diff --git a/.loopover.yml.example b/.loopover.yml.example
index cd65173dc7..787b76d37a 100644
--- a/.loopover.yml.example
+++ b/.loopover.yml.example
@@ -202,12 +202,15 @@ gate:
     minScore: null
 
   # Oversized-PR gate. A PR at/above EITHER the file-count or line-count threshold
-  # (engine defaults, not configurable here) gets a manual-review HOLD finding —
-  # never a hard blocker; mode only turns this hold signal on or off.
-  # off | advisory | block. Default: off. Config-as-code only — no DB column or
-  # dashboard toggle; this can only be set here.
+  # gets a manual-review HOLD finding — never a hard blocker; mode only turns this
+  # hold signal on or off. off | advisory | block. Default: off. Config-as-code
+  # only — no DB column or dashboard toggle; this can only be set here.
   size:
     mode: off
+    # File-count threshold. Positive integer. Default: 10.
+    # maxFiles: 10
+    # Changed (added+deleted) line-count threshold. Positive integer. Default: 1000.
+    # maxLines: 1000
 
   # Lockfile-tamper-risk gate. Scans a changed package-lock.json diff for a
   # resolved/integrity value that changed WITHOUT the same package's version
diff --git a/apps/loopover-ui/public/openapi.json b/apps/loopover-ui/public/openapi.json
index 366b62ea0a..125203c2b6 100644
--- a/apps/loopover-ui/public/openapi.json
+++ b/apps/loopover-ui/public/openapi.json
@@ -9659,6 +9659,12 @@
                 "appSlug"
               ]
             }
+          },
+          "sizeGateMaxFiles": {
+            "type": "number"
+          },
+          "sizeGateMaxLines": {
+            "type": "number"
           }
         },
         "required": [
diff --git a/config/examples/loopover.full.yml b/config/examples/loopover.full.yml
index 6dc4672b75..924293ff2d 100644
--- a/config/examples/loopover.full.yml
+++ b/config/examples/loopover.full.yml
@@ -216,12 +216,15 @@ gate:
     minScore: null
 
   # Oversized-PR gate. A PR at/above EITHER the file-count or line-count threshold
-  # (engine defaults, not configurable here) gets a manual-review HOLD finding —
-  # never a hard blocker; mode only turns this hold signal on or off.
-  # off | advisory | block. Default: off. Config-as-code only — no DB column or
-  # dashboard toggle; this can only be set here.
+  # gets a manual-review HOLD finding — never a hard blocker; mode only turns this
+  # hold signal on or off. off | advisory | block. Default: off. Config-as-code
+  # only — no DB column or dashboard toggle; this can only be set here.
   size:
     mode: off
+    # File-count threshold. Positive integer. Default: 10.
+    # maxFiles: 10
+    # Changed (added+deleted) line-count threshold. Positive integer. Default: 1000.
+    # maxLines: 1000
 
   # Lockfile-tamper-risk gate. Scans a changed package-lock.json diff for a
   # resolved/integrity value that changed WITHOUT the same package's version
diff --git a/packages/loopover-engine/src/advisory/gate-advisory.ts b/packages/loopover-engine/src/advisory/gate-advisory.ts
index aac5148f64..f97630379a 100644
--- a/packages/loopover-engine/src/advisory/gate-advisory.ts
+++ b/packages/loopover-engine/src/advisory/gate-advisory.ts
@@ -101,8 +101,13 @@ export type GateCheckPolicy = {
   /** PR-size HOLD (#gate-size). When set (advisory/block), a PR with >= sizeGateMaxFiles changed files OR
    *  >= sizeGateMaxLines changed (added+deleted) lines that would OTHERWISE pass is HELD for manual review — a
    *  neutral gate → "manual" verdict, never auto-merged and never a hard failure. Defaults off; thresholds default
-   *  to 10 files / 1000 lines. This is a HOLD (advisory dry-run friendly), not a close. */
