diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index aa74a6704..b16b6fedb 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -814,7 +814,7 @@ Write or change skill prose with `/write-skill` (edit ladder, levels, `gstack-sk
 3. The dynamic template discovery picks it up for every host render and for `gstack/llms.txt`. Two things it does not fill in: a row in `SKILL_REQUIREMENTS` in `lib/doctor-components.ts` (the doctor's `--for <skill>` table; `test/doctor-components.test.ts` fails on a skill directory without one, and the same gen run rerenders `bin/gstack-doctor-components.sh`), and the catalog rows readers find the skill through (README.md, AGENTS.md, `docs/skills.md`, `docs/PROJECT_STRUCTURE.md`, the root `SKILL.md.tmpl` router)
 4. Budget it: run `bun test/helpers/capture-context-budget.ts` and commit the refreshed `test/fixtures/context-budget.json` — the context-budget ratchet fails any skill without a ceiling; the catalog budget (`test/catalog-budget.test.ts`) fails until its cap is ratcheted by the protocol in its failure message, and the number is quoted in CLAUDE.md, this file and `docs/CONTRIBUTOR_REFERENCE.md`
 5. Commit `{skill}/SKILL.md` (and the generated `{skill}/sections/preamble.md` when the template's `preamble-tier` is 2 or higher), external host output is generated at setup time and gitignored
-6. Give it a row in the evidence ledger, `docs/inventory/evidence.json` ([ETHOS.md: 9. Earn Its Place](ETHOS.md#9-earn-its-place)): evidence that it helps on frontier models (`sources`, `models`, `prompt: preset`, `scope`, `masked: true`), or `status: untested` with its `reason`, a concrete `plan` (a `test/fixtures/skill-evals/<skill>/tasks.json` or an /eval-plan preregistration), an `owner` and a `measure_by` date. `test/inventory.test.ts` fails on a skill without a valid row; `bin/gstack-inventory --check` names the problem, and `bin/gstack-inventory` refreshes the dated snapshot in `docs/inventory.md`
+6. Give it a row in the evidence ledger, `docs/inventory/evidence.json` ([ETHOS.md: 9. Earn Its Place](ETHOS.md#9-earn-its-place)): evidence that it helps on frontier models (`sources`, `models`, `prompt: preset`, `scope`, `masked: true`, and `caveats` for any limits on the result), or `status: untested` with its `reason`, a concrete `plan` (a `test/fixtures/skill-evals/<skill>/tasks.json` or an /eval-plan preregistration), an `owner` and a `measure_by` date. `test/inventory.test.ts` fails on a skill without a valid row; `bin/gstack-inventory --check` names the problem, and `bin/gstack-inventory` refreshes the dated snapshot in `docs/inventory.md`
 
