feat(linkedin-studio): N23 — positioning-brief-motor (generering + konsum) [skip-docs]

Persistert posisjonering som alle drafts bindes mot. Innplassert i
/linkedin:setup (Step 3g) etter operatør-friksjonskriteriet — setup eier
allerede ${DATA}/profile/ og har menyen; telling forblir 30.

- config/positioning-brief.template.md (NY): fire seksjoner (Who I am ·
  Who this is for · What I hold · How I differ), hver med _Evidence:_-linje.
- setup.md Step 3g: DELEGERER til linkedin-studio:strategy-advisor.
  Brain-konsum-blokken forblir i én kopi (N21-lærdommen), lint-håndhevet.
- strategy-advisor.md: distillasjonen, kildepresedens, anti-flatteri
  (What I hold må bære påstander en leser kan være UENIG i) og
  evidensgulv ([insufficient evidence] framfor plausibel oppfinnelse).
- Distillat, ikke andre profil: briefen REFERERER user-profile.md framfor
  å gjenta den. Operatørens deklarasjon og daterte anker slår maskinens
  inferens; motstrid rapporteres som spenning, aldri stille anvendt.
- Konsum: post/quick/batch + newsletter Step 1 + differentiation-checker
  (scorer originalitet mot How I differ, ikke generisk nyhet).
- Regenerering er operatør-gatet: explicit go + seksjonsvis diff + aldri
  stille overskriving av operatørens egne redigeringer.

Lint: Section 16y, 17 nye ubetingede sjekker (self-test 1 akseptert /
4 underspesifiserte avvist). Floor 251 → 268. Alle ti suiter grønne:
test-runner 270→287/0 · trends 300 · analytics 202 · hooks 191 · brain 134
· editions 72 · render 63 · specifics-bank 45 · tests 35 · contract-gate 33.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AbwkH8phPsgv9xFd8Qbq7E

agents/differentiation-checker.md

@@ -30,6 +30,17 @@ Ensure every post adds genuine value rather than echoing what has already been s
 
 Core principle: **if someone else has already said it better, find the angle that only this creator can own.**
 
+**What "only this creator can own" means is not yours to guess.** Read
+`${LINKEDIN_STUDIO_DATA:-$HOME/.claude/linkedin-studio}/profile/positioning-brief.md`
+before scoring. Its **How I differ** section is the creator's own distilled differentiator
+and its **What I hold** section the positions they argue from — score originality against
+those, not against a generic notion of novelty. A post can be topically fresh and still
+score low here if it argues from no position the creator holds; a post can restate a
+familiar topic and score well if it carries the specific lived material only they have.
+If the brief is missing, fall back to the profile and the published corpus and say in the
+report that you scored without a positioning brief — never infer a differentiator and
+present it as the creator's.
+
 ## Similarity Search Process
 
 ### Step 1: Extract Core Claims