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

# Stdout

> Print records to stdout — for local development and debugging.

`connectors/stdout` writes records to stdout instead of a real destination.
It shows up in the [embedding
example](/pages/guides/deployment/embedding-as-a-library) alongside the
PostgreSQL source as the fastest way to see a pipeline run end-to-end with no
external sink to configure.

## Output shape

Each record prints as one NDJSON line — `{"id", "op", "data"}` — and
`Commit` prints a final `# {...}` summary line (prefixed with `#` so it's
distinguishable from the data lines on the same stream) with the per-resource
record and byte counts for the run.

It's also the reference implementation a real sink is checked against: no
buffering or transactional state beyond per-run accounting, so `Abort` is
just a marker — about as simple as `filament.Sink` gets.

## Modes

Supports `Append` and `SnapshotReplace` write policies (see [Replication
modes](/pages/guides/concepts/replication-modes)).