Workspace-native AI brain. Claude Code wired into Google Workspace via 31 MCP servers, 19 reusable skills, 125 memory files, 7 cron jobs, and a Telegram bot for mobile. ~150 EUR/month all-in. ~23 hours per week saved on a tracked sample. Replaces ~1.5 FTE that would have cost 80-110k EUR/year.
This is the public, fork-friendly slice of my actual production setup. Built over multiple business contexts (advisory, real estate, ventures, content, ops). The premise: instead of hiring the team I'd have hired after my last exit, I bet that AI as infrastructure could replace it. Four years in, that bet is still the strategy.
🇩🇪 Auf Deutsch hier: Schritt-für-Schritt von null bis laufendes Brain: SETUP_DE.md. Die Slides zum Talk "Tool Overload & Setup Trap" (#BCD, Juni 2026): chris1928a.github.io/erler-ventures/talks/2026-06-12-bcd
| Folder / File | What it is |
|---|---|
SETUP_DE.md |
🇩🇪 Die deutsche Anleitung zum Copy-Pasten: Folder-Struktur + Terminal-Schritte, von null bis laufendes Brain. Begleitet den Talk "Tool Overload & Setup Trap". |
SETUP.md |
The full architecture spec. 4-Layer Brain, the 31 MCP servers, the 7 cron jobs, the Anti-AI voice rules, the cost story, the 30-day rollout plan, the troubleshooting guide. ~430 lines. Start here. |
slides.html |
The 44-slide deep dive. Body-mapped tour of every layer, every tool. Open in any browser, arrow keys to navigate, print as PDF if you want. |
| BCD talk slides | 🇩🇪 "Tool Overload & Setup Trap", the 20-slide German talk: Second Brain to Company Brain, real costs, governance, autonomy tiers. |
skills/ |
8 forkable Claude Code Skills. Each one is a complete SKILL.md (~280-380 lines) plus prompts/, examples/, and scripts/ subfolders. Drop in ~/.claude/skills/ and go. |
templates/ |
Foundation files for any Claude Code project: CLAUDE.md.template, memory file templates (user, voice, channels, hats, curator rules). Fork these first, takes 15 minutes. |
glossary.md |
Plain-English definitions for Claude Code, MCP, Skills, Hooks, Memory, ZDR, EU AI Act, and 30+ other terms. For anyone newer to the stack. |
- You operate across multiple domains (advisory, real estate, ventures, content, ops) and want one brain that understands all of them
- You live inside Google Workspace and want AI everywhere, including mobile
- You can pay ~150 EUR/month for the convenience
- You'd rather invest 30-60 hours up-front to own the setup forever than buy a vertical SaaS
If you want a complete opinionated Life OS out of the box, look at Daniel Miessler's PAI instead.
PRIVATE BRAIN ARCHITECTURE (4 layers)
Layer 4 — Body Telegram bot · 31 MCP servers · 7 crons
Layer 3 — Working Memory Claude Code on AWS Lightsail Frankfurt
Layer 2 — Short-term Memory 125 .md files routed by ~50-line CLAUDE.md
Layer 1 — Long-term Memory GitHub + Notion + Drive
The numbers, tracked over 8 weeks:
| Component | Count |
|---|---|
| MCP servers | 31 |
| Skills (universal + domain) | 19 |
| Memory files | 125 |
| Cron jobs | 7 |
| Hours saved per week | ~23 |
| Total monthly cost | ~150 EUR all-in |
| Replaces | ~1.5 FTE (80-110k EUR/yr at DACH rates) |
| Cost ratio | ~45-60x cheaper |
Full breakdown in SETUP.md.
Five universal (fork as-is, edit personal data) + three domain examples (show the pattern, adapt to your vertical).
| Skill | What it does | Tracked time saved |
|---|---|---|
/morning-brief |
Daily 7am brief: inbox top 3, calendar, open threads | 2.25h/week |
/diarize-person |
1-page stakeholder dossier with full history | (5.7h/wk meeting prep) |
/draft-by-channel |
Voice-locked drafts per recipient + channel | 2.7h/week |
/weekly-review |
Friday 7-day review across all "hats" | 1.3h/week (90→10 min) |
/memory-curator |
Weekly memory hygiene cron | maintenance |
| Skill | For who | Pattern to copy |
|---|---|---|
/audit-process |
Advisors / COOs / ops consultants | Diagnostic + Impact-Effort matrix + top-3 |
/sales-script-rewriter |
Sales founders / SDR managers | Transcript-in + 6-dim score + rewritten section |
/property-pricing |
Real estate / daily-priced goods | API-in + decision-out + daily cron |
# 1. Install Claude Code
curl -fsSL https://claude.ai/install.sh | bash
# 2. Clone this repo
git clone https://github.com/chris1928a/chris-ai-stack.git
cd chris-ai-stack
# 3. Fork the templates into your Claude config
mkdir -p ~/.claude/projects/my-brain/memory
cp -r templates/memory-templates/* ~/.claude/projects/my-brain/memory/
cp templates/CLAUDE.md.template ~/.claude/projects/my-brain/CLAUDE.md
# 4. Fork the morning-brief skill
cp -r skills/morning-brief ~/.claude/skills/
# 5. Open a Claude Code session
cd ~/.claude/projects/my-brain && claudeThen in Claude Code: edit memory/user_about.md (5 min, the highest-impact file you'll write) and type /morning-brief to test.
For the full path with MCP servers, cron jobs, and Telegram, see SETUP.md.
Every output that sounds like AI degrades trust. The voice rules baked into all skills:
Banned: delve, leverage, unlock, harness, synergy, robust, seamless, em-dashes, "I hope this finds you well", mega-paragraphs, "happy to help", "great question".
Required: direct + terse, German Umlauten always, Sie-Form for PE / corporate counsel, Du-Form for founders / peers, one concrete number per outreach, first-name sign-off in DMs, full sign-off block only in formal external emails.
Full template at templates/memory-templates/feedback_voice.md. Fork it, fill in your own examples.
This stack came out of three years of building, ripping, and rebuilding personal AI infrastructure. v1-v3 are dead (ChatGPT-only, Notion+Zapier, multi-tool-no-architecture). Only v4 (Workspace-native) and v5 (local-first variant) survived.
Most of the public material — the 44-slide deep dive, the 8 skill specs, the 30-day rollout plan, the cost honest breakdown — was originally prepared for a private operator session in May 2026. This repo extracts the parts that are useful regardless of context, with all event-specific framing and other operators' setups removed.
If you want the broader version with two other operator paths (Dom's local-first + Fabian's PAI Life OS), audience pain analysis, and 11 documented solutions to common pain clusters, the full source is at github.com/chris1928a/eo-ai-exchange.
Christoph Erler · Founder, Erler Ventures [email protected] · linkedin.com/in/christopherler
Open issues for questions, suggestions, or "this broke for me" reports: github.com/chris1928a/chris-ai-stack/issues
MIT. Fork it, modify it, share it. Attribution appreciated, not required.
Last updated: 2026-05-14.