diff --git a/.env.example b/.env.example
index f2b0d4c0..48a18e53 100644
--- a/.env.example
+++ b/.env.example
@@ -88,3 +88,10 @@ GOOGLE_CALENDAR_OAUTH_CLIENT_SECRET=
 # point it at a fake binary, and a host without ffmpeg can install it or set
 # this to a wrapper.
 FFMPEG_PATH=
+
+# C163/C190 — Portal da Transparência API key used by the city/dossiê report
+# scripts to fetch official emendas (`JORGE SOLLA`). Optional: without it the
+# official emendas block degrades to an explicit gap (never zero silently).
+# `pnpm worktree next` mirrors this key into the worktree `.env.local` when it
+# is set here, so report builds run with the same source as the main checkout.
+PORTAL_TRANSPARENCIA_API_KEY=
diff --git a/docs/changelog/2026-09-21-worktree-portal-transparencia-key.md b/docs/changelog/2026-09-21-worktree-portal-transparencia-key.md
new file mode 100644
index 00000000..db713786
--- /dev/null
+++ b/docs/changelog/2026-09-21-worktree-portal-transparencia-key.md
@@ -0,0 +1 @@
+**Worktree espelha `PORTAL_TRANSPARENCIA_API_KEY` no `.env.local` (2026-09-21):** o provisionamento por worktree copiava `PAYLOAD_SECRET`/`S3_*`/VAPID/Resend, mas não a chave do Portal da Transparência — então `node scripts/build-city-report.mjs` num worktree degradava as emendas oficiais para lacuna (`Chave da API do Portal da Transparência ausente.`) mesmo com a chave presente no checkout principal (visto no relatório de Miguel Calmon, C163). Correção no dono: a lista de envs espelhadas saiu do inline de `scripts/worktree.mjs` para `MIRRORED_WORKTREE_ENV_KEYS` + `mirroredEnvCopiedLines` em `scripts/lib/worktree-env.mjs` (função pura, unit-testada) e agora inclui `PORTAL_TRANSPARENCIA_API_KEY`; `.env.example` documenta a chave e o espelhamento. Sem schema, sem migration e sem mudança de URL pública — scripts + teste + doc.
diff --git a/scripts/lib/worktree-env.mjs b/scripts/lib/worktree-env.mjs
index 36af5b98..6dbe7610 100644
--- a/scripts/lib/worktree-env.mjs
+++ b/scripts/lib/worktree-env.mjs
@@ -77,6 +77,36 @@ export const s3EnvCopiedLines = (env) =>
     ? [...S3_WORKTREE_REQUIRED_KEYS, 'S3_REGION'].map((key) => `${key}=${env[key]}`)
     : []
 
+/**
+ * Optional env keys mirrored from the main checkout into a worktree's
+ * `.env.local` when present there (PAYLOAD_SECRET, DB and port come from the
+ * caller). This list is the single owner of "what `pnpm worktree next`
+ * copies": a key that exists in the main env but is missing here silently
+ * degrades every worktree — `PORTAL_TRANSPARENCIA_API_KEY` is the report
+ * scripts' case (C163/C190: without the mirror, official emendas became a
+ * gap in the worktree even though the main env had the key).
+ */
+const MIRRORED_WORKTREE_ENV_KEYS = [
+  'NEXT_PUBLIC_VAPID_PUBLIC_KEY',
+  'VAPID_PUBLIC_KEY',
+  'VAPID_PRIVATE_KEY',
+  'VAPID_SUBJECT',
+  'RESEND_API_KEY',
+  'CAMPAIGN_EMAIL_FROM',
+  'CAMPAIGN_EMAIL_FROM_NAME',
+  'PORTAL_TRANSPARENCIA_API_KEY',
+]
+
+/**
+ * `KEY=value` lines for the mirrored keys present in `env`, in list order.
+ * An absent/empty key copies nothing (same fail-open semantics as before).
+ *
+ * @param {Record<string, string | undefined>} env
+ * @returns {string[]}
+ */
+export const mirroredEnvCopiedLines = (env) =>
+  MIRRORED_WORKTREE_ENV_KEYS.filter((key) => env[key]).map((key) => `${key}=${env[key]}`)
+
 /**
  * Final environment for a branch. `takenSlots` = slots already claimed by
  * OTHER live worktrees; bumps +1 until free (bounded — live slot sets are
diff --git a/scripts/worktree.mjs b/scripts/worktree.mjs
index e415f24d..063855da 100644
--- a/scripts/worktree.mjs
+++ b/scripts/worktree.mjs
@@ -182,6 +182,7 @@ import {
   DEV_PORT_BASE,
   GENERATED_ENV_MARKER,
   isGeneratedDatabaseName,
+  mirroredEnvCopiedLines,
   s3EnvCopiedLines,
   worktreeEnvFileContents,
   worktreeEnvironment,
@@ -503,8 +504,6 @@ const provision = async ({ dir, branch, issue, env, skipMigrate, mainRoot, purpo
   const devUrl = `postgresql://teqo:teqo@localhost:5432/${devDatabase}`
   const testUrl = `postgresql://teqo:teqo@localhost:5432/${testDatabase}`
 
