# Multi-Provider Tool Integration Progress

**Started:** 2025-01-07
**Last Updated:** 2025-01-07

## Overview
Implementing consistent multi-round tool execution across Anthropic, OpenAI, and Gemini providers.

## Status Summary

| Phase | Description | Status |
|-------|-------------|--------|
| Phase 1 | ToolResult Enhancement | COMPLETE |
| Phase 2 | OpenAI Multi-Tool Support | COMPLETE |
| Phase 3 | Gemini Function Response Fix | COMPLETE |
| Phase 4 | cnctd.world Server Integration | COMPLETE |
| Phase 5 | Testing Matrix | NOT STARTED |

---

## Phase 1: ToolResult Enhancement (cnctd_ai) - COMPLETE

### Changes Made
1. [x] Added `function_name: Option<String>` field to `ToolResult` with `#[serde(skip_serializing_if = "Option::is_none")]`
2. [x] Updated `ToolResult::new()` - sets `function_name: None`
3. [x] Updated `ToolResult::error()` - sets `function_name: None`
4. [x] Added `ToolResult::with_name()` constructor
5. [x] Added `ToolResult::error_with_name()` constructor
6. [x] Added `ToolResult::set_name()` builder method

### Files Modified
- `src/message.rs`

---

## Phase 2: OpenAI Multi-Tool Support (cnctd_ai) - COMPLETE

### Changes Made
1. [x] Updated `complete()` - checks `tool_results` before `tool_call_id`, emits multiple Tool messages
2. [x] Updated `stream()` - same changes

### Key Change
When a user message has `tool_results` array, we now expand it into multiple `ChatCompletionRequestMessage::Tool` messages (one per result), matching OpenAI's API requirement.

### Files Modified
- `src/client/openai.rs`

---

## Phase 3: Gemini Function Response Fix (cnctd_ai) - COMPLETE

### Changes Made
1. [x] Updated `complete()` - checks `tool_results` first, uses `function_name` field
2. [x] Updated `stream()` - same changes

### Key Change
When constructing `functionResponse` parts for Gemini, we now use the `function_name` from `ToolResult` instead of the broken heuristic that looked at `msg.tool_uses` (which is on assistant messages, not user messages).

### Files Modified
- `src/client/gemini.rs`

---

## Phase 4: cnctd.world Server Integration - COMPLETE

### Changes Made
1. [x] Updated `results_to_messages()` to use `ToolResult::with_name()` and `ToolResult::error_with_name()`
2. [x] Added documentation explaining the Gemini compatibility requirement

### Key Change
Tool results now include the function name (`tool_name` from execution results), enabling proper `functionResponse` construction for Gemini.

### Files Modified
- `server/src/modules/conversation/tool_executor.rs`
- `server/Cargo.toml` (temporarily using local path for cnctd_ai)

---

## Phase 5: Testing Matrix - NOT STARTED

### Test Matrix
| Scenario | Anthropic | OpenAI | Gemini |
|----------|-----------|--------|--------|
| Single tool call | ? | ? | ? |
| Multiple parallel tools | ? | ? | ? |
| Multi-round sequential | ? | ? | ? |
| Tool error handling | ? | ? | ? |

### Testing Notes
- Need to verify multi-tool conversations work with each provider
- Test that function names are correctly passed through
- Test error handling paths

---

## Deployment Checklist

### Before Deployment
1. [ ] Publish cnctd_ai 0.1.11 to crates.io (with ToolResult.function_name)
2. [ ] Update cnctd.world/server Cargo.toml to use published version
3. [ ] Run full test suite
4. [ ] Test with each provider in staging

### Files to Commit
- cnctd_ai:
  - `src/message.rs`
  - `src/client/openai.rs`
  - `src/client/gemini.rs`
  - `MULTI_PROVIDER_TOOL_PROGRESS.md`

- cnctd.world:
  - `server/src/modules/conversation/tool_executor.rs`
  - `server/Cargo.toml`

---

## Session Log

### 2025-01-07 - Session 1
- Read plan document: `docs/architecture/MULTI_PROVIDER_TOOL_INTEGRATION.md`
- Reviewed current code for all providers
- Implemented Phase 1: ToolResult enhancement
- Implemented Phase 2: OpenAI multi-tool support
- Implemented Phase 3: Gemini function response fix
- Implemented Phase 4: cnctd.world server integration
- All phases compile successfully
- Ready for testing and deployment

---

## Additional Fix: Gemini Schema Sanitization (2025-01-07)

### Problem
Gemini API rejected tool schemas with HTTP 400 errors:
- `Unknown name "$schema"`
- `Unknown name "additionalProperties"`
- `"type" cannot be list` (for `["string", "null"]`)

### Root Cause
MCP tools use standard JSON Schema which includes properties that Gemini's function declaration format doesn't support.

### Solution
Added `sanitize_schema_for_gemini()` function in `src/client/gemini.rs` that:
1. Recursively removes `$schema` fields
2. Recursively removes `additionalProperties` fields
3. Converts `type: ["string", "null"]` arrays to single string type (first non-null)

### Files Modified
- `src/client/gemini.rs` - Added sanitization function and updated both `complete()` and `stream()` to use it

### Status
- Code compiles successfully
- Ready for testing

## Additional Fix: Gemini 3 Tool Incompatibility (2025-01-07)

### Problem
Gemini 3 API returned: `"Tool use with function calling is unsupported"`

### Root Cause
Gemini 3 does **NOT** support combining function calling (MCP tools/custom functions) with built-in tools (Google Search, Code Execution, etc.) in the same request.

### Solution
Added detection for Gemini 3 models in both `complete()` and `stream()`:
- `is_gemini_3 = config.model.contains("gemini-3")`
- `has_function_declarations = request.tools.as_ref().map(|t| !t.is_empty()).unwrap_or(false)`
- When both are true, skip adding built-in tools (prioritize MCP function declarations)

### Files Modified
- `src/client/gemini.rs` - Added Gemini 3 detection and conditional tool handling

### Impact
- MCP tools (function declarations) take priority over built-in tools for Gemini 3
- Built-in tools still work for Gemini 3 if no MCP tools are present
- Older Gemini models (1.5, 2.0, 2.5) can still use both together
