Common signs: outdated or missing specs, and nobody sure how features should behave. Usual causes: fast building and team changes. What we do: read the code and app and write functional specs and flows. What you get: up-to-date documentation of what the app does.
Our specs from code service writes the documentation your app is missing: functional specifications, user flows, roles and business rules, based on what the code and app actually do today. A Codersarts engineer reads the code, uses the app and turns it into clear documents your team, testers and clients can rely on. Fixed price from $199 with 1-day delivery.
Specs From Code at a Glance
Item | Details |
|---|---|
Starting price | $199 for one feature area |
Delivery | 1 day; 3 days for a full app |
Documents | Functional spec, user flows, roles and permissions, business rules |
Formats | Markdown, Google Docs, Notion or Confluence |
Also flags | Inconsistencies and likely bugs found while documenting |
What you get | Docs that match the real app |
Revisions | One revision round included |
What Is a Functional Specification?
A functional specification describes what software does from a user's point of view: the features, user roles, flows, inputs, outputs and business rules. Written from existing code, it captures how the app really behaves today, which is often different from what old documents say.
Signs You Need Specs
Your documentation is outdated or doesn't exist
Testers don't know what correct behavior looks like
A new developer or vendor is taking over
Clients ask how a feature works and nobody is sure
Different screens show different numbers
Why Docs Fall Behind
Fast building
Features shipped without docs.
Team changes
Knowledge left with developers.
AI-generated code
Behavior nobody wrote down.
Docs not updated
Specs written once and never touched again.
Quick Checks You Can Try First
List every feature and user role.
Write down one rule you're unsure about, such as how points are counted.
Ask a developer to confirm it from the code.
Pick one place to keep docs.
If the problem remains, our engineers take it from there.
How We Write Your Specs
Explore. We use the app as each role.
Read the code. We confirm rules and edge cases in code.
Map flows. We document each user journey.
Write rules. We record calculations, limits and permissions.
Flag issues. We note inconsistencies and likely bugs.
Review. We walk through the docs with you.
What You Get
A functional specification
User flow descriptions
Roles and permissions matrix
Business rules and calculations
A list of inconsistencies found
Example result (illustrative)
A coding platform's spec was out of date, so testers couldn't tell correct behavior from bugs. We documented every flow, the XP and streak rules, and admin token limits from the code. The process found that streak counts used two different formulas, which explained the mismatched numbers.
What Is Included and Not Included
Included | Not included |
|---|---|
One feature area in the standard package | Writing new feature specs |
Functional spec, flows, roles and rules | Technical architecture docs (separate task) |
Inconsistency list | Fixing bugs found |
One revision round | Ongoing documentation |
Pricing for Specs From Code
Package | Best for | Starting at | Delivery |
|---|---|---|---|
Feature area | One area, such as scoring or billing | $199 | 1 day |
Full app | All features and roles | $599 | 3 days |
Large system | Many modules or services | Custom quote | Agreed with you |
You get a fixed quote after we review your setup. You approve the scope before any payment.
Who This Is For
Founders with outdated specs
Teams preparing for QA or a handover
Companies onboarding a new vendor
Apps built quickly or with AI tools
What We Need From You
Repository access
Test accounts for each role
Any existing docs
Questions you want answered
Code and data privacy
We sign an NDA on request, work with the least access needed, and never keep copies of your data after delivery. You own all code, configuration and notes.
Key Terms Explained
Functional spec: a description of what the software does for users
User flow: the steps a user takes to complete a task
Business rule: a rule the system applies, such as how points are calculated
Permissions matrix: a table of what each role can do
Common Mistakes We Avoid
Documenting what the app should do instead of what it does
Skipping edge cases
Docs nobody can find
Never updating docs after changes
Need More Than One Task?
Need technical documentation too? See Codebase Documentation. Or use Prepaid Developer Hours to cover several tasks from one prepaid balance.
Related Tasks
Functional QA Test Pass to test against the spec
Codebase Documentation for developer docs
Refactor a Module where docs reveal messy logic
Frequently Asked Questions
Why write specs from code instead of from memory?
Code shows what the app really does, including edge cases people forget.
Will you find bugs while documenting?
Often. We list inconsistencies and likely bugs separately.
Which format do you deliver?
Markdown, Google Docs, Notion or Confluence.
Can testers use the spec?
Yes. It's written so QA can turn it into test cases.
Know Exactly What Your App Does
Share your app and repository, and a Codersarts engineer will write documentation that matches reality.