Add Model Skill

You add a new model entry to apps/sim/providers/models.ts. Every numeric and capability claim MUST be derived from a live web fetch of the provider's official docs in this session. Marketing emails, training data, and your prior knowledge are not sources of truth — they routinely hallucinate pricing, context windows, and capability lists.

Hard rules (do not skip)

1. Live-fetch or refuse. Before writing the entry, you must successfully WebFetch the provider's official models/pricing page in this session. If you cannot reach an authoritative source for any field, mark the field as UNVERIFIED in your report and ask the user before guessing. Never fill in pricing or capabilities from memory.
2. Two-source rule for pricing. Cross-check input/output/cached pricing against at least one secondary source (OpenRouter, Artificial Analysis, CloudPrice, mem0, intuitionlabs). If sources disagree, the provider's own docs win — but flag the disagreement.
3. Read the code before setting capability flags. Capability flags are dead unless the provider's implementation under apps/sim/providers/{provider}/ actually consumes them (see Consumption Matrix below). Setting a flag the provider ignores is a silent bug.
4. Cite every fact. Your final report must list the URL each value came from. No URL → not verified.

Your Task

1. Identify provider and model id from user args
2. Live-fetch official docs + pricing page + capability/parameter pages + at least one secondary source
3. Apply the Consumption Matrix to know which capability flags are real
4. Read 2-3 sibling entries in models.ts and match their pattern exactly
5. Check the repo-side touchpoints that are NOT data-driven (hosted-key billing, tests, provider code)
6. Insert the entry, run bun run lint, print the verification report

Step 1: Live source-of-truth lookup

In priority order — fetch all that exist for the provider:

Secondary verification (use at least one): openrouter.ai/<provider>/<model>, artificialanalysis.ai/models/<model>, cloudprice.net/models/<provider>-<model>.

Use a precise WebFetch prompt: "Extract for {model_id}: exact model id string, context window in tokens, input price per 1M, cached input price per 1M, output price per 1M, max output tokens, supported reasoning effort levels, accepted parameters (temperature, top_p), release date. Do not fill in fields you cannot find."

Step 2: Consumption Matrix (which provider honors which capability)

Always re-grep before relying on this table — the codebase moves:

rg "reasoningEffort|reasoning_effort" apps/sim/providers/<provider>/
rg "verbosity" apps/sim/providers/<provider>/
rg "request\.thinking|thinking:" apps/sim/providers/<provider>/
rg "supportsNativeStructuredOutputs|nativeStructuredOutputs" apps/sim/providers/<provider>/

Step 3: Match the provider's existing entry pattern

Open apps/sim/providers/models.ts, find PROVIDER_DEFINITIONS[<provider>].models, read 2-3 sibling entries. Match field order exactly:

{
  id: '<exact-api-id>',
  pricing: {
    input: <number>,
    cachedInput: <number>,  // omit if provider doesn't offer caching
    output: <number>,
    updatedAt: '<today YYYY-MM-DD>',
  },
  capabilities: {
    // only flags the provider actually consumes — see matrix
  },
  contextWindow: <tokens>,
  releaseDate: '<YYYY-MM-DD>',
  recommended: true,        // only if new flagship; ask user before swapping
  speedOptimized: true,     // only on smallest/fastest tier
  deprecated: true,         // only on retired models
}

Reseller providers (azure-openai, azure-anthropic, vertex, bedrock, openrouter)

Model id MUST be prefixed: azure/, azure-anthropic/, vertex/, bedrock/, openrouter/. Pricing usually mirrors the upstream provider but verify on the reseller's own pricing page.

Insertion order

Within a family, newest first (matches existing convention: GPT-5.5 above GPT-5.4 above GPT-5.2). Across families, biggest/flagship at top of list.

recommended / speedOptimized

• At most one or two recommended: true per provider — the current flagship(s).
• If you're adding a new flagship, ask the user before removing recommended from the previous flagship. Never silently flip it.
• speedOptimized: true only on the smallest/fastest tier (nano, flash-lite, haiku class).

