---
title: Evolution overview
description: "The Evolution sub-section contains all standards that are defined by the Tact Foundation and are used in the evolution process of the Tact and TON ecosystem."
sidebar:
  label: Overview
  order: 0
---

import { LinkCard, CardGrid } from '@astrojs/starlight/components';

This sub-section contains all standards defined by the Tact Foundation that are used in the evolution process of the Tact and TON ecosystem. Additionally, it features TEPs (TON Enhancement Proposals) and the up-to-date changelog of Tact updates.

## Open Tact Proposals (OTPs)

<CardGrid>
  <LinkCard
    title="OTP-001"
    href="/ref/evolution/otp-001"
  />
  <LinkCard
    title="OTP-002"
    href="/ref/evolution/otp-002"
  />
  <LinkCard
    title="OTP-003"
    href="/ref/evolution/otp-003"
  />
  <LinkCard
    title="OTP-004"
    href="/ref/evolution/otp-004"
  />
  <LinkCard
    title="OTP-005"
    href="/ref/evolution/otp-005"
  />
  <LinkCard
    title="OTP-006"
    href="/ref/evolution/otp-006"
  />
</CardGrid>

## TON Enhancement Protocols (TEPs)

The main goal of TON Enhancement Proposals is to provide a convenient and formal way to propose changes to TON Blockchain and standardize interactions between different parts of the ecosystem. Proposal management is done using GitHub pull requests; the process is formally described in [TEP-1](https://github.com/ton-blockchain/TEPs/blob/master/text/0001-tep-lifecycle.md).

List of [merged TEPs](https://github.com/ton-blockchain/TEPs#merged-teps).

## Changelog

All notable changes to the main Tact repository are documented in the [CHANGELOG.md](https://github.com/tact-lang/tact/blob/main/dev-docs/CHANGELOG.md).
