feat(linkedin-studio): N13 — publiserings-slots + vacancy-varsel + WIP-roll-up + slot-default [skip-docs]

A1-10 + D-5. The queue answers "what is scheduled"; nothing answered "is the week
covered, and what is still being written". N13 makes both readable at session start.

- Publishing slots are operator config: profile/publishing-slots.json in the per-user
  data dir, schema + OPT-IN template in config/publishing-slots.template.json. The
  plugin ships no publishing times and writes the grid for nobody; absent config means
  every slot surface stays silent (same never-nag discipline as the trend/brain nudges).
  Data dir rather than the state file, which is machine-written and whose frontmatter
  reader does not parse lists.
- hooks/scripts/slots.mjs (new): one implementation behind four surfaces. Zero-dep (a
  SessionStart hook must not spawn tsx), pure core (dates in as strings, no clock),
  imported by the commands exactly as queue-manager.mjs already is — so session-start's
  vacancy warning and Step 10's slot default cannot drift apart.
- Coverage counts the short-form queue (scheduled/published; cancelled frees the slot)
  AND editions-register rows claiming that date, counted per date, so long-form and
  short-form cannot be double-booked and a two-slot day needs two posts.
- Session start gains "## Editions in Flight" (series, phase, next action, claimed slot,
  days in flight) and "## Publishing Slots" (next open slot, open count in 14 days, and
  how to fill it when the gap is <=3 days). The existing discovery nudge is untouched.
- /linkedin router + /linkedin:calendar surface the same roll-up; calendar documents the
  opt-in copy. /linkedin:newsletter Step 10 defaults to the next open slot (one
  confirmation, not an interview) and writes --slot onto the register row.
- D-5: references/scheduling-strategy.md marked "confidence: low / directional" per the
  algorithm reference's own standard, deferring to the operator's grid and their own
  analytics. Neutral example time replaces the operator-specific one in the N12 docs.

TDD: red proven first (module absent; 5 session-start behaviours failing).
hooks 140 -> 174 · test-runner 184 -> 197 (Section 16t: 13 unconditional greps incl. a
de-niche check that no publishing time is hardcoded in the slot path and no operator grid
is committed, + non-vacuity self-test; anti-erosion floor 166 -> 179).
Suites green: trends 300/0 · brain 134/0 · editions 72/0 · specifics-bank 45/0 ·
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/editions/README.md

@@ -89,7 +89,7 @@ and mirrors the edition's row into the register.
 # at EVERY phase transition (after currentPhase has been written)
 node --import tsx src/cli.ts register-upsert \
   --edition-state "<serie>/linkedin/edition-state.json" \
-  --next "Step 3a — spine prose" [--slot "2026-07-28 07:45"] [--path <series-root>]
+  --next "Step 3a — spine prose" [--slot "2026-07-28 08:30"] [--path <series-root>]
 
 # the week's work-in-progress, without opening a single series folder
 node --import tsx src/cli.ts register-list [--all] [--json]

scripts/editions/tests/register.test.ts

@@ -115,7 +115,7 @@ describe("register — upsert", () => {
   test("omitted nextAction/slot/title are PRESERVED, not blanked", () => {
     const withSlot = upsertEdition(
       seed(),
-      { series: "seres", editionId: "05", path: "/p", currentPhase: "draft", slot: "2026-07-28 07:45" },
+      { series: "seres", editionId: "05", path: "/p", currentPhase: "draft", slot: "2026-07-28 08:30" },
       T1,
     ).register;
     const { row } = upsertEdition(
@@ -123,7 +123,7 @@ describe("register — upsert", () => {
       { series: "seres", editionId: "05", path: "/p", currentPhase: "consistency-quality" },
       T2,
     );
-    assert.equal(row.slot, "2026-07-28 07:45");
+    assert.equal(row.slot, "2026-07-28 08:30");
     assert.equal(row.nextAction, "Step 2.5 — skeleton");
     assert.equal(row.title, "Da pipelinen brøt sammen");
   });
@@ -137,12 +137,12 @@ describe("register — upsert", () => {
         path: "/p",
         currentPhase: "draft",
         nextAction: "Step 4 — consistency",
-        slot: "2026-07-28 07:45",
+        slot: "2026-07-28 08:30",
       },
       T1,
     );
     assert.equal(row.nextAction, "Step 4 — consistency");
-    assert.equal(row.slot, "2026-07-28 07:45");
+    assert.equal(row.slot, "2026-07-28 08:30");
   });
 
   test("two editions of the same series are two rows", () => {