Environment Variables

All variables are optional. Constructor parameters take precedence over environment variables.

Variable	Default	Description
`LLM_CHAT_WEB_SEARCH_PROVIDER`	`duckduckgo`	`tavily`, `exaai`, or `duckduckgo`
`LLM_CHAT_WEB_SEARCH_API_KEY`	—	API key (used by Tavily and ExaAI)
`LLM_CHAT_WEB_SEARCH_MAX_RESULTS`	`5`	Default result count per search
`LLM_CHAT_WEB_SEARCH_MAX_CHARS_PER_RESULT`	`2000`	Max characters per result snippet
`LLM_CHAT_WEB_SEARCH_CONCURRENCY`	`3`	Concurrency limit for parallel searches
`LLM_CHAT_WEB_FETCH_CONCURRENCY`	`3`	Concurrency limit for parallel URL fetches
`LLM_CHAT_WEB_MAX_CHARS_PER_FETCH`	`10000`	Default max characters per URL fetch
`LLM_CHAT_WEB_MAX_CHARS_PER_FETCH_LIMIT`	`100000`	Hard limit for per-request `max_chars` override
`LLM_CHAT_WEB_FETCH_TIMEOUT_MS`	`5000`	Timeout in ms for URL fetch requests
`LLM_CHAT_WEB_SEARCH_TIMEOUT_MS`	`4000`	Timeout in ms for search API requests
`LLM_CHAT_WEB_MAX_CONTENT_LENGTH_BYTES`	`10000000`	Max bytes accepted before rejecting the fetch (checked via HEAD)

WebSearchConfiguration

new WebSearchConfiguration(provider?: WebSearchProvider, apiKey?: string)

If omitted, values are read from environment variables. DuckDuckGo is the default provider.

Property	Type	Default	Env Variable	Description
`apiKey`	`string`	`''`	`LLM_CHAT_WEB_SEARCH_API_KEY`	API key for Tavily/ExaAI
`provider`	`WebSearchProvider`	`DuckDuckGo`	`LLM_CHAT_WEB_SEARCH_PROVIDER`	`duckduckgo`, `tavily`, or `exaai`
`maxResults`	`number`	`5`	`LLM_CHAT_WEB_SEARCH_MAX_RESULTS`	Default result count per search
`maxCharsPerResult`	`number`	`2000`	`LLM_CHAT_WEB_SEARCH_MAX_CHARS_PER_RESULT`	Default max chars per result snippet
`searchTimeoutMs`	`number`	`4000`	`LLM_CHAT_WEB_SEARCH_TIMEOUT_MS`	Timeout in ms for search API requests
`concurrency`	`number`	`3`	`LLM_CHAT_WEB_SEARCH_CONCURRENCY`	Concurrency limit for parallel searches

new WebFetchConfiguration()

All values are read from environment variables.

Property	Type	Default	Env Variable	Description
`maxCharsPerFetch`	`number`	`10000`	`LLM_CHAT_WEB_MAX_CHARS_PER_FETCH`	Default max chars per URL fetch
`maxCharsPerFetchLimit`	`number`	`100000`	`LLM_CHAT_WEB_MAX_CHARS_PER_FETCH_LIMIT`	Hard limit for per-request `max_chars` override
`fetchTimeoutMs`	`number`	`5000`	`LLM_CHAT_WEB_FETCH_TIMEOUT_MS`	Timeout in ms for URL fetch requests
`maxContentLengthBytes`	`number`	`10000000`	`LLM_CHAT_WEB_MAX_CONTENT_LENGTH_BYTES`	Max bytes accepted before rejecting the fetch
`concurrency`	`number`	`3`	`LLM_CHAT_WEB_FETCH_CONCURRENCY`	Concurrency limit for parallel URL fetches