Platform engineers migrating APIs
Use Grit to rewrite repeated API patterns across many repositories while keeping the transformation rule reviewable.
Skip if:
The migration requires full runtime behavior analysis rather than source pattern changes.
Last verified
Automate large-scale code migrations with GritQL, an MIT-licensed open source tool for framework upgrades, refactors, and API cleanup.
Use Grit to rewrite repeated API patterns across many repositories while keeping the transformation rule reviewable.
The migration requires full runtime behavior analysis rather than source pattern changes.
Use Grit to find and fix old imports, function calls, and framework idioms across a codebase.
The affected code appears in only a few files and a manual edit is faster.
Use Grit when migration patterns recur and should be stored, shared, and composed across future upgrades.
Your organization already has mature language-specific codemod tooling and no cross-language needs.
Large code migrations rarely fit simple search and replace. Regex misses syntax, AST codemods take time to write, and language-specific frameworks force teams to rebuild similar transformations for each stack. The result is slow migration work, hard-to-review scripts, and repeated manual fixes across many repositories.
Any code snippet can become a GritQL query with metavariables for the parts that change. This makes many migrations easier to read than imperative AST traversal code.
GritQL can find patterns, add side conditions, and rewrite matches with `=>`. Teams can move from exploration to automated remediation without changing tools.
JavaScript, TypeScript, Python, JSON, Java, Terraform, Solidity, CSS, Markdown, YAML, Rust, Go, and SQL support makes Grit useful across mixed codebases.
Grit links to a standard library with 200+ patterns, which helps teams reuse migration logic instead of writing every transformation from scratch.
Install the Grit CLI on a developer machine or CI runner, then initialize configuration in the repository you want to rewrite.
```bash
npm install --location=global @getgrit/cli
grit init
grit apply react_to_hooks
```GritQL is a declarative query language for searching, linting, and modifying source code.
Grit matches code structure with metavariables and side conditions, while regex matches text. That makes Grit safer for many syntax-aware migrations.
Grit supports JavaScript, TypeScript, Python, JSON, Java, Terraform, Solidity, CSS, Markdown, YAML, Rust, Go, and SQL.
Alternative to
SonarQube
Diagnose and fix your React code effortlessly
Alternative to
Portkey
Open-source AI gateway with 23+ providers, failover, and MCP support.
Alternative to
Fivetran
Self-hosted ETL on DuckDB with 385 connectors and no per-row billing.
Alternative to
Conductor
Agent runtime that keeps terminals alive across machines
Alternative to
CodeDashboard
Review code changes as architecture maps, not line diffs
Alternative to
Google Vertex AI Agent Engine
Declarative runtime for autonomous agent workloads
Run Grit on your own server
Self-host Grit on a Hostinger VPS.
Deploy on HostingerFeatured
Alternative toClaude Managed Agents
Open-source agent deployment API. Self-host or use Omnara Cloud.
Alternative to
Superhuman
AI email assistant that drafts replies and clears your inbox
Alternative to
Grok Bot
AI teammates you own: your keys, your model, your machine.
The projects we add and every new guide. Free, unsubscribe any time.
Claude Code to 
OpenCode
Jira to 
Windshift
Notion to 
AppFlowy
Slack to 
Mattermost
Linear to 
GitLab
Wispr Flow to 
Handy
CapCut to 
Concat
Grok Bot to 
rakazo
Superhuman to 
Inbox Zero
Airtable to 
AITable
Muse to 
OpenClaw
GitHub Copilot to 
Cline
Datadog to 
Netdata
Microsoft Teams to 
Rocket.Chat
Pinecone to 
Qdrant
Zapier to 
n8n
Devin AI to 
OpenHands
Firebase to 
Supabase
1Password to 
KeePassXCConfluence to 
Docmost
Contentful to 
Strapi
Adobe Premiere Pro to 
Shotcut
ChatGPT to 
AnythingLLM
LangSmith to 
Langfuse