Step 4: Repo-side touchpoints beyond the entry

Adding the models.ts entry is most of the job because nearly every consumer is data-driven and picks the model up automatically: the ~40 query helpers in models.ts / providers/utils.ts, the public /models catalog (app/(landing)/models/utils.ts iterates PROVIDER_DEFINITIONS), the agent-block model dropdown, and copilot's isKnownModelId / suggestModelIdsForUnknownModel validation. The touchpoints below are the exceptions — they are not data-driven, so check each one.

Hosted = auto-billed, by provider

getHostedModels() in apps/sim/providers/models.ts returns every model under openai, anthropic, and google:

export function getHostedModels(): string[] {
  return [
    ...getProviderModels('openai'),
    ...getProviderModels('anthropic'),
    ...getProviderModels('google'),
  ]
}

So a model added to any of those three providers is automatically served with Sim's rotating hosted key and billed to the workspace via shouldBillModelUsage() (providers/utils.ts). Before you insert:

• If the model should be BYOK-only / never-billed, do NOT drop it under openai/anthropic/google as-is — that silently enrolls it in hosted billing. Confirm hosting/billing intent with the user. (Precedent: Ollama Cloud is a deliberately separate isReseller provider specifically to stay BYOK-only/never-billed.)
• If the model should be hosted, the deployment must actually have a key for it — the provider's {PREFIX}_COUNT / {PREFIX}_1..N env vars must be set, or hosted runs fail at execution time.
• State the hosted/billing status explicitly in the verification report.

Tests with hardcoded model IDs

bun run lint does not run tests. A few tests assert specific model IDs and can break or need updating when you touch a hosted or flagship model:

• apps/sim/providers/utils.test.ts — asserts membership of getHostedModels() / shouldBillModelUsage()
• apps/sim/providers/index.test.ts and serializer tests — reference concrete model IDs

rg "<new-model-id>|getHostedModels|shouldBillModelUsage" apps/sim/providers/*.test.ts

If anything matches, run the affected provider tests and update assertions as needed.

New API behavior is NOT data-driven

The Consumption Matrix (Step 2) tells you which capability flags are honored by existing provider code. But if the new model needs net-new request handling that the provider doesn't implement yet — a new beta header (e.g. Anthropic's anthropic-beta structured-outputs header in anthropic/index.ts), a new thinking/reasoning encoding, a Responses-API quirk — you must edit apps/sim/providers/<provider>/core.ts / index.ts. Setting a flag whose behavior isn't implemented is a silent no-op. When you do edit provider code, reuse the shared helpers rather than hand-rolling: streaming responses are assembled via createStreamingExecution (@/providers/streaming-execution) and tool schemas via adaptOpenAIChatToolSchema / adaptAnthropicToolSchema (@/providers/tool-schema-adapter).

Thinking/reasoning models: streamed visibility + generated docs

If the entry has capabilities.thinking or capabilities.reasoningEffort, it appears in the autogenerated "Streamed thinking and tool calls" table on the Agent block docs page:

• Anthropic-family (anthropic, azure-anthropic) thinking models MUST declare capabilities.thinking.streamed ('full' | 'summary' | 'none'). Verify against Anthropic's current thinking-display and streaming docs: visible thinking returned by the API is summarized, including when Sim opts models whose default display is omitted into display: 'summarized' on agent-events runs, so current Claude thinking models use 'summary'. Use 'full' only if future official API docs explicitly guarantee raw thinking deltas. bun run agent-stream-docs:check (CI) fails if the field is missing.
• Other families usually omit the field and inherit the provider default in getThinkingStreamVisibility (Gemini/OpenAI → summaries; Bedrock/Meta → none; OpenAI-compatible vendors with documented reasoning fields → full deltas). Set it explicitly only when the model deviates from its family.
• After inserting the entry, run bun run agent-stream-docs:generate and commit the regenerated apps/docs/content/docs/en/workflows/blocks/agent.mdx — CI diffs it.
• Include the streamed value (with its source URL) in the verification report when set.

Wrong family entirely?

