v1.4.0

What's new?

• Removed plugin components that aren't supported by OpenCode's plugin runtime — deleted the dependency-detective, impact-investigator, and source-scout agents, all seven constellation-* skills, and the unused CLAUDE.md/GEMINI.md files
• Streamlined src/plugins/constellation.ts and rewrote README.md and AGENTS.md to reflect the leaner plugin surface
• Added .npmignore to keep development files out of the published package