openspec-new-changelisted

Start a new change using the experimental artifact-driven approach. **Input**: The user's request should include a change name (kebab-case) OR a description of what they want to build. **Steps** 1. **If no clear input provided, ask what they want to build** Use the **AskUserQuestion tool** (open-ended, no preset options) to ask: > "What change do you want to work on? Describe what you want to build or fix." From their description, derive a kebab-case name (e.g., "add user authentication" → `add-user-auth`). **IMPORTANT**: Do NOT proceed without understanding what the user wants to build. 2. **Determine the workflow schema** Use the default schema (omit `--schema`) unless the user explicitly requests a different workflow. **Use a different schema only if the user mentions:** - A specific schema name → use `--schema <name>` - "show workflows" or "what workflows" → run `openspec schemas --json` and let them choose **Otherwise**: Omit `--schema` to use the default. 3. **Create the change directory** ```bash openspec new change "<name>" ``` Add `--schema <name>` only if the user requested a specific workflow. This creates a scaffolded change at `openspec/changes/<name>/` with the selected schema. 4. **Show the artifact status** ```bash openspec status --change "<name>" ``` This shows which artifacts need to be created and which are ready (dependencies satisfied). 5. **Get instructions for the first artifact** Th