Auto Doc Agent
Your code tells a story. But without documentation, nobody can read it. This agent analyzes your codebase and generates YARD comments, API docs, and READMEs that actually stay in sync with your code.
Here's the Thing About Documentation
You know it matters. Everyone knows it matters. But let's be honest about what actually happens:
- "The code is self-documenting" — until someone new joins and spends two weeks figuring out what
process_thingactually does - "We'll document it later" — and later never comes. Trust me, I've seen codebases from 2015 still waiting for "later"
- "The docs are outdated" — which is worse than no docs at all. Now you're actively misleading people
- "Who wrote this method?" — git blame shows someone who left three years ago
The result? Onboarding takes weeks instead of days. Developers guess at method signatures. Critical knowledge lives only in the heads of senior engineers who might leave tomorrow.
How the Agent Works
Five steps. No magic. Just systematic analysis of what your code actually does.
Codebase Structure Scan
First, the agent maps your entire application architecture. Think of it as building a blueprint before writing anything.
- → Identifies models, controllers, services, jobs, and concerns
- → Extracts public interfaces and method signatures
- → Analyzes your existing doc style so new docs match
YARD Comment Generation
Now comes the actual documentation. The agent writes standardized YARD comments for your Ruby classes and methods.
-
→
Documents
@param,@return, and@raisetags - → Infers types from usage patterns and your test suite
- → Pulls real usage examples straight from your specs
API Documentation
If you have an API, the agent generates endpoint documentation by analyzing your controllers.
- → Parses routes and controller actions
- → Documents request/response formats from your specs
- → Identifies required params and auth requirements
README Generation
Complex modules deserve their own documentation. The agent creates focused READMEs that explain the why, not just the what.
- → Explains module purpose and responsibilities
- → Documents config options and environment variables
- → Includes practical examples your team can copy-paste
Pull Request with Documentation
Everything gets delivered as a clean PR. You review it, your team reviews it, then you merge.
- → Adds documentation without touching code behavior
- → Maintains consistency with your existing style
- → You review, you merge, you own the docs.
Safety Guarantees
I know what you're thinking: "What if it messes up my code?" It won't. Here's why.
Comments Only
The agent only adds documentation. It never touches your actual code logic.
Public Interfaces Only
Documents public methods. Private implementation details stay private.
Style Consistency
Matches your existing doc format. No jarring style changes.
Test Validation
Runs your test suite to make sure nothing breaks. Documentation shouldn't cause failures.
YARD Compliance
All docs follow YARD standards. Validates with yard doc.
Full Audit Trail
Every decision is logged and explained in the PR. You see exactly why each doc was written.
Let Me Be Clear About What This Isn't
- ✗ Not boilerplate. Every doc is contextual and meaningful. No "This method does a thing" nonsense.
- ✗ Not "document everything." Focuses on public interfaces that actually matter to your team.
- ✗ Not a one-time dump. Run it continuously to keep docs in sync as your code evolves.
- ✗ Not replacing your developers. They review and improve the generated docs. The agent does the grunt work.
What You Can Expect
Real numbers from real codebases. Your results may vary, but this is typical.
Ready to Document Your Codebase?
Start with a $1,500 audit. You'll get a documentation coverage report and a prioritized plan for what needs documenting first.