diff --git a/docs/plugin-roadmap-2026-07.md b/docs/plugin-roadmap-2026-07.md
index 495602d..b1d4ee8 100644
--- a/docs/plugin-roadmap-2026-07.md
+++ b/docs/plugin-roadmap-2026-07.md
@@ -163,10 +163,22 @@ Maskineriet er bygget (krav 1+2+3 + per-kategori-hint); målingen er aldri kjør
 
 **Verifisering:** `test-relabel-dato` 10/10 (inkl. disk-integritet: committed-state + at de 5 dual-filene forblir urørt); git diff **+16/−16** på 16 filer (hver endret linje = label-swap, verifisert begge retninger); revers-substitusjon byte-eksakt; idempotent re-run = 0; verdier bevart (`2026-04`, `5. februar 2026`, …); ground truth `Missing English Last updated (non-advisor) 20→4`, gjenstående `**Dato:**` = 13 (5 dual + 8 body); R22-Enhet-1-tool fortsatt no-op (51/51 already-english); suite **792/792** exit 0.
 
+### Enhet 3 — Status-backfill + ai-act dual-header-dedup ✅ 2026-07-07
+
+To operasjoner, én økt (⊥ R7), begge metadata-normalisering (verdi ALDRI fabrikkert).
+
+**Premiss-korreksjon (ground truth 2026-07-07, `audit-corpus-headers.mjs` + worklist):** roadmap sa «27 none + 4 ai-act». Målt: **29** filer mangler bold `**Status:**` = **25 rene «none»** (ingen Status-markør) + **4 ai-act** (plain `Status: GA`). De «27» inkluderte 2 for mye: **2 filer** (`monitoring-observability/custom-dashboards-ai-operations`, `ai-security-engineering/zero-trust-ai-services`) bærer bold `**Status:**` KUN forbi byte 500 → present for full-fil-audit, men **usynlig for 500-byte header-parseren**. De er IKKE manglende felt — de er en egen **header-slanking-residual** (§8-register), utenfor Enhet 3.
+
+**Op A — Status-backfill 25 rene none-filer.** Utvidet den ene Status-mekanismen `backfill-status.mjs` (MANIFEST 14→**39**; samme `statusForFile` + `insertMetaField` + hard per-fil-invariant, idempotent skip på de 14 R21-gjorte). Alle 25 → `**Status:** Established Practice` (ingen matcher `template|matrix|benchmarks|register`-token). Diff **+25/−0**, hver = én `**Status:**`-linje i bold-meta-run innenfor 500B.
+
+**Op B — ai-act dual-header-dedup (4 filer).** Ny driver `dedup-plain-header.mjs` + 2 nye rene primitiver i `transform.mjs`: `boldifyPlainField()` (plain `<label>: <verdi>`→`**<label>:** <verdi>`, verdi bevart byte-eksakt, header-scoped, idempotent) og `dropRedundantPlainField()` (sletter plain-linje KUN når bold `**<label>:**` med **identisk verdi** beviser redundans; **kaster** ved verdi-avvik eller manglende bold — aldri auto-slett). Per fil: plain `Last updated:` + `Status: GA` → bold (verdi bevart: `2026-06-18`/`2026-02`, `GA`), redundant plain `Category:` fjernet (bold Category fra R20 bevart). Hard per-fil-invariant: net −1 linje, begge felt bold m/ bevart verdi, ingen plain-header-felt igjen, body byte-identisk. Diff **−12/+8** på 4 filer (net −1/fil).
+
+**Verifisering:** `test-backfill-status` 8/8 + `test-dedup-plain-header` 13/13; audit **Missing Status 29→0**, **Missing English Last updated 4→0**; git diff skills = 29 filer +33/−12 (25 Status-insert + 4 dedup), alle tilførte linjer verifisert (kun `**Status:**` + de 8 bold-swappene), diff-kontekst inspisert per fil ([[dual-header-dialect-blindness]]); begge drivere idempotent (re-run 0 writes); suite **806/806** exit 0. `none=8`-dialekt uendret (Enhet 4-scope).
+
 **Gjenstående decision-(b)-enheter (egne økter, ⊥ R7):**
-- **Enhet 3:** Status-backfill 27 none-filer (`statusForFile`, R21-mønster) + 4 `ai-act-*` plain-blokk-dedup (bold-ify + fjern redundant plain-linjer).
-- **Enhet 3b (NY — dedup):** 5 dual-label-filer med `**Dato:**` (opprettelse) + `**Last updated:**` (endring). Beslutning kreves: behold `**Dato:**` som eget «opprettet»-felt (relabel til `**Created:**`?) vs. fjern som redundant. Fabrikk/slett ALDRI uten operatør-beslutning. Filer: `feedback-loops-continuous-improvement`, `genaiops-llm-specific-practices`, `mlops-security-access-control`, `model-deployment-strategies-azure`, `prompt-flow-production-deployment` (alle mlops-genaiops).
+- **Enhet 3b (dedup):** 5 dual-label-filer med `**Dato:**` (opprettelse) + `**Last updated:**` (endring). Beslutning kreves: behold `**Dato:**` som eget «opprettet»-felt (relabel til `**Created:**`?) vs. fjern som redundant. **Målt 2026-07-07:** 4 av 5 har distinkt opprettet≠endret (`**Dato:**` bærer ekte info); 1 (`mlops-security-access-control`) har identiske datoer (`**Dato:**` redundant). Fabrikk/slett ALDRI uten operatør-beslutning. Filer: `feedback-loops-continuous-improvement`, `genaiops-llm-specific-practices`, `mlops-security-access-control`, `model-deployment-strategies-azure`, `prompt-flow-production-deployment` (alle mlops-genaiops).
 - **Enhet 4:** 1 datoløs (`decision-trees.md`, git-«innholds-commit»-heuristikk, ALDRI «i dag») + verifiser de 8 «category-none» = ekte gap vs. vindus-artefakt.
+- **Residual (header-slanking, §8-register):** 2 filer med bold `**Status:**` forbi byte 500 (`custom-dashboards-ai-operations`, `zero-trust-ai-services`) → header-parseren ser dem ikke. Ikke missing-felt; krever header-omstokking (distinkt, risikofylt operasjon), ikke insert. Lukkes egen økt.
 
