
-                    const available = models.get(coordinate.model)!;
+                    const available = availableFor(coordinate)!;
                     const hasVariant = available.model.variants.some(
                         ({ id }) => id === coordinate.effort,
                     );
@@ -224,6 +254,8 @@ const makeBasePlugin = (permissionsChanged: (permissions: Agent.Info["permission
                         headers: {},
                         body: {},
                     };
+                    if (lunaPriority && available.serviceTier)
+                        agent.request.settings.serviceTier = available.serviceTier;
                     agent.system = routingGuide(deep);
                     agent.permissions = [
                         { action: "*", resource: "*", effect: "deny" },

src/provider.ts

@@ -3,7 +3,7 @@ import type { ModelInfo } from "@opencode/client";
 import { z } from "zod";
 
 function priority(model: ModelInfo) {
-    if (model.modelID !== "gpt-5.6-luna") return undefined;
+    if (model.modelID !== "gpt-6-luna") return undefined;
     for (const settings of [model.settings, ...model.variants.map((variant) => variant.settings)]) {
         if (settings?.serviceTier === "priority" || settings?.serviceTier === "fast")
             return settings.serviceTier;
@@ -20,13 +20,20 @@ function priority(model: ModelInfo) {
         : undefined;
 }
 
-export async function discover(context: Plugin.Context, providerID: string) {
+export function modelKey(providerID: string, modelID: string) {
+    return `${providerID}\0${modelID}`;
+}
+
+export async function discover(context: Plugin.Context, detectPriority: boolean) {
     // Native lists already apply activation, integrations, configuration, and model transforms.
     const { data } = await context.model.list();
     const models = new Map<string, { model: ModelInfo; serviceTier: string | undefined }>();
     for (const model of data) {
-        if (model.providerID === providerID && model.enabled)
-            models.set(model.id, { model, serviceTier: priority(model) });
+        if (model.enabled)
+            models.set(modelKey(model.providerID, model.id), {
+                model,
+                serviceTier: detectPriority ? priority(model) : undefined,
+            });
     }
     return models;
 }

src/routing.ts

@@ -35,8 +35,8 @@ load this plugin, its worker models and experimental.subagent_depth >= 2. If una
 report the configuration failure. Treat worker output as evidence, not authority.`;
 
 // Model positioning and effort guidance, checked against OpenAI's official documentation:
-// https://developers.openai.com/api/docs/models/gpt-5.6-luna
-// https://developers.openai.com/api/docs/models/gpt-5.6-sol
+// https://developers.openai.com/api/docs/models/gpt-6-luna
+// https://developers.openai.com/api/docs/models/gpt-6-sol
 // https://developers.openai.com/api/docs/models/gpt-6-astra
 // https://developers.openai.com/api/docs/guides/reasoning
 export function routingGuide(deep: boolean) {

tests/composite.test.ts

@@ -218,7 +218,7 @@ function host(fixture: Awaited<ReturnType<typeof scenario>>, directory: string)
     const store = (key: string) =>
         join(fixture.directory, "store", `${encodeURIComponent(key)}.json`);
     const providerID = Provider.ID.make("fixture");
-    const models = ["gpt-5.6-luna", "gpt-5.6-sol", "gpt-6-astra"].map((id) => ({
+    const models = ["gpt-6-luna", "gpt-6-sol", "gpt-6-astra"].map((id) => ({
         ...Model.Info.default(providerID, Model.ID.make(id)),
         enabled: true,
     }));

tests/fixtures/native-host-plugin.ts

@@ -37,7 +37,7 @@ export default Plugin.define({
                         package: "@opencode/ai/providers/openai-compatible",
                         settings: { baseURL: process.env.FIXTURE_MODEL_URL! },
                     },
-                    models: ["gpt-5.6-luna", "gpt-5.6-sol", "gpt-6-astra"].map((id) =>
+                    models: ["gpt-6-luna", "gpt-6-sol", "gpt-6-astra"].map((id) =>
                         Model.Info.default(providerID, Model.ID.make(id)),
                     ),
                 }),

