diff --git a/ouroboros-consensus-cardano/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md b/ouroboros-consensus-cardano/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md
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+++ b/ouroboros-consensus-cardano/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md
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+### Non-Breaking
+
+- Add instances for `TxMeasureMetrics` to Cardano block types
+
diff --git a/ouroboros-consensus-diffusion/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md b/ouroboros-consensus-diffusion/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md
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+++ b/ouroboros-consensus-diffusion/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md
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+### Breaking
+
+- Add `TxMeasureMetrics (TxMeasure blk)` constraint to `CanHardFork`
+
diff --git a/ouroboros-consensus/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md b/ouroboros-consensus/changelog.d/20250213_115925_fraser.murray_localtxmonitor_measures.md
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+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Patch
+
+- A bullet item for the Patch category.
+
+-->
+<!--
+### Non-Breaking
+
+- A bullet item for the Non-Breaking category.
+
+-->
+<!--
+### Breaking
+
+- A bullet item for the Breaking category.
+
+-->