diff --git a/.github/workflows/plan-issue-ready-on-main-merge.yml b/.github/workflows/plan-issue-ready-on-main-merge.yml
index 64728905..d7d8d8a7 100644
--- a/.github/workflows/plan-issue-ready-on-main-merge.yml
+++ b/.github/workflows/plan-issue-ready-on-main-merge.yml
@@ -3,11 +3,13 @@
 # to `ready`. Idempotent with `pnpm agent:ready` (agent happy path).
 #
 # Does NOT run on open PRs — only after merge — so the claim race stays closed.
+# Job is gated on Related # in the body so non-plan merges skip checkout/Node.
 name: Promote plan-issue Related on main merge
 
 on:
   pull_request:
     types: [closed]
+    branches: [main]
 
 permissions:
   issues: write
@@ -16,12 +18,19 @@ permissions:
 
 jobs:
   plan-issue-ready:
-    if: github.event.pull_request.base.ref == 'main' && github.event.pull_request.merged == true
+    if: >-
+      github.event.pull_request.merged == true &&
+      (
+        contains(github.event.pull_request.body, 'Related #') ||
+        contains(github.event.pull_request.body, 'related #') ||
+        contains(github.event.pull_request.body, 'RELATED #')
+      )
     runs-on: ubuntu-latest
     timeout-minutes: 5
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       PR_NUMBER: ${{ github.event.pull_request.number }}
+      PR_BODY: ${{ github.event.pull_request.body }}
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v5
diff --git a/docs/plans/plan-issue-promote-dual-impl.md b/docs/plans/plan-issue-promote-dual-impl.md
index f5334346..6520e547 100644
--- a/docs/plans/plan-issue-promote-dual-impl.md
+++ b/docs/plans/plan-issue-promote-dual-impl.md
@@ -69,8 +69,10 @@ flowchart LR
 - Promover no `ci-pr` / checks do PR aberto.
 - Label nova `needs:plan`.
 - Matar o promote do agente (`agent:ready`).
-- Hoist de `HUMAN_GATE_LABELS` / `issueHasPlanLink` para módulo neutro (ainda 2–3 call sites; defer).
-- Batch soft-fail em `agent:ready` CLI.
+- Hoist `HUMAN_GATE_LABELS` / `issueHasPlanLink` / lista ativa-ou-terminal para módulo neutro — defer até 3º consumidor fora do lifecycle.
+- Extrair executor compartilhado promote-one-issue (`agent:ready` × Action) — defer até 3º call site ou política de falha convergente.
+- Unificar workflows de merge (`issue-done` + plan-ready) num único runner — defer; acoplamento rejeitado na decisão B.
+- Comentário duplicado se agente e Action promovem na mesma janela — benigno; labels idempotentes.
 
 ## Riscos e mitigação
 
diff --git a/scripts/agent-promote-related-on-merge.mjs b/scripts/agent-promote-related-on-merge.mjs
index 63c8e950..65c98913 100644
--- a/scripts/agent-promote-related-on-merge.mjs
+++ b/scripts/agent-promote-related-on-merge.mjs
@@ -2,19 +2,20 @@
  * OPS18 safety net — on PR merge to `main`, promote plan-issue Issues cited as
  * `Related #N` from `blocked` → `ready` when they are still awaiting a plan.
  *
- * Soft-skip (never fail the workflow) when an issue is already ready, product-
- * blocked without a plan link, gated by needs:*, or otherwise ineligible.
- * Idempotent with `pnpm agent:ready`.
+ * Soft-skips ineligible Issues (already ready, product-blocked without a plan
+ * link, needs:*, etc.). Flip/comment failures for one Issue are logged and do
+ * not abort siblings. Idempotent with `pnpm agent:ready`.
  *
  *   node scripts/agent-promote-related-on-merge.mjs --pr 123
+ *   PR_BODY='Related #296' node scripts/agent-promote-related-on-merge.mjs --pr 123
  *
- * Env: GH_TOKEN (Actions), GITHUB_REPOSITORY (optional — gh uses default remote).
+ * Env: GH_TOKEN (Actions); optional PR_BODY skips `gh pr view` (Actions event).
  */
 
