docs: update changelog and README for v1.3 release

- Add comprehensive v1.3 changelog with configurable models feature
- Update README description to reflect multi-model support
- Clean up documentation section for better organization
- Ensure first-time visitors see latest capabilities

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

Co-Authored-By: Claude <[email protected]>

Author: PrashamTrivedi

CHANGELOG.md

@@ -8,17 +8,30 @@
   - Updated to use dynamic release names for built binaries
   - Added write permissions for nightly and release jobs
 
-### Latest Changes (since v1.2)
+## [v1.3] - 2025-01-23
 
-- **Configurable Models**: Added support for user-selectable Claude models
+### Added
+- **Configurable Models**: Full support for user-selectable Claude models
   - Support for Claude 3.5 Sonnet, 3.7 Sonnet, 4 Sonnet, and 4 Opus
   - Smart planner model selection based on main model choice
   - Conditional thinking capabilities (disabled for 3.5 Sonnet)
   - Multi-model cost tracking with model-specific pricing
   - New settings commands: `--set-model` and `--list-models`
   - Cost warnings for expensive models (4 Opus)
-- Added new export functionality with prompt ID-based system
+- Enhanced planning functionality with sonnet reasoning capabilities
+- VSCode integration improvements with Claude Code instructions
+- Development conventions documentation and Copilot integration
+- Export functionality with prompt ID-based system
+
+### Changed
+- Improved session management with system info integration
 - Enhanced session logging capabilities
-- Refactored user settings management for improved efficiency
-- Enhanced tool handling system
-- Improved session management
+- Refactored user settings and tool handling system
+- Updated dependencies and tool configuration management
+
+### Fixed
+- Jina API retry logic for 403 responses with X-No-Cache header
+
+### Latest Changes (since v1.3)
+
+No new changes yet.

README.md

@@ -3,7 +3,7 @@
 [![Nightly Build](https://github.com/yourusername/ComputerUseAgent/actions/workflows/nightly.yml/badge.svg)](https://github.com/yourusername/ComputerUseAgent/actions/workflows/nightly.yml)
 
 A sophisticated Deno-based CLI tool that provides AI-powered file editing and
-bash command execution capabilities using Claude 3 API.
+bash command execution capabilities using Claude API with configurable model selection.
 
 ## Features
 
@@ -147,14 +147,8 @@ Key configuration files:
 
 ## Documentation
 
-- See [CHANGELOG.md](CHANGELOG.md) for detailed version history and latest
-  changes
-- Key configuration files:
-  - [`src/config/constants.ts`](src/config/constants.ts): System-wide constants
-    and API settings
-  - [`src/config/logging.ts`](src/config/logging.ts): Logging configuration
-  - [`src/config/tool_config.ts`](src/config/tool_config.ts): Tool configuration
-  - [`deno.json`](deno.json): Deno project configuration
+- See [CHANGELOG.md](CHANGELOG.md) for detailed version history and latest changes
+- [CONVENTIONS.md](CONVENTIONS.md) for development patterns and best practices
 
 ## Development