docs(openrouter-models): sync with openrouter-web changes

[devin-ai-integration]

Summary

Source: openrouter-web#42529 (docs: define catalog vs routing model variants and metadata resolution).

The skill resolves model IDs and looks up their catalog metadata, but said nothing about variant suffixes. The new docs page formalizes the contract that the models API already implements, so this adds three tips bullets:

• Catalog variants (:free, :batch, deprecated :thinking/:extended) are their own entries in GET /api/v1/models; routing variants (:nitro, :floor, :exacto, deprecated :online) never appear in the list and use the base model's metadata.
• Resolution rule: keep the catalog variant, drop routing variants (a/b:free:nitro → a/b:free), and pass the resolved catalog ID to compare-models.ts since the scripts match IDs exactly.
• GET /api/v1/model/{author}/{slug} and the endpoints route apply the rule server-side. A missing catalog variant does not fall back to the base model: 404 on the single-model route, 200 with "endpoints": [] on the endpoints route.

Verified against production: GET /api/v1/models/openai/gpt-4o:nitro/endpoints returns id: "openai/gpt-4o", and GET /api/v1/model/openai/gpt-4o:free returns 404.

Note: the linked docs page (/docs/guides/routing/model-variants/overview) returned 404 at the time of writing, pending the docs deploy of the source PR.

Searched existing PRs; no open models-skill PR (#174, #179, #181) covers variants.

Link to Devin session: https://openrouter.devinenterprise.com/sessions/216f453c646546ccb45debaebd9db0d6
Open in Devin Desktop: https://openrouter.devinenterprise.com/desktop/session/216f453c646546ccb45debaebd9db0d6?variant=devin

[devin-ai-integration]

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---

Original prompt from Automation

You are the public skills sync pipeline. Your job is to scan PRs merged to main on OpenRouterTeam/openrouter-web in the last 24 hours, determine if any changes warrant updating the public agent skills in OpenRouterTeam/skills, and open PRs to the skills repo when updates are needed.

#``# Step 1: Identify relevant merged PRs

Clone both repos:

cd /home/ubuntu/repos/openrouter-web
git fetch origin main
git log --since='24 hours ago' --merges --first-parent origin/main --pretty=format:'%H|%s' --name-only

For each merged PR, collect the list of changed files. Only PRs that touch the paths in the mapping below are relevant. Skip bot commits (devin-ai-integration[bot], Devin AI, GitHub Actions Bot, openrouter[bot], opencode-agent[bot], OpenRouter SDK Bot, Claude, detail-app[bot], forge-the-devex-intern[bot], dependabot[bot]).

If no relevant PRs were merged, post a short message to the #devrel Slack channel (C08LQFVSC7Q) saying no skill-relevant changes were detected today, and exit.

#``# Step 2: Map changed files to affected skills

Use this mapping to determine which public skills are potentially affected:

openrouter-web paths	Affected skill(s) in OpenRouterTeam/skills
sdks/typescript/, packages/llm-interfaces/	openrouter-typescript-sdk, openrouter-agent-migration
services/cfw-*/src/routes/*analytics*, analytics query/response schemas	openrouter-analytics, openrouter-analytics-query, openrouter-analytics-schema
Generation routes, /api/v1/generation	openrouter-generations
Image generation adapters, packages/image-generation/	openrouter-images
supabase/seeds/, model schemas, /api/v1/models route	openrouter-models
OAuth/auth routes, PKCE flow code	openrouter-oauth
STT adapters, services/cfw-stt-api/, /api/v1/audio/transcriptions	openrouter-stt
TTS routes, /api/v1/audio/speech	openrouter-tts
Video adapters, /api/v1/videos	openrouter-video
``@`openr... (3383 chars truncated...)