• Embedding or rerank model → it does NOT go in the models[] array. Use EMBEDDING_MODEL_PRICING / RERANK_MODEL_PRICING in models.ts instead.
• Brand-new provider (not just a new model under an existing one) → much larger surface: add the id to ProviderId in providers/types.ts, a registry entry in providers/registry.ts, a provider implementation under providers/<id>/ (assemble streaming responses with createStreamingExecution and wrap tool schemas with the @/providers/tool-schema-adapter helpers), an icon in components/icons.tsx, and the PROVIDER_DEFINITIONS block. That is beyond this skill — tell the user.

Step 5: Write, lint

bun run lint
bun run agent-stream-docs:generate   # only when the entry has thinking/reasoningEffort

Lint must pass before reporting done. If lint fails: read the error, fix the syntax/typing issue in the entry you just wrote (do not delete the entry — it's the work product), re-run lint, and note the fix in a "Lint adjustments" line in the verification report. Never report done with lint failing.

Step 6: Verification report (mandatory format)

End with this exact structure:

### Verification — <model-id>

| Field | Value | Source URL | Status |
|---|---|---|---|
| `id` | `grok-4.3` | https://docs.x.ai/... | ✓ verified |
| `contextWindow` | 1,000,000 | https://docs.x.ai/... + https://openrouter.ai/... | ✓ verified (2 sources agree) |
| `input` | $1.25/M | https://docs.x.ai/... | ✓ verified |
| `cachedInput` | $0.20/M | https://cloudprice.net/... | ⚠️ single source |
| `output` | $2.50/M | https://docs.x.ai/... + https://openrouter.ai/... | ✓ verified |
| `capabilities.temperature` | `{ min: 0, max: 1 }` | matches sibling entries | — pattern-match only |
| `capabilities.reasoningEffort` | NOT SET | provider docs say API rejects it for this model | ✓ correctly omitted |
| `releaseDate` | 2026-04-30 | https://docs.x.ai/... announcement | ✓ verified |
| hosted/billing | BYOK-only (xai not in `getHostedModels`) | `providers/models.ts` | — confirmed intent |

**Disagreements**
- _none_ OR _OpenRouter says X, provider docs say Y — used Y per provider rule_

**Unverified fields**
- _none_ OR _<field>: could not find authoritative source — left as <X> based on sibling pattern; please confirm_

If any row is ⚠️ single-source or "unverified," state it plainly to the user and ask whether to proceed. Do not silently merge.

What to do if you cannot find a source

Omitting a field is not the same as verifying it. Any field you cannot confirm from a live fetch must be both omitted from the entry and listed as ❓ UNVERIFIED in the report's "Unverified fields" section, with the URLs you attempted. Then ask the user to confirm before merging.

• Pricing missing → do NOT guess. Omit cachedInput. Mark ❓ UNVERIFIED. Ask the user for the price or the docs URL.
• Context window missing → do NOT guess. Ask the user; mark ❓ UNVERIFIED.
• Release date missing → omit the field; mark ❓ UNVERIFIED in the report.
• Capability uncertain → omit the flag (safer than setting a dead/wrong one); mark ❓ UNVERIFIED so the user knows you didn't confirm it either way.

Anti-patterns this skill exists to prevent

• ❌ Trusting a marketing email (xAI's grok-4.3 email claimed "3 reasoning efforts" but the API rejects reasoning_effort — verified by official docs only)
• ❌ Setting nativeStructuredOutputs: true on xai/openai/google (dead — only anthropic/fireworks/openrouter consume it)
• ❌ Setting thinking on non-Anthropic/non-Gemini providers
• ❌ Adding an Anthropic-family thinking model without thinking.streamed (CI agent-stream-docs:check fails), or skipping bun run agent-stream-docs:generate after adding any thinking/reasoning model
• ❌ Setting verbosity on anything other than OpenAI gpt-5.x
• ❌ Copying pricing.updatedAt from a sibling instead of using today's date
• ❌ Inventing a cachedInput price by dividing input by 4 (varies by provider — find an explicit number)
• ❌ Stamping recommended: true on the new model without removing it from the previous flagship
• ❌ Adding a BYOK-only model under openai/anthropic/google (silently enrolls it in hosted billing via getHostedModels())
• ❌ Reporting "done" after only bun run lint when you touched a hosted (openai/anthropic/google) or flagship model with assertions in providers/utils.test.ts
• ❌ Reporting "done" with any UNVERIFIED row in the table