+   *  to 10 files / 1000 lines when sizeGateMaxFiles/sizeGateMaxLines are unset. This is a HOLD (advisory dry-run
+   *  friendly), not a close. */
   sizeGateMode?: GateRuleMode | undefined;
+  /** PR-size HOLD file-count threshold (#gate-size). `null`/undefined ⇒ the 10-file default. */
+  sizeGateMaxFiles?: number | null | undefined;
+  /** PR-size HOLD changed-line-count threshold (#gate-size). `null`/undefined ⇒ the 1000-line default. */
+  sizeGateMaxLines?: number | null | undefined;
   /** Lockfile-tamper-risk gate (#2563). When `block`, a `lockfile_tamper_risk` finding (produced by
    *  review/lockfile-tamper.ts when a changed package-lock.json's resolved/integrity value changed without a
    *  matching package.json version bump, or points off the npm registry) becomes a hard blocker. Defaults to
@@ -388,16 +393,16 @@ function buildSizeHoldFinding(policy: GateCheckPolicy): AdvisoryFinding | null {
   if (files === undefined || files === null) files = 0;
   let lines = policy.changedLineCount;
   if (lines === undefined || lines === null) lines = 0;
-  if (
-    files < SIZE_HOLD_DEFAULT_MAX_FILES &&
-    lines < SIZE_HOLD_DEFAULT_MAX_LINES
-  )
-    return null;
+  let maxFiles = policy.sizeGateMaxFiles;
+  if (maxFiles === undefined || maxFiles === null) maxFiles = SIZE_HOLD_DEFAULT_MAX_FILES;
+  let maxLines = policy.sizeGateMaxLines;
+  if (maxLines === undefined || maxLines === null) maxLines = SIZE_HOLD_DEFAULT_MAX_LINES;
+  if (files < maxFiles && lines < maxLines) return null;
   return {
     code: "oversized_pr",
     severity: "warning",
     title: "Large change — held for manual review",
-    detail: `This PR changes ${files} file(s) / ${lines} line(s) (hold threshold: ${SIZE_HOLD_DEFAULT_MAX_FILES} files or ${SIZE_HOLD_DEFAULT_MAX_LINES} lines).`,
+    detail: `This PR changes ${files} file(s) / ${lines} line(s) (hold threshold: ${maxFiles} files or ${maxLines} lines).`,
     action: "Split this into smaller, focused PRs, or a maintainer reviews and merges it manually.",
   };
 }
diff --git a/packages/loopover-engine/src/focus-manifest.ts b/packages/loopover-engine/src/focus-manifest.ts
index 1eeabda074..3567cd5916 100644
--- a/packages/loopover-engine/src/focus-manifest.ts
+++ b/packages/loopover-engine/src/focus-manifest.ts
@@ -102,6 +102,8 @@ export type FocusManifestGateConfig = {
   slopMinScore: number | null;
   slopAiAdvisory: boolean | null;
   sizeMode: GateRuleMode | null;
+  sizeMaxFiles: number | null;
+  sizeMaxLines: number | null;
   /** `gate.lockfileIntegrity` (#2563): off|advisory|block, off by default. When not off, a changed
    *  `package-lock.json` diff is scanned for a `resolved`/`integrity` change unaccompanied by a matching
    *  `package.json` version bump, or a `resolved` URL outside `registry.npmjs.org` — a `lockfile_tamper_risk`
@@ -981,6 +983,8 @@ const EMPTY_GATE_CONFIG: FocusManifestGateConfig = {
   slopMinScore: null,
   slopAiAdvisory: null,
   sizeMode: null,
+  sizeMaxFiles: null,
+  sizeMaxLines: null,
   lockfileIntegrityMode: null,
   aiReviewMode: null,
   aiReviewByok: null,
@@ -1384,6 +1388,8 @@ function parseGateConfig(value: JsonValue | undefined, warnings: string[]): Focu
     slopMinScore: normalizeOptionalScore(slopRecord?.minScore, "gate.slop.minScore", warnings),
     slopAiAdvisory: normalizeOptionalBoolean(slopRecord?.aiAdvisory, "gate.slop.aiAdvisory", warnings),
     sizeMode: normalizeOptionalGateMode(sizeRecord?.mode, "gate.size.mode", warnings),
+    sizeMaxFiles: normalizeOptionalPositiveInteger(sizeRecord?.maxFiles, "gate.size.maxFiles", warnings),
+    sizeMaxLines: normalizeOptionalPositiveInteger(sizeRecord?.maxLines, "gate.size.maxLines", warnings),
