From b46cef2c7badff2a8d509cf9402675f3bf6e5f64 Mon Sep 17 00:00:00 2001
From: Mimikko-zeus <mimikko_zeus@163.com>
Date: Wed, 10 Jun 2026 21:31:13 +0800
Subject: [PATCH] Add Stage 2.8 recall, quality gate, retries, and publish
 idempotency

---
 .learnings/ERRORS.md                          | 144 ++++++++++++++++
 ai_daily_report/candidate_recall.py           | 162 ++++++++++++++++++
 ai_daily_report/clients.py                    |  73 +++++++-
 ai_daily_report/collect.py                    |  15 ++
 ai_daily_report/pipeline.py                   |  74 ++++++++
 ai_daily_report/publish.py                    |  50 ++++++
 ai_daily_report/quality_gate.py               |  91 ++++++++++
 ai_daily_report/runner.py                     |  24 ++-
 ...-06-10-ai-daily-full-chain-optimization.md | 130 ++++++++++++++
 tests/test_candidate_recall.py                |  79 +++++++++
 tests/test_clients.py                         |  25 ++-
 tests/test_quality_gate.py                    |  78 +++++++++
 tests/test_runner.py                          | 120 +++++++++++++
 tests/test_stage0_collect.py                  |  13 ++
 tests/test_stage0_to_4_pipeline.py            | 136 +++++++++++++++
 tests/test_stage8_publish.py                  |  45 ++++-
 16 files changed, 1253 insertions(+), 6 deletions(-)
 create mode 100644 .learnings/ERRORS.md
 create mode 100644 ai_daily_report/candidate_recall.py
 create mode 100644 ai_daily_report/quality_gate.py
 create mode 100644 docs/plans/2026-06-10-ai-daily-full-chain-optimization.md
 create mode 100644 tests/test_candidate_recall.py
 create mode 100644 tests/test_quality_gate.py

