docs(linkedin-studio): S9 harden newsletter — verified clean, no change (4 axes PASS)

newsletter is a guided/stateful long-form orchestrator, NOT post-emitting,
so the feed-post predicates (hook 110-140, 1,200-1,800 band, no-body-link)
do not apply — imposing them would be the S4/video category error the
command itself rejects (:38-42). Ran the 7 agreed S9 predicates
tool-grounded against the final file (1594 lines, 16 phases):

- 8 invoked subagents all resolve, all linkedin-studio:-namespaced
- render/queue helpers exist; queueAdd 8-arg signature matches the call (:1486)
- 9 plugin-root ref/template files exist
- phase strings: _doc.phases (16) <-> resumption table (16) diff IDENTICAL
- graceful degradation present everywhere (voice/persona, mcp-image,
  exit-codes x4, optional config, fan-out gates x3)
- native-newsletter section honest; sourcing note + cited file both present

4-axis verdict: a/b/c/d all PASS, 0 gaps, 0 deferrals -> NO CHANGE.

Gate: test-runner 81/0/0 · counts 29/19/26 unchanged · working tree
byte-identical to 8babcf7 (S8); only docs/hardening/log.md added.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016qgzo6rxthw7KuxHjn5vyE

docs/hardening/log.md

@@ -785,3 +785,74 @@ orchestration (subagent targets + 5 node helpers resolve; graceful degradation).
   axes a/b/d PASS.
 
 ---
+
+## Session 9 — Longform orchestrator (`newsletter`)
+
+> S9 status: re-grounded STATE's 7 S9 predicates against the actual `newsletter.md` (1594 lines, 16
+> phases) BEFORE talk (jerndisiplin: assert-after-read). Class agreed S9 steps 1–2: **guided/stateful
+> long-form orchestrator, NOT post-emitting** — the feed-post predicates (hook 110–140, 1,200–1,800
+> band, no-body-link) do NOT apply; imposing them would be the S4/video category error the command
+> itself already rejects (`:38–42`). All `file:line` below are tool-grounded against the FINAL file
+> (no edits this session → final == 52e888a).
+
+### /linkedin:newsletter — long-form edition end-to-end, 16-phase stateful pipeline, NOT post-emitting
+
+**INTENT.** `newsletter` is the Longform orchestrator: take an edition (newsletter / essay / series
+article) from load → calibration → verified research → skeleton+spine gates BEFORE prose → full draft
+→ consistency/quality+voice-scrub → fact-check → editorial craft gate → persona sweep → headless
+adversarial review → visual assets → LOCK (POST.html) → hook-gate → scheduling. Multi-session with a
+maintained `edition-state.json`. Long-form quality is enforced by the **pipeline phases**, not
+short-form hooks.
+
+**SIMULATE (grounded persona-sim, anchored to Step 6.5 headless fan-out).**
+- **Persona (operator):** KTG producing a series edition; primær reader chosen in Step 1.
+- **Walk:** Step 0 load (voice/persona graceful `:258`) → … → Step 6 persona sweep PASS → **Step 6.5
+  freeze → fan out 5 cold archetypes** (`:1062–1069`, single message, all `linkedin-studio:`-namespaced,
+  foreground per principle 4; background loses Task `:79`) → **degradation gate** (`:1084–1086` "do not
+  proceed with a missing reviewer `[GATE]`") → consolidate via `SendUserFile` → Step 7.5 visual assets
+  (mcp-image not a hard dependency, external `cover-raw.png` fallback `:1222–1230`) → Step 8 LOCK
+  (`build-linkedin.mjs` → `linkedin/NN/POST.html`, exit-code N3 `:1388`) → Step 10 `queueAdd` (`:1486`).
+- **Friction sought (the S2–S8 pattern: a missing buzzword gate / a missing fallback):** **NONE found.**
+  The category-correct equivalent of the short-form buzzword gate is the de-AI/voice-scrub + editorial +
+  language-reviewer gates, all present and wired. Every fan-out has a structured-return degradation gate.
+
+**EVALUATE (4 axes).**
+- **(a) intention fidelity — PASS.** The 16-phase pipeline delivers the description's promise; primær
+  artifact `POST.html` is produced end-to-end at Step 8 lock (`:1379–1395`) with exit-code verification.
+- **(b) algorithm/format bar (long-form honesty, NOT feed-post predicates) — PASS.** Native-newsletter §
+  (`:1508–1569`) is nøktern: "sells nothing", notification dedup not oversold ("not three guaranteed
+  touchpoints"), cold-start not inflated ("0→9K in 7 days were not cold starts"), downsides disclosed
+  (non-exportable / no-canonical / no-analytics / decay), sourcing note (`:1564`) separates LinkedIn
+  help-docs (high conf.) from practitioner ranges (medium) + flags the contested email-dedup; citation
+  `docs/remediation/research/03-coverage-gap-specs.md` §D5 exists (225 lines, §D5 ×8 — not dangling).
+- **(c) quality rules (category-appropriate) — PASS.** Long-form quality is enforced by the pipeline
+  gates (skeleton 2.5 · spine 3a · consistency+voice-scrub 4 · fact-check 5 · editorial 5.5 · persona 6
+  · headless 6.5 · hook 9), all present + wired. Short-form hooks correctly NOT imposed (`:38–42`); no
+  hollow gate found.
+- **(d) agent-wiring + graceful degradation — PASS.** All 8 invoked subagents resolve to real
+  `agents/*.md`, all `subagent_type: linkedin-studio:`-namespaced (persona-reviewer ×5, fact-checker ×2,
+  voice-scrubber, language-reviewer, fact-reviewer, editorial-reviewer, content-reviewer,
+  content-repurposer). Render/queue helpers exist; `queueAdd(id, draftPath, schedDate, schedTime,
+  pillar, format, hookPreview, charCount)` 8-arg signature (qm`:63`) matches the call (`:1486`). All 9
+  plugin-root ref/template files (`:1575–1594`) exist. Phase strings: `_doc.phases` (16) ↔ resumption
+  table (16) `diff` IDENTICAL. Degradation: voice/persona `:258` · mcp-image `:1222–1230` · exit-codes
+  ×4 (`:443/580/1144/1388`) · optional config+delingstekst `:1373–1377` · fan-out gates ×3
+  (`:340/789/1086`).
+
+**HARDEN — NO CHANGE (verified clean).**
+- 0 edits. `newsletter` is among the most iterated commands (v2.0→v4.1 hardened the long-form gates
+  across multiple production runs: Seres, Del 4 / Endring 9), and it shows: every axis passes with no
+  surgical opportunity at or below the axis-pass bar.
+- **Deferrals:** none. **Anti-gold-plating:** no NICE-only polish pursued beyond axis-pass (stopping
+  rule, brief §). The native-newsletter follow-up noted in S2 STATE (reference-consistency for the
+  separate `video.md`/`linkedin-formats.md` 30 % surface) is NOT this command's surface — left in the
+  open-follow-ups list, not touched here.
+
+**VERIFY.**
+- `bash scripts/test-runner.sh` → `Passed: 81 · Failed: 0 · Warnings: 0`; counts **29/19/26** (+6
+  skills) unchanged; `git status --porcelain` empty → working tree byte-identical to `52e888a` (S8).
+- Phase-string diff reproduced: `_doc.phases` ids vs resumption-table `currentPhase` ids → IDENTICAL,
+  16↔16, in order.
+- Disposition: **VERIFIED — NO CHANGE** (0 edits) · 0 deferrals · axes a/b/c/d all PASS.
+
+---