     lockfileIntegrityMode: normalizeOptionalGateMode(record.lockfileIntegrity, "gate.lockfileIntegrity", warnings),
     aiReviewMode: normalizeOptionalGateMode(aiReviewRecord?.mode, "gate.aiReview.mode", warnings),
     aiReviewByok: normalizeOptionalBoolean(aiReviewRecord?.byok, "gate.aiReview.byok", warnings),
@@ -1450,6 +1456,8 @@ function parseGateConfig(value: JsonValue | undefined, warnings: string[]): Focu
     gate.slopMinScore !== null ||
     gate.slopAiAdvisory !== null ||
     gate.sizeMode !== null ||
+    gate.sizeMaxFiles !== null ||
+    gate.sizeMaxLines !== null ||
     gate.lockfileIntegrityMode !== null ||
     gate.aiReviewMode !== null ||
     gate.aiReviewByok !== null ||
@@ -1499,7 +1507,13 @@ export function gateConfigToJson(gate: FocusManifestGateConfig): JsonValue {
     if (gate.readinessMinScore !== null) readiness.minScore = gate.readinessMinScore;
     out.readiness = readiness;
   }
-  if (gate.sizeMode !== null) out.size = { mode: gate.sizeMode };
+  if (gate.sizeMode !== null || gate.sizeMaxFiles !== null || gate.sizeMaxLines !== null) {
+    const size: Record<string, JsonValue> = {};
+    if (gate.sizeMode !== null) size.mode = gate.sizeMode;
+    if (gate.sizeMaxFiles !== null) size.maxFiles = gate.sizeMaxFiles;
+    if (gate.sizeMaxLines !== null) size.maxLines = gate.sizeMaxLines;
+    out.size = size;
+  }
   if (gate.lockfileIntegrityMode !== null) out.lockfileIntegrity = gate.lockfileIntegrityMode;
   if (gate.slopMode !== null || gate.slopMinScore !== null || gate.slopAiAdvisory !== null) {
     const slop: Record<string, JsonValue> = {};
diff --git a/packages/loopover-engine/src/predicted-gate.ts b/packages/loopover-engine/src/predicted-gate.ts
index 0523ea797c..921924d9db 100644
--- a/packages/loopover-engine/src/predicted-gate.ts
+++ b/packages/loopover-engine/src/predicted-gate.ts
@@ -308,6 +308,8 @@ export function buildPredictedGateVerdict(args: {
     // never sent to this predictor, so the size hold can only be predicted from file count (disclosed in the
     // note above) — never claim a line count this function has no way to know.
     sizeGateMode: gate.sizeMode ?? undefined,
+    sizeGateMaxFiles: gate.sizeMaxFiles ?? undefined,
+    sizeGateMaxLines: gate.sizeMaxLines ?? undefined,
     ...(hasChangedPaths
       ? {
           changedFileCount: changedPaths.length,
diff --git a/packages/loopover-engine/src/types/manifest-deps-types.ts b/packages/loopover-engine/src/types/manifest-deps-types.ts
index 57f5ee0cf4..9491e554ba 100644
--- a/packages/loopover-engine/src/types/manifest-deps-types.ts
+++ b/packages/loopover-engine/src/types/manifest-deps-types.ts
@@ -185,9 +185,16 @@ export type RepositorySettings = {
    *  only, applies to every author like every blocker). Default `off` — opt-in via .loopover.yml. */
   slopGateMode: GateRuleMode;
   /** PR-size manual-review HOLD (#gate-size). `off` (default/absent) = no size hold; `advisory`/`block` = a PR with
-   *  >= 10 changed files OR >= 1000 changed (added+deleted) lines that would otherwise pass is HELD for manual review
-   *  (neutral gate → "manual" verdict), never auto-merged and never a hard failure. Opt-in via `gate.size.mode`. */
+   *  >= sizeGateMaxFiles changed files OR >= sizeGateMaxLines changed (added+deleted) lines that would otherwise
+   *  pass is HELD for manual review (neutral gate → "manual" verdict), never auto-merged and never a hard failure.
+   *  Opt-in via `gate.size.mode`. */
   sizeGateMode?: GateRuleMode | undefined;
+  /** PR-size HOLD file-count threshold (#gate-size), config-only — set via `.loopover.yml gate.size.maxFiles`.