diff --git a/.learnings/ERRORS.md b/.learnings/ERRORS.md
new file mode 100644
index 0000000..984f706
--- /dev/null
+++ b/.learnings/ERRORS.md
@@ -0,0 +1,144 @@
+## [ERR-20260606-001] computer_use_helper_startup
+
+**Logged**: 2026-06-06T00:00:00+08:00
+**Priority**: medium
+**Status**: pending
+**Area**: infra
+
+### Summary
+Computer Use helper failed during Windows automation startup.
+
+### Error
+```text
+node_repl kernel exited unexpectedly
+windows sandbox failed: spawn setup refresh
+```
+
+### Context
+- Operation attempted: initialize Computer Use and list Windows apps.
+- Retried after resetting the JavaScript session.
+- Both attempts failed before any app automation actions were taken.
+
+### Suggested Fix
+Investigate the Computer Use Windows helper startup path and sandbox setup; retry after the helper/runtime is refreshed.
+
+### Metadata
+- Reproducible: yes
+- Related Files: C:/Users/12256/.codex/plugins/cache/openai-bundled/computer-use/26.602.40724/scripts/computer-use-client.mjs
+
+---
+
+## [ERR-20260610-001] absolute_path_prefixed_with_workspace
+
+**Logged**: 2026-06-10T00:00:00+08:00
+**Priority**: low
+**Status**: pending
+**Area**: docs
+
+### Summary
+An absolute skill file path was accidentally prefixed with the current workspace path when verifying completion.
+
+### Error
+```text
+Get-Content : Cannot find path 'E:\Codes\ai-daily-report\C:\Users\12256\.codex\superpowers\skills\verification-before-completion\SKILL.md'
+```
+
+### Context
+- Operation attempted: read `C:\Users\12256\.codex\superpowers\skills\verification-before-completion\SKILL.md`.
+- The command used a malformed literal path that concatenated the workspace root and the absolute path.
+- Re-running with the actual absolute path succeeded.
+
+### Suggested Fix
+When reading skill files or other absolute Windows paths, pass the `C:\...` path directly and do not combine it with the workspace path.
+
+### Metadata
+- Reproducible: yes
+- Related Files: C:\Users\12256\.codex\superpowers\skills\verification-before-completion\SKILL.md
+
+---
+
+## [ERR-20260608-003] git_push_auth_failed
+
+**Logged**: 2026-06-08T00:00:00+08:00
+**Priority**: medium
+**Status**: pending
+**Area**: infra
+
+### Summary
+`git push origin main` failed because the Gitea remote rejected authentication.
+
+### Error
+```text
+remote: Failed to authenticate user
+fatal: Authentication failed for 'https://gitea.ephron.ren/Elaina/ai-daily-report.git/'
+```
+
+### Context
+- Operation attempted: push committed cross-day dedupe fix to `origin/main`.
+- Local commit exists: `07786e3 fix: add cross-day dedupe`.
+- Test suite passed before commit: `79 passed`.
+
+### Suggested Fix
+Refresh Git credentials for `https://gitea.ephron.ren` or switch the remote to an authenticated SSH/HTTPS URL, then rerun `git push origin main`.
+
+### Metadata
+- Reproducible: yes
+- Related Files: git remote origin
+
+---
+
+## [ERR-20260608-002] powershell_convertfromjson_mojibake
+
+**Logged**: 2026-06-08T00:00:00+08:00
+**Priority**: low
+**Status**: pending
+**Area**: tests
+
+### Summary
+PowerShell `ConvertFrom-Json` failed on a generated report containing existing mojibake section labels, while Python `json.loads` parsed the same report successfully.
+
+### Error
+```text
+ConvertFrom-Json : Invalid object passed in, ':' or '}' expected.
+```
+
+### Context
+- Operation attempted: verify CLI dry-run output by piping `run_report.json` through `ConvertFrom-Json`.
+- Follow-up verification with Python `json.loads` succeeded and confirmed `stage2_5` and `stage8` fields.
+
+### Suggested Fix
+Use Python's JSON parser for verification in this repository when report content includes mojibake-rendered non-ASCII strings.
+
+### Metadata
+- Reproducible: yes
+- Related Files: run_report.json
+
+---
+
+## [ERR-20260608-001] apply_patch_context_encoding
+
+**Logged**: 2026-06-08T00:00:00+08:00
+**Priority**: low
+**Status**: pending
+**Area**: tests
+
+### Summary
+`apply_patch` failed when matching context lines that contained mojibake-rendered Chinese text.
+
+### Error
+```text
+apply_patch verification failed: Failed to find expected lines
+```
+
+### Context
+- Operation attempted: update `tests/test_stage2_dedupe.py` with a patch anchored on displayed non-ASCII strings.
+- The file content rendered differently enough that the expected context did not match.
+
+### Suggested Fix
+Use ASCII-only anchors, line-number inspection, or smaller structural context when patching files that contain mojibake-rendered non-ASCII text.
+
+### Metadata
+- Reproducible: yes
+- Related Files: tests/test_stage2_dedupe.py
+
+---
diff --git a/ai_daily_report/candidate_recall.py b/ai_daily_report/candidate_recall.py
new file mode 100644
index 0000000..dd4bdb7
--- /dev/null
+++ b/ai_daily_report/candidate_recall.py
@@ -0,0 +1,162 @@
+from __future__ import annotations
+
+import difflib
+import re
+from collections import defaultdict
+from typing import Any
+
+from .dedupe import _jaccard_similarity, _title_tokens
+from .models import NewsItem
+
+
+DEFAULT_CONFIG = {
+    "enabled": True,
+    "max_pairs": 80,
+    "max_pairs_per_item": 5,
+    "title_similarity_threshold": 0.45,
+    "title_jaccard_threshold": 0.25,
+    "summary_jaccard_threshold": 0.18,
+    "strong_entity_overlap_threshold": 2,
+}
+
+STOP_ENTITIES = {
+    "AI",
+    "API",
+    "CLI",
+    "LLM",
+    "Open Source",
+    "GitHub",
+    "Google",
+    "OpenAI",
+    "Anthropic",
+    "Microsoft",
+    "Meta",
+    "Amazon",
+    "NVIDIA",
+}
+
+