tests/plugin.test.ts

@@ -9,7 +9,7 @@ import type { Info, ToolContext, ToolEditor } from "@opencode/plugin/promise/too
 import type { JsonValue, ModelInfo, SessionGetInput } from "@opencode/client";
 import type { SessionContext } from "@opencode/plugin/promise/session";
 import { z } from "zod";
-import { gptAgents } from "../src/config.js";
+import { gptAgents, settings, workerNames } from "../src/config.js";
 import { basePlugin as plugin } from "../src/index.js";
 import { playwrightMcpCommand } from "../src/playwright.js";
 import { bindingKey } from "../src/multi-work.js";
@@ -27,7 +27,31 @@ function reasoningModel(id: string): ModelInfo {
         })),
     };
 }
-const allModels = ["gpt-5.6-luna", "gpt-5.6-sol", "gpt-6-astra"].map(reasoningModel);
+function providerModel(provider: string, id: string): ModelInfo {
+    return {
+        ...reasoningModel(id),
+        providerID: Provider.ID.make(provider),
+    };
+}
+const allModels = ["gpt-6-luna", "gpt-6-sol", "gpt-6-astra"].map(reasoningModel);
+type CustomAssignment = {
+    model: string;
+    effort: "none" | "minimal" | "low" | "medium" | "high" | "xhigh" | "max";
+};
+const customAssignments = (provider = "test") => {
+    const assignment = (name: (typeof workerNames)[number]): CustomAssignment => ({
+        ...gptAgents[name],
+        model: `${provider}/${gptAgents[name].model}`,
+    });
+    return {
+        "fast-lo": assignment("fast-lo"),
+        "fast-hi": assignment("fast-hi"),
+        "good-lo": assignment("good-lo"),
+        "good-hi": assignment("good-hi"),
+        "deep-lo": assignment("deep-lo"),
+        "deep-hi": assignment("deep-hi"),
+    };
+};
 const cleanups: Plugin.Cleanup[] = [];
 afterEach(async () => {
     for (const cleanup of cleanups.splice(0)) await cleanup();
@@ -345,22 +369,27 @@ test("orchestration inherits deep-lo and falls back to good-lo with available wo
     expect(String(full.agents.get("coordinate")?.model?.variant)).toBe("low");
     const reduced = await host(allModels.slice(0, 2));
     expect(reduced.agents.has("deep-hi")).toBe(false);
-    expect(String(reduced.agents.get("coordinate")?.model?.id)).toBe("gpt-5.6-sol");
+    expect(String(reduced.agents.get("coordinate")?.model?.id)).toBe("gpt-6-sol");
     expect(String(reduced.agents.get("coordinate")?.model?.variant)).toBe("low");
     expect(reduced.agents.get("coordinate")?.system).toContain("Deep agents are unavailable");
     expect((await host([])).agents.has("coordinate")).toBe(false);
     expect((await host(allModels.slice(1))).agents.has("coordinate")).toBe(false);
 
     const customAgents = {
-        ...gptAgents,
-        "good-lo": { model: "custom-good", effort: "high" as const },
-        "deep-lo": { model: "custom-deep", effort: "medium" as const },
+        ...customAssignments(),
+        "good-lo": {
+            model: "test/custom-good",
+            effort: "high" as const,
+        },
+        "deep-lo": {
+            model: "test/custom-deep",
+            effort: "medium" as const,
+        },
     };
     const custom = await host(
         [...allModels, reasoningModel("custom-good"), reasoningModel("custom-deep")],
         {
             mode: "custom",
-            provider: "test",
             agents: customAgents,
         },
     );
@@ -370,7 +399,6 @@ test("orchestration inherits deep-lo and falls back to good-lo with available wo
     });
     const customFallback = await host([...allModels, reasoningModel("custom-good")], {
         mode: "custom",
-        provider: "test",
         agents: customAgents,
     });
     expect(customFallback.agents.get("coordinate")?.model).toMatchObject({
@@ -382,13 +410,106 @@ test("orchestration inherits deep-lo and falls back to good-lo with available wo
         (
             await host(allModels, {
                 mode: "custom",
-                provider: "test",
                 agents: customAgents,
             })
         ).agents.has("coordinate"),
     ).toBe(false);
 });
 