-import { dieAgent, gh, ghJson, labelNames, parseArgs, setLabels } from './lib/agent-github.mjs'
+import { dieAgent, gh, ghJson, parseArgs, setLabels } from './lib/agent-github.mjs'
 import { canPromotePlanIssue, parseRelatedIssueNumbers } from './lib/agent-plan-lifecycle.mjs'
 
-const die = dieAgent('promote-related-on-merge')
+const die = dieAgent('promote-related')
 const { flags } = parseArgs(process.argv.slice(2), new Set(['pr']))
 
 if (!flags.pr || !/^\d+$/.test(String(flags.pr))) {
@@ -22,8 +23,12 @@ if (!flags.pr || !/^\d+$/.test(String(flags.pr))) {
 }
 
 const prNumber = Number(flags.pr)
-const pr = ghJson(['pr', 'view', String(prNumber), '--json', 'body,number,url'])
-const numbers = parseRelatedIssueNumbers(pr.body)
+const bodyFromEnv = process.env.PR_BODY
+const body =
+  typeof bodyFromEnv === 'string'
+    ? bodyFromEnv
+    : ghJson(['pr', 'view', String(prNumber), '--json', 'body']).body
+const numbers = parseRelatedIssueNumbers(body)
 
 if (numbers.length === 0) {
   console.log(`[agent:promote-related] PR #${prNumber}: no Related #N — nothing to do`)
@@ -55,7 +60,7 @@ for (const number of numbers) {
 
   const verdict = canPromotePlanIssue(issue)
   if (!verdict.ok) {
-    if (verdict.reason === 'not-blocked' && labelNames(issue).includes('ready')) {
+    if (verdict.reason === 'already-ready') {
       console.log(`[agent:promote-related] #${number}: already ready — skip`)
       continue
     }
@@ -63,13 +68,21 @@ for (const number of numbers) {
     continue
   }
 
-  setLabels(number, { add: ['ready'], remove: ['blocked'] })
-  gh([
-    'issue',
-    'comment',
-    String(number),
-    '--body',
-    `Promovido a \`ready\` via Action OPS18 — plano de intenção em \`main\` (PR #${prNumber} com \`Related #${number}\`).`,
-  ])
-  console.log(`[agent:promote-related] #${number}: blocked → ready`)
+  try {
+    setLabels(number, { add: ['ready'], remove: ['blocked'] })
+    gh([
+      'issue',
+      'comment',
+      String(number),
+      '--body',
+      `Promovido a \`ready\` via Action OPS18 — plano de intenção em \`main\` (PR #${prNumber} com \`Related #${number}\`).`,
+    ])
+    console.log(`[agent:promote-related] #${number}: blocked → ready`)
+  } catch (error) {
+    console.log(
+      `[agent:promote-related] #${number}: promote failed (${
+        error instanceof Error ? error.message : String(error)
+      })`,
+    )
+  }
 }
diff --git a/scripts/agent-ready.mjs b/scripts/agent-ready.mjs
index 7640b23f..210b5156 100644
--- a/scripts/agent-ready.mjs
+++ b/scripts/agent-ready.mjs
@@ -11,7 +11,7 @@
  * link stay for human triage.
  */
 
-import { dieAgent, gh, ghJson, labelNames, parseArgs, setLabels } from './lib/agent-github.mjs'
+import { dieAgent, gh, ghJson, parseArgs, setLabels } from './lib/agent-github.mjs'
 import { canPromotePlanIssue } from './lib/agent-plan-lifecycle.mjs'
 
 const die = dieAgent('ready')
@@ -42,7 +42,7 @@ for (const number of numbers) {
   ])
   const verdict = canPromotePlanIssue(issue)
   if (!verdict.ok) {
-    if (verdict.reason === 'not-blocked' && labelNames(issue).includes('ready')) {
+    if (verdict.reason === 'already-ready') {
       console.log(`[agent:ready] #${number} already ready — skip`)
       continue
     }
diff --git a/scripts/lib/agent-plan-lifecycle.mjs b/scripts/lib/agent-plan-lifecycle.mjs
index 69e2d056..9ae91f4f 100644
--- a/scripts/lib/agent-plan-lifecycle.mjs
+++ b/scripts/lib/agent-plan-lifecycle.mjs
@@ -23,12 +23,17 @@ export const resolveRegisterStateLabel = ({ hasPlan, explicitBlocked = false })
 
 const TERMINAL_OR_ACTIVE = ['in-progress', 'done', 'in-prod']
 