 ## Parkert (krever eget operatør-go)
 
diff --git a/scripts/kb-update/backfill-status.mjs b/scripts/kb-update/backfill-status.mjs
index 7f56f6c..53e00c3 100644
--- a/scripts/kb-update/backfill-status.mjs
+++ b/scripts/kb-update/backfill-status.mjs
@@ -1,22 +1,26 @@
 #!/usr/bin/env node
-// Backfill **Status:** on the 14 English-dialect advisor reference files that carry NO
-// status label (R21 — base-field pre-pass del 2, ⊥ R7).
+// Backfill **Status:** on English-dialect reference files that carry NO status label
+// (R21 + Enhet 3 — base-field pre-pass, ⊥ R7). Single mechanism for the whole corpus.
 //
-// Ground truth 2026-07-06 (premiss-verified): of the not-due (146) corpus, 21 files lack a
-// bold **Status:**. Of those, 3 are Norwegian-dialect (an English Status would mix dialects)
-// and 4 (ms-ai-governance/responsible-ai/ai-act-*) carry a PLAIN-TEXT `Status: GA` in a second
-// dual-header block that the bold-only regex does not see — inserting a bold **Status:** there
-// duplicates/contradicts it. All 7 (3 + 4) are DEFERRED to the decision-b dialect/dual-header
-// residual (the same plain block is why R20 duplicated **Category:** on those 4). The clean
-// remainder is 14 advisor/architecture files. All 26 not-due Last-updated gaps are also deferred
-// (21 already carry a Norwegian date → relabel; 5 are git-unreliable post-R20-churn). This
-// applier writes ONLY those 14 Status lines — never a date, never into a Norwegian/dual-header file.
+// Scope (ground-truth measured 2026-07-06 → extended 2026-07-07):
+//   R21     — 14 advisor/architecture files (the clean not-due remainder; 3 Norwegian-dialect
+//             and 4 dual-header ai-act-* files were held back — see below).
+//   Enhet 3 — +25 non-advisor files whose header carries no **Status:** at all (audit dialect
+//             'none' for Status). Measured 25 — NOT the roadmap's "27": 2 of that count are
+//             files whose bold **Status:** sits PAST byte 500 (present, but invisible to the
+//             500-byte header parser), a separate header-slanking residual, not a missing field.
+//   Still OUT — the 4 ms-ai-governance/responsible-ai/ai-act-* files carry a PLAIN-TEXT
+//             `Status: GA` in a dual-header block. Inserting a derived bold **Status:** there
+//             would duplicate/contradict the authored value; they are handled by the plain→bold
+//             dedup driver (dedup-plain-header.mjs), which PRESERVES `GA` rather than deriving.
 //
-// Value rule (operator-approved vocabulary, 2026-07-06): statusForFile() — a filename-token
-// map within {Reference, Established Practice}. Reuses the tested insertMetaField primitive,
-// with a hard per-file invariant asserted BEFORE any write (exactly one line inserted, it is
-// the Status line, body byte-identical). Idempotent: a file already carrying **Status:** is
-// skipped, so a re-run is a no-op. Aborts and writes nothing on any drift or invariant breach.
+// This applier writes ONLY a derived bold **Status:** line — never a date, never into a
+// dual-header ai-act file. Value rule (operator-approved vocabulary): statusForFile() — a
+// filename-token map within {Reference, Established Practice}. Reuses the tested insertMetaField
+// primitive, with a hard per-file invariant asserted BEFORE any write (exactly one line
+// inserted, it is the Status line, body byte-identical). Idempotent: a file already carrying
+// **Status:** in its header window is skipped, so a re-run — including the 14 R21 files already
+// applied — is a no-op. Aborts and writes nothing on any drift or invariant breach.
 //
 // Usage:  node scripts/kb-update/backfill-status.mjs [--dry]
 import { readFileSync, writeFileSync, existsSync, realpathSync } from 'node:fs';
@@ -46,10 +50,12 @@ export function statusForFile(relOrBase) {
   return /(?:template|matrix|benchmarks|register)/i.test(base) ? 'Reference' : 'Established Practice';
 }
 
-// Frozen manifest — the 18 scope-confirmed targets (not-due ∩ missing-**Status:** ∩
-// English-dialect), verified against ground truth 2026-07-06. Each value is derived by
-// statusForFile() and re-asserted below, so the manifest can never drift from the rule.
+// Frozen manifest — the 39 scope-confirmed targets (missing-**Status:** ∩ English-dialect ∩
+// not a dual-header ai-act file), verified against ground truth (R21: 14 advisor 2026-07-06;
+// Enhet 3: +25 non-advisor 2026-07-07). Each value is derived by statusForFile() and re-asserted
+// below, so the manifest can never drift from the rule.
 const TARGET_PATHS = [
+  // R21 — 14 advisor/architecture files (already applied; re-run skips them idempotently).
   'skills/ms-ai-advisor/references/architecture/adr-template.md',
   'skills/ms-ai-advisor/references/architecture/ai-utredning-template.md',
   'skills/ms-ai-advisor/references/architecture/alternativanalyse-methodology.md',
@@ -64,6 +70,32 @@ const TARGET_PATHS = [
   'skills/ms-ai-advisor/references/architecture/regional-availability-verification.md',
   'skills/ms-ai-advisor/references/architecture/security.md',
   'skills/ms-ai-advisor/references/architecture/source-traceability-assumption-register.md',
+  // Enhet 3 — 25 non-advisor files with no **Status:** at all (all → Established Practice).
+  'skills/ms-ai-engineering/references/mlops-genaiops/cost-optimization-mlops-pipelines.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/feedback-loops-continuous-improvement.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/genaiops-llm-specific-practices.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/governance-audit-ml-operations.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/inferencing-optimization-caching.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/infrastructure-as-code-mlops.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/llm-evaluation-production.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/mlops-security-access-control.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/mlops-teams-collaboration-tools.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/model-deployment-strategies-azure.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/monitoring-observability-ml-systems.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/prompt-flow-production-deployment.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/responsible-ai-mlops-integration.md',
+  'skills/ms-ai-governance/references/monitoring-observability/anomaly-detection-ai-systems.md',
+  'skills/ms-ai-governance/references/monitoring-observability/azure-monitor-setup-ai-workloads.md',
+  'skills/ms-ai-governance/references/monitoring-observability/log-analytics-kql-ai-queries.md',
+  'skills/ms-ai-governance/references/monitoring-observability/token-usage-tracking-attribution.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-center-of-excellence-setup.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-governance-structure-framework.md',
+  'skills/ms-ai-governance/references/responsible-ai/red-teaming-ai-models.md',
+  'skills/ms-ai-security/references/ai-security-engineering/ai-red-team-operations-practical.md',
+  'skills/ms-ai-security/references/ai-security-engineering/data-leakage-prevention-ai.md',
+  'skills/ms-ai-security/references/ai-security-engineering/secure-model-deployment-hardening.md',
+  'skills/ms-ai-security/references/ai-security-engineering/security-copilot-integration.md',
+  'skills/ms-ai-security/references/ai-security-engineering/supply-chain-security-ai-models.md',
 ];
 export const MANIFEST = TARGET_PATHS.map((path) => ({ path, status: statusForFile(path) }));
 
