Docs that
write
themselves.

Install GitHub App ↗See how it works
⬆ZAR by Zar Labs · Free for OSS
★Free for open source repos
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Trusted by 200+ developers★★★★★
zar · terminal

Trusted by developers at

GitHub
Vercel
Railway
Supabase
Linear
Anthropic
Stripe
Figma
GitHub
Vercel
Railway
Supabase
Linear
Anthropic
Stripe
Figma

HOW IT WORKS

From push to PR
in seconds.

No config. No migration.
Just install and push.

01Developer

Push your code

$ git add -A
$ git commit -m "feat: add payment"
$ git push origin main
↗ pushing 3 files...

Nothing changes in your workflow.
Write code exactly as you always have.

Zero workflow changes
02AI Analysis

ZAR analyzes

● scanning commit abc1234...
reading AST structure
→ new endpoint detected
→ README.md outdated
→ 3 sections missing
confidence: 0.94
✓ generating patches...

AST parser reads code structure, not just text.
Claude AI understands what changed and why.

AST + Claude AI
03Result

PR appears

✓ Pull Request #47 opened
docs: auto-update after
feat: add payment API
Files updated:
✚ README.md +31 lines
✚ docs/api.md +67 lines
→ github.com/.../pull/47

Review the PR like any other.
Merge it. Documentation stays fresh.

Auto-generated PR

< 30sec

avg PR time

0%

accuracy

Zero

config needed

// FEATURES

Everything ZAR does.

From AST analysis to CI gates — one agent, zero manual work.

AST-powered analysis

Reads code structure, not just text.
Understands functions, classes, and signatures.

payments.py
class PaymentView:
def get(self, req):
...
def create(self, req):
+ amount = req.data['amount']
+ return stripe.charge()
Class: PaymentView
├── method: get()
├── method: create() NEW
│ ├── param: amount
│ ├── return: stripe.charge
└── method: delete()
Supports Python · JS · TS · Go

Smart filtering

Only meaningful changes trigger updates.

fix typo in READMEskipped
format codeskipped
feat: add payment endpointprocessed

Style guide

Writes in your team's voice.

Write like Stripe docs…
Preview
CI gate
Blocks merges when docs drift.
Pull request #1042#1042
⛔ Blocked
Docs outdated vs. main
Cross-repo sync
Code here, docs there.
my-org/backend
my-org/docs
Auto-synced on every push
MCP server
Works natively inside Cursor and Claude Desktop. Ask questions about your codebase in plain English.
CursorClaude Desktop
Composer◇
@zar update auth module docs
PRICING
Simple pricing for everyone.
Start free. Upgrade when ready.
Save 20%
Free
For open source projects
$0/month
Get started free
Plan limits
  • Public repositories only
  • Unlimited commits
  • Basic dashboard
Features
  • Auto doc updates
  • PR creation
  • Community support
Most Popular
Pro
For individual developers
$19/month
Start 14-day trial
Plan limits
  • Public + private repos
  • Unlimited commits
  • Advanced dashboard
Features
  • Style guide customization
  • Priority support
  • Advanced analytics
  • Dependency tracking
Team
For teams up to 10 developers
$49/month
Start 14-day trial
Plan limits
  • Up to 10 developers
  • Unlimited commits
  • Team dashboard
Features
  • Everything in Pro
  • CI Gate
  • Cross-repo sync
  • MCP Server
  • Team analytics
  • Slack notifications
Enterprise
For large engineering teams
Custompricing
Contact us for volume pricing
Book a demo →
Plan limits
  • Unlimited developers
  • Unlimited repositories
  • SLA guarantee
Features
  • Everything in Team
  • SSO / SAML
  • Custom integrations
  • Dedicated support
  • On-premise option
  • Custom contracts
  • Security audit
🔒 SOC2 compliant · GDPR ready
14-day free trial on all paid plans·No credit card required·Cancel anytime
What developers say
Teams ship faster with ZAR.
“ZAR caught a documentation gap we didn't even know existed. Now our API docs stay in sync automatically.”
Alex Chen
Founder @ LinearSync
“The CI gate feature is genius. No more merging code with stale docs. ZAR blocks it before it becomes a problem.”
Sam Park
CTO @ BuildStack
“Cross-repo sync saves us hours every week. Our docs repo stays perfectly aligned with the main codebase.”
Nina Patel
Staff Engineer @ Supabase
“We stopped having 'docs are outdated' conversations entirely. It's just handled now.”
Maria Santos
Engineering Lead @ Vercel
“Installed it in 2 minutes. First PR came in 10 minutes later with perfect webhook documentation.”
Jesse Taylor
Senior Dev @ Stripe
“The AST analysis means it actually understands what changed, not just regex matching. That difference matters.”
David Kim
Founder @ DevTools Co
Stop writing docs manually
Install ZAR.
It's free to start.
Install GitHub App →
Free for public repos · 2 minute setup