> ## Documentation Index
> Fetch the complete documentation index at: https://docs.fallow.tools/llms.txt
> Use this file to discover all available pages before exploring further.

# Analysis

> What Fallow analyzes: dead code, duplication, architecture boundaries, auto-fix, and runtime-backed runtime coverage.

Fallow analyzes your codebase at two levels:

* **Static intelligence**: structure, reachability, duplication, complexity, boundaries, and flags
* **Runtime intelligence**: what actually executed in production

## Static analysis

<CardGroup cols={2}>
  <Card title="Dead code" icon="skull-crossbones" href="/analysis/dead-code">
    Unused files, exports, types, dependencies, circular deps, and more.
  </Card>

  <Card title="Duplication" icon="clone" href="/analysis/duplication">
    Find repeated blocks from exact to semantic clones.
  </Card>

  <Card title="Architecture boundaries" icon="diagram-project" href="/analysis/boundaries">
    Enforce import rules across layers and modules.
  </Card>

  <Card title="Auto-fix" icon="wand-magic-sparkles" href="/analysis/auto-fix">
    Remove unused exports and dependencies automatically.
  </Card>
</CardGroup>

## Runtime analysis

<CardGroup cols={1}>
  <Card title="Runtime coverage" icon="chart-network" href="/analysis/runtime-coverage">
    Add runtime evidence to `fallow health` for hot paths, cold paths, and deletion confidence.
  </Card>
</CardGroup>

## Supporting topics

<CardGroup cols={2}>
  <Card title="Production mode" icon="box" href="/analysis/production-mode">
    Exclude test and dev files from analysis.
  </Card>

  <Card title="Non-JS file types" icon="file" href="/analysis/file-types">
    How Fallow handles JSON, HTML, and other file types.
  </Card>

  <Card title="CSS, SCSS, and Tailwind" icon="paintbrush" href="/analysis/css-analysis">
    AST-based CSS Module, SCSS, and Tailwind tracking.
  </Card>

  <Card title="Debugging" icon="bug" href="/analysis/debugging">
    Trace why something is reported (or missed).
  </Card>

  <Card title="Limitations" icon="circle-exclamation" href="/analysis/limitations">
    What Fallow does not cover and why.
  </Card>
</CardGroup>