diff --git a/scripts/kb-update/dedup-plain-header.mjs b/scripts/kb-update/dedup-plain-header.mjs
new file mode 100644
index 0000000..a384b15
--- /dev/null
+++ b/scripts/kb-update/dedup-plain-header.mjs
@@ -0,0 +1,139 @@
+#!/usr/bin/env node
+// dedup-plain-header.mjs — Enhet 3 Op B (2026-07-07, ⊥ R7). Normalize the dual-header block on
+// the 4 ms-ai-governance/responsible-ai/ai-act-* files.
+//
+// Those files carry, below the bold header, an authored PLAIN-TEXT block:
+//     Last updated: <date>
+//     Status: GA
+//     Category: <value>            ← redundant with a bold **Category:** <same value> (R20)
+// This driver, per file:
+//   1. boldifyPlainField('Last updated')  — plain → **Last updated:**, date PRESERVED byte-exact
+//   2. boldifyPlainField('Status')        — plain → **Status:** GA, GA PRESERVED (authored, not
+//                                           the derived {Reference|Established Practice} vocab)
+//   3. dropRedundantPlainField('Category')— delete the plain Category iff a bold **Category:**
+//                                           with the IDENTICAL value proves it redundant
+// It NEVER derives a value and NEVER deletes a field it cannot prove redundant (the primitive
+// throws on a value mismatch or a missing bold field). A hard per-file invariant is asserted
+// BEFORE any write: exactly one line removed net, both target fields now bold with the authored
+// value, no plain header field remains, and the body (from the first `## `/`---`) is byte-
+// identical. Idempotent: a re-run finds the plain fields gone and is a no-op. Aborts, writing
+// nothing, on any drift or invariant breach.
+//
+// Closes the last 4 of the corpus's Missing-Status and all 4 Missing-English-Last-updated.
+//
+// Usage:  node scripts/kb-update/dedup-plain-header.mjs [--dry]
+import { readFileSync, writeFileSync, existsSync, realpathSync } from 'node:fs';
+import { join, dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { boldifyPlainField, dropRedundantPlainField } from './lib/transform.mjs';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const PLUGIN_ROOT = join(__dirname, '..', '..');
+
+// Frozen manifest — the 4 dual-header ai-act-* files (ground truth 2026-07-07: the only
+// non-advisor files carrying a plain-text Status/Last updated block).
+export const MANIFEST = [
+  'skills/ms-ai-governance/references/responsible-ai/ai-act-classification-methodology.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-act-deployer-obligations.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-act-fria-template.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-act-provider-obligations.md',
+];
+
+/**
+ * The pure Op-B composition: boldify the plain Last updated + Status, then drop the redundant
+ * plain Category. Order-independent for these files (distinct labels). Pure — no I/O.
+ * @param {string} content
+ * @returns {string}
+ */
+export function dedupPlainHeader(content) {
+  let out = boldifyPlainField(content, 'Last updated');
+  out = boldifyPlainField(out, 'Status');
+  out = dropRedundantPlainField(out, 'Category');
+  return out;
+}
+
+// Header region = lines above the first `## `/`---` (mirrors transform.mjs headerEndIndex).
+function splitHeaderBody(content) {
+  const lines = content.split('\n');
+  let i = 0;
+  for (; i < lines.length; i++) {
+    if (/^##\s/.test(lines[i]) || /^---\s*$/.test(lines[i])) break;
+  }
+  return { header: lines.slice(0, i).join('\n'), body: lines.slice(i).join('\n') };
+}
+
+const RE_PLAIN_META = /^(Last updated|Status|Category):\s*\S/im;
+
+// Assert the hard per-file invariant. Throws (aborting the run) on any breach.
+function assertInvariant(rel, oldC, newC) {
+  const o = oldC.split('\n');
+  const n = newC.split('\n');
+  if (n.length !== o.length - 1) {
+    throw new Error(`ABORT ${rel}: expected exactly one line removed net (was ${o.length}, now ${n.length})`);
+  }
+  const oldH = splitHeaderBody(oldC);
+  const newH = splitHeaderBody(newC);
+  if (oldH.body !== newH.body) throw new Error(`ABORT ${rel}: body not byte-identical`);
+  if (RE_PLAIN_META.test(newH.header)) throw new Error(`ABORT ${rel}: a plain header field remains`);
+  if (!/\*\*Last updated:\*\*\s*\S/.test(newH.header)) throw new Error(`ABORT ${rel}: **Last updated:** missing after dedup`);
+  if (!/\*\*Status:\*\*\s*\S/.test(newH.header)) throw new Error(`ABORT ${rel}: **Status:** missing after dedup`);
+  if ((newH.header.match(/\*\*Category:\*\*/g) || []).length !== 1) {
+    throw new Error(`ABORT ${rel}: expected exactly one bold **Category:** after dedup`);
+  }
+  // Value preservation: the authored plain values must survive verbatim in the bold lines.
+  const oldPlain = (label) => {
+    const m = new RegExp('^' + label.replace(/ /g, '\\ ') + ':\\s*(\\S.*?)\\s*$', 'im').exec(oldH.header);
+    return m ? m[1] : null;
+  };
+  for (const label of ['Last updated', 'Status']) {
+    const want = oldPlain(label);
+    const boldRe = new RegExp('\\*\\*' + label + ':\\*\\*\\s*(\\S.*?)\\s*$', 'im');
+    const got = boldRe.exec(newH.header);
+    if (!want || !got || got[1] !== want) {
+      throw new Error(`ABORT ${rel}: value for '${label}' not preserved (want ${JSON.stringify(want)}, got ${JSON.stringify(got && got[1])})`);
+    }
+  }
+}
+
+function run({ dry }) {
+  const planned = [];
+  const skipped = [];
+  const missing = [];
+
+  for (const rel of MANIFEST) {
+    const abs = join(PLUGIN_ROOT, rel);
+    if (!existsSync(abs)) { missing.push(rel); continue; }
+    const old = readFileSync(abs, 'utf8');
+    const out = dedupPlainHeader(old);
+    if (out === old) { skipped.push(rel); continue; } // idempotent: already deduped
+    assertInvariant(rel, old, out);
+    planned.push({ rel, out });
+  }
+
+  if (missing.length) {
+    console.error(`ABORT — ${missing.length} manifest target(s) not found (corpus drift):`);
+    missing.forEach((m) => console.error('  ' + m));
+    process.exit(1);
+  }
+  if (planned.length + skipped.length !== MANIFEST.length) {
+    throw new Error(`ABORT — accounted ${planned.length + skipped.length} ≠ manifest ${MANIFEST.length}`);
+  }
+
+  console.log(`Manifest: ${MANIFEST.length} | to dedup: ${planned.length} | already deduped (skipped): ${skipped.length}`);
+  if (dry) {
+    console.log('\n(dry run — no writes)');
+    for (const p of planned) console.log(`  ~ ${p.rel}`);
+    return;
+  }
+  for (const p of planned) writeFileSync(join(PLUGIN_ROOT, p.rel), p.out);
+  console.log(`\nWrote ${planned.length} files.`);
+}
+
+const isMain = (() => {
+  try {
+    return realpathSync(process.argv[1]) === realpathSync(fileURLToPath(import.meta.url));
+  } catch {
+    return false;
+  }
+})();
+if (isMain) run({ dry: process.argv.includes('--dry') });
diff --git a/scripts/kb-update/lib/transform.mjs b/scripts/kb-update/lib/transform.mjs
index 8ac90fa..2425903 100644
--- a/scripts/kb-update/lib/transform.mjs
+++ b/scripts/kb-update/lib/transform.mjs
@@ -418,6 +418,88 @@ export function insertMetaField(content, label, value) {
   return lines.join('\n');
 }
 