+def _config_value(config: dict[str, Any], name: str):
+    return (config or {}).get(name, DEFAULT_CONFIG[name])
+
+
+def _text_tokens(value: str) -> set[str]:
+    return _title_tokens(value)
+
+
+def _entity_tokens(value: str) -> set[str]:
+    text = value or ""
+    entities = set(re.findall(r"\b[A-Z][A-Za-z0-9]*(?:[- ][A-Z0-9][A-Za-z0-9]*)*\b", text))
+    entities.update(re.findall(r"[\u4e00-\u9fffA-Za-z0-9]*[A-Za-z]+[0-9]+[A-Za-z0-9-]*", text))
+    cleaned = {entity.strip() for entity in entities if len(entity.strip()) >= 3}
+    return {entity for entity in cleaned if entity not in STOP_ENTITIES}
+
+
+def _pair_key(item_ids: list[str]) -> frozenset[str]:
+    return frozenset(item_ids)
+
+
+def _candidate_score(left: NewsItem, right: NewsItem, config: dict[str, Any]) -> tuple[float, str, dict[str, Any]] | None:
+    title_ratio = difflib.SequenceMatcher(None, left.title_norm, right.title_norm).ratio()
+    title_jaccard = _jaccard_similarity(_text_tokens(left.title_norm), _text_tokens(right.title_norm))
+    summary_jaccard = _jaccard_similarity(_text_tokens(left.summary_raw), _text_tokens(right.summary_raw))
+    left_entities = _entity_tokens(f"{left.title_raw} {left.summary_raw}")
+    right_entities = _entity_tokens(f"{right.title_raw} {right.summary_raw}")
+    shared_entities = sorted(left_entities & right_entities)
+    strong_entity_threshold = int(_config_value(config, "strong_entity_overlap_threshold"))
+
+    if len(shared_entities) >= strong_entity_threshold and summary_jaccard > 0:
+        score = min(1.0, 0.55 + len(shared_entities) * 0.1 + summary_jaccard * 0.35)
+        return score, "strong_entity_overlap", {
+            "shared_entities": shared_entities,
+            "title_similarity": round(title_ratio, 3),
+            "title_jaccard": round(title_jaccard, 3),
+            "summary_jaccard": round(summary_jaccard, 3),
+        }
+
+    if title_ratio >= float(_config_value(config, "title_similarity_threshold")) and (
+        title_jaccard >= float(_config_value(config, "title_jaccard_threshold"))
+        or summary_jaccard >= float(_config_value(config, "summary_jaccard_threshold")) * 2
+        or shared_entities
+    ):
+        return title_ratio, "title_similarity", {
+            "title_similarity": round(title_ratio, 3),
+            "title_jaccard": round(title_jaccard, 3),
+            "summary_jaccard": round(summary_jaccard, 3),
+        }
+
+    if (
+        title_jaccard >= float(_config_value(config, "title_jaccard_threshold"))
+        and summary_jaccard >= float(_config_value(config, "summary_jaccard_threshold"))
+    ):
+        score = (title_jaccard + summary_jaccard) / 2
+        return score, "title_summary_jaccard", {
+            "title_similarity": round(title_ratio, 3),
+            "title_jaccard": round(title_jaccard, 3),
+            "summary_jaccard": round(summary_jaccard, 3),
+        }
+
+    return None
+
+
+def recall_semantic_candidates(
+    items: list[NewsItem],
+    *,
+    existing_candidates: list[dict[str, Any]] | None = None,
+    config: dict[str, Any] | None = None,
+) -> tuple[list[dict[str, Any]], dict[str, Any]]:
+    config = {**DEFAULT_CONFIG, **(config or {})}
+    existing_candidates = list(existing_candidates or [])
+    if not bool(config.get("enabled", True)):
+        return existing_candidates, {
+            "enabled": False,
+            "input_count": len(items),
+            "existing_candidate_group_count": len(existing_candidates),
+            "added_candidate_group_count": 0,
+            "candidate_group_count": len(existing_candidates),
+            "candidates": existing_candidates,
+        }
+
+    existing_keys = {_pair_key(list(candidate.get("item_ids", []) or [])) for candidate in existing_candidates}
+    pair_counts: defaultdict[str, int] = defaultdict(int)
+    recalled: list[dict[str, Any]] = []
+
+    for index, left in enumerate(items):
+        for right in items[index + 1 :]:
+            if pair_counts[left.id] >= int(config["max_pairs_per_item"]):
+                continue
+            if pair_counts[right.id] >= int(config["max_pairs_per_item"]):
+                continue
+            key = frozenset({left.id, right.id})
+            if key in existing_keys:
+                continue
+            scored = _candidate_score(left, right, config)
+            if scored is None:
+                continue
+            score, reason, evidence = scored
+            recalled.append(
+                {
+                    "item_ids": [left.id, right.id],
+                    "reason": reason,
+                    "score": round(score, 3),
+                    "confidence": "medium",
+                    **evidence,
+                }
+            )
+            pair_counts[left.id] += 1
+            pair_counts[right.id] += 1
+            if len(recalled) >= int(config["max_pairs"]):
+                break
+        if len(recalled) >= int(config["max_pairs"]):
+            break
+
+    candidates = existing_candidates + recalled
+    report = {
+        "enabled": True,
+        "input_count": len(items),
+        "existing_candidate_group_count": len(existing_candidates),
+        "added_candidate_group_count": len(recalled),
+        "candidate_group_count": len(candidates),
+        "candidates": candidates,
+    }
+    return candidates, report
diff --git a/ai_daily_report/clients.py b/ai_daily_report/clients.py
index 2fd3359..64aeb8a 100644
--- a/ai_daily_report/clients.py
+++ b/ai_daily_report/clients.py
@@ -1,6 +1,10 @@
 from __future__ import annotations
 