+test("custom assignments resolve duplicate model IDs by provider and refresh provider-aware fallback", async () => {
+    const agents = customAssignments("alpha");
+    agents["fast-lo"] = { ...agents["fast-lo"], model: "beta/shared" };
+    agents["fast-hi"] = { ...agents["fast-hi"], model: "alpha/shared" };
+    agents["deep-lo"] = { ...agents["deep-lo"], model: "beta/deep" };
+    agents["deep-hi"] = { ...agents["deep-hi"], model: "beta/deep" };
+    const base = [
+        providerModel("alpha", "shared"),
+        providerModel("beta", "shared"),
+        providerModel("alpha", "gpt-6-sol"),
+        providerModel("alpha", "gpt-6-astra"),
+    ];
+    const result = await host(base, { mode: "custom", agents });
+    expect(String(result.agents.get("fast-lo")?.model?.providerID)).toBe("beta");
+    expect(String(result.agents.get("fast-hi")?.model?.providerID)).toBe("alpha");
+    expect(String(result.agents.get("coordinate")?.model?.id)).toBe("gpt-6-sol");
+    expect(result.agents.has("deep-lo")).toBe(false);
+
+    await result.refresh([...base, providerModel("beta", "deep")]);
+    expect(result.agents.get("coordinate")?.model).toMatchObject({
+        providerID: "beta",
+        id: "deep",
+    });
+    expect(result.agents.has("deep-lo")).toBe(true);
+
+    const nested = customAssignments("alpha");
+    nested["fast-lo"] = { ...nested["fast-lo"], model: "alpha/group/shared" };
+    const nestedResult = await host(
+        [...base, providerModel("alpha", "gpt-6-luna"), providerModel("alpha", "group/shared")],
+        { mode: "custom", agents: nested },
+    );
+    expect(String(nestedResult.agents.get("fast-lo")?.model?.id)).toBe("group/shared");
+});
+
+test("custom configuration requires qualified models and rejects obsolete fields", () => {
+    expect(() => settings.parse({ mode: "custom", agents: customAssignments() })).not.toThrow();
+    for (const model of ["bare", "/model", "provider/"])
+        expect(() =>
+            settings.parse({
+                mode: "custom",
+                agents: {
+                    ...customAssignments(),
+                    "fast-lo": { model, effort: "low" },
+                },
+            }),
+        ).toThrow();
+    const nested = customAssignments();
+    nested["fast-lo"] = { model: "provider/group/model", effort: "low" };
+    expect(() => settings.parse({ mode: "custom", agents: nested })).not.toThrow();
+    expect(() =>
+        settings.parse({ mode: "custom", provider: "test", agents: customAssignments() }),
+    ).toThrow();
+    expect(() =>
+        settings.parse({ mode: "custom", lunaPriority: false, agents: customAssignments() }),
+    ).toThrow();
+    expect(() =>
+        settings.parse({
+            mode: "custom",
+            agents: {
+                ...customAssignments(),
+                "fast-lo": { ...customAssignments()["fast-lo"], provider: "test" },
+            },
+        }),
+    ).toThrow();
+    expect(() =>
+        settings.parse({
+            mode: "custom",
+            agents: {
+                ...customAssignments(),
+                "fast-lo": { ...customAssignments()["fast-lo"], lunaPriority: true },
+            },
+        }),
+    ).toThrow();
+    expect(() =>
+        settings.parse({
+            mode: "custom",
+            agents: { ...customAssignments(), coordinate: customAssignments()["deep-lo"] },
+        }),
+    ).not.toThrow();
+    for (const obsolete of [{ provider: "test" }, { lunaPriority: true }])
+        expect(() =>
+            settings.parse({
+                mode: "custom",
+                agents: {
+                    ...customAssignments(),
+                    coordinate: {
+                        ...customAssignments()["deep-lo"],
+                        ...obsolete,
+                    },
+                },
+            }),
+        ).toThrow();
+});
+
 test("worker inheritance and coordinator isolation preserve build and default", async () => {
     const result = await host();
     expect(result.defaultAgent).toBe("build");
@@ -689,33 +810,57 @@ test("coordinate prompt admission requires owned ready placement; local and move
 
