Add similarweb extension

[alexi-build]

Description

Fetch Similarweb analytics, which include rankings, traffic trends, and audience insights for any website, and explore the locally stored history of your lookups.

Commads/Features

• Show Website Data: Fetch website analytics for any domain or the active browser tab
• History: Browse and manage previously fetched website snapshots stored locally

demo.yafw.balanced.mp4

Screencast

Checklist

• I read the extension guidelines
• I read the documentation about publishing
• I ran npm run build and tested this distribution build in Raycast
• I checked that files in the assets folder are used by the extension itself
• I checked that assets used by the README are placed outside of the metadata folder

[raycastbot]

Congratulations on your new Raycast extension! 🚀

We're currently experiencing a high volume of incoming requests. As a result, the initial review may take up to 10-15 business days.

Once the PR is approved and merged, the extension will be available on our Store.

[greptile-apps]

Greptile Summary

This PR adds a new Similarweb extension with two commands: Show Website Data (fetches analytics for a domain or active browser tab) and History (browses locally-stored snapshots). The code is well-structured with solid error handling, runtime type guards, and clean separation of concerns across api/, lib/, and the two command files.

• P1 – misleading toast in show-website-data.tsx: when saveSnapshot fails, Toast.Style.Failure is displayed with the title \"Loaded website data\" — a red failure indicator whose title reads as a success, creating contradictory UX. The title should be changed to reflect the actual failure (e.g. \"Could Not Save Snapshot\").

Confidence Score: 4/5

Safe to merge after fixing the misleading toast title on snapshot save failure.

One P1 finding: the toast style/title mismatch when history persistence fails gives users contradictory signals about what went wrong. No P0 issues. All previously flagged concerns (missing categories, unused @raycast/utils) are resolved in the current state of the PR.

extensions/similarweb/src/show-website-data.tsx — misleading Toast.Style.Failure title on lines 62–66.

Important Files Changed

Filename	Overview
extensions/similarweb/src/show-website-data.tsx	Main command; contains a misleading Toast (Style.Failure + title "Loaded website data") when snapshot storage fails — contradictory UX signals.
extensions/similarweb/src/api/similarweb.ts	Fetches from Similarweb's internal endpoint with spoofed browser headers; error handling is solid but the unofficial API surface is fragile and worth documenting.
extensions/similarweb/src/history.tsx	History list command; loads, renders, deletes, and clears snapshots cleanly with confirmation dialogs.
extensions/similarweb/src/lib/history.ts	LocalStorage persistence with dedup, size cap, and runtime type guard; well-structured.
extensions/similarweb/src/lib/format.ts	Data normalization and Markdown formatting helpers; heuristic percent formatting is reasonable given the unofficial API schema.
extensions/similarweb/src/lib/domain.ts	URL parsing and hostname validation; handles active-tab fallback and strips common subdomains correctly.
extensions/similarweb/package.json	Correct schema reference, categories, platforms, and dependency list; previously flagged issues resolved.

Prompt To Fix All With AI

This is a comment left during a code review.
Path: extensions/similarweb/src/show-website-data.tsx
Line: 62-66

Comment:
**Misleading failure toast when snapshot save fails**

When the API fetch succeeds but `saveSnapshot` throws, the toast uses `Toast.Style.Failure` (red) with the title `"Loaded website data"`. Users see a red failure indicator whose title implies the data load itself succeeded — contradictory signals that will cause confusion about what actually went wrong. The title should reflect the actual failure.

```suggestion
        await showToast({
          style: Toast.Style.Failure,
          title: "Could Not Save Snapshot",
          message: "The snapshot could not be stored in local history.",
        });
```

How can I resolve this? If you propose a fix, please make it concise.

_{Reviews (2): Last reviewed commit: "refactor(format): replace formatNumber w..." | Re-trigger Greptile}