 import json
+import socket
+import time
+from dataclasses import dataclass
+from urllib.error import HTTPError, URLError
 import urllib.request
 from typing import Any
 
@@ -8,10 +12,61 @@ from typing import Any
 UA = "Mozilla/5.0 (compatible; ai-daily-report/1.0)"
 
 
-def fetch_text(url: str, timeout_seconds: int) -> str:
+@dataclass
+class FetchTextError(Exception):
+    error_type: str
+    message: str
+    http_status: int | None = None
+    attempts: int = 1
+
+    def __str__(self) -> str:
+        return self.message
+
+
+def _classify_fetch_exception(exc: Exception) -> tuple[str, int | None, bool]:
+    if isinstance(exc, HTTPError):
+        if exc.code == 404:
+            return "http_404", exc.code, False
+        if exc.code in {429, 500, 502, 503, 504}:
+            return f"http_{exc.code}", exc.code, True
+        return f"http_{exc.code}", exc.code, False
+    if isinstance(exc, TimeoutError | socket.timeout):
+        return "timeout", None, True
+    if isinstance(exc, URLError):
+        reason = exc.reason
+        if isinstance(reason, TimeoutError | socket.timeout):
+            return "timeout", None, True
+        return "network_error", None, True
+    return "fetch_error", None, False
+
+
+def fetch_text(
+    url: str,
+    timeout_seconds: int,
+    *,
+    retries: int = 0,
+    backoff_seconds: float = 0.5,
+) -> str:
     req = urllib.request.Request(url, headers={"User-Agent": UA})
-    with urllib.request.urlopen(req, timeout=timeout_seconds) as response:
-        return response.read().decode("utf-8", "ignore")
+    attempts = max(1, retries + 1)
+    last_error: FetchTextError | None = None
+    for attempt in range(1, attempts + 1):
+        try:
+            with urllib.request.urlopen(req, timeout=timeout_seconds) as response:
+                return response.read().decode("utf-8", "ignore")
+        except Exception as exc:
+            error_type, http_status, retryable = _classify_fetch_exception(exc)
+            last_error = FetchTextError(
+                error_type=error_type,
+                message=f"{type(exc).__name__}: {exc}",
+                http_status=http_status,
+                attempts=attempt,
+            )
+            if not retryable or attempt >= attempts:
+                raise last_error from exc
+            if backoff_seconds > 0:
+                time.sleep(backoff_seconds * (2 ** (attempt - 1)))
+    raise last_error or FetchTextError("fetch_error", "unknown fetch error", attempts=attempts)
 
 
 class OpenAICompatibleClient:
@@ -60,5 +115,17 @@ class BlogApiClient:
     def create_post(self, payload: dict[str, Any]) -> dict[str, Any]:
         return self._request("POST", "/api/service/posts", payload)
 
+    def get_post_by_slug(self, slug: str) -> dict[str, Any] | None:
+        try:
+            return self._request("GET", f"/api/service/posts/{slug}")
+        except HTTPError as exc:
+            if exc.code == 404:
+                return None
+            raise
+        except FetchTextError as exc:
+            if exc.error_type == "http_404":
+                return None
+            raise
+
     def publish_post(self, slug: str) -> None:
         self._request("POST", f"/api/service/posts/{slug}/publish")
diff --git a/ai_daily_report/collect.py b/ai_daily_report/collect.py
index b1c947e..fe2567a 100644
--- a/ai_daily_report/collect.py
+++ b/ai_daily_report/collect.py
@@ -5,6 +5,7 @@ from datetime import datetime, timezone
 from time import perf_counter
 from typing import Callable, Iterable, Any
 
+from .clients import FetchTextError
 from .models import SourceConfig, SourceResult
 
 
@@ -12,11 +13,19 @@ Fetcher = Callable[[SourceConfig, str], list[dict[str, Any]]]
 
 
 def _status_from_exception(exc: Exception) -> str:
+    if isinstance(exc, FetchTextError):
+        return exc.error_type
     if isinstance(exc, TimeoutError):
         return "timeout"
     return "error"
 
 
+def _retry_count_from_exception(exc: Exception) -> int:
+    if isinstance(exc, FetchTextError):
+        return max(0, exc.attempts - 1)
+    return 0
+
+
 def _collect_one(config: SourceConfig, run_date: str, fetcher: Fetcher) -> SourceResult:
     fetched_at = datetime.now(timezone.utc).isoformat()
     if not config.enabled:
@@ -51,6 +60,7 @@ def _collect_one(config: SourceConfig, run_date: str, fetcher: Fetcher) -> Sourc
             status=_status_from_exception(exc),
             error=f"{type(exc).__name__}: {exc}",
             elapsed_ms=elapsed_ms,
+            retry_count=_retry_count_from_exception(exc),
             fetched_at=fetched_at,
         )
 
@@ -91,5 +101,10 @@ def collect_sources(
         "raw_item_count": sum(len(result.items) for result in results),
         "source_counts": {result.source: len(result.items) for result in results},
         "statuses": {result.source: result.status for result in results},
+        "error_types": {
+            result.source: result.status
+            for result in results
+            if not result.ok and result.status != "disabled"
+        },
     }
     return results, report
diff --git a/ai_daily_report/pipeline.py b/ai_daily_report/pipeline.py
index 0abbeaa..a5f4251 100644
--- a/ai_daily_report/pipeline.py
+++ b/ai_daily_report/pipeline.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 from typing import Any
 
 from .assemble import assemble_markdown
+from .candidate_recall import recall_semantic_candidates
 from .classify import classify_and_order_items
 from .collect import Fetcher, collect_sources
 from .dedupe import cross_day_dedup_items, hard_dedup_items
@@ -10,6 +11,7 @@ from .guide import GuideLlmCall, generate_guide
 from .models import PublishedUrls, SourceConfig
 from .normalize import normalize_items
 from .publish import BlogClient, publish_markdown
+from .quality_gate import evaluate_quality_gate
 from .rewrite import RewriteLlmCall, rewrite_items
 from .semantic_dedupe import SemanticLlmCall, semantic_dedup_items
 
