ComposalCode quality and security
Composal vs Biome
Biome checks source patterns and formatting in supported files. Composal evaluates the deployed application through browser Scenarios and exploration, which complements rather than replaces linting.
Two workflows, side by side
Composal
Composal sends AI browser agents to use your running web app and check the outcomes you care about. Define journeys as plain-English Scenarios, map existing flows with Discovery, or explore for bugs with Deep Scan. Runs keep recordings and reproduction steps so your team or coding agent can investigate a Finding.
Verify documentation →Biome
JavaScript, CSS, and JSON linting and formatting
Biome provides a linter with rule-based static diagnostics and an integrated formatter. Its documentation covers recommended and configurable rules, safe fixes, editor integration, and supported language areas.
What each tool does
“With setup” means you supply code or configuration. “Not confirmed” means support for this workflow needs checking with the vendor.
| Workflow | Composal | Biome |
|---|---|---|
| Run browser journeys | Yes Run saved browser Scenarios and return recordings and reproducible Findings. | No The documented product reviews or analyzes source changes; it does not execute browser journeys. |
| Map application workflows | Yes Discovery maps key application areas and user journeys. | Not confirmed Check whether this product includes this workflow in your intended plan and setup. |
| Explore for unexpected issues | Yes Deep Scan explores the running application and reports reproducible issues. | Not confirmed Check whether this product includes this workflow in your intended plan and setup. |
| Describe checks in plain English | Yes Author Scenarios around the intended user outcome, then review the steps and expected results. | Not confirmed Check whether this product includes this workflow in your intended plan and setup. |
| Run or inspect from a terminal | Yes Use the CLI to start and inspect verification runs and their Findings. | With setup Connect its specialist checks to your development workflow using supported integrations. |
| Source code review and analysis | No Use a dedicated tool for this specialist workflow alongside Composal’s browser verification. | Yes Biome provides a linter with rule-based static diagnostics and an integrated formatter. Its documentation covers recommended and configurable rules, safe fixes, editor integration, and supported language areas. |
Where each fits
Choose Biome when a unified tool for supported language linting and formatting fits your repository. Choose Composal for web acceptance checks, recordings, and Findings tied to actual application behavior.
Try this evaluation
Run Biome on changed frontend files and use Composal on a preview of the same feature. Compare fixable source diagnostics with browser results for a success path and an error path.
- Coverage
- Which user outcomes must this release prove, and which specialist checks must stay in your existing stack?
- Setup
- Who prepares accounts, test data, permissions and access to the deployment being tested?
- Evidence
- Can the engineer reproduce a reported failure from the recording and steps, without asking the tester to investigate again?
- Ownership
- Who updates the checks when the product changes, and can the team review what a passing result actually proves?