fix(linkedin): close dogfood friction (S14)

Close all 9 friction points from the S13 newsletter dogfood (operator
elected to fix F6-F9 rather than defer):

- F1: namespace all subagent_type calls in newsletter.md to
  linkedin-thought-leadership:<name> (4 sites + canonical note)
- F2: document agent invocation form + reload requirement in CLAUDE.md
  + README.md (reload itself is an operator action)
- F3: add edition-config / edition-delingstekst / edition-HANDOVER
  templates under config/ + wire into Steps 0 and 8 + footer
- F4: reconcile draft path to <serie>/NN-utkast.md (series root)
- F5: de-hardcode series root (explicit arg / LTL_SERIES_ROOT / default)
- F6: config-derive carousel editions (remove Seres CAROUSEL set);
  correct samle comment
- F7: build-html.mjs exits non-zero when zero HTML produced
- F8: guard parseDelingstekst (graceful ENOENT) + correct Step 8 wording
- F9: relocate agents/README.md -> docs/agents-capability-matrix.md

Re-tested: 87/87 plugin tests pass; build-html/build-linkedin behavior
re-verified live. Per-item outcomes logged in dogfood-S13-friction.md.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plugins/linkedin-thought-leadership/render/build-linkedin.mjs

@@ -38,7 +38,7 @@ const DELINGSTEKST_FILE = path.join(OUT_ROOT, "edition-delingstekst.md");
 // ---------------------------------------------------------------------------
 const CONFIG_FILE = path.join(OUT_ROOT, "edition-config.json");
 
-const EMPTY_CONFIG = { calendar: {}, freshness: {}, coverCredit: "", captions: {} };
+const EMPTY_CONFIG = { calendar: {}, freshness: {}, coverCredit: "", captions: {}, carousel: [] };
 
 // Les edition-config.json fra rootDir (serie-mappas linkedin/). Normaliser alle
 // felt til kjente former; manglende/ugyldig fil → tomme standarder (graceful).
@@ -55,13 +55,13 @@ export function loadEditionConfig(rootDir = OUT_ROOT) {
     freshness: cfg.freshness && typeof cfg.freshness === "object" ? cfg.freshness : {},
     coverCredit: typeof cfg.coverCredit === "string" ? cfg.coverCredit : "",
     captions: cfg.captions && typeof cfg.captions === "object" ? cfg.captions : {},
+    // S14/F6: carousel editions are config-derived, not Seres-hardcoded. A list of
+    // zero-padded NN strings ("03","06"); empty/absent → no carousel block for any
+    // edition. Generalizes away the old `new Set(["03","06"])` Seres assumption.
+    carousel: Array.isArray(cfg.carousel) ? cfg.carousel.map(String) : [],
   };
 }
 
-// CAROUSEL-settet er ikke en del av S2-konfig-scope (kun CALENDAR/FRESHNESS/
-// CAPTIONS/COVER_CREDIT generaliseres) — beholdes hardkodet inntil videre.
-const CAROUSEL = new Set(["03", "06"]);
-
 // ---------------------------------------------------------------------------
 // YAML front matter (flate key: "value"-par mellom --- ... ---)
 // ---------------------------------------------------------------------------
@@ -177,7 +177,16 @@ function seoTitle(title) {
 // En seksjon = «## Del N — …» eller «## Samle…». «## SYSTEM …» ignoreres.
 // ---------------------------------------------------------------------------
 function parseDelingstekst() {
-  const raw = fs.readFileSync(DELINGSTEKST_FILE, "utf8").replace(/\r\n/g, "\n");
+  // Graceful (S14/F8): missing or unreadable delingstekst → no distribution copy.
+  // Matches loadEditionConfig's fail-soft contract — the article POST.html still
+  // builds; only the share text is absent. Previously this threw ENOENT before any
+  // POST.html was written, killing the whole build incl. article posts.
+  let raw;
+  try {
+    raw = fs.readFileSync(DELINGSTEKST_FILE, "utf8").replace(/\r\n/g, "\n");
+  } catch {
+    return {};
+  }
   const lines = raw.split("\n");
   const out = {};
   let i = 0;
@@ -266,7 +275,7 @@ export function editionPost(nn, meta, body, share, config = EMPTY_CONFIG) {
   const copyZone = [subtitle, ...blocks].filter(Boolean).join("\n  ");
   const shareField = share ? `${share.share}\n\n${share.hashtags}` : "—";
 
-  const carouselBlock = CAROUSEL.has(nn)
+  const carouselBlock = (config.carousel || []).includes(nn)
     ? `<div class="fld"><h2>6 · Carousel (valgfritt rekkevidde-tillegg)</h2>
        <div class="val">Egen dokument-post, helst egen dag: last opp <code>linkedin/${nn}/carousel.pdf</code>.
        Caption = delingstekstens premiss-linje.</div></div>`
@@ -308,7 +317,7 @@ export function editionPost(nn, meta, body, share, config = EMPTY_CONFIG) {
 
   ${carouselBlock}
 
-  <div class="marker">⬇︎ ${CAROUSEL.has(nn) ? "7" : "6"} · BRØDTEKST — merk alt herfra, kopier (⌘C), lim i editoren ⬇︎</div>
+  <div class="marker">⬇︎ ${(config.carousel || []).includes(nn) ? "7" : "6"} · BRØDTEKST — merk alt herfra, kopier (⌘C), lim i editoren ⬇︎</div>
   <div class="copyzone">
   ${copyZone}
   </div>
@@ -361,7 +370,9 @@ export function main(files = process.argv.slice(2)) {
     console.log(`✓ linkedin/${nn}/POST.html  (${meta.title || base})`);
   }
 
-  // Samle bygges alltid (innhold er uavhengig av utkast-filene)
+  // Samle bygges KUN når delingsteksten deklarerer en «## Samle»-seksjon (S14/F6:
+  // tidligere kommentar sa «alltid», men bygget har alltid vært betinget av
+  // shareMap.samle — innholdet er uavhengig av utkast-filene, men ikke av delingstekst).
   if (shareMap.samle) {
     const dir = path.join(OUT_ROOT, "samle");
     fs.mkdirSync(dir, { recursive: true });