+   *  `undefined` ⇒ the 10-file default. */
+  sizeGateMaxFiles?: number | undefined;
+  /** PR-size HOLD changed-line-count threshold (#gate-size), config-only — set via `.loopover.yml
+   *  gate.size.maxLines`. `undefined` ⇒ the 1000-line default. */
+  sizeGateMaxLines?: number | undefined;
   /** Lockfile-tamper-risk gate (#2563). `off` (default/absent) = no scan; `advisory`/`block` = a changed
    *  `package-lock.json` whose diff changes a `resolved`/`integrity` value WITHOUT the same package's version
    *  changing in a changed `package.json`, or whose `resolved` URL points outside `registry.npmjs.org`, produces
diff --git a/packages/loopover-engine/src/types/predicted-gate-types.ts b/packages/loopover-engine/src/types/predicted-gate-types.ts
index cbdd07bb53..ba2d8b2ef8 100644
--- a/packages/loopover-engine/src/types/predicted-gate-types.ts
+++ b/packages/loopover-engine/src/types/predicted-gate-types.ts
@@ -292,6 +292,8 @@ export type FocusManifestGateConfig = {
   slopMinScore: number | null;
   slopAiAdvisory: boolean | null;
   sizeMode: GateRuleMode | null;
+  sizeMaxFiles: number | null;
+  sizeMaxLines: number | null;
   lockfileIntegrityMode: GateRuleMode | null;
   aiReviewMode: GateRuleMode | null;
   aiReviewByok: boolean | null;
diff --git a/scripts/check-docs-drift.mjs b/scripts/check-docs-drift.mjs
index 2a62945439..b3fd46d913 100644
--- a/scripts/check-docs-drift.mjs
+++ b/scripts/check-docs-drift.mjs
@@ -140,6 +140,8 @@ export const SETTINGS_ALIAS_MANIFEST = [
   { field: "aiReviewOnMerge", aliases: ["onMerge"] },
   { field: "aiReviewReviewers", aliases: ["reviewers:"] },
   { field: "requireFreshRebaseWindowMinutes", aliases: ["requireFreshRebaseWindow"] },
+  { field: "sizeGateMaxFiles", aliases: ["maxFiles"] },
+  { field: "sizeGateMaxLines", aliases: ["maxLines"] },
 ];
 
 /** camelCase -> snake_case, matching the casing convention `.loopover.yml`'s `review:` block (and everything
diff --git a/src/openapi/schemas.ts b/src/openapi/schemas.ts
index 2337271c88..efea7af2fb 100644
--- a/src/openapi/schemas.ts
+++ b/src/openapi/schemas.ts
@@ -681,6 +681,8 @@ export const RepositorySettingsSchema = z
     qualityGateMinScore: z.number().nullable().optional(),
     slopGateMode: z.enum(["off", "advisory", "block"]),
     sizeGateMode: z.enum(["off", "advisory", "block"]).optional(),
+    sizeGateMaxFiles: z.number().optional(),
+    sizeGateMaxLines: z.number().optional(),
     lockfileIntegrityGateMode: z.enum(["off", "advisory", "block"]).optional(),
     claGateMode: z.enum(["off", "advisory", "block"]).optional(),
     claConsentPhrase: z.string().nullable().optional(),
diff --git a/src/queue/gate-checks.ts b/src/queue/gate-checks.ts
index 2106ddc783..378885eadb 100644
--- a/src/queue/gate-checks.ts
+++ b/src/queue/gate-checks.ts
@@ -99,10 +99,12 @@ export function gateCheckPolicy(
     slopGateMinScore: settings.slopGateMinScore ?? null,
     slopRisk: slopRisk ?? null,
     confirmedContributor: confirmedContributorForPack,
-    // PR-size + guardrail manual-review HOLD (#gate-size / #gate-guardrail): the MODE comes from config; the
-    // thresholds default to 10 files / 1000 lines (advisory.ts constants); the live counts + guardrail-hit come from
-    // the per-PR sizeContext threaded by the caller.