@@ -49,6 +51,11 @@ def run_stage0_to_stage2(
         source_priorities=source_priorities,
     )
     deduped_items, stage2_report = hard_dedup_items(normalized_items)
+    artifacts = {
+        "stage0_sources": source_results,
+        "stage1_items": normalized_items,
+        "stage2_items": deduped_items,
+    }
     return {
         "source_results": source_results,
         "items": deduped_items,
@@ -57,6 +64,7 @@ def run_stage0_to_stage2(
             "stage1": stage1_report,
             "stage2": stage2_report,
         },
+        "artifacts": artifacts,
     }
 
 
@@ -90,10 +98,13 @@ def run_stage0_to_stage2_5(
     reports = dict(stage2_result["reports"])
     stage2_5_report.setdefault("enabled", cross_day_dedup_enabled)
     reports["stage2_5"] = stage2_5_report
+    artifacts = dict(stage2_result.get("artifacts", {}))
+    artifacts["stage2_5_items"] = items
     return {
         "source_results": stage2_result["source_results"],
         "items": items,
         "reports": reports,
+        "artifacts": artifacts,
     }
 
 
@@ -107,6 +118,10 @@ def run_stage0_to_stage4(
     published_urls: PublishedUrls | None = None,
     cross_day_dedup_enabled: bool = True,
     cross_day_dedup_max_age_days: int = 7,
+    semantic_dedup_max_deletion_ratio: float = 0.5,
+    rewrite_batch_size: int = 30,
+    semantic_candidate_recall_config: dict[str, Any] | None = None,
+    quality_gate_config: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     stage2_5_result = run_stage0_to_stage2_5(
         source_configs,
@@ -123,22 +138,35 @@ def run_stage0_to_stage4(
         for candidate in stage2_5_result["reports"]["stage2"].get("possible_duplicates", [])
         if set(candidate.get("item_ids", [])).issubset(remaining_ids)
     ]
+    candidates, stage2_8_report = recall_semantic_candidates(
+        items,
+        existing_candidates=candidates,
+        config=semantic_candidate_recall_config,
+    )
     semantic_items, stage3_report = semantic_dedup_items(
         items,
         candidates,
         llm_call=semantic_llm_call,
+        max_deletion_ratio=semantic_dedup_max_deletion_ratio,
     )
     rewritten_items, stage4_report = rewrite_items(
         semantic_items,
         llm_call=rewrite_llm_call,
+        batch_size=rewrite_batch_size,
     )
     reports = dict(stage2_5_result["reports"])
+    reports["stage2_8"] = stage2_8_report
     reports["stage3"] = stage3_report
     reports["stage4"] = stage4_report
+    artifacts = dict(stage2_5_result.get("artifacts", {}))
+    artifacts["stage2_8_candidates"] = candidates
+    artifacts["stage3_items"] = semantic_items
+    artifacts["stage4_items"] = rewritten_items
     return {
         "source_results": stage2_5_result["source_results"],
         "items": rewritten_items,
         "reports": reports,
+        "artifacts": artifacts,
     }
 
 
@@ -152,6 +180,10 @@ def run_stage0_to_stage5(
     published_urls: PublishedUrls | None = None,
     cross_day_dedup_enabled: bool = True,
     cross_day_dedup_max_age_days: int = 7,
+    semantic_dedup_max_deletion_ratio: float = 0.5,
+    rewrite_batch_size: int = 30,
+    semantic_candidate_recall_config: dict[str, Any] | None = None,
+    quality_gate_config: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     stage4_result = run_stage0_to_stage4(
         source_configs,
@@ -162,6 +194,9 @@ def run_stage0_to_stage5(
         published_urls=published_urls,
         cross_day_dedup_enabled=cross_day_dedup_enabled,
         cross_day_dedup_max_age_days=cross_day_dedup_max_age_days,
+        semantic_dedup_max_deletion_ratio=semantic_dedup_max_deletion_ratio,
+        rewrite_batch_size=rewrite_batch_size,
+        semantic_candidate_recall_config=semantic_candidate_recall_config,
     )
     classified_items, stage5_report = classify_and_order_items(stage4_result["items"])
     reports = dict(stage4_result["reports"])
@@ -170,6 +205,7 @@ def run_stage0_to_stage5(
         "source_results": stage4_result["source_results"],
         "items": classified_items,
         "reports": reports,
+        "artifacts": stage4_result.get("artifacts", {}),
     }
 
 
@@ -184,6 +220,9 @@ def run_stage0_to_stage6(
     published_urls: PublishedUrls | None = None,
     cross_day_dedup_enabled: bool = True,
     cross_day_dedup_max_age_days: int = 7,
+    semantic_dedup_max_deletion_ratio: float = 0.5,
+    rewrite_batch_size: int = 30,
+    semantic_candidate_recall_config: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     stage5_result = run_stage0_to_stage5(
         source_configs,
@@ -194,6 +233,9 @@ def run_stage0_to_stage6(
         published_urls=published_urls,
         cross_day_dedup_enabled=cross_day_dedup_enabled,
         cross_day_dedup_max_age_days=cross_day_dedup_max_age_days,
+        semantic_dedup_max_deletion_ratio=semantic_dedup_max_deletion_ratio,
+        rewrite_batch_size=rewrite_batch_size,
+        semantic_candidate_recall_config=semantic_candidate_recall_config,
     )
     guide, stage6_report = generate_guide(stage5_result["items"], llm_call=guide_llm_call)
     reports = dict(stage5_result["reports"])
@@ -203,6 +245,7 @@ def run_stage0_to_stage6(
         "items": stage5_result["items"],
         "guide": guide,
         "reports": reports,
+        "artifacts": stage5_result.get("artifacts", {}),
     }
 
