Hotspots

Find and fix the code that's actually causing problems.

Hotspots analyzes your codebase to find functions that are both complex and frequently changed — the 20% of code responsible for 80% of your bugs, incidents, and feature delays.

Risk Landscape from a real 7,911-function codebase: 284 Critical (red), 491 High (orange). Each dot is a function — top-right are your hotspots.

hotspots analyze src/

# Results show your true priorities:
LRS   File                  Line  Function
12.4  src/api/billing.ts    142   processPlanUpgrade  # Critical — fix this first
9.8   src/auth/session.ts    67   validateSession     # High — watch closely
3.2   src/utils/format.ts    12   formatDate          # Low — safe to ignore

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Why Hotspots?

• Objective priorities — Stop arguing about what to refactor. The numbers tell you.
• CI protection — Block new high-complexity functions before they merge.
• Progress tracking — Show stakeholders: "Dropped from 31 critical functions to 23."

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Get Started

Install Hotspots →Set Up CI →CLI Reference →

For Contributors

Maintaining or extending Hotspots? Start with the Codebase Guide for the current implementation map, then use the Contributing Guide for development workflow.

Useful maintainer entry points:

• Analysis Pipeline — how files become reports, snapshots, and deltas.
• Contributor Change Guide — where to make common changes.
• Architecture Notes — design records, invariants, and historical deep dives.

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Supported Languages

Language	Extensions	Status
TypeScript	.ts, .tsx, .mts, .cts	Full support
JavaScript	.js, .jsx, .mjs, .cjs	Full support
Go	.go	Full support
Python	.py	Full support
Rust	.rs	Full support
Java	.java	Full support

All languages get accurate CC, ND, FO, NS metrics, LRS calculation, policy enforcement, suppression comments, delta analysis, and git history integration.