+// Header region ends at the first horizontal rule or `## ` section — mirrors the body
+// boundary the anchor loops above use. A plain-text meta line below this is genuine prose.
+function headerEndIndex(lines) {
+  for (let i = 0; i < lines.length; i++) {
+    if (/^##\s/.test(lines[i]) || /^---\s*$/.test(lines[i])) return i;
+  }
+  return lines.length;
+}
+
+/**
+ * Normalize a PLAIN-TEXT header field — `<label>: <value>` — to the house bold form
+ * `**<label>:** <value>`, PRESERVING the authored value byte-exact (Enhet 3 Op B dedup
+ * primitive for the dual-header ai-act-* files). Unlike insertMetaField this never derives a
+ * value: it only re-decorates a line the author already wrote. Acts on the FIRST plain match
+ * in the header region only (a `Status:` in body prose is untouched). Idempotent: if a bold
+ * `**<label>:**` already sits in the header the content is returned unchanged; likewise if no
+ * plain line exists. Body (from the first `## `/`---`) is byte-identical.
+ *
+ * @param {string} content — full existing file content
+ * @param {string} label — the label WITHOUT decoration, e.g. 'Last updated'
+ * @returns {string} content with the plain line re-decorated, or unchanged
+ * @throws if label is blank
+ */
+export function boldifyPlainField(content, label) {
+  const s = String(content ?? '');
+  const lab = String(label ?? '').trim();
+  if (lab === '') throw new Error('boldifyPlainField: label is required');
+  const esc = lab.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+  const boldRe = new RegExp('^\\s*\\*\\*' + esc + ':\\*\\*', 'i');
+  const plainRe = new RegExp('^\\s*' + esc + ':\\s*(\\S.*?)\\s*$', 'i');
+
+  const lines = s.split('\n');
+  const end = headerEndIndex(lines);
+  let plainIdx = -1;
+  for (let i = 0; i < end; i++) {
+    if (boldRe.test(lines[i])) return s; // idempotent: already bold → unchanged
+    if (plainIdx === -1 && plainRe.test(lines[i])) plainIdx = i;
+  }
+  if (plainIdx === -1) return s; // no plain line → unchanged
+  const val = plainRe.exec(lines[plainIdx])[1];
+  lines[plainIdx] = `**${lab}:** ${val}`;
+  return lines.join('\n');
+}
+
+/**
+ * Remove a PLAIN-TEXT header field — `<label>: <value>` — that is provably redundant with an
+ * existing bold `**<label>:** <value>` carrying the IDENTICAL value (Enhet 3 Op B dedup
+ * primitive). Refuses to guess: if no bold field exists, or the bold and plain values differ,
+ * it THROWS (that is a human decision, never an auto-delete). No-op if the plain line is absent
+ * (idempotent). Operates in the header region only; body is byte-identical.
+ *
+ * @param {string} content — full existing file content
+ * @param {string} label — the label WITHOUT decoration, e.g. 'Category'
+ * @returns {string} content with the redundant plain line removed, or unchanged
+ * @throws if label is blank, no bold field proves redundancy, or the values differ
+ */
+export function dropRedundantPlainField(content, label) {
+  const s = String(content ?? '');
+  const lab = String(label ?? '').trim();
+  if (lab === '') throw new Error('dropRedundantPlainField: label is required');
+  const esc = lab.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
+  const boldRe = new RegExp('^\\s*\\*\\*' + esc + ':\\*\\*\\s*(\\S.*?)\\s*$', 'i');
+  const plainRe = new RegExp('^\\s*' + esc + ':\\s*(\\S.*?)\\s*$', 'i');
+
+  const lines = s.split('\n');
+  const end = headerEndIndex(lines);
+  let boldVal = null;
+  let plainIdx = -1;
+  let plainVal = null;
+  for (let i = 0; i < end; i++) {
+    const bm = boldRe.exec(lines[i]);
+    if (bm && boldVal === null) boldVal = bm[1];
+    const pm = plainRe.exec(lines[i]);
+    if (pm && plainIdx === -1) { plainIdx = i; plainVal = pm[1]; }
+  }
+  if (plainIdx === -1) return s; // nothing to drop (idempotent)
+  if (boldVal === null) throw new Error(`dropRedundantPlainField: no bold **${lab}:** to prove redundancy for plain '${plainVal}'`);
+  if (boldVal !== plainVal) throw new Error(`dropRedundantPlainField: plain '${plainVal}' ≠ bold '${boldVal}' — not redundant, human decision`);
+  lines.splice(plainIdx, 1);
+  return lines.join('\n');
+}
+
 /**
  * Surgically insert-or-update ONLY the `**Verified:**` and `**Verified by:**` header lines
  * on an EXISTING KB file — the R7–R10 born-verified STAMP primitive. Unlike composeKbFile
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/cost-optimization-mlops-pipelines.md b/skills/ms-ai-engineering/references/mlops-genaiops/cost-optimization-mlops-pipelines.md
index 1a27551..c79d8a1 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/cost-optimization-mlops-pipelines.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/cost-optimization-mlops-pipelines.md
@@ -5,6 +5,7 @@
 **Relevans:** Azure Machine Learning, MLOps-implementering, FinOps for AI
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-ml-pipelines
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/feedback-loops-continuous-improvement.md b/skills/ms-ai-engineering/references/mlops-genaiops/feedback-loops-continuous-improvement.md
index 3b24bfd..f320d55 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/feedback-loops-continuous-improvement.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/feedback-loops-continuous-improvement.md
@@ -6,6 +6,7 @@
 **Confidence:** HIGH (basert på offisiell Microsoft-dokumentasjon)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/foundry/concepts/observability
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/genaiops-llm-specific-practices.md b/skills/ms-ai-engineering/references/mlops-genaiops/genaiops-llm-specific-practices.md
index 40c12c8..85392a7 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/genaiops-llm-specific-practices.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/genaiops-llm-specific-practices.md
@@ -6,6 +6,7 @@
 **Konfidensgrad:** Høy (basert på 18 MCP-kilder fra Microsoft Learn)
 **Type:** reference
 **Source:** https://learn.microsoft.com/python/api/overview/azure/ai-evaluation-readme
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/governance-audit-ml-operations.md b/skills/ms-ai-engineering/references/mlops-genaiops/governance-audit-ml-operations.md
index 8284c07..bc3ecce 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/governance-audit-ml-operations.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/governance-audit-ml-operations.md
@@ -5,6 +5,7 @@
 **Confidence:** 95% (High — bygger på offisiell Microsoft-dokumentasjon og Azure-referansearkitekturer)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-responsible-ai-dashboard
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/inferencing-optimization-caching.md b/skills/ms-ai-engineering/references/mlops-genaiops/inferencing-optimization-caching.md
index 2baf914..18e0306 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/inferencing-optimization-caching.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/inferencing-optimization-caching.md
@@ -5,6 +5,7 @@
 **Forfattet av:** Cosmo Skyberg, Senior Microsoft AI Solution Architect
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-onnx
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/infrastructure-as-code-mlops.md b/skills/ms-ai-engineering/references/mlops-genaiops/infrastructure-as-code-mlops.md
index 18869c9..ea2240a 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/infrastructure-as-code-mlops.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/infrastructure-as-code-mlops.md
@@ -5,6 +5,7 @@
 **Forfatter:** Cosmo Skyberg, Senior Microsoft AI Solution Architect
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/aks/concepts-machine-learning-ops
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/llm-evaluation-production.md b/skills/ms-ai-engineering/references/mlops-genaiops/llm-evaluation-production.md
index 8877fa1..4ed9ed3 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/llm-evaluation-production.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/llm-evaluation-production.md
@@ -5,6 +5,7 @@
 **Confidence:** High (basert på offisiell Microsoft dokumentasjon, Microsoft Foundry SDK, og MLflow 3)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/foundry/concepts/observability
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/mlops-security-access-control.md b/skills/ms-ai-engineering/references/mlops-genaiops/mlops-security-access-control.md
index 1a05542..03f014b 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/mlops-security-access-control.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/mlops-security-access-control.md
@@ -6,6 +6,7 @@
 **Confidence:** HIGH — Basert på offisiell Microsoft Learn dokumentasjon (8 MCP-oppslag, 16 kilder)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-enterprise-security
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/mlops-teams-collaboration-tools.md b/skills/ms-ai-engineering/references/mlops-genaiops/mlops-teams-collaboration-tools.md
index 6291c0b..f4a14a2 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/mlops-teams-collaboration-tools.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/mlops-teams-collaboration-tools.md
@@ -6,6 +6,7 @@
 **Konfidensgradering:** ⭐⭐⭐⭐⭐ (Verifisert mot offisiell Microsoft-dokumentasjon)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/overview-what-is-azure-machine-learning
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/model-deployment-strategies-azure.md b/skills/ms-ai-engineering/references/mlops-genaiops/model-deployment-strategies-azure.md
index 3469ad7..08c444b 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/model-deployment-strategies-azure.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/model-deployment-strategies-azure.md
@@ -7,6 +7,7 @@
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-model-management-and-deployment
 **Category:** MLOps & GenAIOps
+**Status:** Established Practice
 