 
@@ -217,6 +260,10 @@ def run_stage0_to_stage7(
     published_urls: PublishedUrls | None = None,
     cross_day_dedup_enabled: bool = True,
     cross_day_dedup_max_age_days: int = 7,
+    semantic_dedup_max_deletion_ratio: float = 0.5,
+    rewrite_batch_size: int = 30,
+    semantic_candidate_recall_config: dict[str, Any] | None = None,
+    quality_gate_config: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     stage6_result = run_stage0_to_stage6(
         source_configs,
@@ -228,6 +275,9 @@ def run_stage0_to_stage7(
         published_urls=published_urls,
         cross_day_dedup_enabled=cross_day_dedup_enabled,
         cross_day_dedup_max_age_days=cross_day_dedup_max_age_days,
+        semantic_dedup_max_deletion_ratio=semantic_dedup_max_deletion_ratio,
+        rewrite_batch_size=rewrite_batch_size,
+        semantic_candidate_recall_config=semantic_candidate_recall_config,
     )
     markdown, stage7_report = assemble_markdown(stage6_result["items"], stage6_result["guide"])
     upstream_blocking_errors: list[str] = []
@@ -238,13 +288,26 @@ def run_stage0_to_stage7(
         existing_errors = list(stage7_report.get("blocking_errors", []) or [])
         stage7_report["blocking_errors"] = existing_errors + upstream_blocking_errors
     reports = dict(stage6_result["reports"])
+    quality_gate_report = evaluate_quality_gate(
+        stage6_result["items"],
+        source_results=stage6_result["source_results"],
+        reports=reports,
+        config=quality_gate_config,
+    )
+    if quality_gate_report.get("blocking_errors"):
+        existing_errors = list(stage7_report.get("blocking_errors", []) or [])
+        stage7_report["blocking_errors"] = existing_errors + list(quality_gate_report["blocking_errors"])
+    reports["quality_gate"] = quality_gate_report
     reports["stage7"] = stage7_report
+    artifacts = dict(stage6_result.get("artifacts", {}))
+    artifacts["quality_gate"] = quality_gate_report
     return {
         "source_results": stage6_result["source_results"],
         "items": stage6_result["items"],
         "guide": stage6_result["guide"],
         "markdown": markdown,
         "reports": reports,
+        "artifacts": artifacts,
     }
 
 
@@ -262,6 +325,11 @@ def run_stage0_to_stage8(
     published_urls: PublishedUrls | None = None,
     cross_day_dedup_enabled: bool = True,
     cross_day_dedup_max_age_days: int = 7,
+    semantic_dedup_max_deletion_ratio: float = 0.5,
+    rewrite_batch_size: int = 30,
+    semantic_candidate_recall_config: dict[str, Any] | None = None,
+    quality_gate_config: dict[str, Any] | None = None,
+    publish_idempotency_config: dict[str, Any] | None = None,
 ) -> dict[str, Any]:
     stage7_result = run_stage0_to_stage7(
         source_configs,
@@ -273,6 +341,10 @@ def run_stage0_to_stage8(
         published_urls=published_urls,
         cross_day_dedup_enabled=cross_day_dedup_enabled,
         cross_day_dedup_max_age_days=cross_day_dedup_max_age_days,
+        semantic_dedup_max_deletion_ratio=semantic_dedup_max_deletion_ratio,
+        rewrite_batch_size=rewrite_batch_size,
+        semantic_candidate_recall_config=semantic_candidate_recall_config,
+        quality_gate_config=quality_gate_config,
     )
     slug = f"ai-{run_date}"
     publish_result = publish_markdown(
@@ -284,6 +356,7 @@ def run_stage0_to_stage8(
         mode=mode,
         markdown_report=stage7_result["reports"]["stage7"],
         client=client,
+        idempotency_config=publish_idempotency_config,
     )
     reports = dict(stage7_result["reports"])
     reports["stage8"] = {
@@ -301,4 +374,5 @@ def run_stage0_to_stage8(
         "markdown": stage7_result["markdown"],
         "publish": publish_result,
         "reports": reports,
+        "artifacts": stage7_result.get("artifacts", {}),
     }
diff --git a/ai_daily_report/publish.py b/ai_daily_report/publish.py
index 39b84e6..af9cdad 100644
--- a/ai_daily_report/publish.py
+++ b/ai_daily_report/publish.py
@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import json
+import hashlib
 from dataclasses import dataclass
 from datetime import date, datetime, timezone
 from pathlib import Path
@@ -20,6 +21,9 @@ class PublishResult:
 
 
 class BlogClient(Protocol):
+    def get_post_by_slug(self, slug: str) -> dict[str, Any] | None:
+        ...
+
     def create_post(self, payload: dict[str, Any]) -> dict[str, Any]:
         ...
 