+    // PR-size + guardrail manual-review HOLD (#gate-size / #gate-guardrail): the mode AND thresholds come from
+    // config (`gate.size.mode`/`maxFiles`/`maxLines`), falling back to advisory.ts's 10-file/1000-line constants
+    // when unset; the live counts + guardrail-hit come from the per-PR sizeContext threaded by the caller.
     sizeGateMode: settings.sizeGateMode,
+    sizeGateMaxFiles: settings.sizeGateMaxFiles ?? null,
+    sizeGateMaxLines: settings.sizeGateMaxLines ?? null,
     lockfileIntegrityGateMode: settings.lockfileIntegrityGateMode,
     changedFileCount: sizeContext?.changedFileCount ?? null,
     changedLineCount: sizeContext?.changedLineCount ?? null,
diff --git a/src/rules/advisory.ts b/src/rules/advisory.ts
index a4ae3d15b9..bc9a76c02c 100644
--- a/src/rules/advisory.ts
+++ b/src/rules/advisory.ts
@@ -112,8 +112,13 @@ export type GateCheckPolicy = {
   /** PR-size HOLD (#gate-size). When set (advisory/block), a PR with >= sizeGateMaxFiles changed files OR
    *  >= sizeGateMaxLines changed (added+deleted) lines that would OTHERWISE pass is HELD for manual review — a
    *  neutral gate → "manual" verdict, never auto-merged and never a hard failure. Defaults off; thresholds default
-   *  to 10 files / 1000 lines. This is a HOLD (advisory dry-run friendly), not a close. */
+   *  to 10 files / 1000 lines when sizeGateMaxFiles/sizeGateMaxLines are unset. This is a HOLD (advisory dry-run
+   *  friendly), not a close. */
   sizeGateMode?: GateRuleMode | undefined;
+  /** PR-size HOLD file-count threshold (#gate-size). `null`/undefined ⇒ the 10-file default. */
+  sizeGateMaxFiles?: number | null | undefined;
+  /** PR-size HOLD changed-line-count threshold (#gate-size). `null`/undefined ⇒ the 1000-line default. */
+  sizeGateMaxLines?: number | null | undefined;
   /** Lockfile-tamper-risk gate (#2563). When `block`, a `lockfile_tamper_risk` finding (produced by
    *  review/lockfile-tamper.ts when a changed package-lock.json's resolved/integrity value changed without a
    *  matching package.json version bump, or points off the npm registry) becomes a hard blocker. Defaults to
@@ -517,16 +522,14 @@ function buildSizeHoldFinding(policy: GateCheckPolicy): AdvisoryFinding | null {
   if (!policy.sizeGateMode || policy.sizeGateMode === "off") return null;
   const files = policy.changedFileCount ?? 0;
   const lines = policy.changedLineCount ?? 0;
-  if (
-    files < SIZE_HOLD_DEFAULT_MAX_FILES &&
-    lines < SIZE_HOLD_DEFAULT_MAX_LINES
-  )
-    return null;
+  const maxFiles = policy.sizeGateMaxFiles ?? SIZE_HOLD_DEFAULT_MAX_FILES;
+  const maxLines = policy.sizeGateMaxLines ?? SIZE_HOLD_DEFAULT_MAX_LINES;
+  if (files < maxFiles && lines < maxLines) return null;
   return {
     code: "oversized_pr",
     severity: "warning",
     title: "Large change — held for manual review",
-    detail: `This PR changes ${files} file(s) / ${lines} line(s) (hold threshold: ${SIZE_HOLD_DEFAULT_MAX_FILES} files or ${SIZE_HOLD_DEFAULT_MAX_LINES} lines).`,
+    detail: `This PR changes ${files} file(s) / ${lines} line(s) (hold threshold: ${maxFiles} files or ${maxLines} lines).`,
     action: "Split this into smaller, focused PRs, or a maintainer reviews and merges it manually.",
   };
 }
diff --git a/src/signals/focus-manifest.ts b/src/signals/focus-manifest.ts
index 289324d35b..76889b929d 100644
--- a/src/signals/focus-manifest.ts
+++ b/src/signals/focus-manifest.ts
@@ -470,6 +470,8 @@ function applyGateConfigOverrides(effective: RepositorySettings, gate: FocusMani
   if (gate.readinessMode !== null) effective.qualityGateMode = gate.readinessMode;
   if (gate.readinessMinScore !== null) effective.qualityGateMinScore = gate.readinessMinScore;
