CodeLayers — Blast Radius

Know what breaks before you ship.

CodeLayers analyzes your codebase with tree-sitter and shows you exactly which files are affected by your current changes — functions, imports, type references — traced through the full dependency graph. Every save triggers a real-time re-analysis.

Features

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

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

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.

Requirements

CodeLayers requires the codelayers CLI for parsing and graph analysis.

curl -fsSL https://codelayers.ai/install.sh | bash

The extension will prompt you to install the CLI if it's not found in your PATH.

How it works

Open any Git repository in VS Code
The extension starts watching automatically
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

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

Features

Requirements

How it works

Settings

Commands

Links

License