@@ -153,6 +157,18 @@ def dry_run_publish(slug: str, base_url: str) -> PublishResult:
     )
 
 
+def _content_hash(value: str) -> str:
+    return hashlib.sha256((value or "").encode("utf-8")).hexdigest()
+
+
+def _get_existing_post(client: BlogClient, slug: str) -> dict[str, Any] | None:
+    getter = getattr(client, "get_post_by_slug", None)
+    if getter is None:
+        return None
+    existing = getter(slug)
+    return existing if isinstance(existing, dict) else None
+
+
 def publish_markdown(
     *,
     title: str,
@@ -163,6 +179,7 @@ def publish_markdown(
     mode: str,
     markdown_report: dict[str, Any],
     client: BlogClient | None,
+    idempotency_config: dict[str, Any] | None = None,
 ) -> PublishResult:
     blocking_errors = markdown_report.get("blocking_errors", []) or []
     blog_url = f"{base_url.rstrip('/')}/posts/{slug}"
@@ -187,6 +204,39 @@ def publish_markdown(
             error="missing_blog_client",
         )
 
+    idempotency_config = idempotency_config or {}
+    if bool(idempotency_config.get("enabled", False)):
+        try:
+            existing_post = _get_existing_post(client, slug)
+        except Exception as exc:
+            return PublishResult(
+                mode=mode,
+                status="failed",
+                slug=slug,
+                blog_url=blog_url,
+                public_ok=False,
+                error=f"idempotency_check_failed:{type(exc).__name__}: {exc}",
+            )
+        if existing_post is not None:
+            existing_content = str(existing_post.get("content") or existing_post.get("markdown") or "")
+            if _content_hash(existing_content) == _content_hash(markdown):
+                return PublishResult(
+                    mode=mode,
+                    status="already_published",
+                    slug=slug,
+                    blog_url=blog_url,
+                    public_ok=True,
+                )
+            if not bool(idempotency_config.get("allow_republish", False)):
+                return PublishResult(
+                    mode=mode,
+                    status="blocked",
+                    slug=slug,
+                    blog_url=blog_url,
+                    public_ok=False,
+                    error="slug_already_exists",
+                )
+
     payload = {"title": title, "content": markdown, "tags": tags, "slug": slug}
     try:
         create_resp = client.create_post(payload)
diff --git a/ai_daily_report/quality_gate.py b/ai_daily_report/quality_gate.py
new file mode 100644
index 0000000..73ebb5b
--- /dev/null
+++ b/ai_daily_report/quality_gate.py
@@ -0,0 +1,91 @@
+from __future__ import annotations
+
+import difflib
+from typing import Any
+
+from .dedupe import _title_tokens
+from .models import NewsItem, SourceResult
+
+
+DEFAULT_CONFIG = {
+    "block_on_required_source_failure": True,
+    "warn_on_enabled_source_failure": True,
+    "warn_when_stage3_candidates_zero_min_items": 30,
+    "warn_on_final_title_similarity": 0.55,
+    "warn_on_entity_frequency": 3,
+    "required_sources": [],
+}
+
+
+def _config(config: dict[str, Any] | None) -> dict[str, Any]:
+    return {**DEFAULT_CONFIG, **(config or {})}
+
+
+def _source_failures(source_results: list[SourceResult]) -> list[dict[str, Any]]:
+    failures: list[dict[str, Any]] = []
+    for result in source_results:
+        if result.ok or result.status == "disabled":
+            continue
+        failures.append(
+            {
+                "source": result.source,
+                "role": result.role,
+                "status": result.status,
+                "error": result.error,
+            }
+        )
+    return failures
+
+
+def _similar_title_warnings(items: list[NewsItem], threshold: float) -> list[str]:
+    warnings: list[str] = []
+    for index, left in enumerate(items):
+        left_title = left.title or left.title_raw
+        for right in items[index + 1 :]:
+            right_title = right.title or right.title_raw
+            if len(_title_tokens(left_title)) < 2 or len(_title_tokens(right_title)) < 2:
+                continue
+            ratio = difflib.SequenceMatcher(None, left_title.lower(), right_title.lower()).ratio()
+            if ratio >= threshold:
+                warnings.append(f"final_title_similarity:{left.id}:{right.id}:{ratio:.3f}")
+    return warnings
+
+
+def evaluate_quality_gate(
+    items: list[NewsItem],
+    *,
+    source_results: list[SourceResult],
+    reports: dict[str, Any],
+    config: dict[str, Any] | None = None,
+) -> dict[str, Any]:
+    config = _config(config)
+    warnings: list[str] = []
+    blocking_errors: list[str] = []
+
+    stage3_report = reports.get("stage3", {}) or {}
+    min_items = int(config["warn_when_stage3_candidates_zero_min_items"])
+    if len(items) > min_items and int(stage3_report.get("candidate_group_count", 0)) == 0:
+        warnings.append("stage3_candidates_zero")
+
+    failures = _source_failures(source_results)
+    if bool(config["warn_on_enabled_source_failure"]):
+        for failure in failures:
+            warnings.append(f"enabled_source_failed:{failure['source']}:{failure['status']}")
+
+    required_sources = set(config.get("required_sources") or [])
+    if bool(config["block_on_required_source_failure"]):
+        for failure in failures:
+            if failure["source"] in required_sources:
+                blocking_errors.append(f"required_source_failed:{failure['source']}:{failure['status']}")
+
+    title_threshold = float(config["warn_on_final_title_similarity"])
+    if title_threshold > 0:
+        warnings.extend(_similar_title_warnings(items, title_threshold))
+
+    return {
+        "input_count": len(items),
+        "warnings": warnings,
+        "blocking_errors": blocking_errors,
+        "source_failures": failures,
+        "quality_gate_failed": bool(blocking_errors),
+    }
diff --git a/ai_daily_report/runner.py b/ai_daily_report/runner.py
index 293b102..b75e8f2 100644
--- a/ai_daily_report/runner.py
+++ b/ai_daily_report/runner.py
@@ -104,6 +104,11 @@ def run_daily_report(
     cross_day_config = pipeline_config.get("cross_day_dedup", {}) or {}
     cross_day_enabled = bool(cross_day_config.get("enabled", True))
     cross_day_max_age_days = int(cross_day_config.get("max_age_days", 7))
+    semantic_dedup_max_deletion_ratio = float(pipeline_config.get("semantic_dedup_max_deletion_ratio", 0.5))
+    rewrite_batch_size = int(pipeline_config.get("rewrite_batch_size", 30))
+    semantic_candidate_recall_config = pipeline_config.get("semantic_candidate_recall", {}) or {}
+    quality_gate_config = pipeline_config.get("quality_gate", {}) or {}
+    publish_idempotency_config = pipeline_config.get("publish_idempotency", {}) or {}
     configured_history_path = history_path or Path(
         str(cross_day_config.get("history_path") or "~/.hermes/scripts/ai_morning_out/published_urls.json")
     ).expanduser()
@@ -119,7 +124,13 @@ def run_daily_report(
 
