What Fallow Cloud sees in one real capture.

leveret.run is the founder's own public Next.js 16 app. This capture from its development server is matched to the function list of the same commit.

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CalledFunctions that ran at least once: 76
Never calledFunctions the capture saw with zero calls: 135
UntrackedFunctions in the code that this capture could not match: 2,600

An untracked function is not a function with zero calls.

A called function ran at least once. A never-called function was tracked and had zero calls in this capture. An untracked function has no count at all, because nothing in the capture matched it, and Fallow Cloud never treats it as a zero.

The names in the first rows are what the build turned your functions into. With a source map they show your own function names.

Showing 6 of 6 example rows.

Functions from the capture, with their runtime state
State	Function	File	Calls	Why
Called	`h`	`.next/dev/server/chunk-1.js`	61 calls	Generated symbol. The capture had no matching source map.
Called	`a`	`.next/dev/server/chunk-1.js`	34 calls	Generated symbol. The capture had no matching source map.
Never called	`R`	`.next/dev/server/chunk-1.js`	0 calls	V8 tracked it and counted zero calls in this capture.
Never called	`formatError`	`.next/dev/server/chunk-1.js`	0 calls	V8 tracked it and counted zero calls in this capture.
Untracked	`HomePageContent`	`src/app/(marketing)/home-content.tsx:15`	No count	It is in the static inventory, but no count in the capture matched it.
Untracked	`ChartLegendContent`	`src/components/chart/chart.tsx:307`	No count	It is in the static inventory, but no count in the capture matched it.

The capture comes from a public repository.

It was taken on 22 July 2026 from next dev at commit 9c5cf20. One V8 worker reported 211 generated functions: 76 called and 135 with zero calls. The static inventory held 2,600 more functions that this short capture could not map. The page uses no customer data. The generated symbols keep their bundle names, because the capture had no matching source maps.

A capture like this one is the raw input. Fallow Cloud puts it on the map of the whole codebase and decides whether a never-called function is dead or only cold. The product page explains how.