OpenSpec/openspec/changes/add-update-command/proposal.md

Add Update Command

Why

Users need a way to update their local OpenSpec instructions (README.md and CLAUDE.md) when the OpenSpec package releases new versions with improved AI agent instructions or structural conventions.

What Changes

• Add new openspec update CLI command that updates OpenSpec instructions
• Replace openspec/README.md with latest template
• Replace CLAUDE.md with latest template (complete replacement)
• Display success message after update

Impact

• Affected specs: cli-update (new capability)
• Affected code:
  • src/cli/update.ts (new file)
  • src/cli/index.ts (register new command)