cto-reviewlisted
Install: claude install-skill timdevai/proteus
# /cs:cto-review — CTO Forcing Questions
**Command:** `/cs:cto-review <plan>`
Pressure-tests architecture and engineering scaling decisions. Six questions to surface the next scaling cliff before you hit it.
## When to Run
- Before approving a major architecture change
- Before doubling the engineering team
- Before a build-vs-buy decision > $100K/year
- When a system is showing reliability stress (SLOs missed)
- Before committing to a new platform / language / DB
## The Six CTO Questions
### 1. Scaling Cliff
**Where does the current architecture break, in terms of users / requests / data volume?**
- Be specific. "It breaks at 10× current load because the primary DB writes saturate."
- If you don't know, run a load test before deciding.
### 2. Tech Debt Inventory
**What's the top tech debt item, what's it costing per week, and when does it become blocking?**
```bash
python ../../../skills/cto-advisor/scripts/tech_debt_analyzer.py
```
### 3. Team Scaling
**For each open req, what's the ramp time and contribution model?**
```bash
python ../../../skills/cto-advisor/scripts/team_scaling_calculator.py
```
### 4. Build vs Buy
**Why are we building this instead of buying it — and what's the 3-year TCO of each?**
- If "we want control" or "it's not that hard" — push back.
- If the answer is "this is our core moat," build.
### 5. SLO / Reliability
**What are the SLOs for this system and what's the current error budget burn?**
- Without an SLO, you can't reason about reliabil