feat(slack): expose block kit helpers

.changeset/eight-hounds-serve.md

@@ -0,0 +1,5 @@
+---
+"@chat-adapter/slack": minor
+---
+
+expose runtime-free Block Kit helpers for Slack card conversion

packages/adapter-slack/package.json

@@ -25,6 +25,10 @@
     "./api": {
       "types": "./dist/api.d.ts",
       "import": "./dist/api.js"
+    },
+    "./blocks": {
+      "types": "./dist/blocks.d.ts",
+      "import": "./dist/blocks.js"
     }
   },
   "files": [

packages/adapter-slack/src/blocks/boundary.test.ts

@@ -0,0 +1,22 @@
+import { readdir, readFile } from "node:fs/promises";
+import { describe, expect, it } from "vitest";
+
+describe("blocks import boundary", () => {
+  it("does not import the full adapter or runtime packages", async () => {
+    const directory = new URL(".", import.meta.url);
+    const files = await readdir(directory);
+    const sources = await Promise.all(
+      files
+        .filter((file) => file.endsWith(".ts") && !file.endsWith(".test.ts"))
+        .map((file) => readFile(new URL(file, directory), "utf8"))
+    );
+    const source = sources.join("\n");
+
+    expect(source).not.toContain('from "chat"');
+    expect(source).not.toContain("from '@chat-adapter/shared'");
+    expect(source).not.toContain('from "@chat-adapter/shared"');
+    expect(source).not.toContain('from "@slack/web-api"');
+    expect(source).not.toContain('from "@slack/socket-mode"');
+    expect(source).not.toContain('from "../index"');
+  });
+});

packages/adapter-slack/src/blocks/errors.ts

@@ -0,0 +1,6 @@
+export class SlackBlockError extends Error {
+  constructor(message: string) {
+    super(message);
+    this.name = "SlackBlockError";
+  }
+}