 ## Conductor workspaces
 
diff --git a/changelog.d/capy-gst-1370-review-helps-ledger.md b/changelog.d/capy-gst-1370-review-helps-ledger.md
new file mode 100644
index 000000000..7cff5797f
--- /dev/null
+++ b/changelog.d/capy-gst-1370-review-helps-ledger.md
@@ -0,0 +1 @@
+- **The evidence ledger records /review as helps, with its two caveats beside the status.** R2 at the after pin (gstack-evals #207, superseded by #211) measured /review with the contract Stop hook on Opus 5.5 at gstack 699a41cb: blocking recall 26.2% against 3.6% for plain Opus 5.5 with no gstack, +22.6 points (95% CI +11.0 to +33.7). The `review` row in `docs/inventory/evidence.json` now says helps, with its sources, scope and R48 KEEP. A new `caveats` field, allowed only on helps, no-effect and hurts rows, holds the result's limits, and `docs/inventory.md` and `gstack-skill-bill` print them beside the status: /review and the hook count as one unit (42 of 66 sessions ran the readers only after the hook blocked), and 41 of the suite's 42 bugs came from gstack-family reviews. The earlier review results stay under `prior`.
diff --git a/docs/inventory/evidence.json b/docs/inventory/evidence.json
index d85ce971a..b3fc00d77 100644
--- a/docs/inventory/evidence.json
+++ b/docs/inventory/evidence.json
@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "note": "R56 evidence ledger (ETHOS.md: 9. Earn Its Place). One row per inventory key (docs/inventory.md lists them); bin/gstack-inventory --check validates it and test/inventory.test.ts runs that check. Statuses and their required fields: helps, no-effect, hurts need sources, models (frontier per R54), prompt: preset, scope and masked: true, and no-effect and hurts also r48 {verdict, ref}; untested needs plan (a reference, or none only when grandfathered), and a new part also reason, owner and measure_by; safety needs reason. prior lists earlier results that do not count yet, with why. Seeded 2026-11-02 from GEVA-2's table (org-gstack-gbrain/research/gstack-part-evidence.json, gstack dac71371a); every row present at that base is grandfathered.",
+  "note": "R56 evidence ledger (ETHOS.md: 9. Earn Its Place). One row per inventory key (docs/inventory.md lists them); bin/gstack-inventory --check validates it and test/inventory.test.ts runs that check. Statuses and their required fields: helps, no-effect, hurts need sources, models (frontier per R54), prompt: preset, scope and masked: true, and no-effect and hurts also r48 {verdict, ref}; caveats lists a verdict's limits, shown beside its status; untested needs plan (a reference, or none only when grandfathered), and a new part also reason, owner and measure_by; safety needs reason. prior lists earlier results that do not count yet, with why. Seeded 2026-11-02 from GEVA-2's table (org-gstack-gbrain/research/gstack-part-evidence.json, gstack dac71371a); every row present at that base is grandfathered.",
   "seed_source": "org-gstack-gbrain/research/gstack-part-evidence.json (GEVA-156 for GST-915, 2026-11-02, gstack-evals main 409ff47)",
   "parts": {
     "autoplan": {
@@ -420,9 +420,26 @@
       "seed": "GEVA-2, 2026-11-02: retro: untested (never measured)"
     },
     "review": {
-      "status": "untested",
+      "status": "helps",
       "grandfathered": true,
-      "plan": "R2 (GEVA-2, 2026-11-02): gstack-evals wiki/plans/2026-11-02-geva-122-r2-amendment (#129, main eae6efc), told /review vs a no-gstack arm, Opus 5.5, preset on both arms",
+      "sources": [
+        "gstack-evals #207 (baa599a9) wiki/board/2026-11-04-geva-271-r2-after-pin-results",
+        "gstack-evals #211 (81daa79) wiki/board/2026-11-04-geva-281-r2-after-pin-results-home-field"
+      ],
+      "models": [
+        "claude-opus-5-5"
+      ],
+      "prompt": "preset",
+      "scope": "/review as a Claude Code user installs it at gstack 699a41cb (./setup --host claude), contract Stop hook included, told /review, against plain Opus 5.5 with no gstack; Claude Code CLI 2.1.314 on the claude_code preset; stacks-r1, 33 units, 42 blocking bugs, 2 passes: blocking recall 22/84 (26.2%) vs 3/84 (3.6%), +22.6 points [95% PR-clustered CI +11.0, +33.7], MDD 24.5",
+      "masked": true,
+      "r48": {
+        "verdict": "KEEP",
+        "ref": "gstack-evals #211, wiki/board/2026-11-04-geva-281-r2-after-pin-results-home-field (What we found: R48 KEEP, rr-decide.py KEEP)"
+      },
+      "caveats": [
+        "one unit: /review and the contract Stop hook were measured together, and neither gets credit alone; 42 of 66 gstack sessions ran the review readers only after the hook blocked them (24 unprompted), and that split is not randomized",
+        "home-field bias in gstack's favor: 41 of the 42 blocking bugs in stacks-r1 came from gstack-family reviews, so +22.6 may run high; a suite seeded from other reviewers' bugs would remove the bias (GEVA-2 lists it as future work)"
+      ],
       "prior": [
         {
           "ref": "gstack-evals #108 stacks round 1 review (GEVA-89), wiki/board/2026-11-01-geva-89-stacks-round-1-review-results",
@@ -450,11 +467,8 @@
           "note": "/review's prompts through the Messages API; Opus recall 44% vs 39% plain, 12 bugs"
         }
       ],
-      "r48": {
-        "verdict": "FIX-METHOD",
-        "ref": "org-gstack-gbrain/research/why-null-stacks-r1.md (GEVA-100); R2 is the fix"
-      },
-      "seed": "GEVA-2, 2026-11-02: review: measurement under way (R2)"
+      "seed": "GEVA-2, 2026-11-02: review: measurement under way (R2)",
+      "note": "R2 at the after pin: GEVA-271 under prereg #194 (amending #154), runs review-units-20261104T070239Z-cbff (gstack-full) and review-units-20261104T123631Z-3fb3 (none-rr); #211 (GEVA-281) supersedes #207's post with every number unchanged and adds the home-field limit. Until then, this row was untested with R48 FIX-METHOD (org-gstack-gbrain/research/why-null-stacks-r1.md, GEVA-100), plan R2 (gstack-evals #129). R2's first two attempts gave no outcome: GEVA-175 (procedure gate 10 of 19) and GEVA-229 (exposure smoke 2 of 3). masked: the no-gstack arm ran in the rig's Docker sandbox with no gstack install, and #207's read audit of its 66 transcripts found no read of ~/.capy/drive or ~/.local/share/gstack. Only Opus 5.5 was measured; GPT-6.1 Sol was not."
     },
     "scrape": {
       "status": "untested",
diff --git a/lib/inventory.ts b/lib/inventory.ts
index 9615e4841..ef05c437f 100644
--- a/lib/inventory.ts
+++ b/lib/inventory.ts
@@ -66,7 +66,7 @@ export const PRIOR_WHY: Record<string, string> = {
   'not-claude-code': 'ran outside Claude Code (Messages API, Codex or Capy)',
   'variant-only': 'variant against variant, no no-gstack arm',
 };
-const FIELDS = ['status', 'grandfathered', 'plan', 'prior', 'reason', 'owner', 'measure_by', 'sources', 'models', 'prompt', 'scope', 'masked', 'r48', 'seed', 'aliases', 'note'];
+const FIELDS = ['status', 'grandfathered', 'plan', 'prior', 'reason', 'owner', 'measure_by', 'sources', 'models', 'prompt', 'scope', 'masked', 'r48', 'caveats', 'seed', 'aliases', 'note'];
 