 **Last updated:** 2026-04
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/monitoring-observability-ml-systems.md b/skills/ms-ai-engineering/references/mlops-genaiops/monitoring-observability-ml-systems.md
index b6e1cf8..4a13b8b 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/monitoring-observability-ml-systems.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/monitoring-observability-ml-systems.md
@@ -6,6 +6,7 @@
 **Konfidensgrad:** ⭐⭐⭐⭐⭐ (Verifisert mot offisiell Microsoft-dokumentasjon)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-model-monitoring
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/prompt-flow-production-deployment.md b/skills/ms-ai-engineering/references/mlops-genaiops/prompt-flow-production-deployment.md
index ac83d75..2dfc13a 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/prompt-flow-production-deployment.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/prompt-flow-production-deployment.md
@@ -6,6 +6,7 @@
 **Confidence:** 🟢 Høy (basert på offisiell Microsoft-dokumentasjon fra Microsoft Foundry og Azure Machine Learning)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/prompt-flow/migrate-prompt-flow-to-agent-framework
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-engineering/references/mlops-genaiops/responsible-ai-mlops-integration.md b/skills/ms-ai-engineering/references/mlops-genaiops/responsible-ai-mlops-integration.md
index ee10bca..849c287 100644
--- a/skills/ms-ai-engineering/references/mlops-genaiops/responsible-ai-mlops-integration.md
+++ b/skills/ms-ai-engineering/references/mlops-genaiops/responsible-ai-mlops-integration.md
@@ -5,6 +5,7 @@
 **Confidence:** 95% (basert på offisiell Microsoft-dokumentasjon og Azure Machine Learning-referanser)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-responsible-ai-dashboard
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-governance/references/monitoring-observability/anomaly-detection-ai-systems.md b/skills/ms-ai-governance/references/monitoring-observability/anomaly-detection-ai-systems.md
index acebddd..2323645 100644
--- a/skills/ms-ai-governance/references/monitoring-observability/anomaly-detection-ai-systems.md
+++ b/skills/ms-ai-governance/references/monitoring-observability/anomaly-detection-ai-systems.md
@@ -5,6 +5,7 @@
 **Målgruppe:** AI-arkitekter, DevOps-team, MLOps-ingeniører
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/ai-services/anomaly-detector/overview
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-governance/references/monitoring-observability/azure-monitor-setup-ai-workloads.md b/skills/ms-ai-governance/references/monitoring-observability/azure-monitor-setup-ai-workloads.md
index fb33037..0fab752 100644
--- a/skills/ms-ai-governance/references/monitoring-observability/azure-monitor-setup-ai-workloads.md
+++ b/skills/ms-ai-governance/references/monitoring-observability/azure-monitor-setup-ai-workloads.md
@@ -4,6 +4,7 @@
 **Last updated:** 2026-02-05
 **Gjelder for:** Azure OpenAI, Azure AI Services, Azure AI Search, Microsoft Foundry
 **Type:** reference
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-governance/references/monitoring-observability/log-analytics-kql-ai-queries.md b/skills/ms-ai-governance/references/monitoring-observability/log-analytics-kql-ai-queries.md
index c2c36f9..616fb32 100644
--- a/skills/ms-ai-governance/references/monitoring-observability/log-analytics-kql-ai-queries.md
+++ b/skills/ms-ai-governance/references/monitoring-observability/log-analytics-kql-ai-queries.md
@@ -5,6 +5,7 @@
 **Forfatter:** Cosmo Skyberg, AI Solution Architect
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/monitor-azure-machine-learning
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-governance/references/monitoring-observability/token-usage-tracking-attribution.md b/skills/ms-ai-governance/references/monitoring-observability/token-usage-tracking-attribution.md
index 0d6767b..f3b2319 100644
--- a/skills/ms-ai-governance/references/monitoring-observability/token-usage-tracking-attribution.md
+++ b/skills/ms-ai-governance/references/monitoring-observability/token-usage-tracking-attribution.md
@@ -5,6 +5,7 @@
 **Versjon:** 1.0
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/foundry/concepts/manage-costs
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/ai-act-classification-methodology.md b/skills/ms-ai-governance/references/responsible-ai/ai-act-classification-methodology.md
index 2696aaa..22718f5 100644
--- a/skills/ms-ai-governance/references/responsible-ai/ai-act-classification-methodology.md
+++ b/skills/ms-ai-governance/references/responsible-ai/ai-act-classification-methodology.md
@@ -2,9 +2,8 @@
 **Type:** regulatory
 **Category:** Responsible AI & Governance
 
-Last updated: 2026-06-18
-Status: GA
-Category: Responsible AI & Governance
+**Last updated:** 2026-06-18
+**Status:** GA
 
 ---
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/ai-act-deployer-obligations.md b/skills/ms-ai-governance/references/responsible-ai/ai-act-deployer-obligations.md
index 0f5afd2..6f55fe4 100644
--- a/skills/ms-ai-governance/references/responsible-ai/ai-act-deployer-obligations.md
+++ b/skills/ms-ai-governance/references/responsible-ai/ai-act-deployer-obligations.md
@@ -2,9 +2,8 @@
 **Type:** regulatory
 **Category:** Responsible AI & Governance
 
-Last updated: 2026-06-18
-Status: GA
-Category: Responsible AI & Governance
+**Last updated:** 2026-06-18
+**Status:** GA
 
 ---
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/ai-act-fria-template.md b/skills/ms-ai-governance/references/responsible-ai/ai-act-fria-template.md
index 5d9738f..a268e83 100644
--- a/skills/ms-ai-governance/references/responsible-ai/ai-act-fria-template.md
+++ b/skills/ms-ai-governance/references/responsible-ai/ai-act-fria-template.md
@@ -2,9 +2,8 @@
 **Type:** template
 **Category:** Responsible AI & Governance
 
-Last updated: 2026-02
-Status: GA
-Category: Responsible AI & Governance
+**Last updated:** 2026-02
+**Status:** GA
 
 ---
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/ai-act-provider-obligations.md b/skills/ms-ai-governance/references/responsible-ai/ai-act-provider-obligations.md
index 8f4ec59..d79ca0b 100644
--- a/skills/ms-ai-governance/references/responsible-ai/ai-act-provider-obligations.md
+++ b/skills/ms-ai-governance/references/responsible-ai/ai-act-provider-obligations.md
@@ -2,9 +2,8 @@
 **Type:** regulatory
 **Category:** Responsible AI & Governance
 
