CodeLayers — Blast Radius

You changed one file. 417 files broke.

CodeLayers shows you the blast radius of every code change before you ship. It traces function calls, imports, and type references through your full dependency graph using tree-sitter — and updates on every save.

Blast radius sidebar with hop-colored file decorations

Zero setup

The CLI installs automatically when you first open the extension. No manual steps.

Works in VS Code and Cursor.

Features

Blast Radius sidebar — Every affected file grouped by hop distance from your change.

Sidebar tree view

Hop-colored decorations — Files are color-coded by distance in the file explorer and editor gutters:

Red — changed file (hop 0)
Orange — direct dependents (hop 1)
Yellow — 2 hops away
Green — 3 hops away
Blue — 4+ hops away

Editor decorations with hop colors

CodeLens annotations — Inline caller counts and "trace downstream" links above affected symbols.

Real-time watch mode — Re-analyzes on every save with 150ms debounce. No manual triggers needed.

Smart filtering — Cycle between all dependencies, functions only, or imports only.

10 languages — Rust, TypeScript/JavaScript, Python, Java, Go, C++, C#, Ruby, PHP, Swift.

How it works

Open any Git repository
The extension starts watching automatically (installs the CLI if needed)
Edit and save a file — the sidebar updates with every file affected by your change
Click any file in the blast radius to open it with its git diff
Use CodeLens links to trace callers upstream or dependents downstream

CI/CD

Add blast radius to your pull requests with the CodeLayers GitHub Action. Posts a 3D visualization link as a PR comment automatically.

Explore any repo

Paste any public GitHub PR or repo URL into codelayers.ai/explore to visualize it in 3D — no account required.

Settings

Setting	Default	Description
`codelayers.maxHops`	`3`	Maximum dependency chain depth (1-10)
`codelayers.showCodeLens`	`true`	Show inline caller counts above symbols
`codelayers.defaultFilterMode`	`all`	Filter: `all`, `functions`, or `imports`
`codelayers.warningThreshold`	`20`	Status bar warns when this many files are affected
`codelayers.cliPath`	auto-detect	Path to `codelayers` binary

Commands

All commands are available via the Command Palette (Cmd+Shift+P):

CodeLayers: Analyze Blast Radius — Restart analysis
CodeLayers: Refresh — Force refresh
CodeLayers: Filter Dependencies — Cycle filter mode
CodeLayers: Toggle Blast Radius On/Off — Enable/disable
CodeLayers: Toggle Blast Radius Decorations — Show/hide file decorations
CodeLayers: Show Callers — List files that call a symbol
CodeLayers: Trace Downstream — List files that depend on a file
CodeLayers: Go to Symbol — Jump to a symbol definition

License

See LICENSE for details.

CodeLayers — Blast Radius

CodeLayers

CodeLayers — Blast Radius

Zero setup

Features

How it works

CI/CD

Explore any repo

Settings

Commands

Links

License