diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
index cc15e12..0fb85c0 100644
--- a/.github/copilot-instructions.md
+++ b/.github/copilot-instructions.md
@@ -50,3 +50,30 @@ Commands that need user input use `InputModal` or `TwoInputModal` (in `src/modal
 - **The `perLine()` helper** in `case.ts` applies a function to each line independently. Use it for per-line transforms that don't need cross-line context.
 - **Multi-selection aware**: All commands must work with multiple simultaneous selections. Use `transformSelections()` or iterate `editor.listSelections()` in reverse.
 - **Obsidian API is external**: `obsidian`, `electron`, and `@codemirror/*` are externalized by esbuild — never bundle them.
+- **Pull request descriptions must use the required changelog markup**: PR descriptions must contain the expected sections for the Release pipeline used to update changelog and release notes. See the following "Pull request description content" section.
+
+### Pull request description content
+
+PR descriptions must contain the expected sections for the Release pipeline used to update the changelog and release notes. Follow the [PULL_REQUEST_TEMPLATE.md](./PULL_REQUEST_TEMPLATE.md) template and fill in the description and type of change (major, minor, patch). Note that the markup comment tags (`<!--changelog-description-start-->`, `<!--changelog-description-end-->`, `<!--changelog-type-start-->`, and `<!--changelog-type-end-->`) are required for the pipeline to identify the sections. The description should be concise but informative, as it will be used in the changelog and release notes.
+
+ The type of change must be accurately indicated to ensure proper versioning. **Exactly one** of the Major/Minor/Patch checkboxes must be checked — the release workflow picks the first matching checked box (Major → Minor → Patch) and will fail to create a release if none are checked.
+
+Sample:
+
+```md
+## Description
+
+<!--changelog-description-start-->
+Fix code quality issues: sentence case, promise handling, deprecated functions, settings headings
+<!--changelog-description-end-->
+
+## Type of Change
+
+<!--changelog-type-start-->
+
+- [ ] **Major** – Breaking change (requires a new major version bump)
+- [ ] **Minor** – New feature, backward-compatible (requires a new minor version bump)
+- [x] **Patch** – Bug fix or internal improvement, backward-compatible (requires a new patch version bump)
+
+<!--changelog-type-end-->
+```