add js-libp2p devtools blog post (#716)

* feat: add dev tools blog post

* edits

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Co-authored-by: Daniel N <2color@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

src/_blog/2025-js-libp2p-devtools.md

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+---
+date: 2025-07-25
+permalink: /2025-js-libp2p-helia-devtools/
+title: 'Debugging superpowers with the new js-libp2p developer tools'
+description: 'Discover the new js-libp2p developer tools from Shipyard that provide real-time debugging capabilities for js-libp2p and Helia nodes in both browsers and Node.js.'
+author: Daniel Norman
+header_image: /dev-tools.jpg
+tags:
+  - ipfs
+  - devtools
+  - js-libp2p
+  - browsers
+  - node.js
+  - extension
+  - Interplanetary Shipyard
+---
+
+[Interplanetary Shipyard](https://ipshipyard.com/) is thrilled to share [js-libp2p inspector](https://github.com/ipshipyard/js-libp2p-inspector/), the new developer tools for debugging and inspecting js-libp2p and Helia, for use both in browsers and Node.js.
+
+Debugging is an essential part of software development, and having the right tools can make all the difference. The new developer tools provide a user-friendly interface to inspect your libp2p nodes in real-time, tightening the feedback loop and making it easier to diagnose issues.
+
+## Inspecting and monitoring throughout the development cycle
+
+These new developer tools expand the existing set of metrics implementations for js-libp2p, which include [metrics-prometheus](https://github.com/libp2p/js-libp2p/tree/main/packages/metrics-prometheus) and [metrics-opentelemetry](https://github.com/libp2p/js-libp2p/tree/main/packages/metrics-opentelemetry).
+
+While Prometheus and OpenTelemetry are for monitoring and tracing in production (though not exclusively), the inspector is intended for use during development. Together, these tools provide a comprehensive solution for monitoring and debugging js-libp2p and Helia nodes throughout the development cycle.
+
+## Getting started
+
+To inspect a js-libp2p or Helia node, you need to pass the metrics implementation from the [`@ipshipyard/libp2p-inspector-metrics`](https://www.npmjs.com/package/@ipshipyard/libp2p-inspector-metrics) package to your js-libp2p or Helia factory:
+
+### js-libp2p example
+
+```js
+import { createLibp2p } from 'libp2p'
+import { inspectorMetrics } from '@ipshipyard/libp2p-inspector-metrics'
+
+const node = await createLibp2p({
+  metrics: inspectorMetrics()
+})
+```
+
+### Helia example
+
+```js
+import { createHelia } from 'helia'
+import { inspectorMetrics } from '@ipshipyard/libp2p-inspector-metrics'
+
+const node = await createHelia({
+  libp2p: {
+    metrics: inspectorMetrics()
+  },
+})
+```
+
+Once you have your node running with the inspector metrics enabled, you can start inspecting it using the browser extension or the Electron app.
+
+The following video walks through setup and usage with both Node.js and browser environments:
+
+@[youtube](AKNGtn7EZxI)
+
+## Try the new developer tools
+
+The new developer tools consist of several npm packages that work together:
+
+- [`@ipshipyard/libp2p-devtools`:](https://github.com/ipshipyard/js-libp2p-inspector/tree/main/packages/libp2p-devtools) Browser DevTools extension to inspect a libp2p node running in a web page.
+- [`@ipshipyard/libp2p-inspector`:](https://github.com/ipshipyard/js-libp2p-inspector/tree/main/packages/libp2p-inspector) Electron based app to inspect a running libp2p node in Node.js.
+- [`@ipshipyard/libp2p-inspector-metrics`:](https://github.com/ipshipyard/js-libp2p-inspector/tree/main/packages/libp2p-inspector-metrics) Metrics implementation that instruments the libp2p node such that it can be inspected by the inspector or the browser extension. This package needs to be imported in your js-libp2p based application to enable inspection.
+- [`@ipshipyard/libp2p-inspector-ui`:](https://github.com/ipshipyard/js-libp2p-inspector/tree/main/packages/libp2p-inspector-ui) The user interface shared by both the Electron inspector and the browser extension.
+
+We encourage you to try out the new developer tools and provide feedback. You can find the source code on [GitHub](https://github.com/ipshipyard/js-libp2p-inspector).