diff --git a/src/summary_mcp/models/openclaw_delivery.py b/src/summary_mcp/models/openclaw_delivery.py
index 0e12eb2..2f71ca5 100644
--- a/src/summary_mcp/models/openclaw_delivery.py
+++ b/src/summary_mcp/models/openclaw_delivery.py
@@ -11,7 +11,7 @@ from pydantic import BaseModel, Field
 
 from .article_candidate import OpenClawCandidateInput
 
-DIGEST_BRIEF_LIMIT = 5
+DIGEST_BRIEF_LIMIT: int | None = None
 DIGEST_BRIEF_HIGHLIGHT_LIMIT = 3
 
 
@@ -81,11 +81,12 @@ def build_openclaw_delivery_payload(
 def build_openclaw_digest_brief(
     payload: OpenClawDeliveryPayload,
     *,
-    limit: int = DIGEST_BRIEF_LIMIT,
+    limit: int | None = DIGEST_BRIEF_LIMIT,
     highlight_limit: int = DIGEST_BRIEF_HIGHLIGHT_LIMIT,
 ) -> OpenClawDigestBrief:
     keep_candidates = [candidate for candidate in payload.candidates if candidate.selection_decision == "keep"]
     sorted_candidates = sorted(keep_candidates, key=lambda candidate: candidate.digest_rank, reverse=True)
+    selected_candidates = sorted_candidates if limit is None else sorted_candidates[:limit]
     top_candidates = [
         DigestBriefCandidate(
             title=candidate.title,
@@ -97,7 +98,7 @@ def build_openclaw_digest_brief(
             selection_decision=candidate.selection_decision,
             url=str(candidate.url),
         )
-        for candidate in sorted_candidates[:limit]
+        for candidate in selected_candidates
     ]
     return OpenClawDigestBrief(
         schema_version="digest-brief.v1",