feat(gemini): Phase 3 -- tool use / function calling#1635
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This was referenced Mar 13, 2026
fix(gemini): inline_refs_inner depth counter conflates nesting depth with ref-resolution depth
#1638
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Implement native function calling for GeminiProvider via tools + functionDeclarations. - supports_tool_use() returns true - chat_with_tools() builds request with tools[0].functionDeclarations[] and toolConfig.functionCallingConfig.mode = "AUTO" - Schema normalization pipeline: inline_refs (depth 8) -> normalize_schema (allowlist, anyOf/oneOf Option<T> -> nullable) -> uppercase_types; both normalize and uppercase have depth guards - functionCall parts parsed into ToolUseRequest with UUID-generated IDs - Tool results sent as functionResponse parts in user message with name lookup from conversation history (warns on lookup miss) - Empty declarations fall back to regular chat() - 26 new unit tests covering schema conversion, response parsing, message conversion, and edge cases Part of #1592, closes #1595.
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This was referenced Mar 13, 2026
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Part of #1592, closes #1595.
Summary
supports_tool_use()returnstruechat_with_tools()sendstools[0].functionDeclarations[]withtoolConfig.functionCallingConfig.mode = "AUTO"inline_refs(depth 8) →normalize_schema(allowlist +anyOf/oneOfOption →nullable) →uppercase_types; bothnormalize_schemaanduppercase_typeshave depth guards (16 and 32 respectively)functionCallparts parsed intoChatResponse::ToolUsewith UUID-generated IDs (Gemini provides none)functionResponseparts in user message; tool name resolved from conversation history viabuild_tool_name_lookup(); warns on lookup misschat()Test plan
cargo +nightly fmt --checkcargo clippy --workspace --features full -- -D warningscargo nextest run --config-file .github/nextest.toml --workspace --features full --lib --bins— 5213 passed