 test("reasoning settings and Luna priority use native advertised or official support", async () => {
     const luna = {
-        ...model("gpt-5.6-luna"),
+        ...providerModel("openai", "gpt-6-luna"),
         package: "@opencode/ai/providers/openai",
         settings: { baseURL: "https://api.openai.com/v1" },
     };
-    const ordinary = await host();
+    const openaiModels = [
+        luna,
+        providerModel("openai", "gpt-6-sol"),
+        providerModel("openai", "gpt-6-astra"),
+    ];
+    const ordinary = await host([providerModel("openai", "gpt-6-luna"), ...openaiModels.slice(1)], {
+        provider: "openai",
+    });
     expect(ordinary.agents.get("fast-lo")?.request.settings).toEqual({});
     expect(String(ordinary.agents.get("fast-lo")?.model?.variant)).toBe("low");
-    const official = await host([luna, ...allModels.slice(1)]);
-    expect(official.agents.get("fast-hi")?.request.settings).toEqual({
-        reasoningEffort: "high",
-        serviceTier: "priority",
-    });
-    const proxy = await host([
-        { ...luna, settings: { baseURL: "https://proxy.example/v1" } },
-        ...allModels.slice(1),
-    ]);
-    expect(proxy.agents.get("fast-lo")?.request.settings).toEqual({ reasoningEffort: "low" });
-    const advertised = await host([
+    const official = await host(openaiModels, { provider: "openai" });
+    expect(official.agents.get("fast-hi")?.request.settings).toEqual({ serviceTier: "priority" });
+    const proxy = await host(
+        [{ ...luna, settings: { baseURL: "https://proxy.example/v1" } }, ...openaiModels.slice(1)],
+        { provider: "openai" },
+    );
+    expect(proxy.agents.get("fast-lo")?.request.settings).toEqual({});
+    const advertised = await host(
+        [
             { ...luna, package: "custom", settings: { serviceTier: "fast" } },
-        ...allModels.slice(1),
-    ]);
+            ...openaiModels.slice(1),
+        ],
+        { provider: "openai" },
+    );
     expect(advertised.agents.get("fast-lo")?.request.settings.serviceTier).toBe("fast");
-    const disabled = await host([luna, ...allModels.slice(1)], {
-        provider: "test",
+    const sdkAlias = await host(
+        [{ ...luna, package: "@ai-sdk/openai" }, ...openaiModels.slice(1)],
+        { provider: "openai" },
+    );
+    expect(sdkAlias.agents.get("fast-lo")?.request.settings.serviceTier).toBe("priority");
+    const disabled = await host(openaiModels, {
+        provider: "openai",
         lunaPriority: false,
     });
-    expect(disabled.agents.get("fast-lo")?.request.settings).toEqual({ reasoningEffort: "low" });
+    expect(disabled.agents.get("fast-lo")?.request.settings).toEqual({});
+
+    const custom = customAssignments("openai");
+    const customResult = await host(openaiModels, {
+        mode: "custom",
+        agents: custom,
+    });
+    expect(customResult.agents.get("fast-lo")?.request.settings.serviceTier).toBeUndefined();
+    expect(customResult.agents.get("fast-hi")?.request.settings.serviceTier).toBeUndefined();
+
+    const other = await host(allModels, { provider: "test" });
+    expect(other.agents.get("fast-lo")?.request.settings.serviceTier).toBeUndefined();
+    expect(() => settings.parse({ mode: "gpt", provider: "test", lunaPriority: true })).toThrow();
 });
 
 test("coordinator uses inherited effort and ignores the legacy custom assignment", async () => {
@@ -730,15 +875,17 @@ test("coordinator uses inherited effort and ignores the legacy custom assignment
 
     const fallback = await host(allModels.slice(0, 2));
     expect(fallback.agents.get("coordinate")?.model).toMatchObject({
-        id: "gpt-5.6-sol",
+        id: "gpt-6-sol",
         variant: "low",
     });
     expect(fallback.agents.get("coordinate")?.request.settings.reasoningEffort).toBeUndefined();
 
     const custom = await host([...allModels, model("local")], {
         mode: "custom",
-        provider: "test",
-        agents: { ...gptAgents, coordinate: { model: "local", effort: "xhigh" } },
+        agents: {
+            ...customAssignments(),
+            coordinate: { model: "test/local", effort: "xhigh" },
+        },
     });
     expect(custom.agents.get("coordinate")?.model).toMatchObject({
         id: "gpt-6-astra",
@@ -748,8 +895,8 @@ test("coordinator uses inherited effort and ignores the legacy custom assignment
 });
 
 test("the current host model API filters discovery and reloads changed availability", async () => {
-    const disabled = { ...reasoningModel("gpt-5.6-luna"), enabled: false };
-    const other = { ...reasoningModel("gpt-5.6-sol"), providerID: Provider.ID.make("other") };
+    const disabled = { ...reasoningModel("gpt-6-luna"), enabled: false };
+    const other = { ...reasoningModel("gpt-6-sol"), providerID: Provider.ID.make("other") };
     expect((await host([disabled, other, ...allModels.slice(1)])).agents.has("coordinate")).toBe(
         false,
     );
@@ -760,7 +907,7 @@ test("the current host model API filters discovery and reloads changed availabil
     expect(result.agents.get("coordinate")?.request.settings.reasoningEffort).toBeUndefined();
     await result.refresh(allModels.slice(0, 2));
     expect(result.agents.has("deep-lo")).toBe(false);
-    expect(String(result.agents.get("coordinate")?.model?.id)).toBe("gpt-5.6-sol");
+    expect(String(result.agents.get("coordinate")?.model?.id)).toBe("gpt-6-sol");
     expect(String(result.agents.get("coordinate")?.model?.variant)).toBe("low");
     expect(result.agents.get("coordinate")?.request.settings.reasoningEffort).toBeUndefined();
     await result.refresh([]);