-Last updated: 2026-06-18
-Status: GA
-Category: Responsible AI & Governance
+**Last updated:** 2026-06-18
+**Status:** GA
 
 ---
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/ai-center-of-excellence-setup.md b/skills/ms-ai-governance/references/responsible-ai/ai-center-of-excellence-setup.md
index a332bd4..90c5912 100644
--- a/skills/ms-ai-governance/references/responsible-ai/ai-center-of-excellence-setup.md
+++ b/skills/ms-ai-governance/references/responsible-ai/ai-center-of-excellence-setup.md
@@ -5,6 +5,7 @@
 **Confidence:** HIGH (basert på Microsoft Cloud Adoption Framework og offisiell dokumentasjon)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/cloud-adoption-framework/scenarios/ai/govern
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/ai-governance-structure-framework.md b/skills/ms-ai-governance/references/responsible-ai/ai-governance-structure-framework.md
index 9284b9e..4758c36 100644
--- a/skills/ms-ai-governance/references/responsible-ai/ai-governance-structure-framework.md
+++ b/skills/ms-ai-governance/references/responsible-ai/ai-governance-structure-framework.md
@@ -5,6 +5,7 @@
 **Målgruppe:** Tekniske beslutningstakere, AI-arkitekter, governance-team
 **Oppdateringsfrekvens:** Kvartalsvis (Q1 2026)
 **Type:** methodology
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-governance/references/responsible-ai/red-teaming-ai-models.md b/skills/ms-ai-governance/references/responsible-ai/red-teaming-ai-models.md
index 0dca15b..6ef5420 100644
--- a/skills/ms-ai-governance/references/responsible-ai/red-teaming-ai-models.md
+++ b/skills/ms-ai-governance/references/responsible-ai/red-teaming-ai-models.md
@@ -6,6 +6,7 @@
 **Konfidensgrad:** ⚠️ HIGH — Basert på offisiell Microsoft-dokumentasjon (jun 2026)
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/ai-services/content-safety/concepts/jailbreak-detection
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-security/references/ai-security-engineering/ai-red-team-operations-practical.md b/skills/ms-ai-security/references/ai-security-engineering/ai-red-team-operations-practical.md
index 74b33bc..6d8cd8a 100644
--- a/skills/ms-ai-security/references/ai-security-engineering/ai-red-team-operations-practical.md
+++ b/skills/ms-ai-security/references/ai-security-engineering/ai-red-team-operations-practical.md
@@ -5,6 +5,7 @@
 **Relatert:** ai-prompt-injection-defense.md, ai-jailbreak-prevention.md
 **Source:** https://learn.microsoft.com/security/ai-red-team/training
 **Type:** reference
+**Status:** Established Practice
 
 ---
 
diff --git a/skills/ms-ai-security/references/ai-security-engineering/data-leakage-prevention-ai.md b/skills/ms-ai-security/references/ai-security-engineering/data-leakage-prevention-ai.md
index 8c41498..2d704d6 100644
--- a/skills/ms-ai-security/references/ai-security-engineering/data-leakage-prevention-ai.md
+++ b/skills/ms-ai-security/references/ai-security-engineering/data-leakage-prevention-ai.md
@@ -5,6 +5,7 @@
 **Målgruppe:** Enterprise AI architects og security teams
 **Type:** reference
 **Source:** https://learn.microsoft.com/security/benchmark/azure/mcsb-v2-artificial-intelligence-security
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-security/references/ai-security-engineering/secure-model-deployment-hardening.md b/skills/ms-ai-security/references/ai-security-engineering/secure-model-deployment-hardening.md
index b0f59dd..cba7785 100644
--- a/skills/ms-ai-security/references/ai-security-engineering/secure-model-deployment-hardening.md
+++ b/skills/ms-ai-security/references/ai-security-engineering/secure-model-deployment-hardening.md
@@ -4,6 +4,7 @@
 **Last updated:** 2026-02-05
 **Målgruppe:** Arkitekter som skal sikre AI-modeller i produksjonsmiljøer
 **Type:** reference
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-security/references/ai-security-engineering/security-copilot-integration.md b/skills/ms-ai-security/references/ai-security-engineering/security-copilot-integration.md
index 7599108..666bd2b 100644
--- a/skills/ms-ai-security/references/ai-security-engineering/security-copilot-integration.md
+++ b/skills/ms-ai-security/references/ai-security-engineering/security-copilot-integration.md
@@ -5,6 +5,7 @@
 **Målgruppe:** Sikkerhetsarkitekter og SOC-ledere som vurderer AI-assistert sikkerhetsoperasjon
 **Type:** reference
 **Source:** https://learn.microsoft.com/copilot/security/agents-overview
+**Status:** Established Practice
 
 ## Innhold
 
diff --git a/skills/ms-ai-security/references/ai-security-engineering/supply-chain-security-ai-models.md b/skills/ms-ai-security/references/ai-security-engineering/supply-chain-security-ai-models.md
index 41da776..1c957bc 100644
--- a/skills/ms-ai-security/references/ai-security-engineering/supply-chain-security-ai-models.md
+++ b/skills/ms-ai-security/references/ai-security-engineering/supply-chain-security-ai-models.md
@@ -5,6 +5,7 @@
 **Relatert plattform:** Microsoft Foundry, Azure Machine Learning, Azure DevOps, Microsoft Defender for Cloud
 **Type:** reference
 **Source:** https://learn.microsoft.com/azure/machine-learning/concept-vulnerability-management
+**Status:** Established Practice
 
 ---
 
diff --git a/tests/kb-update/test-backfill-status.test.mjs b/tests/kb-update/test-backfill-status.test.mjs
index fece324..1987f94 100644
--- a/tests/kb-update/test-backfill-status.test.mjs
+++ b/tests/kb-update/test-backfill-status.test.mjs
@@ -1,23 +1,28 @@
 // tests/kb-update/test-backfill-status.test.mjs
-// TDD for R21 — Status backfill on the 18 English-dialect not-due reference files that
-// lack **Status:**. The applier (backfill-status.mjs) is a manifest-driven driver over the
-// already-tested insertMetaField primitive; the ONLY new production logic is the pure
-// deterministic value rule statusForFile() + the frozen MANIFEST. This suite pins both:
+// TDD for the Status-backfill mechanism (R21 + Enhet 3). The applier (backfill-status.mjs)
+// is a manifest-driven driver over the already-tested insertMetaField primitive; the ONLY
+// new production logic is the pure deterministic value rule statusForFile() + the frozen
+// MANIFEST. This suite pins both:
 //   - statusForFile: filename token (template|matrix|benchmarks|register) → 'Reference',
-//     else 'Established Practice'. Operator-approved vocabulary (2026-07-06), scope-confirmed
-//     18 files (ground truth: not-due ∩ missing-**Status:** ∩ English-dialect).
-//   - MANIFEST self-consistency: 18 distinct entries, each value === statusForFile(path).
-// The 21 Last-updated-relabels + 5 unreliable-git + 3 Norwegian-dialect-Status are OUT of
-// R21 (corrected decision-b residual) and intentionally NOT in this manifest.
+//     else 'Established Practice'. Operator-approved vocabulary (2026-07-06).
+//   - MANIFEST self-consistency: distinct entries, each value === statusForFile(path).
+//
+// Scope history:
+//   R21 (2026-07-06)   — 14 English-dialect advisor/architecture files (7 Reference + 7 EP).
+//   Enhet 3 (2026-07-07) — +25 non-advisor "none"-dialect files that lack **Status:** entirely
+//     (ground-truth measured: 25, NOT the roadmap's "27" — 2 of the roadmap count were files
+//     whose bold **Status:** sits past byte 500, i.e. present-but-header-invisible, a separate
+//     header-slanking residual, not a missing-Status file). None of the 25 match the artifact
+//     token → all 'Established Practice'. The 4 dual-header ai-act-* files are handled by the
+//     plain→bold dedup driver (dedup-plain-header.mjs), NOT here — they carry an authored
+//     `Status: GA` we preserve, so they must stay OUT of this derive-a-value manifest.
 
