diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 SimpleX Chat
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# ajmd
+
+Markdown that is data: one language that people read, agents write and code parses.
+
+This version is a placeholder; the first release is in preparation at https://github.com/simplex-chat/ajmd.
diff --git a/ajmd.cabal b/ajmd.cabal
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--- /dev/null
+++ b/ajmd.cabal
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+cabal-version:      2.4
+name:               ajmd
+version:            0.0.1
+synopsis:           Markdown that is data
+description:        One language that people read, agents write and code parses. Placeholder; the first release is in preparation.
+homepage:           https://github.com/simplex-chat/ajmd
+bug-reports:        https://github.com/simplex-chat/ajmd/issues
+license:            MIT
+license-file:       LICENSE
+author:             SimpleX Chat
+maintainer:         chat@simplex.chat
+copyright:          2026 SimpleX Chat
+category:           Text, Data
+build-type:         Simple
+extra-doc-files:    README.md
+
+source-repository head
+  type:     git
+  location: https://github.com/simplex-chat/ajmd
+  subdir:   haskell
+
+library
+  exposed-modules:  Data.Ajmd
+  hs-source-dirs:   src
+  build-depends:    base >=4.14 && <5
+  default-language: Haskell2010
diff --git a/src/Data/Ajmd.hs b/src/Data/Ajmd.hs
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--- /dev/null
+++ b/src/Data/Ajmd.hs
@@ -0,0 +1,1 @@
+module Data.Ajmd () where