Maintenance mode (#1113)

README.adoc

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+= Maintenance mode
+
+As our team is focused on other projects and the monorepo approach of this
+repository made it hard to maintain, we have decided to stop upgrading the
+content of this directory and to pass it in maintenance mode.
+
+Note that this decision doesn't impact at all
+https://github.com/input-output-hk/plutus[Plutus] the core language of Cardano,
+nor https://github.com/input-output-hk/plutus/tree/master/plutus-tx[Plutus-tx]
+the Haskell dialect to write Plutus contract. Both are still actively
+developed.
+
+Parts of this repository will probably been spinned-out into their own project,
+as we have done with the
+https://github.com/input-output-hk/cardano-node-emulator[Cardano-node-emulator],
+which gives you access to an emulated node that follows the same validation rule
+as a real node, or https://github.com/input-output-hk/marconi[Marconi], a
+library to define and run custom indexers.
+
+What is maintenance mode? In maintenance mode, no new feature will be actively
+developed by the team and we won't upgrade the existing dependencies.
+We'll welcome PR and we will review them though and we will do minor bug fixes.
+
+== Introduction
+
 image:https://img.shields.io/badge/policy-Cardano%20Engineering%20Handbook-informational[link=https://input-output-hk.github.io/cardano-engineering-handbook]
 
 The Plutus Application Framework, part of the Plutus Platform, is a framework for developing distributed applications using the Cardano blockchain.