feat: Expand fleet to 23 skills across all domains

New skills (14):
- nestjs-best-practices: 40 priority-ranked rules (kadajett)
- fastapi: Pydantic v2, async SQLAlchemy, JWT auth (jezweb)
- architecture-patterns: Clean Architecture, Hexagonal, DDD (wshobson)
- python-performance-optimization: Profiling and optimization (wshobson)
- ai-sdk: Vercel AI SDK streaming and agent patterns (vercel)
- create-agent: Modular agent architecture with OpenRouter (openrouterteam)
- proactive-agent: WAL Protocol, compaction recovery, self-improvement (halthelobster)
- brand-guidelines: Brand identity enforcement (anthropics)
- ui-animation: Motion design with accessibility (mblode)
- marketing-ideas: 139 ideas across 14 categories (coreyhaines31)
- pricing-strategy: SaaS pricing and tier design (coreyhaines31)
- programmatic-seo: SEO at scale with playbooks (coreyhaines31)
- competitor-alternatives: Comparison page architecture (coreyhaines31)
- referral-program: Referral and affiliate programs (coreyhaines31)

README reorganized by domain: Code Quality, Frontend, Backend,
Auth, AI/Agent Building, Marketing, Design, Meta.

Mosaic Stack is not limited to coding — the Orchestrator serves
coding, business, design, marketing, writing, logistics, and analysis.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/ai-sdk/references/devtools.md

@@ -0,0 +1,52 @@
+---
+title: AI SDK DevTools
+description: Debug AI SDK calls by inspecting captured runs and steps.
+---
+
+# AI SDK DevTools
+
+## Why Use DevTools
+
+DevTools captures all AI SDK calls (`generateText`, `streamText`, `ToolLoopAgent`) to a local JSON file. This lets you inspect LLM requests, responses, tool calls, and multi-step interactions without manually logging.
+
+## Setup
+
+Requires AI SDK 6. Install `@ai-sdk/devtools` using your project's package manager.
+
+Wrap your model with the middleware:
+
+```ts
+import { wrapLanguageModel, gateway } from 'ai';
+import { devToolsMiddleware } from '@ai-sdk/devtools';
+
+const model = wrapLanguageModel({
+  model: gateway('anthropic/claude-sonnet-4.5'),
+  middleware: devToolsMiddleware(),
+});
+```
+
+## Viewing Captured Data
+
+All runs and steps are saved to:
+
+```
+.devtools/generations.json
+```
+
+Read this file directly to inspect captured data:
+
+```bash
+cat .devtools/generations.json | jq
+```
+
+Or launch the web UI:
+
+```bash
+npx @ai-sdk/devtools
+# Open http://localhost:4983
+```
+
+## Data Structure
+
+- **Run**: A complete multi-step interaction grouped by initial prompt
+- **Step**: A single LLM call within a run (includes input, output, tool calls, token usage)