OpenSpec 1.13.0 adds an `explore` command in front of `propose`.

OpenSpec is a spec layer working across Claude Code, Cursor, Codex, Copilot and others via five slash commands: /opsx:explore, /opsx:propose, /opsx:apply, /opsx:verify, /opsx:archive. Propose emits proposal.md, a specs/ directory, design.md and tasks.md; apply executes; verify checks implementation against spec; archive moves the change to history. The design choice to copy is explore as a distinct no-stakes phase that reads existing code and shapes a plan before any artifact gets committed, aimed at brownfield work where the agent's first failure is assuming behavior it never read. Hit the HN front page at 154 points on September 16.