diff --git a/claude-code/CHANGELOG.md b/claude-code/CHANGELOG.md
index 01dcf56..f8c38f2 100644
--- a/claude-code/CHANGELOG.md
+++ b/claude-code/CHANGELOG.md
@@ -2,6 +2,15 @@
 
 All notable changes to the AgenTrust for Claude Code plugin.
 
+## Unreleased
+
+### Breaking
+- Drift detection now requires the separately published
+  `agentrust-capture-core` package; the previous vendored fallback was removed.
+  Existing installations must run `pip install agentrust-capture-core` before
+  their next session. The Claude Code marketplace manifest cannot declare or
+  install Python package dependencies.
+
 ## 0.2.0
 
 First launch-ready release. Since 0.1.0 the plugin can actually be installed, the
diff --git a/copilot/CHANGELOG.md b/copilot/CHANGELOG.md
new file mode 100644
index 0000000..3bb50c3
--- /dev/null
+++ b/copilot/CHANGELOG.md
@@ -0,0 +1,12 @@
+# Changelog
+
+All notable changes to the AgenTrust Copilot drift check.
+
+## Unreleased
+
+### Breaking
+- Drift detection now requires the separately published
+  `agentrust-capture-core` package; the previous vendored fallback was removed.
+  Existing installations and workflows must run
+  `pip install agentrust-capture-core` before invoking the check. GitHub Actions
+  workflow metadata does not install Python package dependencies automatically.
diff --git a/plugins/agentrust-codex/CHANGELOG.md b/plugins/agentrust-codex/CHANGELOG.md
new file mode 100644
index 0000000..d7aa7b4
--- /dev/null
+++ b/plugins/agentrust-codex/CHANGELOG.md
@@ -0,0 +1,12 @@
+# Changelog
+
+All notable changes to the AgenTrust for Codex plugin.
+
+## Unreleased
+
+### Breaking
+- Drift detection now requires the separately published
+  `agentrust-capture-core` package; the previous vendored fallback was removed.
+  Existing installations must run `pip install agentrust-capture-core` before
+  their next session. Codex plugin metadata cannot currently declare or install
+  Python package dependencies.
diff --git a/scheduled-agents/CHANGELOG.md b/scheduled-agents/CHANGELOG.md
new file mode 100644
index 0000000..6fd5415
--- /dev/null
+++ b/scheduled-agents/CHANGELOG.md
@@ -0,0 +1,12 @@
+# Changelog
+
+All notable changes to the AgenTrust scheduled-agents plugin.
+
+## Unreleased
+
+### Breaking
+- Drift detection now requires the separately published
+  `agentrust-capture-core` package; the previous vendored fallback was removed.
+  Existing installations must run `pip install agentrust-capture-core` before
+  their next session. The Claude Code marketplace manifest cannot declare or
+  install Python package dependencies.