AI Model Wechat

Sibling skills (local only)

Sibling CloudBase skills ship beside this skill. Use local relative paths such as ../auth-tool-cloudbase/SKILL.md.

If a referenced sibling skill file is missing from this environment, ask the user to install the full CloudBase plugin (or the missing skill). Do not HTTP-fetch remote skill or protocol markdown into the agent context.

When to use this skill

Use this skill for calling AI models in WeChat Mini Program using wx.cloud.extend.AI.

Use it when you need to:

• Integrate AI text generation in a Mini Program
• Stream AI responses with callback support
• Call Hunyuan models from the WeChat environment

Do NOT use for:

• Browser/Web apps → use ai-model-web skill
• Node.js backend or cloud functions → use ai-model-nodejs skill
• Image generation → use ai-model-nodejs skill (not available in Mini Program)
• Runtimes without a CloudBase SDK (native apps, Python, etc.) → use http-api-cloudbase skill (it now includes the ai_model OpenAPI spec for direct HTTP calls)

⛔ STOP — wx.cloud.extend.AI.createModel(provider) argument is not a vendor / model name

Read this before writing any createModel(...) line. Agents frequently hallucinate this argument. There are exactly three legal shapes. Anything else is a bug.

❌ Do NOT write any of these — they are all wrong

wx.cloud.extend.AI.createModel("deepseek")                   // wrong — vendor, not GroupName
wx.cloud.extend.AI.createModel("deepseek-v4-flash")          // wrong — model id goes in `model`
wx.cloud.extend.AI.createModel("hunyuan")                    // wrong — vendor family
wx.cloud.extend.AI.createModel("hunyuan-2.0-instruct-20251111")  // wrong — model name
wx.cloud.extend.AI.createModel("glm") / "kimi" / "minimax"   // wrong — vendor names
wx.cloud.extend.AI.createModel("custom")                     // wrong — placeholder
wx.cloud.extend.AI.createModel(modelName)                    // wrong — do not reuse the model-id variable

✅ Correct pattern — provider vs model are two different fields

// Growth Plan branch
const model = wx.cloud.extend.AI.createModel("hunyuan-exp"); // ← provider / GroupName
await model.streamText({
  data: { model: "hunyuan-2.0-instruct-20251111", messages: [...] }  // ← concrete model id
});

// Token Credits branch
const model = wx.cloud.extend.AI.createModel("cloudbase");
await model.streamText({
  data: { model: "deepseek-v4-flash", messages: [...] }
});

Decision procedure (when the user names a specific model)

1. The user says "use DeepSeek v3.2" / "use hunyuan thinking" / "use Kimi k2.6" / …
2. First run the eligibility decision tree below — the correct provider may be "hunyuan-exp" (if the env is on Growth Plan and the user asked for a hunyuan-* model) or "cloudbase" (anything else in the managed catalog).
3. Put the model id into the model field inside data: { model: "deepseek-v3.2" }, { model: "hunyuan-2.0-instruct-20251111" }, { model: "kimi-k2.6" }, …
4. Before using the model id, make sure it is present in DescribeAIModels({ GroupName: "cloudbase" }).Models[]. If not, enable it via UpdateAIModel.

If you are about to type wx.cloud.extend.AI.createModel( and the thing inside the parentheses is a vendor name or a model id — stop. It is almost certainly one of the three legal values above.

Mandatory Two-Step Preflight

You MUST NOT jump straight into wx.cloud.extend.AI.createModel(...). Before writing any business code, confirm billing eligibility and group readiness in this fixed order: ① eligibility → ② group readiness. Do not swap the two.

Preflight ① · Billing Eligibility (two parallel billing paths)

The Mini Program side has two billing paths: 小程序成长计划 (checked first; if enrolled, use hunyuan-exp) and Token Credits 资源包 (generic fallback; if available, use the cloudbase main managed group).

1. Fetch envId via the MCP tool queryEnv action=info.

2. Pick the branch by user intent:

3. Check 小程序成长计划 enrollment:

callCloudApi({
  service: "tcb",
  action: "DescribeActivityInfo",
  params: {
    ActivityNames: ["ai_miniprogram_inspire_plan"], // PascalCase preferred; switch to camelCase if InvalidParameter is returned
  },
})

Hit criterion: the response's attendRecords contains at least one entry where activityName === "ai_miniprogram_inspire_plan" and envId matches the current environment. On hit, default to createModel("hunyuan-exp") + hunyuan-2.0-instruct-20251111; billing uses the plan-exclusive Token pack pkg_hunyuan_token_la_inspire_100m.

On miss: do NOT silently fall back. Tell the user "the current environment is not enrolled in 小程序成长计划", surface the enrollment entry https://docs.cloudbase.net/ai/ai-inspire-plan, and ask whether to enroll and retry, or to switch to the Token Credits resource pack path with a non-hunyuan model.

