diff --git a/PLAN.md b/PLAN.md
new file mode 100644
index 0000000..b32f7c9
--- /dev/null
+++ b/PLAN.md
@@ -0,0 +1,31 @@
+# To-do
+
+1. Port Pre & Code changes from my homepage upstream to Zaduma
+2. Look for more changes to port from my homepage upstream to Zaduma
+3. Get Codex and Claude to write tests for these features
+4. Update Astro, one major at a time
+
+---
+
+# Next steps
+
+Okay, I feel like I don't really want Expressive Code now, and I'm considering
+once again configuring @shikijs/rehype with twoslash like in fumadocs.
+
+As this Fumadocs exposes Shiki transformer I can just try to import its packages
+despite of the fact we're not using Fumadocs.
+
+## Migrating Shiki
+
+If Astro's internal Shiki won't be enough
+
+1. Migrate Shiki one major at a time (to v2, then to v3).
+2. Ensure we use CSS vars instead of displaying two code blocks (Shiki Dual
+   Themes)
+
+## Maybe:
+
+1. Install Astro Expressive Code:
+   https://docs.astro.build/en/guides/syntax-highlighting/
+2. Install Expessive Code Twoslash: https://twoslash.matthiesen.dev/
+3. Run visual regression tests against my homepage
diff --git a/test/visual-regression.spec.ts b/test/visual-regression.spec.ts
index 1235521..272eb14 100644
--- a/test/visual-regression.spec.ts
+++ b/test/visual-regression.spec.ts
@@ -61,14 +61,20 @@ describe("visual regression", async () => {
 
   it("matches screenshot on index page", async () => {
     const screenshot = await page.screenshot({ fullPage: true });
-    expect(screenshot).toMatchImageSnapshot();
+    expect(screenshot).toMatchImageSnapshot({
+      failureThreshold: 10,
+      failureThresholdType: "pixel",
+    });
   });
 
   it("matches screenshots in blog posts", { timeout: 60_000 }, async () => {
     for (const post of postsInFS) {
       await page.goto(`http://localhost:4321/${post}`);
       const screenshot = await page.screenshot({ fullPage: true });
-      expect(screenshot).toMatchImageSnapshot();
+      expect(screenshot).toMatchImageSnapshot({
+        failureThreshold: 10,
+        failureThresholdType: "pixel",
+      });
     }
   });
 
@@ -79,6 +85,8 @@ describe("visual regression", async () => {
 
 declare module "vitest" {
   interface Assertion<T> {
-    toMatchImageSnapshot: () => T;
+    toMatchImageSnapshot: (
+      ...params: Parameters<typeof toMatchImageSnapshot>
+    ) => T;
   }
 }