V2: add first-class search provider integrations #35038

Summary

V2 should treat web search as a first-class capability instead of one-off provider-specific tools. The search providers should plug into the integration API, with first-party support for the major providers so users can switch providers by configuring the relevant keys or by selecting keyless/no-auth providers when supported.

Context

Aiden asked whether OpenCode should support this kind of provider selection, using Firecrawl's web search/web fetch request as the concrete example: #32600.

Theo agreed this should be V2 work: search should be a top-level concept, provider implementations should fit into the integration API, and OpenCode should probably ship built-in support for popular providers.

Follow-up: this should explicitly include providers that do not require authentication. Firecrawl can be used keylessly, and other providers may have similar no-auth modes.

Source Discord discussion: https://discord.com/channels/1391832426048651334/1447692703549755466/1522385726904340511

Desired shape

• Add a top-level V2 concept/API for search.
• Model search providers as integration-backed implementations of that capability.
• Provide built-in support for popular search providers.
• Allow users/workspaces to switch providers by configuring provider keys.
• Support keyless/no-auth providers and provider modes, not just BYOK/authed integrations.
• Avoid making every provider a bespoke tool path.

Related issues

• [FEATURE]: Firecrawl web search + web fetch provider #32600 — Firecrawl web search + web fetch provider
• [FEATURE]:add Ninelayer as a web search provider #33209 — Ninelayer as a web search provider
• [FEATURE]: Add TinyFish BYOK web search and fetch #29927 — TinyFish BYOK web search and fetch
• [FEATURE]: Use provider-hosted web search when available #10704 — provider-hosted web search
• [FEATURE]:Support DeepSeek Native Web Search via Anthropic-Compatible API #32273 — DeepSeek native web search
• v2: internal tool plugins expose gaps in the public plugin API #34957 — public plugin API gaps that internal tool plugins expose