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  1. Users
  2. Wren Tanaka
W

Wren Tanaka

wren.tanaka@northline.aiFrontend Engineer · Engineering
Tools used
ChatGPTClaudeCursor
AI spend (3 mo)$6,039.26
Savings$2,057.50

Wren's Token Efficiency Over Time

Score out of 100 · trending down

Wren's Monthly AI Spend

Spend down 25% while output volume rose

What improved Wren's usage

  • Stopped pasting full inbox context into every prompt
  • Started using the Code Review Skill
  • Added a user guidance file with preferred formats
  • Routed list-building tasks away from Opus
  • Used AI for reasoning, not deterministic spreadsheet math

Wren's top workflow

Analyze Data

Exploring metrics, usage patterns, and experiment results

W
R
F
U
$2,30027 convos

Wren vs Engineering

Efficiency vs. cost compared with teammates
Efficiency vs. Cost
EfficiencyToken Spend

Wren's user.md

user.mdVery Efficient
14 lines · under the ~40-line always-on budget
# user.md

You're an experienced Frontend Engineer working on the customer-facing web app and shared UI package. You ship in TypeScript/React, care about accessibility and performance, and partner closely with Product and Design.

## Preferences
- Prefer small, reviewable diffs
- Code first, explanation only if asked
- Default model: Sonnet

## Project
- Package manager: pnpm
- Test: pnpm test · Lint before commit

## Do not
- Paste the full repo by default
- Rewrite unrelated files

## Load on demand
- @review.md · @debug.md · @tests.md