# Systems Review

> Review implementation for second-order effects

- Skill: `sunnypatneedi/systems-review` (Agent Skill)
- Install (CLI): `npx skillmds@latest add sunnypatneedi/systems-review`
- Raw SKILL.md: https://api.skillmd.com/api/skills/sunnypatneedi/systems-review/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: sunnypatneedi (https://skillmd.com/u/sunnypatneedi)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/sunnypatneedi/systems-review

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# Systems Review

After implementing, let's review for second-order effects:

## Implementation Summary

1. **What was built?** Brief description.
2. **What changed?** Files modified.
3. **What's the interface?** Input/output contracts.

## Performance Review

Analyze performance implications:

- What's the time complexity?
- What happens at 10x scale?
- Where are potential bottlenecks?
- Are there N+1 query risks?
- Is caching appropriate?

## Security Review

Check for security issues:

- Is input validated?
- Is authorization checked?
- Could this be exploited?
- Is sensitive data protected?
- Are there injection risks?

## Downstream Effects

Consider blast radius:

- What breaks if this fails?
- What systems depend on this?
- Are there race conditions?
- Could this cause cascading failures?

## Test Coverage

Verify testing:

- Is the happy path tested?
- Are error paths tested?
- Are edge cases covered?
- Is the interface contract verified?

## Recommendations

Based on review, provide:

1. **Critical** - Must fix before shipping
2. **High** - Should fix soon
3. **Medium** - Consider improving
4. **Low** - Nice to have

## Sign-off Checklist

- [ ] Decomposition was followed
- [ ] Interfaces are verified
- [ ] Error handling is complete
- [ ] Performance is acceptable
- [ ] Security is reviewed
- [ ] Tests are adequate