feat: add Claude-Gemini collaboration and chat capabilities

- Add collaboration demo showing dynamic context requests
- Implement chat tool for general conversations and brainstorming
- Add tool selection guide with clear boundaries
- Introduce models configuration system
- Update prompts for better tool descriptions
- Refactor server to remove redundant functionality
- Add comprehensive tests for collaboration features
- Enhance base tool with collaborative features

This enables Claude to request additional context from Gemini
during tool execution, improving analysis quality and accuracy.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

tools/models.py

@@ -0,0 +1,59 @@
+"""
+Data models for tool responses and interactions
+"""
+
+from pydantic import BaseModel, Field
+from typing import Literal, Optional, Dict, Any, List
+
+
+class ToolOutput(BaseModel):
+    """Standardized output format for all tools"""
+
+    status: Literal["success", "error", "requires_clarification"] = "success"
+    content: str = Field(..., description="The main content/response from the tool")
+    content_type: Literal["text", "markdown", "json"] = "text"
+    metadata: Optional[Dict[str, Any]] = Field(default_factory=dict)
+
+
+class ClarificationRequest(BaseModel):
+    """Request for additional context or clarification"""
+
+    question: str = Field(..., description="Question to ask Claude for more context")
+    files_needed: Optional[List[str]] = Field(
+        default_factory=list, description="Specific files that are needed for analysis"
+    )
+    suggested_next_action: Optional[Dict[str, Any]] = Field(
+        None,
+        description="Suggested tool call with parameters after getting clarification",
+    )
+
+
+class DiagnosticHypothesis(BaseModel):
+    """A debugging hypothesis with context and next steps"""
+
+    rank: int = Field(..., description="Ranking of this hypothesis (1 = most likely)")
+    confidence: Literal["high", "medium", "low"] = Field(
+        ..., description="Confidence level"
+    )
+    hypothesis: str = Field(..., description="Description of the potential root cause")
+    reasoning: str = Field(..., description="Why this hypothesis is plausible")
+    next_step: str = Field(
+        ..., description="Suggested action to test/validate this hypothesis"
+    )
+
+
+class StructuredDebugResponse(BaseModel):
+    """Enhanced debug response with multiple hypotheses"""
+
+    summary: str = Field(..., description="Brief summary of the issue")
+    hypotheses: List[DiagnosticHypothesis] = Field(
+        ..., description="Ranked list of potential causes"
+    )
+    immediate_actions: List[str] = Field(
+        default_factory=list,
+        description="Immediate steps to take regardless of root cause",
+    )
+    additional_context_needed: Optional[List[str]] = Field(
+        default_factory=list,
+        description="Additional files or information that would help with analysis",
+    )