feat(linkedin-studio): N15 — do-next-kontrakt (recordDoNext + skrivere/lesere + forrige-utgave-kalibrering) [skip-docs]

Måling som ikke endrer neste utgave er teater: report/analyze/ab-test/48h-monitor
endte alle i chat (grep do.next = 0 i hele repoet). N15 gjør kanalen til en kontrakt.

- recordDoNext i hooks/scripts/state-updater.mjs (TDD, 17 nye tester): seksjonen
  Do-Next Directives, rader "[dato] (kilde) direktiv — evidence: peker".
  Levetid = erstatt-per-kilde + 60-dagers aldersgulv, maks 3 per skriv, additiv
  scalar last_donext_date, $-sikre replacement-funksjoner. CLI: --record-do-next.
- Skrivere: report Step 7b, analyze Step 6b, ab-test 2c.6 (kun Adopt),
  post-feedback-monitor (kun 48h-sjekken); analytics-interpreter emitterer nå
  anbefalinger på do-next-form (imperativ + evidens).
- Lesere: post/quick/batch/create Step 0 + newsletter Step 1, som i tillegg
  kalibrerer på forrige utgaves MÅLTE tall via queue-id-match (queue.json →
  analytics/posts) med eksplisitt honest-miss — aldri estimert.
- Guards: test-runner Section 16v (15 ubetingede sjekker, floor 198 → 213),
  $-safety-batteriet dekker recordDoNext (coverage-gate fanget den nye eksporten).

Suiter: test-runner 232/0, hooks 191/0, trends 300/0, brain 134/0, editions 72/0,
specifics-bank 45/0, contract-gate 33/0, tests 35/0, render 60/0.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QxvWAjte7vPcF79QeSRvRJ

scripts/check-replace-safety.mjs

@@ -209,6 +209,45 @@ const BATTERY = [
       },
     ],
   },
+  {
+    fn: "recordDoNext",
+    cases: [
+      {
+        path: "section CREATE, free-text directive/evidence",
+        run: () => mod.recordDoNext(SAMPLE, {
+          recordDate: "2026-05-30", source: "report",
+          directives: [{ directive: PAYLOAD, evidence: PAYLOAD }],
+        }),
+        expect: [`(report) ${PAYLOAD} — evidence: ${PAYLOAD}`],
+        once: [/^## Do-Next Directives$/gm],
+      },
+      {
+        path: "section REWRITE (supersede/prune path) — the kept + new rows are re-emitted",
+        run: () => {
+          // Two writes: the second rebuilds the section body, so a `$`-bearing row
+          // written by ANOTHER source has to survive being re-emitted verbatim.
+          const first = mod.recordDoNext(SAMPLE, {
+            recordDate: "2026-05-28", source: "ab-test",
+            directives: [{ directive: PAYLOAD, evidence: PAYLOAD }],
+            today: new Date("2026-06-10T00:00:00Z"),
+          });
+          return mod.recordDoNext(first.content, {
+            recordDate: "2026-05-30", source: "report",
+            directives: [{ directive: PAYLOAD, evidence: PAYLOAD }],
+            today: new Date("2026-06-10T00:00:00Z"),
+          });
+        },
+        expect: [`(ab-test) ${PAYLOAD} — evidence: ${PAYLOAD}`, `(report) ${PAYLOAD} — evidence: ${PAYLOAD}`],
+        once: [/^## Do-Next Directives$/gm],
+      },
+      {
+        path: "date additive-insert via last_post_date anchor — recordDate fuzzed",
+        run: () => mod.recordDoNext(SAMPLE, { recordDate: PAYLOAD, source: "report", directives: ["d"] }),
+        expect: [`last_donext_date: "${PAYLOAD}"`],
+        once: [/^last_donext_date:/gm],
+      },
+    ],
+  },
 ];
 
 // --- Backstop 1: coverage completeness -------------------------------------------