# Vendelieu Telegram Bot Create Input Chain

> Create Input Chain

- Skill: `tomevault-io/vendelieu-telegram-bot-create-input-chain` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/vendelieu-telegram-bot-create-input-chain`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/vendelieu-telegram-bot-create-input-chain/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/vendelieu-telegram-bot-create-input-chain

---


# Create Input Chain

## Quick Start

Define a chain inside `bot.setFunctionality { }`. Set `bot.inputListener[user] = "id"` to start. The chain advances automatically after each step.

```kotlin
bot.setFunctionality {
    onCommand("/start") {
        message { "What's your name?" }.send(user, bot)
        bot.inputListener[user] = "conversation"
    }
    inputChain("conversation") {
        message { "Nice to meet you, ${message.text}!" }.send(update.getUser(), bot)
        message { "What's your favorite food?" }.send(update.getUser(), bot)
    }.breakIf({ message.text == "peanut butter" }) {
        message { "Oh, too bad, I'm allergic." }.send(update.getUser(), bot)
    }.andThen {
        message { "Thanks! You said: ${message.text}" }.send(update.getUser(), bot)
    }
}
bot.handleUpdates()
```

## Structure

- **inputChain("id") { }** — First step. Block runs when user sends a message while `inputListener` is `"id"`.
- **andThen { }** — Next step. Chain advances to this step after the previous block runs.
- **breakIf(condition, repeat = true, block)** — On current step: if condition is true, run block. If `repeat = true`, stay on current step (user can re-enter). If `repeat = false`, do not re-register.

## Context

Inside each block, `ProcessingContext` / `ActivityCtx` provides:

- `update` — the ProcessedUpdate
- `message` — shortcut for message content (when applicable)
- `update.getUser()` — user reference

## When to Use

- **Input chain**: Simple linear flows, no typed state, quick setup
- **Wizard**: Complex validation, typed state, `Transition.JumpTo`/`Retry`, state managers

## Reference

- [InputChainBuilder.kt](telegram-bot/src/commonMain/kotlin/eu/vendeli/tgbot/core/InputChainBuilder.kt)
- [README.md](README.md) — inputChain example

---
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<!-- tomevault:4.0:skill_md:2026-04-11 -->