Detailed realm observations

Find it in the repository

Collector source

core/signals/realms/details.ts

Export

measurementModule · Signal factory

Field definitions

core/definitions/realms/details.ts

Capture membership

Product capture · common/capture/product.ts

Page registration

app/signals/registry.ts

Field projection

core/results/measurement.ts

Execution contract

Signal

realms.details

Collector

realms.details

API / surface

core/signals/realms/details.ts

Timeout

2250 ms

Companion signals

None

Fixture inputs

Same-origin responder: /measure/frame

[
  {
    "key": "realms.details.responses",
    "inputs": {
      "contexts": {
        "contexts": [
          "top",
          "frame-fresh",
          "frame-reused",
          "worker-fresh",
          "worker-reused"
        ],
        "fields": [
          "userAgent",
          "platform",
          "defaults",
          "apiShape",
          "highEntropy"
        ],
        "hints": [
          "architecture",
          "bitness",
          "platformVersion"
        ],
        "hintDeadlineMs": 100,
        "protocol": "authenticated token + sequence + corpus revision"
      }
    },
    "controls": {}
  }
]

One collector runs per invocation. Results and JSON select this signal’s fields; any companions execute in the same collector.

Generated source manifest lists runtime files, fixture URLs and content digests for this build. The Source tab provides a copyable console sample.

Run and edit locally

From the repository root, start the Astro app, then open /signals/realms.details. Edit the collector source and reload the page to load its new build.

pnpm run dev:web

In a browser module served by this repository’s Vite graph:

import { createCollector } from "/core/collect"
import { measurementModule } from "/core/signals/realms/details"

const signal = measurementModule("/measure/frame")
const collector = createCollector()
const suite = { signals: [signal] }
const result = await collector.collect(suite)

Reuse the collector owner for repeated calls so collection can enforce cleanup. This returns the collector’s raw result; app/signals/projection.ts selects the retained fields shown on this page.

rg -n 'measurementModule' core app tests
pnpm run check
pnpm run test tests/unit/app/focused-projection.test.ts