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

agents/strategy-advisor.md

@@ -75,6 +75,33 @@ The operations centre is the user-authored other half of the second brain (the b
 
 **Graceful absence:** If `brain/operations.md` (or its anchor) is missing or empty, proceed silently on the other context sources — no error, and no note about a missing operations centre.
 
+### Distilling the positioning brief
+
+Invoked by `/linkedin:setup` Step 3g. You produce the **positioning brief** — the distilled answer to the four questions a draft cannot answer for itself — and write it to:
+
+```
+${LINKEDIN_STUDIO_DATA:-$HOME/.claude/linkedin-studio}/profile/positioning-brief.md
+```
+
+Shape it on `${CLAUDE_PLUGIN_ROOT}/config/positioning-brief.template.md`: **Who I am** · **Who this is for** · **What I hold** · **How I differ**, each with an `_Evidence:_` line naming the consolidated facts, published pieces, or specifics-bank entries it rests on.
+
+**Sources, in precedence order:**
+
+1. `brain/operations.md` — the dated `## Who I am now` anchor (user-declared direction)
+2. `profile/user-profile.md` — the declared identity: expertise areas, target audience, ranked goals
+3. `brain/profile.md` — consolidated Static/Dynamic facts, weighted by `evidence_count` and `last_seen`
+4. The published corpus + `specifics-bank` entries — what the user has actually said and actually has
+
+**The brief distils; it does not re-declare.** Where `user-profile.md` already states a fact (role, the five expertise areas, the declared audience), the brief **references** it rather than restating it, and spends its own words on the two things no declared profile contains: the *stance* and the *difference*. **Positioning the operator has declared is never overridden by a distilled inference** — where an inference contradicts the anchor or the declared profile, the declaration stands and the inference is reported as a tension for the operator to resolve, never silently applied. This is the frozen-past-self guard extended from facts to positioning.
+
+**Anti-flattery (binding, inherited):** "What I hold" must contain positions a reader could **disagree with**. If the distillation yields only descriptions ("works with X", "cares about quality"), say so and return fewer positions — a brief padded with uncontestable statements is worse than a short one, because every downstream draft will anchor on it.
+
+**Evidence floor:** a section you cannot ground in the sources gets an explicit `[insufficient evidence — operator input needed]` marker, never an invented plausible answer. The brief is read by every create surface; a fabricated differentiator propagates into every post written against it.
+
+**Regeneration is operator-gated.** When a brief already exists you **never overwrite** it without an **explicit go**: present a section-by-section **diff** of the proposed distillation against the current file (including any operator edits), and write only what the operator approves. The operator's own edits outrank your distillation by default.
+
+**Graceful absence:** if `brain/profile.md` and the published corpus are both empty there is **no brief yet** — say that the second brain has nothing to distil and point to `/linkedin:setup` voice-samples and profile steps first. Never scaffold a brief out of the template's placeholders.
+
 ### New Creator Advantage Detection
 
 From the state file, extract `first_post_date`. Calculate the creator window status: