diff --git a/src/discover/registry.rs b/src/discover/registry.rs
index 03e606a5..dfd82308 100644
--- a/src/discover/registry.rs
+++ b/src/discover/registry.rs
@@ -1443,6 +1443,51 @@ mod tests {
         );
     }
 
+    // --- docker-compose (legacy hyphenated CLI) ---
+
+    #[test]
+    fn test_rewrite_docker_compose_legacy_ps() {
+        assert_eq!(
+            rewrite_command("docker-compose ps", &[]),
+            Some("rtk docker compose ps".into())
+        );
+    }
+
+    #[test]
+    fn test_rewrite_docker_compose_legacy_logs() {
+        assert_eq!(
+            rewrite_command("docker-compose logs web", &[]),
+            Some("rtk docker compose logs web".into())
+        );
+    }
+
+    #[test]
+    fn test_rewrite_docker_compose_legacy_logs_no_service() {
+        assert_eq!(
+            rewrite_command("docker-compose logs", &[]),
+            Some("rtk docker compose logs".into())
+        );
+    }
+
+    #[test]
+    fn test_rewrite_docker_compose_legacy_build() {
+        assert_eq!(
+            rewrite_command("docker-compose build", &[]),
+            Some("rtk docker compose build".into())
+        );
+    }
+
+    #[test]
+    fn test_rewrite_docker_compose_legacy_up_skipped() {
+        // unsupported subcommand — must not rewrite
+        assert_eq!(rewrite_command("docker-compose up -d", &[]), None);
+    }
+
+    #[test]
+    fn test_rewrite_docker_compose_legacy_down_skipped() {
+        assert_eq!(rewrite_command("docker-compose down", &[]), None);
+    }
+
     // --- AWS / psql (PR #216) ---
 
     #[test]
diff --git a/src/discover/rules.rs b/src/discover/rules.rs
index 32499e29..a2b628a1 100644
--- a/src/discover/rules.rs
+++ b/src/discover/rules.rs
@@ -31,6 +31,7 @@ pub const PATTERNS: &[&str] = &[
     r"^(npx\s+|pnpm\s+)?playwright",
     r"^(npx\s+|pnpm\s+)?prisma",
     r"^docker\s+(ps|images|logs|run|exec|build|compose\s+(ps|logs|build))",
+    r"^docker-compose\s+(ps|logs|build)",
     r"^kubectl\s+(get|logs|describe|apply)",
     r"^tree(\s|$)",
     r"^diff\s+",
@@ -242,6 +243,14 @@ pub const RULES: &[RtkRule] = &[
         subcmd_savings: &[],
         subcmd_status: &[],
     },
+    RtkRule {
+        rtk_cmd: "rtk docker compose",
+        rewrite_prefixes: &["docker-compose"],
+        category: "Infra",
+        savings_pct: 85.0,
+        subcmd_savings: &[],
+        subcmd_status: &[],
+    },
     RtkRule {
         rtk_cmd: "rtk kubectl",
         rewrite_prefixes: &["kubectl"],