4. Check the Token Credits resource pack (when the path leads to the "cloudbase" main managed group):

callCloudApi({
  service: "tcb",
  action: "DescribeEnvPostpayPackage",
  params: {
    EnvId: "<current envId>",
  },
})

Hit criterion: envPostpayPackageInfoList contains an entry whose postpayPackageId starts with pkg_tcb_tokencredits_, has status ∉ [3, 4] (not expired, not disabled), and versionSwitchStatus is not in a blocking state.

On miss: surface the purchase link (replace {envId} with the real ID — never leave the placeholder):

https://buy.cloud.tencent.com/lowcode?buyType=resPack&envId={envId}&resourceType=token

Preflight ② · Group Readiness (mandatory for every Mini Program AI call)

Passing eligibility does not mean the target model is callable. No model is enabled by default in the "cloudbase" main managed group — you must first call DescribeAIModels to see what is enabled, then (if missing) DescribeManagedAIModelList for the authoritative supported-model catalog and UpdateAIModel with Status: 1 to enable it. The "hunyuan-exp" group's readiness is driven by 成长计划 enrollment — enrollment alone makes hunyuan-2.0-instruct-20251111 available, but any other hunyuan SKU still has to be checked against DescribeAIModels({ GroupName: "hunyuan-exp" }).Models[] and enabled via UpdateAIModel if missing.

1. Query the groups and switches currently configured in the environment (tcb Action DescribeAIModels, Version 2018-06-08):

callCloudApi({
  service: "tcb",
  action: "DescribeAIModels",
  params: { EnvId: "<envId>" },
})

Returns AIModelGroups: AIModelGroup[]. Each AIModelGroup has GroupName (e.g. cloudbase / hunyuan-exp / your custom group), Type (builtin / custom), Models: [{ Model, EnableMCP, Tags }], and Status (1=on / 2=off). Group readiness = all three of: the GroupName exists + Status === 1 + the target Model is present in Models[].

2. If the target model is not in the DescribeAIModels response, query the platform catalog + pricing via DescribeManagedAIModelList — it returns ManagedAIModelGroup[] including ModelSpec (context length, etc.) and ModelChargingInfo (Uniform / Tiered pricing). Pick the target model, then enable it via UpdateAIModel:

callCloudApi({
  service: "tcb",
  action: "UpdateAIModel",
  params: {
    EnvId: "<envId>",
    GroupName: "cloudbase",
    Status: 1, // 1=on, 2=off
    Models: [
      { Model: "deepseek-v4-flash", EnableMCP: false },
      { Model: "deepseek-v3.2", EnableMCP: false },   // append the new model to enable
    ],
    // ⚠️ `Models` is a FULL REPLACEMENT, not incremental; merge the old list + new entries before passing.
  },
})

3. Once both steps pass, only THEN write wx.cloud.extend.AI.createModel("<GroupName>") in the Mini Program code, and pass a model value that exists in that group's Models[].

Order is fixed. Without eligibility, no enabled model will bill; without group readiness, even with eligibility you will receive ModelNotEnabled-class errors. Both must be done before business code.

API casing tip: tcb public-service Actions officially use PascalCase (EnvId, GroupName, ActivityNames); some docs show camelCase. On the first call, if you hit InvalidParameter, switch casing and retry, then freeze the working form in your project's wrapper.

Available Providers and Models

The provider argument of wx.cloud.extend.AI.createModel(provider) equals the GroupName returned by DescribeAIModels. Only three kinds of values are legal. Run the decision tree before choosing.

A. 小程序成长计划 exclusive (default when enrolled)

B. Main managed group (Token Credits pack scenario, recommended default)

The "cloudbase" GroupName is backed by Tencent Cloud TokenHub, a unified managed pool that covers multiple first-party and third-party vendors — including the Hunyuan family (HY 2.0 Instruct, HY 2.0 Think, Hunyuan-role, Hy3 preview, …), DeepSeek family (DeepSeek-V4-Pro, DeepSeek-V4-Flash, Deepseek-v3.2, Deepseek-v3.1, Deepseek-r1-0528, Deepseek-v3-0324, …), Zhipu GLM (GLM-5, GLM-5-Turbo, GLM-5.1, GLM-5V-Turbo), Kimi (K2.5, K2.6), MiniMax (M2.5, M2.7) and more. The roster evolves over time, so do not hard-code the list in application code — always discover it at runtime.

⚠️ Common Mini Program mistake: writing createModel("deepseek") / createModel("hunyuan") / createModel("glm") / createModel("kimi") / createModel("minimax") / createModel("custom"). All wrong — those are vendor / model names, not provider / GroupName. The provider must be one of the GroupName values returned by DescribeAIModels. New projects always use the unified "cloudbase" managed group and select the concrete vendor model via the model field.

C. Not in the managed catalog → Custom onboarding

Models involving third-party / self-hosted / OpenAI-compatible endpoints (anything not appearing in A/B) do NOT go through the billing paths above. You must register a Type=custom GroupName via "Custom onboarding" first. See the next section.