 export type LedgerCode =
   | 'LEDGER_PARSE' | 'LEDGER_KEY_MISSING' | 'LEDGER_KEY_EXTRA' | 'LEDGER_STATUS_INVALID' | 'LEDGER_FIELD_UNKNOWN'
@@ -75,7 +75,7 @@ export type LedgerCode =
   | 'LEDGER_REASON_MISSING' | 'LEDGER_OWNER_MISSING' | 'LEDGER_MEASURE_BY_MISSING' | 'LEDGER_PRIOR_INVALID' | 'LEDGER_FIELD_INVALID'
   | 'INVENTORY_SOURCE_MISSING' | 'INVENTORY_PART_MISSING';
 export interface LedgerProblem { key: string; code: LedgerCode; message: string }
-export interface LedgerEntry { status: Status; grandfathered?: boolean; plan?: string; prior?: Array<{ ref: string; why: string[]; note?: string }>; reason?: string; owner?: string; measure_by?: string; sources?: string[]; models?: string[]; prompt?: string; scope?: string; masked?: boolean; r48?: { verdict: string; ref: string }; seed?: string; aliases?: string[]; note?: string }
+export interface LedgerEntry { status: Status; grandfathered?: boolean; plan?: string; prior?: Array<{ ref: string; why: string[]; note?: string }>; reason?: string; owner?: string; measure_by?: string; sources?: string[]; models?: string[]; prompt?: string; scope?: string; masked?: boolean; r48?: { verdict: string; ref: string }; caveats?: string[]; seed?: string; aliases?: string[]; note?: string }
 export interface Ledger { parts: Record<string, LedgerEntry>; unmapped?: Array<{ row: string; why: string }>; [k: string]: unknown }
 