-  const copy = (key) => (mainEnv[key] ? [`${key}=${mainEnv[key]}`] : [])
-
   const issueLabel = issue ? ` · issue #${issue.number}` : ''
   const generatedBy = `gerado por pnpm worktree ${purpose}`
 
@@ -517,13 +516,9 @@ const provision = async ({ dir, branch, issue, env, skipMigrate, mainRoot, purpo
     copiedLines: [
       // Media storage (OPS52): all-or-nothing (see s3EnvCopiedLines).
       ...s3EnvCopiedLines(mainEnv),
-      ...copy('NEXT_PUBLIC_VAPID_PUBLIC_KEY'),
-      ...copy('VAPID_PUBLIC_KEY'),
-      ...copy('VAPID_PRIVATE_KEY'),
-      ...copy('VAPID_SUBJECT'),
-      ...copy('RESEND_API_KEY'),
-      ...copy('CAMPAIGN_EMAIL_FROM'),
-      ...copy('CAMPAIGN_EMAIL_FROM_NAME'),
+      // Optional secrets mirrored from the main env (single owner:
+      // MIRRORED_WORKTREE_ENV_KEYS in scripts/lib/worktree-env.mjs).
+      ...mirroredEnvCopiedLines(mainEnv),
     ],
   })
   writeFileSync(join(dir, '.env.local'), devLines.join('\n'))
diff --git a/tests/unit/worktree.unit.spec.ts b/tests/unit/worktree.unit.spec.ts
index bba35bcf..f0c6d77f 100644
--- a/tests/unit/worktree.unit.spec.ts
+++ b/tests/unit/worktree.unit.spec.ts
@@ -8,6 +8,7 @@ import {
   GENERATED_ENV_MARKER,
   hashSlotOf,
   isGeneratedDatabaseName,
+  mirroredEnvCopiedLines,
   numericSlotOfCode,
   s3EnvCopiedLines,
   testDatabaseForSlot,
@@ -886,6 +887,33 @@ describe('s3EnvCopiedLines (OPS52 media storage, all-or-nothing)', () => {
   })
 })
 
+describe('mirroredEnvCopiedLines (optional envs mirrored into the worktree)', () => {
+  it('copies PORTAL_TRANSPARENCIA_API_KEY from the main env (C163/C190 reports)', () => {
+    expect(mirroredEnvCopiedLines({ PORTAL_TRANSPARENCIA_API_KEY: 'eb32-key' })).toEqual([
+      'PORTAL_TRANSPARENCIA_API_KEY=eb32-key',
+    ])
+  })
+
+  it('copies every mirrored key present, in a stable order, skipping absent ones', () => {
+    expect(
+      mirroredEnvCopiedLines({
+        RESEND_API_KEY: 're_1',
+        VAPID_PRIVATE_KEY: 'priv',
+        PORTAL_TRANSPARENCIA_API_KEY: 'eb32-key',
+      }),
+    ).toEqual([
+      'VAPID_PRIVATE_KEY=priv',
+      'RESEND_API_KEY=re_1',
+      'PORTAL_TRANSPARENCIA_API_KEY=eb32-key',
+    ])
+  })
+
+  it('copies nothing when no mirrored key is set', () => {
+    expect(mirroredEnvCopiedLines({ DATABASE_URL: 'x' })).toEqual([])
+    expect(mirroredEnvCopiedLines({ PORTAL_TRANSPARENCIA_API_KEY: '' })).toEqual([])
+  })
+})
+
 describe('worktreeEnvFileContents (dev/test env parity)', () => {
   const env = worktreeEnvironment({ branch: 'C15-fullcalendar', code: 'C15' })
   const lines = worktreeEnvFileContents({