Kyle Carberry a6697b1b29 fix(chatd): fix PE tool result persistence via fantasy bump (#22996) ...

Fixes Anthropic 400 error on multi-turn conversations with web search:

> web_search tool use with id srvtoolu_... was found without a
corresponding web_search_tool_result block

Provider-executed tool results (e.g. `web_search`) had a nil `Result`
field, which serialized as `"result":null`. Fantasy's
`UnmarshalToolResultOutputContent` couldn't deserialize `null` back, so
the entire assistant message became unreadable after persistence. On the
next LLM call, Anthropic rejected the conversation because
`server_tool_use` had no matching `web_search_tool_result`.

**Fix:** Bump the fantasy fork to e4bbc7bb3054 which returns `nil, nil`
for null `Result` JSON instead of erroring.

**Testing:** Added `integration_test.go` with
`TestAnthropicWebSearchRoundTrip` (requires `ANTHROPIC_API_KEY`) that:
- Sends a query triggering web search
- Verifies the persisted assistant message contains all parts the UI
needs: `tool-call(PE)`, `source`, `tool-result(PE)`, and `text`
- Sends a follow-up to confirm the round-trip works with Anthropic

2026-03-12 16:04:30 +00:00

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chatloop

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chatprompt

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chatprovider

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chatretry

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chattest

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chattool

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chatd_internal_test.go

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chatd_test.go

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chatd.go

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instruction_test.go

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instruction.go

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integration_test.go

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prompt.go

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quickgen.go

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subagent.go

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