diff --git a/docs/hardening/log.md b/docs/hardening/log.md
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@@ -856,3 +856,86 @@ short-form hooks.
 - Disposition: **VERIFIED — NO CHANGE** (0 edits) · 0 deferrals · axes a/b/c/d all PASS.
 
 ---
+
+## Session 10 — Longform companion (`headless-review`)
+
+> S10 status: re-grounded STATE's predicates against the actual `headless-review.md` (248 lines, 13 KB)
+> BEFORE talk (jerndisiplin: assert-after-read). Class agreed S10 steps 1–2: **cold adversarial
+> review-orchestrator, NOT post-emitting** — it emits a consolidated review report + optional
+> `edition-state` persistence, never a feed post and never drafts prose; 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 (even further from feed-post than `newsletter`). The four archetype agents are
+> SHARED with `newsletter` Step 6.5 → S9 agent findings reused as baseline. All `file:line` below are
+> tool-grounded against the FINAL file (no edits this session → final == 1c31644).
+
+### /linkedin:headless-review — cold adversarial review package on a FROZEN long-form draft, NOT post-emitting
+
+**INTENT.** `headless-review` is the standalone surface of `newsletter` Step 6.5: read a frozen,
+publish-ready (or pivoted) long-form draft COLD — with NONE of the drafting session's framing-bias —
+through five independent archetypes and return direction-only flags, consolidated into one
+operator-gated report. Two isolation layers: fresh session (strongest, `:64–68`) + per-archetype
+subagent context (`:69–74`). The adversarial-independence layer the in-session gates structurally
+cannot be (`:30–48`).
+
+**SIMULATE (grounded persona-sim, anchored to the Step 3 cold fan-out).**
+- **Persona (operator):** KTG in a FRESH session running `--type all` on `<serie>/NN-utkast.md`.
+- **Walk:** Step 1 resolve-from-disk (draft → edition-state `currentArticle` fallback → ask-once
+  `:103–104`; contract 3-tier fallback ending at always-present `longform-quality-rules.md` `:111–114`;
+  personas = newsletter Step 1 chain `:116–118`) → Step 2 freeze (`cp` snapshot `:126`, live-draft
+  fallback if `cp` unavailable `:130–131`) → **Step 3 fan out 5 archetypes** (single message,
+  `:135–136`; 4 `linkedin-studio:`-namespaced types, persona-reviewer ×2 modes `:141–146`) →
+  **degradation gate** (`:161–164` "re-run that one archetype — do not paper over a missing reviewer
+  `[GATE]`") → Step 4 consolidate (operator gates, never auto-resolve flags `:168–169`/`:196–197`;
+  convergence marked `:200–202`) → Step 5 surface via `SendUserFile` (else `file://` `:208–210`) +
+  optional persist `articles.NN.headlessReview` (`:211–215`).
+- **Friction sought (the S2–S8 pattern: a missing buzzword gate / a missing fallback):** **NONE found.**
+  Not post-emitting → the category-correct quality bar is the reviewers grading against the writing
+  contract + the structured-return degradation gate, both present. Every fan-out call has a degradation
+  re-run path.
+
+**EVALUATE (4 axes).**
+- **(a) intention fidelity — PASS.** The 5-step flow (resolve → freeze → parallel fan-out → consolidate
+  → surface/persist) delivers the description's promise; primær artifact is the consolidated report
+  (`:171–198`), surfaced + optionally persisted (`:204–215`). `allowed-tools` (`:18–26`) complete and
+  fully used (Read/Glob/Grep · Bash freeze · AskUserQuestion ask-once · Task fan-out · Write report+state).
+- **(b) algorithm/format bar (long-form honesty, NOT feed-post predicates) — PASS.** Cold contract
+  (`:50–74`) nøktern: reviewers get a "deliberately starved context", exactly-what-they-get /
+  exactly-what-they-don't enumerated; two-layer isolation with honest caveats (Layer 1 "recommended …
+  strongest" not absolute; reload caveat for the v3.1.0 agents `:80–82`). Deliberate redundancy
+  (`fact-reviewer`↔`fact-checker`, `language-reviewer`↔`editorial` prose axis) disclosed as
+  on-purpose, not collapsed (`:234–237`). No feed-post predicate imposed.
+- **(c) quality rules (category-appropriate) — PASS.** Review quality enforced by (1) reviewers judging
+  against the writing contract (`:111–114`), (2) the degradation gate requiring structured/populated
+  returns, not a hedged paragraph (`:161–164`), (3) operator-gates-the-fold-in — the command recommends,
+  never rewrites/gates (`:168–169`/`:196–197`/`:210`), (4) convergence-as-signal (`:200–202`). No hollow
+  gate found.
+- **(d) agent-wiring + graceful degradation — PASS.** 4/4 invoked subagent types resolve to real
+  `agents/*.md` with matching frontmatter `name:`, all `subagent_type: linkedin-studio:`-namespaced
+  (content-reviewer · language-reviewer · fact-reviewer · persona-reviewer ×2 modes → "five
+  archetypes" `:5–6`/`:30–31`). 8/8 Reference Files (`:241–248`) exist. `articles.NN.headlessReview`
+  schema present + complete in `edition-state.template.json` (`:56–69`: frozenDraft · reviewers
+  {content,language,fact,personaResonance,personaConversion} · consolidatedReport · foldedIn · waived ·
+  status; ladder pending→run→folded `:29`). Degradation ×5: freeze `cp` fallback `:130` · draft-missing
+  ask-once `:104` · persona fallback `:117` · `[GATE]` re-run `:163–164` · output-default `:93` +
+  SendUserFile-else-`file://` `:208–210`.
+
+**HARDEN — NO CHANGE (verified clean).**
+- 0 edits. Borderline surfaced at talk: the freeze step (`:126`) assumes `review/` exists (no
+  `mkdir -p`). **Operator chose Alt A (no change).** Rationale: the freeze block is **byte-identical to
+  `newsletter` `:1050`** (S9-verified-clean), and `review/` is created by the render pipeline that
+  produces the draft (`build-html.mjs` → `./review/` newsletter `:1136`; skeleton/draft render
+  `:444`/`:580`); adding `mkdir -p` only here would drift from its S9-clean twin, and fixing both would
+  re-open S9 (out of S10 scope). The `cp`-unavailable fallback (`:130`) covers the degraded path loosely.
+- **Deferrals:** none. **Anti-gold-plating:** the `mkdir -p` robustness improvement is a NICE below the
+  axis-pass bar — left as the operator's logged decision (Alt A), not pursued.
+
+**VERIFY.**
+- `bash scripts/test-runner.sh` → `Passed: 81 · Failed: 0 · Warnings: 0`; counts **29/19/26** (+6
+  skills) unchanged (count/version-consistency guards inside the lint passed); `git status --porcelain`
+  empty → working tree byte-identical to `1c31644` (S9).
+- Predicates re-grounded against the final file: 4 namespaced subagent types (frontmatter `name:`
+  match) · 8/8 ref files exist · `headlessReview` schema `:56–69` · 5 degradation points · persona
+  chain = newsletter `:179–183` · "five archetypes" (wrapped) = 5 modes from 4 agents.
+- Disposition: **VERIFIED — NO CHANGE** (0 edits) · 0 deferrals · axes a/b/c/d all PASS.
+
+---