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { statusForFile, MANIFEST, ALLOWED_STATUS } from '../../scripts/kb-update/backfill-status.mjs';
 
-// The 14 scope-confirmed R21 targets (clean advisor/architecture). The 4 ms-ai-governance
-// ai-act-* files that matched the token rule are NOT here: they carry a plain-text `Status: GA`
-// in a dual-header block (bold-regex-invisible), so they are deferred to the decision-b residual.
-const REFERENCE = [
+// The 14 R21 advisor targets (clean advisor/architecture).
+const ADVISOR_REFERENCE = [
   'adr-template.md',
   'ai-utredning-template.md',
   'capacity-feasibility-benchmarks.md',
@@ -26,7 +31,7 @@ const REFERENCE = [
   'poc-template.md',
   'source-traceability-assumption-register.md',
 ];
-const ESTABLISHED = [
+const ADVISOR_ESTABLISHED = [
   'alternativanalyse-methodology.md',
   'cost-models.md',
   'decision-trees.md',
@@ -36,12 +41,42 @@ const ESTABLISHED = [
   'security.md',
 ];
 
+// The 25 Enhet-3 non-advisor targets (missing **Status:** entirely). All → Established
+// Practice (none carries a template/matrix/benchmarks/register token).
+const NON_ADVISOR_ESTABLISHED = [
+  'skills/ms-ai-engineering/references/mlops-genaiops/cost-optimization-mlops-pipelines.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/feedback-loops-continuous-improvement.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/genaiops-llm-specific-practices.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/governance-audit-ml-operations.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/inferencing-optimization-caching.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/infrastructure-as-code-mlops.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/llm-evaluation-production.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/mlops-security-access-control.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/mlops-teams-collaboration-tools.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/model-deployment-strategies-azure.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/monitoring-observability-ml-systems.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/prompt-flow-production-deployment.md',
+  'skills/ms-ai-engineering/references/mlops-genaiops/responsible-ai-mlops-integration.md',
+  'skills/ms-ai-governance/references/monitoring-observability/anomaly-detection-ai-systems.md',
+  'skills/ms-ai-governance/references/monitoring-observability/azure-monitor-setup-ai-workloads.md',
+  'skills/ms-ai-governance/references/monitoring-observability/log-analytics-kql-ai-queries.md',
+  'skills/ms-ai-governance/references/monitoring-observability/token-usage-tracking-attribution.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-center-of-excellence-setup.md',
+  'skills/ms-ai-governance/references/responsible-ai/ai-governance-structure-framework.md',
+  'skills/ms-ai-governance/references/responsible-ai/red-teaming-ai-models.md',
+  'skills/ms-ai-security/references/ai-security-engineering/ai-red-team-operations-practical.md',
+  'skills/ms-ai-security/references/ai-security-engineering/data-leakage-prevention-ai.md',
+  'skills/ms-ai-security/references/ai-security-engineering/secure-model-deployment-hardening.md',
+  'skills/ms-ai-security/references/ai-security-engineering/security-copilot-integration.md',
+  'skills/ms-ai-security/references/ai-security-engineering/supply-chain-security-ai-models.md',
+];
+
 test('statusForFile: artifact-token filenames → Reference', () => {
-  for (const b of REFERENCE) assert.equal(statusForFile(b), 'Reference', b);
+  for (const b of ADVISOR_REFERENCE) assert.equal(statusForFile(b), 'Reference', b);
 });
 
 test('statusForFile: methodology/guidance/obligation filenames → Established Practice', () => {
-  for (const b of ESTABLISHED) assert.equal(statusForFile(b), 'Established Practice', b);
+  for (const b of ADVISOR_ESTABLISHED) assert.equal(statusForFile(b), 'Established Practice', b);
 });
 
 test('statusForFile: keys on basename only, not on ancestor folders', () => {
@@ -52,29 +87,38 @@ test('statusForFile: keys on basename only, not on ancestor folders', () => {
 });
 
 test('statusForFile: always returns an allowed value', () => {
-  for (const b of [...REFERENCE, ...ESTABLISHED, 'anything-else.md']) {
+  for (const b of [...ADVISOR_REFERENCE, ...ADVISOR_ESTABLISHED, 'anything-else.md']) {
     assert.ok(ALLOWED_STATUS.includes(statusForFile(b)), b);
   }
 });
 
-test('MANIFEST: exactly 14 distinct entries, each value === statusForFile(path)', () => {
-  assert.equal(MANIFEST.length, 14);
+test('MANIFEST: exactly 39 distinct entries, each value === statusForFile(path)', () => {
+  assert.equal(MANIFEST.length, 39);
   const paths = new Set(MANIFEST.map((m) => m.path));
-  assert.equal(paths.size, 14, 'duplicate path in MANIFEST');
+  assert.equal(paths.size, 39, 'duplicate path in MANIFEST');
   for (const { path, status } of MANIFEST) {
     assert.ok(ALLOWED_STATUS.includes(status), `bad status for ${path}`);
     assert.equal(status, statusForFile(path), `manifest/rule mismatch for ${path}`);
   }
 });
 
-test('MANIFEST: 7 Reference + 7 Established Practice (scope-confirmed split)', () => {
+test('MANIFEST: 7 Reference + 32 Established Practice (R21 14 + Enhet 3 25)', () => {
   const ref = MANIFEST.filter((m) => m.status === 'Reference').length;
   const est = MANIFEST.filter((m) => m.status === 'Established Practice').length;
   assert.equal(ref, 7);
-  assert.equal(est, 7);
+  assert.equal(est, 32);
 });
 
