diff --git a/LICENSE b/LICENSE
index c00ca305..de106cd2 100644
--- a/LICENSE
+++ b/LICENSE
@@ -201,26 +201,6 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 
-================================================================================
-Contributions from other Apache Software Foundation projects
-================================================================================
-
-This product incorporates project-agnostic code contributed from
-other Apache Software Foundation projects:
-
-- Apache Airflow (https://airflow.apache.org/) — the framework that
-  became this project was first developed and proven within Apache
-  Airflow, already structured under Apache License 2.0 for reuse
-  inside and outside the ASF.
-- Apache Groovy (https://groovy.apache.org/) — contributions from
-  the Groovy PMC at the early stage of this project.
-
-Apache Airflow
-Copyright 2016-2026 The Apache Software Foundation
-
-Apache Groovy
-Copyright 2003-2026 The Apache Software Foundation
-
 ================================================================================
 Third-party content
 ================================================================================
@@ -228,4 +208,6 @@ Third-party content
 This product includes substantially-modified content adapted from the
 "skill-creator" skill in the awesome-claude-skills repository by
 Julius Brussee (https://github.com/JuliusBrussee/awesome-claude-skills),
-licensed under the Apache License, Version 2.0.
+licensed under the Apache License, Version 2.0. See
+skills/write-skill/SKILL.md § "Provenance" for the specific upstream
+commit and the scope of the framework's modifications.
diff --git a/NOTICE b/NOTICE
index f14fb039..a8571a85 100644
--- a/NOTICE
+++ b/NOTICE
@@ -3,3 +3,13 @@ Copyright 2026 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (https://www.apache.org/).
+
+Portions of this product originated in other Apache Software Foundation
+projects. The required attribution lines from their NOTICE files are
+reproduced below.
+
+Apache Airflow
+Copyright 2016-2026 The Apache Software Foundation
+
+Apache Groovy
+Copyright 2003-2026 The Apache Software Foundation
diff --git a/README.md b/README.md
index 48f35f23..af135b0f 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@
   - [Skill families](#skill-families)
     - [External skill sources](#external-skill-sources)
   - [Maintenance](#maintenance)
+  - [Acknowledgements](#acknowledgements)
   - [Cross-references](#cross-references)
 
 <!-- END doctoc generated TOC please keep comment here to allow auto update -->
@@ -208,6 +209,17 @@ maintenance:
 - `/magpie-setup override <framework-skill>` — open or
   scaffold an override file for a framework skill.
 
+## Acknowledgements
+
+Apache Magpie was first developed and proven inside **Apache Airflow**, and was
+maintained for a time as the `apache/airflow-steward` repository under the
+Airflow PMC before being renamed and established as its own project. It also
+incorporates early skill work contributed by way of the **Apache Groovy**
+community. All of that code carries the same rightsholder — Copyright The Apache
+Software Foundation, under the Apache License 2.0 — so it is not a third-party
+inclusion; the required attribution lines from the originating projects' NOTICE
+files are reproduced in [`NOTICE`](NOTICE).
+
 ## Cross-references
 
 - [`MISSION.md`](MISSION.md) — **draft** project-establishment proposal: motivation, scope, design commitments, initial PMC composition target.