From fdc88a753f760febeca4df9bd5f192522367aa12 Mon Sep 17 00:00:00 2001
From: Vincent Koc <vincentkoc@ieee.org>
Date: Tue, 7 Apr 2026 12:50:02 +0100
Subject: [PATCH] perf(plugins): slim boundary canary target

---
 scripts/check-extension-package-tsc-boundary.mjs     | 12 ++++++++++--
 src/plugins/contracts/rootdir-boundary-canary.ts     |  1 +
 .../check-extension-package-tsc-boundary.test.ts     |  4 ++--
 3 files changed, 13 insertions(+), 4 deletions(-)
 create mode 100644 src/plugins/contracts/rootdir-boundary-canary.ts

diff --git a/scripts/check-extension-package-tsc-boundary.mjs b/scripts/check-extension-package-tsc-boundary.mjs
index 5a1dcc2ddb1..b932994f421 100644
--- a/scripts/check-extension-package-tsc-boundary.mjs
+++ b/scripts/check-extension-package-tsc-boundary.mjs
@@ -24,6 +24,9 @@ const prepareBoundaryArtifactsBin = resolve(
 const extensionPackageBoundaryBaseConfig = "../tsconfig.package-boundary.base.json";
 const FAILURE_OUTPUT_TAIL_LINES = 40;
 const COMPILE_INPUT_EXTENSIONS = new Set([".ts", ".tsx", ".mts", ".cts", ".js", ".mjs", ".json"]);
+const ROOTDIR_BOUNDARY_CANARY_IMPORT_PATH =
+  "../../src/plugins/contracts/rootdir-boundary-canary.ts";
+const ROOTDIR_BOUNDARY_CANARY_OUTPUT_HINT = "src/plugins/contracts/rootdir-boundary-canary.ts";
 
 function parseMode(argv) {
   const modeArg = argv.find((arg) => arg.startsWith("--mode="));
@@ -636,7 +639,12 @@ async function runCanaryCheck(extensionIds) {
       try {
         writeFileSync(
           canaryPath,
-          'import * as foo from "../../src/cli/acp-cli.ts";\nvoid foo;\nexport {};\n',
+          [
+            `import { ROOTDIR_BOUNDARY_CANARY } from "${ROOTDIR_BOUNDARY_CANARY_IMPORT_PATH}";`,
+            "void ROOTDIR_BOUNDARY_CANARY;",
+            "export {};",
+            "",
+          ].join("\n"),
           "utf8",
         );
         writeFileSync(
@@ -666,7 +674,7 @@ async function runCanaryCheck(extensionIds) {
           error instanceof Error && typeof error.fullOutput === "string"
             ? error.fullOutput
             : String(error);
-        if (!output.includes("TS6059") || !output.includes("src/cli/acp-cli.ts")) {
+        if (!output.includes("TS6059") || !output.includes(ROOTDIR_BOUNDARY_CANARY_OUTPUT_HINT)) {
           throw error;
         }
       } finally {
diff --git a/src/plugins/contracts/rootdir-boundary-canary.ts b/src/plugins/contracts/rootdir-boundary-canary.ts
new file mode 100644
index 00000000000..3528633b80a
--- /dev/null
+++ b/src/plugins/contracts/rootdir-boundary-canary.ts
@@ -0,0 +1 @@
+export const ROOTDIR_BOUNDARY_CANARY = true;
diff --git a/test/scripts/check-extension-package-tsc-boundary.test.ts b/test/scripts/check-extension-package-tsc-boundary.test.ts
index 21c7354071f..330c90c4329 100644
--- a/test/scripts/check-extension-package-tsc-boundary.test.ts
+++ b/test/scripts/check-extension-package-tsc-boundary.test.ts
@@ -299,7 +299,7 @@ describe("check-extension-package-tsc-boundary", () => {
         [
           "--eval",
           [
-            "console.log('src/cli/acp-cli.ts');",
+            "console.log('src/plugins/contracts/rootdir-boundary-canary.ts');",
             "for (let index = 1; index <= 45; index += 1) console.log(`stdout ${index}`);",
             "console.error('TS6059');",
             "process.exit(2);",
@@ -309,7 +309,7 @@ describe("check-extension-package-tsc-boundary", () => {
       ),
     ).rejects.toMatchObject({
       message: expect.stringContaining("[... 6 earlier lines omitted ...]"),
-      fullOutput: expect.stringContaining("src/cli/acp-cli.ts"),
+      fullOutput: expect.stringContaining("src/plugins/contracts/rootdir-boundary-canary.ts"),
       kind: "nonzero-exit",
       elapsedMs: expect.any(Number),
     });