Appearance
Vibe Agent
🤖
When an LLM can: plan → call tool → observe result → loop.That's an Agent.
Who is this module for?
- Devs wanting to use coding agents (Claude Code, Cursor, Devin) for 10x productivity
- Founders building agent products — automation, sales, customer care
- Operators (HR, marketing, ops) replacing 5-person teams with agents
- Tech/agency in emerging markets building AI Sales Agent / AI Customer Care for clients
No ML background required: just understand LLM API + tool + memory + loop.
Why now?
| Stat | Source |
|---|---|
| 97M downloads/month MCP SDK (970x growth in 18 months) | Anthropic, Mar 2026 |
| 78% enterprise has ≥1 MCP agent in production | Digital Applied 2026 |
| 30 hours autonomous coding uninterrupted, 11,000 lines | Claude Sonnet 4.5, Sep 2025 |
| 72.5% OSWorld-Verified (≈ human baseline ~72%) | Anthropic Computer Use, Feb 2026 |
| $73M ARR Devin in 9 months (Sept 2024 → June 2025) | Cognition AI |
| Goldman Sachs hired Devin alongside 12K engineers | Fortune Jul 2025 |
| +15-20% close rate Yody (Vietnam) using Smax.ai | VN case |
4 opening characters
1️⃣ Pieter Levels — $3.1M/year solo
"Stack: Cursor + Claude + coffee. No employees. No VCs."
- 70+ failed startups before PhotoAI
- Vibe coded fly.pieter.com $0 → $1M ARR / 17 days
- Portfolio ~$3.1M ARR
→ Chapter 1 — Agent Foundation 101
2️⃣ Jaana Dogan — Google Gemini API team
"60 minutes to solve a problem my team iterated on all of 2024."
- Senior engineer Google Gemini
- Used Claude Code to generate distributed orchestration system
- "AI coding tool Google engineers prefer 2025"
→ Chapter 2 — Claude Code Deep Dive
3️⃣ Goldman Sachs — Hired Devin alongside 12K engineers
"Devin = employee #1 in hybrid workforce of 12,000 engineers."
- Cognition's Devin: cloud-based autonomous SWE
- Goldman, Dell, Cisco, Santander, Nubank piloting
- Teams report 3-4x faster on complex tasks
→ Chapter 4 — Multi-Agent Patterns
4️⃣ Yody + Let's Sushi (Vietnam)
"+15-20% close rate. +300% online orders. Smax.ai chatbot."
- VN fashion / restaurant chain
- Smax.ai Facebook Messenger AI agent
- Operating cost down 3x
Module roadmap
| # | Chapter | What you learn |
|---|---|---|
| 1 | Agent Foundation | Cursor + Claude + ship product solo |
| 2 | Claude Code Deep | 30-hour autonomous coding, sub-agent orchestrator-worker |
| 3 | Computer Use | Agent clicks screen like human (72.5% baseline) |
| 4 | Multi-Agent | Patterns: orchestrator-worker, debate, hierarchical |
| 5 | Workflow Agent | n8n + Smax.ai + Lindy + Vapi for ops |
| 6 | MCP Ecosystem | MCP = 2026 standard; opportunity to build MCPs for local stacks |
| 7 | Toolkit 2026 | Full comparison: Coding + General + Workflow + Multi-agent + Infra + Voice |
| 8 | Safety & Evals | CVE-2025-32711, GTG-1002, prompt injection 73% prod deploy |
| 9 | 30-Day Roadmap | Day-by-day plan zero → shipping agent with users |
What is an agent? — 1-page explanation
Definition
Agent = LLM + Tools + Memory + Planning + Sandbox
Standard ReAct loop:
- Thought — LLM thinks what to do next
- Action — Call tool
- Observation — Read tool result
- → back to step 1 (until done)
🤖 ReAct Loop — Agent suy nghĩ thế nào?
Click "Run step" để xem agent loop từng bước.
Thought — agent suy nghĩ kế tiếp
Action — gọi tool
Observation — đọc kết quả tool
Stack overview (May 2026)
6 layers you need
1. Coding agents — Claude Code, Cursor, Windsurf, Devin, Cline, Aider 2. General-purpose agents — Manus, Anthropic Computer Use, OpenAI Workspace 3. Workflow / Automation — n8n, Make, Smax.ai, Lindy, Sema4.ai 4. Multi-agent frameworks — LangGraph, CrewAI, Claude Code SDK, A2A 5. Infrastructure — E2B, Browserbase, Daytona, MCP servers 6. Voice agents — ElevenLabs Conversational, Vapi, Retell, Bland
→ Details: Toolkit 2026
Why emerging market devs/founders have edge
4 advantages
1. Salary < Global → 3-5x margin runway
- Emerging dev: $800-3K/month
- US dev: $8-15K/month
- Same tool cost ($50-500/month) → higher margin
2. Local stack lacks MCP servers
- VN: MISA, KiotViet, Sapo, Haravan, Pancake, Base.vn — no MCP yet
- Brazil, Indonesia, India local stacks similar
- → Blue ocean opportunity to build MCP gateways
3. AI Sales + AI CS for SMEs huge market
- Smax.ai dominates Messenger/Zalo in VN (Yody, Let's Sushi, Biluxury cases)
- 100K+ SMEs in VN alone underserved
- Same pattern repeats in Indonesia, Philippines, Thailand
4. Operator tasks need Computer Use
- Accounting / data entry on legacy software (no API)
- Computer Use = auto data entry replacement
Market numbers
| Stat | Number |
|---|---|
| Agentic AI market 2025 | $7-8B |
| Forecast 2034 | $139-199B (40-50% CAGR) |
| Enterprise apps with agents 2025 | < 5% |
| Forecast end of 2026 | 40% |
| Gartner: AI sales agents vs human sellers 2028 | 10:1 |
| % sellers reporting agent improved productivity | < 40% (gap claim vs reality) |
Reading order
New dev (no coding agent experience)
→ Landing → Chapter 1 Vibe Coding → Chapter 2 Claude Code → Toolkit
Founder building product
→ Chapter 1 Vibe Coding → Chapter 5 Workflow Agent → Chapter 6 MCP → Roadmap
Operator (HR, marketing, ops)
→ Chapter 3 Computer Use → Chapter 5 Workflow Agent → Toolkit
Agency / system integrator
→ Chapter 5 Workflow Agent → Chapter 6 MCP → Safety → Roadmap
Researcher / ML engineer
→ Chapter 4 Multi-Agent → Chapter 6 MCP → Safety
Before you start
"2023: LLMs were chat bots.2024: LLMs could call functions.2025-2026: LLMs can self-drive — plan, execute, recover.Not learning agents now = watching the revolution from the sidelines."
→ Ready? Start here: Chapter 1 — Agent Foundation 101