Providers

The plugin ships with sixteen built-in providers. Five of them are enabled by default; the rest are off by default and can be opted into with a single line of config. This page lists every default and every field you can override.

Defaults at a glance

The five providers that appear in the dropdown out of the box:

Provider	Strategy	URL template
ChatGPT	`url-prompt`	`https://chatgpt.com/?q={prompt}`
Claude	`clipboard-open`	`https://claude.ai/new`
Gemini	`clipboard-open`	`https://gemini.google.com/app`
GitHub Copilot	`url-prompt`	`https://github.com/copilot?prompt={prompt}`
Perplexity	`url-prompt`	`https://www.perplexity.ai/?q={prompt}`

These five are the largest providers by user base; the goal is to keep the default dropdown short and recognisable. To use any other provider, opt in explicitly (see Opting in to a provider).

The full catalog

Provider	Default	Strategy	URL template	Notes
ChatGPT	✅ on	`url-prompt`	`https://chatgpt.com/?q={prompt}`	Auto-submits
Claude	✅ on	`clipboard-open`	`https://claude.ai/new`	Web prefill broken Oct 2025
Gemini	✅ on	`clipboard-open`	`https://gemini.google.com/app`	No native prefill
GitHub Copilot	✅ on	`url-prompt`	`https://github.com/copilot?prompt={prompt}`	Officially documented
Perplexity	✅ on	`url-prompt`	`https://www.perplexity.ai/?q={prompt}`
Google AI Studio	off	`url-prompt`	`https://ai.studio/prompts/new_chat?prompt={prompt}`
Cursor	off	`inline-content`	`https://cursor.com/link/prompt?text={prompt_with_markdown}`	8 KB cap, falls back to `url-prompt`
DeepSeek	off	`clipboard-open`	`https://chat.deepseek.com/`	No prefill
DuckDuckGo AI Chat	off	`url-prompt`	`https://duckduckgo.com/?q={prompt}&ia=chat&duckai=1`
Grok	off	`url-prompt`	`https://grok.com/?q={prompt}`
HuggingChat	off	`clipboard-open`	`https://huggingface.co/chat/`	No prefill
Kagi Assistant	off	`url-prompt`	`https://kagi.com/assistant?q={prompt}`	Subscribers only
Mistral Le Chat	off	`clipboard-open`	`https://chat.mistral.ai/chat`	No prefill
Phind	off	`clipboard-open`	`https://www.phind.com/agent`	No prefill
T3 Chat	off	`url-prompt`	`https://t3.chat/new?q={prompt}`	Path must be `/new`
You.com	off	`url-prompt`	`https://you.com/search?q={prompt}`

For why each provider uses its assigned strategy, see Concepts: per-provider strategies.

Provider IDs

When configuring providers, use these exact ids:

aistudio — Google AI Studio
chatgpt
claude
copilot — GitHub Copilot
cursor
deepseek
duckduckgo
gemini
grok
huggingchat
kagi
mistral — Mistral Le Chat
perplexity
phind
t3chat
youcom — You.com

Opting in to a provider

Default-off providers must be opted into explicitly. Pass true for the shortest form:

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        cursor: true,
        t3chat: true,
        kagi: true,
      },
    },
  },
})

Or pass an override object — that also opts the provider in:

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        cursor: { maxBytes: 4000 },
      },
    },
  },
})

Disabling providers

Pass false for any provider — including default-on ones — to remove it from the submenu:

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        copilot: false,
        gemini: false,
      },
    },
  },
})

Customising a provider

Pass a ProviderOverride object. Every field is optional; unset fields fall back to the built-in defaults.

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        chatgpt: {
          label: 'ChatGPT (work account)',
          description: 'Send the page to ChatGPT for summary',
          prompt: 'Summarise the linked Acme docs page: {url}',
        },
      },
    },
  },
})

Common customisations

Tighter `inline-content` budget for Cursor

Cursor’s default maxBytes is 8000 (8 KB). To force the fallback for any page over 4 KB:

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        cursor: {
          maxBytes: 4000,
          fallbackStrategy: 'clipboard-open',
        },
      },
    },
  },
})

Force a different strategy

If a provider ships URL prefill in the future, you can switch its strategy without waiting for a plugin release:

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        claude: {
          strategy: 'url-prompt',
          url: 'https://claude.ai/?q={prompt}',
        },
      },
    },
  },
})

Replace icons with your own brand assets

Provider icons are SVGs sourced from Simple Icons (CC0). To use official brand assets:

starlightLlmActions({
  actions: {
    openIn: {
      providers: {
        chatgpt: {
          icon: 'https://example.com/openai-official.svg',
        },
      },
    },
  },
})

icon accepts:

An SVG filename under the package’s icons/ folder (e.g. 'chat-bubble.svg').
An absolute URL.
false — hide the icon.

A handful of providers (Google AI Studio, Grok, Phind, You.com) ship with the generic chat-bubble.svg because Simple Icons doesn’t carry an official mark for them. Override providers.<id>.icon if you have your own asset.

Per-provider prompts

Each provider can use a different prompt:

starlightLlmActions({
  prompt: 'Help me understand this page: {url}',
  actions: {
    openIn: {
      providers: {
        cursor: {
          prompt: 'Use this docs context to scaffold an integration.',
        },
        chatgpt: {
          prompt: 'Summarise in one paragraph: {url}',
        },
      },
    },
  },
})

{md_url} is substituted with the absolute URL of the current page’s .md route (preferred — gives LLMs clean markdown). {url} substitutes the rendered HTML URL instead. {prompt_with_markdown} in the URL template appends the page’s markdown body to the prompt — useful for inline-content providers.

Trademark and branding note

Brand names (ChatGPT, Claude, Gemini, GitHub Copilot, Perplexity, Cursor, T3 Chat, Google AI Studio, DeepSeek, DuckDuckGo, Grok, HuggingChat, Kagi, Mistral, Phind, You.com) and marks remain trademarks of their respective owners and appear nominatively in the plugin only to identify the linked services. No endorsement is implied. The bundled icons are from Simple Icons under CC0; to use official brand assets, override providers.<id>.icon.