 const isObj = (v: unknown): v is Record<string, unknown> => typeof v === 'object' && v !== null && !Array.isArray(v);
@@ -100,6 +100,8 @@ export function validateEntry(key: string, entry: unknown): LedgerProblem[] {
     add('LEDGER_PRIOR_INVALID', `prior needs [{ref, why: [...]}] with why from: ${Object.keys(PRIOR_WHY).join(', ')}`);
   if (entry.aliases !== undefined && !(Array.isArray(entry.aliases) && entry.aliases.length > 0 && entry.aliases.every(str))) add('LEDGER_FIELD_INVALID', 'aliases needs a list of names');
   const status = entry.status;
+  if (entry.caveats !== undefined && !((status === 'helps' || status === 'no-effect' || status === 'hurts') && Array.isArray(entry.caveats) && entry.caveats.length > 0 && entry.caveats.every(str)))
+    add('LEDGER_FIELD_INVALID', 'caveats is a list of limits on a helps, no-effect or hurts result');
   if (status === 'helps' || status === 'no-effect' || status === 'hurts') {
     if (!Array.isArray(entry.sources) || !entry.sources.length || !entry.sources.every(str)) add('LEDGER_SOURCES_MISSING', `${status} needs sources: one or more run ids or results files`);
     if (!frontierModels(entry.models)) add('LEDGER_MODELS_NOT_FRONTIER', `models must include ${FRONTIER_MODELS.join(' or ')} plus at most one named low-cost primary, never Haiku or Sonnet (R54)`);
@@ -164,7 +166,7 @@ export const keyOf = (name: string) => (name !== 'gstack-upgrade' && name.starts
 export function evidenceRef(e: LedgerEntry): string {
   if (e.status === 'untested') return `plan: ${e.plan}${e.grandfathered ? ' (grandfathered)' : ` (owner ${e.owner}, measure by ${e.measure_by})`}`;
   if (e.status === 'safety') return `reason: ${e.reason}`;
-  return `sources: ${(e.sources ?? []).join(', ')}${e.r48 ? `; R48 ${e.r48.verdict}` : ''}`;
+  return `sources: ${(e.sources ?? []).join(', ')}${e.r48 ? `; R48 ${e.r48.verdict}` : ''}${e.caveats ? `; caveats: ${e.caveats.join('; ')}` : ''}`;
 }
 
 /** gstack-skill-bill's EVIDENCE line for one skill folder in a gstack checkout. */
diff --git a/test/inventory.test.ts b/test/inventory.test.ts
index a26e5e64d..958d75e8d 100644
--- a/test/inventory.test.ts
+++ b/test/inventory.test.ts
@@ -9,7 +9,7 @@ import * as fs from 'node:fs';
 import * as os from 'node:os';
 import * as path from 'node:path';
 import { discoverTemplates } from '../scripts/discover-skills';
-import { DISPATCHES, LEDGER_PATH, ROOT_KEY, SHARED_KEYS, SHARED_PARTS, installReason, inventoryKeys, keyOf, validateEntry, validateLedger } from '../lib/inventory';
+import { DISPATCHES, LEDGER_PATH, ROOT_KEY, SHARED_KEYS, SHARED_PARTS, evidenceRef, installReason, inventoryKeys, keyOf, validateEntry, validateLedger } from '../lib/inventory';
 
 const ROOT = path.resolve(import.meta.dir, '..');
 const BIN = path.join(ROOT, 'bin', 'gstack-inventory');
@@ -129,6 +129,16 @@ describe('the per-status schema', () => {
     expect(codes('a', { status: 'safety', reason: 'x', aliases: [] })).toEqual(['LEDGER_FIELD_INVALID']);
     expect(codes('a', { status: 'safety', reason: 'x', aliases: ['other-name'] })).toEqual([]);
   });
+
+  test('caveats is a list of limits on a verdict row, shown beside its sources', () => {
+    const caveats = ['measured with the hook', 'suite seeded from its own reviews'];
+    expect(codes('a', { status: 'helps', ...VERDICT, caveats })).toEqual([]);
+    expect(codes('a', { status: 'helps', ...VERDICT, caveats: [] })).toEqual(['LEDGER_FIELD_INVALID']);
+    expect(codes('a', { status: 'helps', ...VERDICT, caveats: 'one string' })).toEqual(['LEDGER_FIELD_INVALID']);
+    expect(codes('a', { status: 'helps', ...VERDICT, caveats: [''] })).toEqual(['LEDGER_FIELD_INVALID']);
+    expect(codes('a', { status: 'untested', grandfathered: true, plan: 'none', caveats })).toEqual(['LEDGER_FIELD_INVALID']);
+    expect(evidenceRef({ status: 'helps', ...VERDICT, caveats } as any)).toBe('sources: gstack-evals run r9 results.json; caveats: measured with the hook; suite seeded from its own reviews');
+  });
 });
 
 /** A small gstack-shaped tree: a root skill, two skills, the shared-part files and the cited dispatch sources. */