diff --git a/docs/TESTING.md b/docs/TESTING.md
index fb1f0a93..81ec234b 100644
--- a/docs/TESTING.md
+++ b/docs/TESTING.md
@@ -12,6 +12,8 @@ CI (`.github/workflows/ci-pr.yml`) runs parallel jobs — lint (zero warnings),
 
 **Local e2e before push (same blast radius as PR CI):** `pnpm test:e2e:affected` — runs `e2e-affected.mjs` against `origin/stage`, migrates/seeds, then `pnpm test:e2e` with the selected specs (or the full suite on high-risk diffs). Forward extra Playwright args after `--` for a narrowed repro. Opt into production mode (after fixing the known municipalities-list prod client bug) with `E2E_PROD=1 pnpm test:e2e:affected`.
 
+**Navigation discipline in e2e (miss #54, 2026-07-30):** `page.goto` is for cold loads and URL contracts (deep links, redirects, legacy params); when the scenario is _continuity inside the authenticated shell_ — especially after a heavy list route — navigate in-shell instead (sidebar links, buttons, form submits), the way the user does. Never fire two `page.goto` back-to-back with nothing settling the first navigation (an `await expect(...)`, `waitForURL`, or interaction): the second aborts the first's in-flight RSC fetch (`net::ERR_ABORTED`, measured in `campaignSavedFilters`). The `e2eNavigationConventions` unit guard fails the build on unsettled goto pairs. Two sibling rules of the same family: wait for **interactive state** before clicking dynamic controls — `toBeVisible` proves SSR paint, not hydration (pre-hydration clicks no-op silently; `checkRadixWhenHydrated` is the precedent, P3-C class) — and gate WebAuthn ceremonies on `expectCampaignBiometricsReady` before the island's one-shot probe runs (miss #53). **Dev-mode caveat:** `campaignLeaderships`' chip-cell spec currently fails deterministically under `pnpm dev` (suggestion/commit step; prod build green — run it with `E2E_PROD=1` locally; ledgered in TECH-DEBT).
+
 ## Minimal test database (`pnpm db:seed:minimal`)
 
 The integration suite and any agent/Cloud environment boot from a **minimal synthetic database**: schema from `pnpm migrate` (which seeds the 435-município catalog) plus `pnpm db:seed:minimal` ([`scripts/seed-minimal.mjs`](../scripts/seed-minimal.mjs)), an idempotent upsert of the rows the app refuses to run without:
diff --git a/tests/unit/e2eNavigationConventions.unit.spec.ts b/tests/unit/e2eNavigationConventions.unit.spec.ts
new file mode 100644
index 00000000..07182184
--- /dev/null
+++ b/tests/unit/e2eNavigationConventions.unit.spec.ts
@@ -0,0 +1,86 @@
+import { readdirSync, readFileSync } from 'node:fs'
+import { relative, resolve } from 'node:path'
+import { describe, expect, it } from 'vitest'
+
+// Miss #54 (2026-07-30): a `page.goto` fired while the previous heavy RSC
+// navigation was still in flight aborted with `net::ERR_ABORTED`
+// (campaignSavedFilters, prod build). `goto` stays legal for cold loads and
+// URL contracts — the anti-pattern is two gotos with NOTHING between them
+// that settles the first navigation. A settle is any awaited interaction
+// with the landed page (assertion, fill, click, reload, login…): it proves
+// the previous route rendered before the next one starts.
+//
+// Miss #53 (2026-07-30): the biometrics probe is one-shot per island mount,
+// so a ceremony that starts before the CDP virtual authenticator answers
+// never sees the enrollment UI. Specs registering a virtual authenticator
+// must gate on `expectCampaignBiometricsReady` first.
+
+const e2eRoot = resolve(process.cwd(), 'tests/e2e')
+
+const specFiles = readdirSync(e2eRoot, { recursive: true, withFileTypes: true })
+  .filter((entry) => entry.isFile() && entry.name.endsWith('.e2e.spec.ts'))
+  .map((entry) => resolve(entry.parentPath, entry.name))
+
+const SETTLE_TOKENS = [
+  'await expect(',
+  'waitForURL(',
+  '.click(',
+  '.check(',
+  '.fill(',
+  '.press(',
+  '.hover(',
+  'clearCookies(',
+  '.reload(',
+  'campaign.login(',
+  '.catch(',
+  'await request.',
+  'checkRadixWhenHydrated(',
+  'expectCampaignBiometricsReady(',
+] as const
+
+describe('e2e navigation discipline (miss #54)', () => {
+  it('never fires two page.goto without settling the first navigation', () => {
+    const offenders: string[] = []
+
+    for (const file of specFiles) {
+      const lines = readFileSync(file, 'utf8').split('\n')
+      let lastGoto: number | null = null
+      let settledSince = false
+
+      for (const [index, line] of lines.entries()) {
+        if (SETTLE_TOKENS.some((token) => line.includes(token))) settledSince = true
+        if (!line.includes('page.goto(')) continue
+        if (lastGoto !== null && !settledSince) {
+          offenders.push(
+            `${relative(process.cwd(), file)}:${index + 1} (goto at ${lastGoto + 1} unsettled)`,
+          )
+        }
+        lastGoto = index
+        settledSince = false
+      }
+    }
+
+    expect(
+      offenders,
+      'settle the first navigation (await expect/waitForURL/click…) before the next page.goto, or navigate in-shell (miss #54)',
+    ).toEqual([])
+  })
+})
+
+describe('e2e WebAuthn virtual authenticator (miss #53)', () => {
+  it('gates every virtual-authenticator spec on expectCampaignBiometricsReady', () => {
+    const offenders: string[] = []
+
+    for (const file of specFiles) {
+      const source = readFileSync(file, 'utf8')
+      if (!source.includes('WebAuthn.addVirtualAuthenticator')) continue
+      if (source.includes('expectCampaignBiometricsReady(')) continue
+      offenders.push(relative(process.cwd(), file))
+    }
+
+    expect(
+      offenders,
+      'call expectCampaignBiometricsReady(page) before the surface whose island probes the authenticator',
+    ).toEqual([])
+  })
+})