-/** `Related #N` only — never closing keywords (those are owned by issue-done). */
-const RELATED_ISSUE_RE = /\brelated\s+#(\d+)\b/gi
+/**
+ * Whole-word `Related #N` only (case-insensitive). Does not match
+ * closing keywords (`Closes`/`Fixes`/`Resolves`) and rejects hyphenated
+ * compounds like `non-related #5`.
+ */
+const RELATED_ISSUE_RE = /(?<![\w-])related\s+#(\d+)\b/gi
 
 /**
  * Issue numbers cited as `Related #N` in a PR body (plans-only contract).
- * Deduped, stable first-seen order. Ignores Closes/Fixes/Resolves.
+ * Deduped, stable first-seen order. Only matches the Related keyword —
+ * closing keywords are owned by issue-done and never appear here.
  *
  * @param {string | null | undefined} body
  * @returns {number[]}
@@ -56,6 +61,9 @@ export const parseRelatedIssueNumbers = (body) => {
 export const canPromotePlanIssue = (issue) => {
   if ((issue?.state ?? 'OPEN') !== 'OPEN') return { ok: false, reason: 'not-open' }
   const labels = labelNames(issue ?? { labels: [] })
+  if (labels.includes('ready') && !labels.includes('blocked')) {
+    return { ok: false, reason: 'already-ready' }
+  }
   if (!labels.includes('blocked')) return { ok: false, reason: 'not-blocked' }
   if (TERMINAL_OR_ACTIVE.some((label) => labels.includes(label))) {
     return { ok: false, reason: 'state-label' }
diff --git a/tests/unit/agentPlanLifecycle.unit.spec.ts b/tests/unit/agentPlanLifecycle.unit.spec.ts
index a674f6b9..cf6b9fe1 100644
--- a/tests/unit/agentPlanLifecycle.unit.spec.ts
+++ b/tests/unit/agentPlanLifecycle.unit.spec.ts
@@ -56,12 +56,19 @@ describe('canPromotePlanIssue', () => {
   })
 
   it('rejects issues that are not blocked', () => {
-    expect(canPromotePlanIssue(issue({ labels: [{ name: 'ready' }] }))).toEqual({
+    expect(canPromotePlanIssue(issue({ labels: [{ name: 'prio:P2' }] }))).toEqual({
       ok: false,
       reason: 'not-blocked',
     })
   })
 
+  it('reports already-ready when ready without blocked (idempotent skip)', () => {
+    expect(canPromotePlanIssue(issue({ labels: [{ name: 'ready' }] }))).toEqual({
+      ok: false,
+      reason: 'already-ready',
+    })
+  })
+
   it.each(['in-progress', 'done', 'in-prod'])(
     'rejects when %s coexists with blocked',
     (stateLabel) => {
@@ -96,12 +103,20 @@ describe('parseRelatedIssueNumbers', () => {
     ])
   })
 
-  it('ignores closing keywords (Closes/Fixes/Resolves)', () => {
+  it('does not match closing keywords (Closes/Fixes/Resolves)', () => {
     expect(parseRelatedIssueNumbers('Closes #10\nFixes #11\nResolves #12\nRelated #296')).toEqual([
       296,
     ])
   })
 
+  it('rejects hyphenated compounds and Related without whitespace', () => {
+    expect(parseRelatedIssueNumbers('non-related #5 and Related#296')).toEqual([])
+  })
+
+  it('accepts markdown list form', () => {
+    expect(parseRelatedIssueNumbers('- Related #296\n- Related #301')).toEqual([296, 301])
+  })
+
   it('returns empty for missing/blank bodies', () => {
     expect(parseRelatedIssueNumbers(undefined)).toEqual([])
     expect(parseRelatedIssueNumbers('')).toEqual([])