docs: prepare 0.2.1 release notes

Author: firede

CHANGELOG.md

@@ -2,6 +2,16 @@
 
 All notable changes to this project are documented in this file.
 
+## [0.2.1] - 2026-02-19
+
+### Added
+- Added `--version`/`-v` output with build metadata (`version`, `commit`, `date`) and wired release-time injection via GoReleaser ldflags.
+- Added Agent Skills support files at `skills/agent-fetch` with installation guidance and usage instructions for agent-driven workflows.
+
+### Changed
+- Added CI verification for the version flag to prevent regressions in release metadata output.
+- Documented Chrome/Chromium runtime dependency for `browser` mode and `auto` fallback in README and skill docs.
+
 ## [0.2.0] - 2026-02-18
 
 ### Added
@@ -18,4 +28,3 @@ All notable changes to this project are documented in this file.
 - Honored `text/markdown` responses directly (including MDX-like content) to avoid dropping sections during fallback conversion.
 - Improved fallback behavior for HTTP status errors in `auto` mode.
 - Tightened markdown detection and related review cleanups.
-