Before
AI-powered code review tool that gives instant feedback like a senior engineer, built for junior developers
After
BAI-powered code review tool that gives instant feedback like a senior engineer, built for junior developers for a narrow first customer segment, packaged as a four-week V1 with a measurable pain and a clear first channel.
Per-question score table
Who is this for, very specifically?
Sharp persona with role, tenure, stack, and the exact trigger pain identified.
What pain are they paying for today?
You name spend and delay, but conflate learners with employed juniors—different buyers, different pains.
Why now? What changed in the world?
Three real shifts named, but each is asserted without sharp, specific proof points.
What's the V1 you can build in 4 weeks?
Scoped and shippable, but the "bad patterns" definition is dangerously vague for V1.
How will you reach the first 100 users?
Channels are plausible but generic; no evidence any of them actually convert.
What does success look like at month 6?
Numbers are specific but logic chain and channel assumptions remain unvalidated.
Homework
Three concrete next steps before you run the next session.
- 1Interview 5 people in the exact customer segment and write down the painful workflow in their words.
- 2Build a four-week V1 outline that solves only the highest-friction step.
- 3Send one concise outreach message to 20 likely first users and measure replies.
What founders say about gstack
“gstack's forcing questions are sharper than most advisors I have paid for.”
@founder_a
“Used this to pressure-test our YC application. We got in.”
@yc_alum_b
“58K GitHub stars for a reason. The framework is legit.”
@indie_dev_c
“It saved me from building the wrong thing. Twice.”
@pm_dana
Your next step
Apply to YC
- 1.5% acceptance rate
- 3 to 6 months until the next batch
- One idea reviewed
- Weeks to hear back
Go Pro
- Start today, no waiting
- 10 idea evals every month
- Full results in 5 minutes
- Private sessions and history
$19 / month
Applying to YC is still worth it. Use Pro to sharpen the idea before you do.
Go Pro
$19/month for 10 Full Sessions, private results, session history, and homework follow-up emails.
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5-axis market analysis in Garry's voice
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6-angle idea expansion