   if (gate.sizeMode !== null) effective.sizeGateMode = gate.sizeMode;
+  if (gate.sizeMaxFiles !== null) effective.sizeGateMaxFiles = gate.sizeMaxFiles;
+  if (gate.sizeMaxLines !== null) effective.sizeGateMaxLines = gate.sizeMaxLines;
   if (gate.lockfileIntegrityMode !== null) effective.lockfileIntegrityGateMode = gate.lockfileIntegrityMode;
   if (gate.slopMode !== null) effective.slopGateMode = gate.slopMode;
   if (gate.slopMinScore !== null) effective.slopGateMinScore = gate.slopMinScore;
diff --git a/src/types.ts b/src/types.ts
index be3f73bae9..ff0ef4353c 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -755,9 +755,16 @@ export type RepositorySettings = {
    *  only, applies to every author like every blocker). Default `off` — opt-in via .loopover.yml. */
   slopGateMode: GateRuleMode;
   /** PR-size manual-review HOLD (#gate-size). `off` (default/absent) = no size hold; `advisory`/`block` = a PR with
-   *  >= 10 changed files OR >= 1000 changed (added+deleted) lines that would otherwise pass is HELD for manual review
-   *  (neutral gate → "manual" verdict), never auto-merged and never a hard failure. Opt-in via `gate.size.mode`. */
+   *  >= sizeGateMaxFiles changed files OR >= sizeGateMaxLines changed (added+deleted) lines that would otherwise
+   *  pass is HELD for manual review (neutral gate → "manual" verdict), never auto-merged and never a hard failure.
+   *  Opt-in via `gate.size.mode`. */
   sizeGateMode?: GateRuleMode | undefined;
+  /** PR-size HOLD file-count threshold (#gate-size), config-only (no DB column, mirrors sizeGateMode) — set via
+   *  `.loopover.yml gate.size.maxFiles`. `undefined` ⇒ the 10-file default (src/rules/advisory.ts). */
+  sizeGateMaxFiles?: number | undefined;
+  /** PR-size HOLD changed-line-count threshold (#gate-size), config-only (no DB column, mirrors sizeGateMode) —
+   *  set via `.loopover.yml gate.size.maxLines`. `undefined` ⇒ the 1000-line default (src/rules/advisory.ts). */
+  sizeGateMaxLines?: number | undefined;
   /** Lockfile-tamper-risk gate (#2563). `off` (default/absent) = no scan; `advisory`/`block` = a changed
    *  `package-lock.json` whose diff changes a `resolved`/`integrity` value WITHOUT the same package's version
    *  changing in a changed `package.json`, or whose `resolved` URL points outside `registry.npmjs.org`, produces
diff --git a/test/unit/focus-manifest.test.ts b/test/unit/focus-manifest.test.ts
index fcba9bbfa0..96e1ab93d8 100644
--- a/test/unit/focus-manifest.test.ts
+++ b/test/unit/focus-manifest.test.ts
@@ -257,6 +257,8 @@ describe(".loopover.yml.example field-exhaustiveness (#1670)", () => {
     slopMinScore: "slop:",
     slopAiAdvisory: "aiAdvisory:",
     sizeMode: "size:",
+    sizeMaxFiles: "size:",
+    sizeMaxLines: "size:",
     lockfileIntegrityMode: "lockfileIntegrity:",
     aiReviewMode: "aiReview:",
     aiReviewByok: "byok:",
@@ -869,7 +871,7 @@ describe("compileFocusManifestPolicy", () => {
       issueDiscoveryPolicy: "neutral",
       maintainerNotes: [],
       publicNotes: ["Keep PRs focused.", "Maximize your reward payout"],
-      gate: { present: false, enabled: null, checkMode: null, pack: null, linkedIssue: null, duplicates: null, readinessMode: null, readinessMinScore: null, slopMode: null, slopMinScore: null, slopAiAdvisory: null, sizeMode: null, lockfileIntegrityMode: null, aiReviewMode: null, aiReviewByok: null, aiReviewProvider: null, aiReviewModel: null, aiReviewAllAuthors: null, aiReviewCloseConfidence: null, aiReviewLowConfidenceDisposition: null, aiReviewCombine: null, aiReviewOnMerge: null, aiReviewReviewers: null, mergeReadiness: null, selfAuthoredLinkedIssue: null, linkedIssueSatisfaction: null, manifestPolicy: null, dryRun: null, firstTimeContributorGrace: null, premergeContentRecheck: null, requireFreshRebaseWindowMinutes: null, claMode: null, claConsentPhrase: null, claCheckRunName: null, claCheckRunAppSlug: null, expectedCiContexts: null, advisoryCheckRuns: null, aiJudgmentBlockersMode: null, copycatMode: null, copycatMinScore: null },
