Add teach-impeccable and review commands, dynamic placeholders

New commands:
- /teach-impeccable: One-time setup that gathers UX-focused design
  context (explores codebase first, then asks targeted questions)
- /review: UX design review evaluating hierarchy, clarity, emotional
  resonance (complements technical /audit)

Build system improvements:
- Dynamic {{model}}, {{ask_instruction}}, {{config_file}} placeholders
  per provider (Claude/Gemini/GPT/the model)
- context: fork support for Claude Code sub-agents (audit, extract)
- Skill reference auto-added to design commands

Skill refinements:
- Merged Design Thinking and Context Awareness sections
- Removed redundant patterns and technical questions
- More direct feedback guidance (radical candor)

Website updates:
- 17 commands (was 16)
- Review demo showing UX issues (HIERARCHY, NO PRIMARY, DEAD END)
- teach-impeccable in System group of periodic table

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/lib/transformers/gemini.js

@@ -1,5 +1,5 @@
 import path from 'path';
-import { cleanDir, ensureDir, writeFile } from '../utils.js';
+import { cleanDir, ensureDir, writeFile, replacePlaceholders } from '../utils.js';
 
 /**
  * Gemini Transformer (Full Featured - TOML + Modular Skills)
@@ -17,8 +17,9 @@ export function transformGemini(commands, skills, distDir, patterns = null) {
 
   // Commands: Transform to TOML
   for (const command of commands) {
-    // Replace named placeholders with {{args}}
-    let prompt = command.body.replace(/\{\{[^}]+\}\}/g, '{{args}}');
+    // First replace our placeholders, then replace remaining {{arg}} with {{args}}
+    let prompt = replacePlaceholders(command.body, 'gemini');
+    prompt = prompt.replace(/\{\{[^}]+\}\}/g, '{{args}}');
 
     const toml = [
       `description = "${command.description.replace(/"/g, '\\"')}"`,
@@ -50,11 +51,15 @@ export function transformGemini(commands, skills, distDir, patterns = null) {
     if (skill.references && skill.references.length > 0) {
       const refSections = skill.references.map(ref => {
         refCount++;
-        return `\n\n---\n\n## Reference: ${ref.name}\n\n${ref.content}`;
+        const refContent = replacePlaceholders(ref.content, 'gemini');
+        return `\n\n---\n\n## Reference: ${ref.name}\n\n${refContent}`;
       });
       content += refSections.join('');
     }
 
+    // Replace all placeholders
+    content = replacePlaceholders(content, 'gemini');
+
     const outputPath = path.join(geminiDir, `GEMINI.${skill.name}.md`);
     writeFile(outputPath, content);
   }