feat(fiction-assistance): register plugin with full bespoke command set

Snapshot of the fiction-assistance plugin in its original Universalis-
specific form before generalization. Adds the missing plugin.json
manifest (subdirectory command paths explicitly listed), moves the two
stray root-level review files into their proper homes (review-all.md
into the reviewing-fiction skill, review-final.md as a command with
frontmatter), and registers the plugin in the marketplace.

Preserved here so the original card-generation and vault-maintenance
commands remain recoverable when the plugin is reduced to a portable
guidance-and-analysis subset in the next commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fiction-assistance/commands/generate/validate-story.md

@@ -0,0 +1,154 @@
+---
+description: Validate story consistency and find issues
+allowed-tools: Write(40 - Generated/Analysis/validation-report.md)
+---
+You are performing comprehensive validation of the Universalis story world for consistency and completeness.
+
+## Objectives:
+
+1. **Find missing cross-references** between generated cards
+2. **Identify orphaned files** with no incoming links
+3. **Detect formatting inconsistencies** across cards
+4. **Flag mentioned but undocumented entities**
+5. **Validate frontmatter completeness**
+
+## Validation Checks:
+
+### 1. Cross-Reference Validation
+- **Broken Links**: Find `[[filename.md]]` links pointing to non-existent files
+- **Missing Backlinks**: Characters mentioned in events but not linked back
+- **Orphaned Entities**: Cards with no incoming references from other cards
+- **One-Way Links**: A links to B, but B doesn't mention A when it should
+
+### 2. Frontmatter Consistency
+Check each card type for:
+- **Required fields present**: name, type, tags, created, modified
+- **Valid values**: status fields use allowed values
+- **Consistent formatting**: dates in correct format
+- **Complete relationships**: appearances list matches actual chapter mentions
+
+### 3. Content Validation
+- **Empty sections**: Required sections with no content
+- **Inconsistent naming**: Same entity referenced with different names
+- **Missing first-mention links**: Entities mentioned but not linked
+- **Duplicate content**: Similar descriptions across multiple cards
+
+### 4. Entity Coverage
+Scan chapters for:
+- **Undocumented characters**: Names mentioned but no character card exists
+- **Undocumented locations**: Places mentioned but no location card
+- **Undocumented technology**: Tech mentioned but no tech card
+- **Undocumented species**: Races mentioned but no species card
+
+### 5. Structural Issues
+- **File naming**: Inconsistent filename conventions
+- **Directory structure**: Files in wrong categories
+- **Markdown formatting**: Headers, lists, frontmatter syntax
+- **Link syntax**: Malformed wiki-style links
+
+## Report Generation:
+
+Create comprehensive report at `40 - Generated/Analysis/validation-report.md`:
+
+```markdown
+# Story Validation Report
+
+*Generated: {{current_date}}*
+
+## Summary
+- **Total Issues Found**: {{total_issue_count}}
+- **Critical Issues**: {{critical_count}} (broken links, missing entities)
+- **Warning Issues**: {{warning_count}} (formatting, minor inconsistencies)
+- **Info Issues**: {{info_count}} (suggestions, optimizations)
+
+## Critical Issues
+
+### Broken Links
+{{list_broken_links_with_sources}}
+
+### Missing Entity Cards
+Characters mentioned in chapters but no card exists:
+{{list_missing_characters}}
+
+Locations mentioned but no card exists:
+{{list_missing_locations}}
+
+[Continue for other entity types]
+
+### Orphaned Files
+Cards with no incoming references:
+{{list_orphaned_files}}
+
+## Warning Issues
+
+### Frontmatter Issues
+{{list_frontmatter_problems}}
+
+### Formatting Inconsistencies
+{{list_formatting_issues}}
+
+### Missing Cross-References
+{{list_missing_links}}
+
+## Info Issues
+
+### Content Suggestions
+{{list_content_suggestions}}
+
+### Optimization Opportunities
+{{list_optimizations}}
+
+## Validation Details
+
+### Files Checked
+- **Total Generated Files**: {{total_file_count}}
+- **Character Cards**: {{character_file_count}}
+- **Location Cards**: {{location_file_count}}
+- **Ship Cards**: {{ship_file_count}}
+- **Technology Cards**: {{tech_file_count}}
+- **Species Cards**: {{species_file_count}}
+- **Plotline Cards**: {{plotline_file_count}}
+- **Event Cards**: {{event_file_count}}
+- **Conflict Cards**: {{conflict_file_count}}
+- **Theme Cards**: {{theme_file_count}}
+
+### Chapter Coverage
+{{list_chapters_with_coverage_stats}}
+
+## Recommendations
+
+### Immediate Actions
+{{list_critical_fixes}}
+
+### Quality Improvements
+{{list_quality_suggestions}}
+
+### Future Enhancements
+{{list_enhancement_ideas}}
+
+---
+Generated by Claude Code validation system for Universalis writing project.
+```
+
+## Validation Methodology:
+
+1. **Inventory all files** in 40 - Generated/
+2. **Extract all links** from each file (frontmatter + content)
+3. **Cross-reference entities** mentioned across files
+4. **Scan chapters** for entity mentions
+5. **Compare coverage** between manuscript chapters and generated cards
+6. **Check formatting** against established patterns
+7. **Generate prioritized issue list**
+
+## Issue Severity:
+- **Critical**: Broken functionality (broken links, missing required entities)
+- **Warning**: Inconsistencies that affect quality (formatting, incomplete data)
+- **Info**: Suggestions for improvement (optimization opportunities)
+
+## Output Requirements:
+- Fixed filename: `40 - Generated/Analysis/validation-report.md`
+- Structured sections for different issue types
+- Actionable recommendations with specific file references
+- Summary statistics for tracking improvement over time
+
+**IMPORTANT**: Provide specific file references and line numbers where possible to make issues easy to fix.