diff --git a/tests/unit/testMunicipalityAllocatorConventions.unit.spec.ts b/tests/unit/testMunicipalityAllocatorConventions.unit.spec.ts
new file mode 100644
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+++ b/tests/unit/testMunicipalityAllocatorConventions.unit.spec.ts
@@ -0,0 +1,98 @@
+import { readdirSync, readFileSync } from 'node:fs'
+import { relative, resolve } from 'node:path'
+import { describe, expect, it } from 'vitest'
+
+import { municipalityCatalog } from '@/lib/municipalityCatalog'
+
+// Miss #73 (2026-07-31): int specs pinning seeded municipality slugs
+// (`getMunicipality('cairu')` et al.) and mutating them deadlocked
+// `municipality_rels` under the parallel suite (Postgres 40P01), and e2e specs
+// deep-linking `?municipio=cairu` raced the same row from two workers. The
+// allocator (`getMunicipality()` / `claimMunicipality()`, Postgres sequence)
+// hands out a unique row per claim; pinning is what breaks the contract.
+//
+// Rule 3 is the literal-regex sibling of the anchored-template guard (P3-C):
+// `new RegExp(\`…\`)` was hardened there, but `/Cairu/i` literals dodged it —
+// and catalog names are not prefix-unique (Conde/Condeúba, Barra ×4, Laje ×3).
+
+const repoRoot = process.cwd()
+const repoPath = (absolute: string) => relative(repoRoot, absolute)
+
+const walkFiles = (root: string, extensions: readonly string[]): string[] =>
+  readdirSync(root, { recursive: true, withFileTypes: true })
+    .filter((entry) => entry.isFile() && extensions.some((ext) => entry.name.endsWith(ext)))
+    .map((entry) => resolve(entry.parentPath, entry.name))
+
+const specFiles = [
+  ...walkFiles(resolve(repoRoot, 'tests/int'), ['.ts']),
+  ...walkFiles(resolve(repoRoot, 'tests/e2e'), ['.ts']),
+]
+
+/** `getMunicipality(…)` called with a non-empty argument (a pinned slug). */
+const FIXED_SLUG_CALL = /\bgetMunicipality\s*\(\s*[^)\s]/
+
+const MUTATION_PATTERN = new RegExp(
+  [
+    '\\b(?:assignMunicipalityAdvisors(?:Record)?|touchMunicipality|createLeadership|createVotePledge|createCampaignDemand|createMunicipalityUpdate|setStateDeputyMunicipalitiesBatchRecord)\\s*\\(',
+    'payload\\.update\\(\\s*\\{\\s*collection:\\s*[\'"]municipality[\'"]',
+  ].join('|'),
+)
+
+describe('municipality allocator discipline (miss #73)', () => {
+  it('never pins a fixed-slug municipality in a spec that mutates municipalities', () => {
+    const offenders: string[] = []
+
+    for (const file of specFiles) {
+      const source = readFileSync(file, 'utf8')
+      if (!FIXED_SLUG_CALL.test(source)) continue
+      if (!MUTATION_PATTERN.test(source)) continue
+      offenders.push(repoPath(file))
+    }
+
+    expect(
+      offenders,
+      'allocate with getMunicipality() (no slug) — read-only catalog lookups belong to getMunicipalityCatalogEntry',
+    ).toEqual([])
+  })
+
+  it('never deep-links a hardcoded municipality slug in e2e specs', () => {
+    const offenders: string[] = []
+
+    for (const file of walkFiles(resolve(repoRoot, 'tests/e2e'), ['.ts'])) {
+      const lines = readFileSync(file, 'utf8').split('\n')
+      for (const [index, line] of lines.entries()) {
+        if (/municipio=[a-z0-9-]/.test(line)) offenders.push(`${repoPath(file)}:${index + 1}`)
+      }
+    }
+
+    expect(offenders, 'interpolate claimMunicipality().slug into wizard deep links').toEqual([])
+  })
+
+  it('anchors e2e name regexes that mention a catalog municipality', () => {
+    const offenders: string[] = []
+    const nameLiteral = /name:\s*\/([^/\n]+)\/i?\b/g
+    const catalogNames = municipalityCatalog
+      .map((entry) => entry.name)
+      .filter((name) => name.length >= 4)
+
+    for (const file of walkFiles(resolve(repoRoot, 'tests/e2e'), ['.ts'])) {
+      const source = readFileSync(file, 'utf8')
+      nameLiteral.lastIndex = 0
+      let match: RegExpExecArray | null
+      while ((match = nameLiteral.exec(source)) !== null) {
+        const pattern = match[1]!
+        if (pattern.startsWith('^')) continue
+        const hit = catalogNames.find((name) => pattern.toLowerCase().includes(name.toLowerCase()))
+        if (hit) {
+          const line = source.slice(0, match.index).split('\n').length
+          offenders.push(`${repoPath(file)}:${line} (unanchored, matches "${hit}")`)
+        }
+      }
+    }
+
+    expect(
+      offenders,
+      'anchor with ^ (or locate by href) — catalog names are not prefix-unique',
+    ).toEqual([])
+  })
+})