Kyle Carberry 57dc23f603 feat(chatd): add provider-native web search tools to chats (#22909) ...

## What

Adds provider-native web search tools to the chat system. Anthropic,
OpenAI, and Google all offer server-side web search — this wires them up
as opt-in per-model config options using the existing
`ChatModelProviderOptions` JSONB column (no migration).

Web search is **off by default**.

## Config

Set `web_search_enabled: true` in the model config provider options:

```json
{
  "provider_options": {
    "anthropic": {
      "web_search_enabled": true,
      "allowed_domains": ["docs.coder.com", "github.com"]
    }
  }
}
```

Available options per provider:

- **Anthropic**: `web_search_enabled`, `allowed_domains`,
`blocked_domains`
- **OpenAI**: `web_search_enabled`, `search_context_size`
(`low`/`medium`/`high`), `allowed_domains`
- **Google**: `web_search_enabled`

## Backend

- `codersdk/chats.go` — new fields on the per-provider option structs
- `coderd/chatd/chatd.go` — `buildProviderTools()` reads config, creates
`ProviderDefinedTool` entries (uses `anthropic.WebSearchTool()` helper
from fantasy)
- `coderd/chatd/chatloop/chatloop.go` — `ProviderTools` on `RunOptions`,
merged into `Call.Tools`. Provider-executed tool calls skip local
execution. `StreamPartTypeToolResult` with `ProviderExecuted: true` is
accumulated inline (matching fantasy's own agent.go pattern) instead of
post-stream synthesis.
- `coderd/chatd/chatprompt/` — `MarshalToolResult` carries
`ProviderMetadata` through DB persistence so multi-turn round-trips work
(Anthropic needs `encrypted_content` back)

## Frontend

- Source citations render **inline** at the tool-call position (not
bottom-of-message), using `ToolCollapsible` so they look like other tool
cards — collapsed "Searched N results" with globe icon, expand to see
source pills
- Provider-executed tool calls/results are hidden from the normal tool
card UI
- Tool-role messages with only provider-executed results return `null`
(no empty bubble)
- Both persisted (messageParsing.ts) and streaming (streamState.ts)
paths group consecutive `source` parts into a single `{ type: "sources"
}` render block

## Fantasy changes

The fantasy fork (`kylecarbs/fantasy` branch `cj/go1.25`) has the
Anthropic tool code merged in, but will hopefully go upstream from:
https://github.com/charmbracelet/fantasy/pull/163

2026-03-11 21:33:15 +00:00

..

db2sdk_test.go

refactor: remove reasoning title extraction from chat pipeline (#22926)

2026-03-11 11:01:26 +00:00

db2sdk.go

feat(chatd): add provider-native web search tools to chats (#22909)

2026-03-11 21:33:15 +00:00