-test('MANIFEST: excludes the 4 dual-header ai-act-* files (decision-b residual)', () => {
+test('MANIFEST: all 25 Enhet-3 non-advisor targets present and Established Practice', () => {
+  for (const p of NON_ADVISOR_ESTABLISHED) {
+    const entry = MANIFEST.find((m) => m.path === p);
+    assert.ok(entry, `missing from MANIFEST: ${p}`);
+    assert.equal(entry.status, 'Established Practice', p);
+    assert.equal(statusForFile(p), 'Established Practice', p);
+  }
+});
+
+test('MANIFEST: excludes the 4 dual-header ai-act-* files (handled by dedup driver, authored Status: GA preserved)', () => {
   const deferred = [
     'ai-act-classification-methodology.md',
     'ai-act-deployer-obligations.md',
@@ -82,6 +126,6 @@ test('MANIFEST: excludes the 4 dual-header ai-act-* files (decision-b residual)'
     'ai-act-provider-obligations.md',
   ];
   for (const d of deferred) {
-    assert.ok(!MANIFEST.some((m) => m.path.endsWith(d)), `${d} must be deferred, not in MANIFEST`);
+    assert.ok(!MANIFEST.some((m) => m.path.endsWith(d)), `${d} must not be in the Status-derive MANIFEST`);
   }
 });
diff --git a/tests/kb-update/test-dedup-plain-header.test.mjs b/tests/kb-update/test-dedup-plain-header.test.mjs
new file mode 100644
index 0000000..cee192f
--- /dev/null
+++ b/tests/kb-update/test-dedup-plain-header.test.mjs
@@ -0,0 +1,123 @@
+// tests/kb-update/test-dedup-plain-header.test.mjs
+// TDD for Enhet 3 Op B — the dual-header plain→bold dedup on the 4 ms-ai-governance
+// ai-act-* files. Those files carry an authored, PLAIN-TEXT block
+//     Last updated: <date>
+//     Status: GA
+//     Category: <value>            ← redundant: a bold **Category:** <same value> already exists
+// (R20 inserted the bold Category; the plain block is the original dual header). This is NOT a
+// derive-a-value backfill (backfill-status.mjs owns that) — the authored values are PRESERVED
+// byte-exact; only their label decoration is normalized to bold, and the provably-redundant
+// plain Category line is removed. Two new pure primitives + a pure composition are pinned here.
+
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { boldifyPlainField, dropRedundantPlainField } from '../../scripts/kb-update/lib/transform.mjs';
+import { dedupPlainHeader, MANIFEST } from '../../scripts/kb-update/dedup-plain-header.mjs';
+
+// An ai-act-shaped fixture: bold Type+Category (Category from R20), then the plain block,
+// then a body that itself mentions "Status:" in prose (must never be touched).
+const FIXTURE = [
+  '# EU AI Act — Systematisk Klassifiseringsmetodikk',
+  '**Type:** regulatory',
+  '**Category:** Responsible AI & Governance',
+  '',
+  'Last updated: 2026-06-18',
+  'Status: GA',
+  'Category: Responsible AI & Governance',
+  '',
+  '---',
+  '',
+  '## Innhold',
+  '',
+  'A body paragraph that says Status: draft in prose — must be left alone.',
+  '',
+].join('\n');
+
+// ── boldifyPlainField ────────────────────────────────────────────────────────
+test('boldifyPlainField: plain header field → bold, value preserved byte-exact', () => {
+  const out = boldifyPlainField(FIXTURE, 'Last updated');
+  assert.ok(out.includes('**Last updated:** 2026-06-18'), 'bold line present');
+  assert.ok(!/^Last updated:/m.test(out.split('\n---')[0]), 'plain header line gone');
+});
+
+test('boldifyPlainField: idempotent — a bold field already present is unchanged', () => {
+  const once = boldifyPlainField(FIXTURE, 'Status');
+  const twice = boldifyPlainField(once, 'Status');
+  assert.equal(twice, once);
+});
+
+test('boldifyPlainField: no plain field in header → unchanged', () => {
+  assert.equal(boldifyPlainField(FIXTURE, 'Nonexistent'), FIXTURE);
+});
+
+test('boldifyPlainField: never touches a match in the body (below the header region)', () => {
+  const out = boldifyPlainField(FIXTURE, 'Status');
+  assert.ok(out.includes('says Status: draft in prose'), 'body prose untouched');
+  // exactly one bold Status inserted (the header one), body "Status:" not bolded
+  assert.equal((out.match(/\*\*Status:\*\*/g) || []).length, 1);
+});
+
+test('boldifyPlainField: body byte-identical (only the header line changes)', () => {
+  const out = boldifyPlainField(FIXTURE, 'Status');
+  const bodyOf = (c) => c.slice(c.indexOf('\n---'));
+  assert.equal(bodyOf(out), bodyOf(FIXTURE));
+});
+
+// ── dropRedundantPlainField ──────────────────────────────────────────────────
+test('dropRedundantPlainField: drops the plain line when a bold field with the same value exists', () => {
+  const out = dropRedundantPlainField(FIXTURE, 'Category');
+  const header = out.split('\n---')[0];
+  assert.ok(/\*\*Category:\*\* Responsible AI & Governance/.test(header), 'bold Category kept');
+  assert.ok(!/^Category:/m.test(header), 'plain Category removed');
+  assert.equal(out.split('\n').length, FIXTURE.split('\n').length - 1, 'exactly one line removed');
+});
+
+test('dropRedundantPlainField: throws when plain value ≠ bold value (not redundant, human decision)', () => {
+  const mismatched = FIXTURE.replace('Category: Responsible AI & Governance', 'Category: Something Else');
+  assert.throws(() => dropRedundantPlainField(mismatched, 'Category'), /not redundant|≠/);
+});
+
+test('dropRedundantPlainField: throws when no bold field exists to prove redundancy', () => {
+  const noBold = FIXTURE.replace('**Category:** Responsible AI & Governance\n', '');
+  assert.throws(() => dropRedundantPlainField(noBold, 'Category'), /no bold/i);
+});
+
+test('dropRedundantPlainField: no-op when the plain line is absent (idempotent)', () => {
+  const once = dropRedundantPlainField(FIXTURE, 'Category');
+  assert.equal(dropRedundantPlainField(once, 'Category'), once);
+});
+
+// ── dedupPlainHeader (full composition) ──────────────────────────────────────
+test('dedupPlainHeader: boldifies Last updated + Status, drops redundant plain Category', () => {
+  const out = dedupPlainHeader(FIXTURE);
+  const header = out.split('\n---')[0];
+  assert.ok(/\*\*Last updated:\*\* 2026-06-18/.test(header), 'Last updated bolded, value preserved');
+  assert.ok(/\*\*Status:\*\* GA/.test(header), 'Status bolded, GA preserved');
+  assert.equal((header.match(/\*\*Category:\*\*/g) || []).length, 1, 'exactly one bold Category');
+  assert.ok(!/^(Last updated|Status|Category):/m.test(header), 'no plain header fields remain');
+});
+
+test('dedupPlainHeader: net one line removed, body byte-identical', () => {
+  const out = dedupPlainHeader(FIXTURE);
+  assert.equal(out.split('\n').length, FIXTURE.split('\n').length - 1);
+  const bodyOf = (c) => c.slice(c.indexOf('\n---'));
+  assert.equal(bodyOf(out), bodyOf(FIXTURE));
+});
+
+test('dedupPlainHeader: idempotent — a second pass is a no-op', () => {
+  const once = dedupPlainHeader(FIXTURE);
+  assert.equal(dedupPlainHeader(once), once);
+});
+
+// ── MANIFEST ─────────────────────────────────────────────────────────────────
+test('MANIFEST: exactly the 4 dual-header ai-act-* files', () => {
+  assert.equal(MANIFEST.length, 4);
+  assert.equal(new Set(MANIFEST).size, 4, 'no duplicates');
+  const expected = [
+    'skills/ms-ai-governance/references/responsible-ai/ai-act-classification-methodology.md',
+    'skills/ms-ai-governance/references/responsible-ai/ai-act-deployer-obligations.md',
+    'skills/ms-ai-governance/references/responsible-ai/ai-act-fria-template.md',
+    'skills/ms-ai-governance/references/responsible-ai/ai-act-provider-obligations.md',
+  ];
+  for (const p of expected) assert.ok(MANIFEST.includes(p), `missing ${p}`);
+});