openspec-bulk-archive-change

Archive multiple completed changes in a single operation. This skill allows you to batch-archive changes, handling spec conflicts intelligently by checking the codebase to determine what's actually implemented. **Input**: None required (prompts for selection) **Steps** 1. **Get active changes** Run `openspec list --json` to get all active changes. If no active changes exist, inform user and stop. 2. **Prompt for change selection** Use **AskUserQuestion tool** with multi-select to let user choose changes: - Show each change with its schema - Include an option for "All changes" - Allow any number of selections (1+ works, 2+ is the typical use case) **IMPORTANT**: Do NOT auto-select. Always let the user choose. 3. **Batch validation - gather status for all selected changes** For each selected change, collect: a. **Artifact status** - Run `openspec status --change "<name>" --json` - Parse `schemaName` and `artifacts` list - Note which artifacts are `done` vs other states b. **Task completion** - Read `openspec/changes/<name>/tasks.md` - Count `- [ ]` (incomplete) vs `- [x]` (complete) - If no tasks file exists, note as "No tasks" c. **Delta specs** - Check `openspec/changes/<name>/specs/` directory - List which capability specs exist - For each, extract requirement names (lines matching `### Requirement: <name>`) 4. **Detect spec conflicts** Build a map of `capability -> [changes that touch it...