+      gate: { present: false, enabled: null, checkMode: null, pack: null, linkedIssue: null, duplicates: null, readinessMode: null, readinessMinScore: null, slopMode: null, slopMinScore: null, slopAiAdvisory: null, sizeMode: null, sizeMaxFiles: null, sizeMaxLines: null, lockfileIntegrityMode: null, aiReviewMode: null, aiReviewByok: null, aiReviewProvider: null, aiReviewModel: null, aiReviewAllAuthors: null, aiReviewCloseConfidence: null, aiReviewLowConfidenceDisposition: null, aiReviewCombine: null, aiReviewOnMerge: null, aiReviewReviewers: null, mergeReadiness: null, selfAuthoredLinkedIssue: null, linkedIssueSatisfaction: null, manifestPolicy: null, dryRun: null, firstTimeContributorGrace: null, premergeContentRecheck: null, requireFreshRebaseWindowMinutes: null, claMode: null, claConsentPhrase: null, claCheckRunName: null, claCheckRunAppSlug: null, expectedCiContexts: null, advisoryCheckRuns: null, aiJudgmentBlockersMode: null, copycatMode: null, copycatMinScore: null },
       settings: {},
       review: { present: false, footerText: null, note: null, fields: {}, enrichmentAnalyzers: {}, profile: null, tone: null, securityFocus: null, inlineComments: null, fixHandoff: null, autoMergeSummary: null, suggestions: null, changedFilesSummary: null, effortScore: null, impactMap: null, cultureProfile: null, selftune: null, reviewMemory: null, findingCategories: null, inlineCommentsPerCategory: null, minFindingSeverity: null, maxFindings: { blockers: null, nits: null }, commentVerbosity: null, e2eTestDelivery: null, e2eTestAutoTrigger: null, pathInstructions: [], instructions: null, excludePaths: [], pathFilters: [], preMergeChecks: [], autoReview: { ...EMPTY_AUTO_REVIEW_CONFIG }, aiModel: { ...EMPTY_SELF_HOST_AI_MODEL_CONFIG }, visual: { ...EMPTY_VISUAL_CONFIG }, linkedIssueSatisfaction: null, sharedConfigSource: null },
       features: { present: false, rag: null, reputation: null, unifiedComment: null, safety: null, grounding: null, e2eTests: null, screenshots: null, improvementSignal: null },
@@ -1181,7 +1183,7 @@ describe("parseFocusManifest gate config", () => {
     // the block→advisory deprecation-downgrade behavior itself is covered separately below.
     const m = parseFocusManifest({ gate: { linkedIssue: "block", duplicates: "advisory", readiness: { mode: "advisory", minScore: 70 } } });
     expect(m.present).toBe(true);
-    expect(m.gate).toEqual({ present: true, enabled: null, checkMode: null, pack: null, linkedIssue: "block", duplicates: "advisory", readinessMode: "advisory", readinessMinScore: 70, slopMode: null, slopMinScore: null, slopAiAdvisory: null, sizeMode: null, lockfileIntegrityMode: null, aiReviewMode: null, aiReviewByok: null, aiReviewProvider: null, aiReviewModel: null, aiReviewAllAuthors: null, aiReviewCloseConfidence: null, aiReviewLowConfidenceDisposition: null, aiReviewCombine: null, aiReviewOnMerge: null, aiReviewReviewers: null, mergeReadiness: null, selfAuthoredLinkedIssue: null, linkedIssueSatisfaction: null, manifestPolicy: null, dryRun: null, firstTimeContributorGrace: null, premergeContentRecheck: null, requireFreshRebaseWindowMinutes: null, claMode: null, claConsentPhrase: null, claCheckRunName: null, claCheckRunAppSlug: null, expectedCiContexts: null, advisoryCheckRuns: null, aiJudgmentBlockersMode: null, copycatMode: null, copycatMinScore: null });
