Writing guides

The Best AI Grammar Checker for Developers (GitHub, Jira, and Markdown)

Improve code reviews, PR descriptions, and technical docs without breaking markdown code blocks or exposing secrets. Built specifically for engineers.

Writing is an essential part of software engineering. From pull request descriptions and code review feedback to Jira tickets, RFCs, and architecture documentation, clear technical writing accelerates code delivery and prevents costly misunderstandings. Yet most mainstream writing assistants are notoriously hostile to developers.

Why Mainstream Grammar Tools Break Developer Workflows

Traditional browser writing tools are designed for general essays and marketing copy, not technical codebases. When used in developer tools like GitHub, GitLab, Linear, or Jira, they create severe friction:

1. Stripping Markdown Backticks & Corrupting Code Syntax

Traditional tools frequently treat code blocks (`variableName` or ```typescript) as misspelled English words. When accepting automated suggestions, they often strip backticks, alter variable casing (changing userId to user id), and break syntax highlighting.

2. Privacy Concerns with Background Keylogging

Engineers frequently type API endpoints, configuration variables, and proprietary architectural details into browser inputs. Extensions that log every keystroke to external clouds create compliance violations and security risks.

3. Mouse-Heavy UI Distractions

Software engineers prefer keeping their hands on the keyboard. Having to reach for the mouse to hover over popup badges and click suggestion cards slows down fast terminal and browser workflows.

What Developers Look for in a Writing Assistant

An ideal grammar checker for technical workflows must satisfy strict criteria:

  • Syntax Preservation: Code backticks, inline commands, and indentation must remain 100% unaltered.
  • Sub-Second Speed: Editing a PR comment should take less than a second, not a 15-second trip to a separate AI website.
  • Zero Background Tracking: Execution must be triggered exclusively on-demand by the engineer.
  • Full Keyboard Control: Instant execution via shortcuts like ⌘⇧P or Alt+Shift+P.

How Polish Protects Developer Formatting

Polish was built from the ground up to respect technical syntax. When you write a PR review comment containing inline code:

Original draft with typos:

Please verify that `handleWebhookPayload()` dont throw unhandled rejection when `req.body` is empty.

Corrected in-place by Polish (~0.7s):

Please verify that `handleWebhookPayload()` doesn't throw an unhandled rejection when `req.body` is empty.

Notice how `handleWebhookPayload()` and `req.body` remain untouched with their backticks intact, while English grammatical errors are fixed seamlessly.

Supported Developer Surfaces in Chrome

Polish runs natively across all web-based developer tools:

  • GitHub & GitLab: Pull request summaries, issue templates, and commit messages.
  • Jira & Linear: Sprint ticket descriptions, bug reports, and task acceptance criteria.
  • Notion & Confluence: Engineering design docs, RFCs, and API documentation.
  • Slack & Discord: Engineering team updates and incident triage channels.

Conclusion

Engineers shouldn't have to compromise between error-free communication and clean markdown formatting. By combining sub-second Cerebras AI inference with trigger-only privacy and syntax preservation, Polish gives developers the fastest proofreading workflow in the browser.