diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 0000000..b357d67
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,15 @@
+## Background
+
+<!-- Explain the problem or opportunity, the relevant current state, and why this change is needed. -->
+
+## Implementation Approach
+
+<!-- Describe the change, important design decisions, and scope boundaries. Use bullets when appropriate. -->
+
+## Testing Approach
+
+<!-- List the exact automated commands and manual or integration checks performed. State any checks not run and why. -->
+
+## Review Perspectives / Points of Concern
+
+<!-- Direct reviewers to material risks, trade-offs, compatibility, security, performance, accessibility, rollout, or rollback concerns. Write "None" when there are no special concerns. -->
diff --git a/AGENTS.md b/AGENTS.md
index b531331..c3ee22e 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -32,6 +32,7 @@ The canonical language contract is `stack-sh/specification`. Never introduce syn
 - Keep GitHub Actions on their latest supported major versions; Dependabot checks for updates weekly.
 - Do not use panic-producing `unwrap`, `expect`, `panic`, `unreachable`, `todo`, or `unimplemented` macros in any target; package-level Clippy lints enforce this boundary.
 - Write repository content, code comments, issues, and pull requests in English.
+- Write pull request titles and bodies in English, and follow `.github/pull_request_template.md` without removing or renaming its sections.
 - Keep temporary implementation plans and task lists outside the repository under `/tmp`.
 
 ## Boundaries