+    expect(m.gate).toEqual({ present: true, enabled: null, checkMode: null, pack: null, linkedIssue: "block", duplicates: "advisory", readinessMode: "advisory", readinessMinScore: 70, slopMode: null, slopMinScore: null, slopAiAdvisory: null, sizeMode: null, sizeMaxFiles: null, sizeMaxLines: null, lockfileIntegrityMode: null, aiReviewMode: null, aiReviewByok: null, aiReviewProvider: null, aiReviewModel: null, aiReviewAllAuthors: null, aiReviewCloseConfidence: null, aiReviewLowConfidenceDisposition: null, aiReviewCombine: null, aiReviewOnMerge: null, aiReviewReviewers: null, mergeReadiness: null, selfAuthoredLinkedIssue: null, linkedIssueSatisfaction: null, manifestPolicy: null, dryRun: null, firstTimeContributorGrace: null, premergeContentRecheck: null, requireFreshRebaseWindowMinutes: null, claMode: null, claConsentPhrase: null, claCheckRunName: null, claCheckRunAppSlug: null, expectedCiContexts: null, advisoryCheckRuns: null, aiJudgmentBlockersMode: null, copycatMode: null, copycatMinScore: null });
   });
 
   it("parses gate.mergeReadiness + gate.firstTimeContributorGrace, round-trips them, and warns on bad values (#822)", () => {
diff --git a/test/unit/gate-check-policy.test.ts b/test/unit/gate-check-policy.test.ts
index 5e6231549f..7482b55c6e 100644
--- a/test/unit/gate-check-policy.test.ts
+++ b/test/unit/gate-check-policy.test.ts
@@ -916,6 +916,29 @@ describe("size + guardrail manual-review HOLD (#gate-size / #gate-guardrail)", (
     const eff = resolveEffectiveSettings(settings({}), parseFocusManifest({ gate: { size: { mode: "advisory" } } }));
     expect(eff.sizeGateMode).toBe("advisory");
   });
+  it("gateCheckPolicy threads settings.sizeGateMaxFiles/sizeGateMaxLines through to the policy object", () => {
+    const policy = gateCheckPolicy(settings({ sizeGateMode: "advisory", sizeGateMaxFiles: 30, sizeGateMaxLines: 2000 } as Partial<RepositorySettings>), null, true);
+    expect(policy.sizeGateMaxFiles).toBe(30);
+    expect(policy.sizeGateMaxLines).toBe(2000);
+  });
+  it("gateCheckPolicy defaults sizeGateMaxFiles/sizeGateMaxLines to null when unset on settings", () => {
+    const policy = gateCheckPolicy(settings({ sizeGateMode: "advisory" }), null, true);
+    expect(policy.sizeGateMaxFiles).toBeNull();
+    expect(policy.sizeGateMaxLines).toBeNull();
+  });
+  it("resolveEffectiveSettings maps gate.size.maxFiles/maxLines → sizeGateMaxFiles/sizeGateMaxLines (#automation-config)", () => {
+    const eff = resolveEffectiveSettings(settings({}), parseFocusManifest({ gate: { size: { mode: "advisory", maxFiles: 25, maxLines: 400 } } }));
+    expect(eff.sizeGateMaxFiles).toBe(25);
+    expect(eff.sizeGateMaxLines).toBe(400);
+  });
+  it("configured sizeGateMaxFiles/sizeGateMaxLines REPLACE the 10-file/1000-line defaults, in both directions", () => {
+    // A raised maxFiles threshold: a PR that would hold under the 10-file default now passes.
+    expect(evaluateGateCheck(clean(), { sizeGateMode: "advisory", sizeGateMaxFiles: 25, changedFileCount: 12, changedLineCount: 10 }).conclusion).toBe("success");
+    // A lowered maxLines threshold: a PR that would pass under the 1000-line default now holds.
+    expect(evaluateGateCheck(clean(), { sizeGateMode: "advisory", sizeGateMaxLines: 400, changedFileCount: 2, changedLineCount: 500 }).conclusion).toBe("neutral");
+    // null (as opposed to a configured number) falls back to the built-in default, same as unset.
+    expect(evaluateGateCheck(clean(), { sizeGateMode: "advisory", sizeGateMaxFiles: null, changedFileCount: 9, changedLineCount: 999 }).conclusion).toBe("success");
+  });
 });
 
 describe("lockfile-tamper-risk gate blocker (#2563)", () => {