Creates structured change proposals with specification deltas for new features, breaking changes, or architecture updates. Use when planning features, creating proposals, speccing changes, introducing new capabilities, or starting development workflows. Triggers include "openspec proposal", "create proposal", "plan change", "spec feature", "new capability", "add feature planning", "design spec".
Install
npx skills add forztf/open-skilled-sdd --skill openspec-proposal-creationnpx skills add forztf/open-skilled-sdd --skill openspec-proposal-creation -a claude-code -gnpx skills add forztf/open-skilled-sdd --skill openspec-proposal-creation -a codex -ggemini skills install https://github.com/forztf/open-skilled-sdd.git --path skills/openspec-proposal-creationgh skill install forztf/open-skilled-sdd openspec-proposal-creationgit clone --depth 1 https://github.com/forztf/open-skilled-sdd /tmp/forztf__open-skilled-sdd
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/forztf__open-skilled-sdd/skills/openspec-proposal-creation ~/.claude/skills/openspec-proposal-creation # Claude Code
cp -R /tmp/forztf__open-skilled-sdd/skills/openspec-proposal-creation ~/.agents/skills/openspec-proposal-creation # Codex, Cursor, Gemini CLI, Copilot, OpenCode