Initial commit of Gemini Code CLI

This commit introduces the initial codebase for the Gemini Code CLI, a command-line interface designed to facilitate interaction with the Gemini API for software engineering tasks.

The code was migrated from a previous git repository as a single squashed commit.

Core Features & Components:

*   **Gemini Integration:** Leverages the `@google/genai` SDK to interact with the Gemini models, supporting chat history, streaming responses, and function calling (tools).
*   **Terminal UI:** Built with Ink (React for CLIs) providing an interactive chat interface within the terminal, including input prompts, message display, loading indicators, and tool interaction elements.
*   **Tooling Framework:** Implements a robust tool system allowing Gemini to interact with the local environment. Includes tools for:
    *   File system listing (`ls`)
    *   File reading (`read-file`)
    *   Content searching (`grep`)
    *   File globbing (`glob`)
    *   File editing (`edit`)
    *   File writing (`write-file`)
    *   Executing bash commands (`terminal`)
*   **State Management:** Handles the streaming state of Gemini responses and manages the conversation history.
*   **Configuration:** Parses command-line arguments (`yargs`) and loads environment variables (`dotenv`) for setup.
*   **Project Structure:** Organized into `core`, `ui`, `tools`, `config`, and `utils` directories using TypeScript. Includes basic build (`tsc`) and start scripts.

This initial version establishes the foundation for a powerful CLI tool enabling developers to use Gemini for coding assistance directly in their terminal environment.

---
Created by yours truly: __Gemini Code__

1 files changed, 73 insertions, 0 deletions

diff --git a/packages/cli/src/tools/BaseTool.ts b/packages/cli/src/tools/BaseTool.ts
new file mode 100644
index 00000000..1ab7fbf1
--- /dev/null
+++ b/packages/cli/src/tools/BaseTool.ts
@@ -0,0 +1,73 @@
+import type { FunctionDeclaration, Schema } from '@google/genai';
+import { ToolResult } from './ToolResult.js';
+import { Tool } from './Tool.js';
+import { ToolCallConfirmationDetails } from '../ui/types.js';
+
+/**
+ * Base implementation for tools with common functionality
+ */
+export abstract class BaseTool<TParams = unknown, TResult extends ToolResult = ToolResult> implements Tool<TParams, TResult> {
+  /**
+   * Creates a new instance of BaseTool
+   * @param name Internal name of the tool (used for API calls)
+   * @param displayName User-friendly display name of the tool
+   * @param description Description of what the tool does
+   * @param parameterSchema JSON Schema defining the parameters
+   */
+  constructor(
+    public readonly name: string,
+    public readonly displayName: string,
+    public readonly description: string,
+    public readonly parameterSchema: Record<string, unknown>
+  ) {}
+
+  /**
+   * Function declaration schema computed from name, description, and parameterSchema
+   */
+  get schema(): FunctionDeclaration {
+    return {
+      name: this.name,
+      description: this.description,
+      parameters: this.parameterSchema as Schema
+    };
+  }
+
+  /**
+   * Validates the parameters for the tool
+   * This is a placeholder implementation and should be overridden
+   * @param params Parameters to validate
+   * @returns An error message string if invalid, null otherwise
+   */
+  invalidParams(params: TParams): string | null {
+    // Implementation would typically use a JSON Schema validator
+    // This is a placeholder that should be implemented by derived classes
+    return null;
+  }
+
+  /**
+   * Gets a pre-execution description of the tool operation
+   * Default implementation that should be overridden by derived classes
+   * @param params Parameters for the tool execution
+   * @returns A markdown string describing what the tool will do
+   */
+  getDescription(params: TParams): string {
+    return JSON.stringify(params);
+  }
+
+  /**
+   * Determines if the tool should prompt for confirmation before execution
+   * @param params Parameters for the tool execution
+   * @returns Whether or not execute should be confirmed by the user.
+   */
+  shouldConfirmExecute(params: TParams): Promise<ToolCallConfirmationDetails | false> {
+    return Promise.resolve(false);
+  }
+
+  /**
+   * Abstract method to execute the tool with the given parameters
+   * Must be implemented by derived classes
+   * @param params Parameters for the tool execution
+   * @returns Result of the tool execution
+   */
+  abstract execute(params: TParams): Promise<TResult>;
+}
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