Implement Fetch Web Tool for HTTP content retrieval

CHANGELOG.md

@@ -8,6 +8,16 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+- **Fetch Web Tool** - HTTP web content fetching capability (ADR 0007)
+  - Direct URL content fetching with multiple format support (text, JSON, HTML, raw)
+  - Configurable timeout (default 30s, max 5min) and size limits (default 1MB, max 50MB)
+  - Custom HTTP headers support for authentication and API access
+  - Redirect handling with configurable behavior
+  - Security controls: URL validation, response size limits, timeout enforcement
+  - Model-agnostic design - works with all LLM providers (Gemini, OpenAI, Ollama, etc.)
+  - Comprehensive unit tests with 22 test cases covering all functionality
+  - Registered in Search & Discovery category with priority 1 (complementary to Google Search)
+  - New `web` package in `tools/` for web content operations
 - Google Search tool integration via ADK's `geminitool.GoogleSearch`
   - Enables web search capabilities for the agent
   - Works with Gemini 2.0+ models
@@ -17,8 +27,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Comprehensive unit tests for Google Search tool
 - Documentation in TOOL_DEVELOPMENT.md for using ADK built-in tools
 
-## [Unreleased]
-
 ## [0.2.1] - 2025-11-14
 
 ### Fixed

README.md

@@ -14,7 +14,7 @@
 ### Key Features
 
 - **🤖 Multi-Model Support**: Seamlessly switch between Gemini, OpenAI, and Vertex AI
-- **🛠️ 21 Built-in Tools**: File operations, code editing, execution, web search, and more
+- **🛠️ 22 Built-in Tools**: File operations, code editing, execution, web search, web fetching, and more
 - **🔌 MCP Integration**: Unlimited extensibility via Model Context Protocol
 - **💾 Session Persistence**: Maintain context across conversations with automatic history
 - **⚡ Streaming Responses**: Real-time output as the model thinks and executes

adk-code/go.mod

@@ -12,6 +12,7 @@ require (
 	github.com/ncruces/go-sqlite3/gormlite v0.30.1
 	github.com/ollama/ollama v0.12.11
 	github.com/openai/openai-go/v3 v3.8.1
+	golang.org/x/net v0.46.0
 	golang.org/x/term v0.36.0
 	google.golang.org/adk v0.1.0
 	google.golang.org/genai v1.20.0
@@ -68,7 +69,6 @@ require (
 	go.opentelemetry.io/otel/sdk v1.38.0 // indirect
 	go.opentelemetry.io/otel/trace v1.38.0 // indirect
 	golang.org/x/crypto v0.43.0 // indirect
-	golang.org/x/net v0.46.0 // indirect
 	golang.org/x/oauth2 v0.32.0 // indirect
 	golang.org/x/sys v0.38.0 // indirect
 	golang.org/x/text v0.30.0 // indirect

adk-code/tools/tools.go

@@ -28,6 +28,7 @@ import (
 	"adk-code/tools/file"
 	"adk-code/tools/search"
 	"adk-code/tools/v4a"
+	"adk-code/tools/web"
 	"adk-code/tools/websearch"
 	"adk-code/tools/workspace"
 )
@@ -104,6 +105,10 @@ type (
 	ListAgentsInput  = agents.ListAgentsInput
 	ListAgentsOutput = agents.ListAgentsOutput
 	AgentEntry       = agents.AgentEntry
+
+	// Web tool types
+	FetchWebInput  = web.FetchWebInput
+	FetchWebOutput = web.FetchWebOutput
 )
 
 // Re-export category constants for tool classification
@@ -160,6 +165,9 @@ var (
 
 	// Web search tools
 	NewGoogleSearchTool = websearch.NewGoogleSearchTool
+
+	// Web tools
+	NewFetchWebTool = web.NewFetchWebTool
 )
 
 // Re-export registry functions for tool access and registration