diff --git a/.changeset/calm-contexts-capture.md b/.changeset/calm-contexts-capture.md
deleted file mode 100644
index c92828d5..00000000
--- a/.changeset/calm-contexts-capture.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'pypi/posthog': patch
----
-
-Respect exception autocapture defaults for new contexts.
diff --git a/.changeset/fuzzy-pandas-scope.md b/.changeset/fuzzy-pandas-scope.md
deleted file mode 100644
index 7e1e359c..00000000
--- a/.changeset/fuzzy-pandas-scope.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'pypi/posthog': minor
----
-
-Add context helper methods to custom PostHog client instances.
diff --git a/.changeset/green-ravens-validate.md b/.changeset/green-ravens-validate.md
deleted file mode 100644
index 1115db2b..00000000
--- a/.changeset/green-ravens-validate.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'pypi/posthog': patch
----
-
-Validate custom event UUIDs before sending events.
diff --git a/.changeset/polite-wolves-warn.md b/.changeset/polite-wolves-warn.md
deleted file mode 100644
index fd6be0e1..00000000
--- a/.changeset/polite-wolves-warn.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'pypi/posthog': patch
----
-
-Prefix PostHog SDK log messages so they remain identifiable with message-only logging formatters.
diff --git a/.changeset/sweet-ravens-tap.md b/.changeset/sweet-ravens-tap.md
deleted file mode 100644
index 8138f288..00000000
--- a/.changeset/sweet-ravens-tap.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-'pypi/posthog': patch
----
-
-Send batch `sent_at` using the backend-supported snake_case field.
diff --git a/.changeset/brave-otters-mask.md b/.sampo/changesets/brave-otters-mask.md
similarity index 100%
rename from .changeset/brave-otters-mask.md
rename to .sampo/changesets/brave-otters-mask.md
diff --git a/.changeset/quiet-horses-type.md b/.sampo/changesets/quiet-horses-type.md
similarity index 100%
rename from .changeset/quiet-horses-type.md
rename to .sampo/changesets/quiet-horses-type.md
diff --git a/RELEASING.md b/RELEASING.md
index 94ce2291..9c517fbd 100644
--- a/RELEASING.md
+++ b/RELEASING.md
@@ -8,3 +8,6 @@ This repository uses [Sampo](https://github.com/bruits/sampo) for versioning and
 4. Approve the release in Slack when prompted — this triggers the version bump, publishes both `posthog` and the `posthoganalytics` mirror package to PyPI, creates a git tag, and creates a GitHub Release
 
 You can also trigger a release manually via the workflow's `workflow_dispatch` trigger (still requires pending changesets).
+
+> [!IMPORTANT]
+> Changesets must live in **`.sampo/changesets/`** (this is where `sampo add` puts them). Do **not** create them in the legacy `.changeset/` directory — Sampo and the `Release` workflow only read `.sampo/changesets/*.md`, so a changeset placed anywhere else is silently ignored and **no release is triggered**.