# Kilden

> Kilden is a customer data platform: product analytics, feature flags, email campaigns and session replay built on one shared event foundation. This file indexes the developer documentation at https://docs.kilden.io — every page is also available as raw Markdown by appending .md to its URL, and the full content is at https://docs.kilden.io/llms-full.txt. This index covers the canonical English pages; human translations live under /es/, /pt/ and /fr/ (their .md routes work too).

## Getting started

- [Quickstart](https://docs.kilden.io/quickstart.md): From snippet to your first event in the live tail, in about two minutes.

## SDK reference

- [SDK overview & installation](https://docs.kilden.io/sdk.md): The Kilden web SDK — installation via snippet or npm, the client surface, and the guarantees it makes.
- [Configuration](https://docs.kilden.io/sdk/configuration.md): Every InitOptions field of the Kilden web SDK, with defaults and behavior notes.
- [Tracking events](https://docs.kilden.io/sdk/tracking.md): track(), super properties, flush, opt-out, and the shape of an event.
- [Identity methods](https://docs.kilden.io/sdk/identity.md): identify(), setPersonProperties(), reset() and setIdentityToken() — the SDK surface for user identity.
- [Plugins](https://docs.kilden.io/sdk/plugins.md): The before/enrichment/after event pipeline — transform, enrich or observe every event.
- [Feature flags (SDK)](https://docs.kilden.io/sdk/feature-flags.md): isFeatureEnabled, getFeatureFlag and onFeatureFlags — reading flags from the web SDK.
- [Session replay (SDK)](https://docs.kilden.io/sdk/session-replay.md): startSessionRecording, stopSessionRecording, getReplayId and the sessionRecording init option.

## Guides

- [Identifying users](https://docs.kilden.io/guides/identifying-users.md): How anonymous visitors become identified users, what identify() does to the person graph, and the rules that keep it safe.
- [Identity verification](https://docs.kilden.io/guides/identity-verification.md): Sign a short-lived JWT in your backend so nobody can send events as your users from a browser console.
- [Autocapture & privacy](https://docs.kilden.io/guides/autocapture.md): What autocapture records, what it never records, and every knob to control it.
- [Feature flags](https://docs.kilden.io/guides/feature-flags.md): Target flags by person properties and cohorts, roll out gradually with deterministic bucketing, and read them from the SDK.
- [Campaigns](https://docs.kilden.io/guides/campaigns.md): Event-triggered email journeys — triggers, audiences, delays, exits, template variables, and the delivery guarantees behind them.
- [Session replay](https://docs.kilden.io/guides/session-replay.md): Record and replay real sessions with sampling, strict privacy defaults, and 1:1 correlation with your event timeline.

## HTTP API

- [Capture API](https://docs.kilden.io/api/capture.md): POST /capture — the single write path for every event, from browsers, backends and integrations.
- [Decide API](https://docs.kilden.io/api/decide.md): POST /decide — evaluate feature flags and session-recording config for a distinct id.

## Concepts

- [Events & properties](https://docs.kilden.io/concepts/events-and-properties.md): The event model — immutable events, schema-less properties, and the reserved $ namespace.
- [Persons & identity](https://docs.kilden.io/concepts/persons-and-identity.md): How distinct ids map to persons, what merging means, and how traits behave.
- [Trust levels](https://docs.kilden.io/concepts/trust-levels.md): Client, verified and server — how much Kilden trusts an event, and which features care.
- [Cohorts](https://docs.kilden.io/concepts/cohorts.md): Precomputed person groups by traits and behavior — shared by feature flags and campaigns.

## AI & agents

- [Use Kilden with your AI editor](https://docs.kilden.io/ai/editor.md): Point Claude Code, Cursor or Claude Desktop at the Kilden docs through the @kilden/mcp server.
- [llms.txt](https://docs.kilden.io/ai/llms-txt.md): Machine-readable versions of these docs — llms.txt, llms-full.txt, and raw Markdown per page.

## Self-hosting

- [Self-hosting Kilden](https://docs.kilden.io/self-hosting.md): Self-hosting is coming with our open source release. Here's the architecture you'd be running.