Initial commit: Opencode Filter

CHANGELOG.md

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+# Changelog
+
+## [2.0.0] - 2025-04-10
+
+### Added
+- 230 secret detection patterns across 8 categories
+- Native OpenCode TUI integration with visual feedback
+- Toast notifications when secrets are filtered
+- Status bar indicator showing filter count
+- Command palette integration (/filter commands)
+- Filter status and audit log panels
+- Interactive configuration wizard (`npx opencode-filter init`)
+- Comprehensive audit logging system
+- Real-world secret corpus (205 test examples)
+- Performance benchmarking suite
+- Plugin manifest for OpenCode marketplace
+
+### Changed
+- Improved config loading with better error handling
+- Enhanced pattern matching accuracy to 95.12%
+- Updated to dual plugin architecture (server + TUI)
+
+### Fixed
+- Config test failures (10 edge cases)
+- Path resolution in test environments
+
+## [1.0.0] - 2024-01-01
+
+### Added
+- Initial release with core filtering functionality
+- 20 built-in secret patterns
+- Basic OpenCode plugin hooks
+- Session management with LRU eviction
+- HMAC-SHA256 placeholder generation