         def fetcher(config: SourceConfig, current_date: str) -> list[dict[str, Any]]:
             source_fetcher = get_source_fetcher(config.type)
-            return source_fetcher(config, current_date, fetch_text)
+            def configured_fetch_text(url: str, timeout_seconds: int) -> str:
+                try:
+                    return fetch_text(url, timeout_seconds, retries=config.retries)
+                except TypeError:
+                    return fetch_text(url, timeout_seconds)
+
+            return source_fetcher(config, current_date, configured_fetch_text)
 
     else:
         raise ValueError("source_mode must be 'mock' or 'live'")
@@ -156,6 +167,11 @@ def run_daily_report(
         published_urls=published_urls,
         cross_day_dedup_enabled=cross_day_enabled,
         cross_day_dedup_max_age_days=cross_day_max_age_days,
+        semantic_dedup_max_deletion_ratio=semantic_dedup_max_deletion_ratio,
+        rewrite_batch_size=rewrite_batch_size,
+        semantic_candidate_recall_config=semantic_candidate_recall_config,
+        quality_gate_config=quality_gate_config,
+        publish_idempotency_config=publish_idempotency_config,
     )
 
     if cross_day_enabled and result["publish"].mode == "publish" and result["publish"].status == "ok":
@@ -173,9 +189,15 @@ def run_daily_report(
         json.dumps(result["reports"], ensure_ascii=False, indent=2, default=_json_default),
         encoding="utf-8",
     )
+    for artifact_name, artifact_value in result.get("artifacts", {}).items():
+        (run_dir / f"{artifact_name}.json").write_text(
+            json.dumps(artifact_value, ensure_ascii=False, indent=2, default=_json_default),
+            encoding="utf-8",
+        )
     return {
         "run_dir": str(run_dir),
         "markdown": result["markdown"],
         "reports": result["reports"],
         "publish": result["publish"],
+        "artifacts": result.get("artifacts", {}),
     }
diff --git a/docs/plans/2026-06-10-ai-daily-full-chain-optimization.md b/docs/plans/2026-06-10-ai-daily-full-chain-optimization.md
new file mode 100644
index 0000000..8aed782
--- /dev/null
+++ b/docs/plans/2026-06-10-ai-daily-full-chain-optimization.md
@@ -0,0 +1,130 @@
+# AI Daily Full Chain Optimization Implementation Plan
+
+> **For Claude:** REQUIRED SUB-SKILL: Use superpowers:executing-plans to implement this plan task-by-task.
+
+**Goal:** Add the first quality safety layer for the AI daily report pipeline: semantic candidate recall, quality gate reporting, stage snapshots, and effective pipeline configuration.
+
+**Architecture:** Keep the existing stage functions and add a rule-based Stage 2.8 between cross-day URL dedupe and LLM semantic dedupe. Quality gate stays deterministic and report-only for dry-run visibility, while publish blocking can consume its `blocking_errors` through the existing Stage 7/8 guard path. Runner persists stage artifacts from the pipeline result without changing generated content.
+
+**Tech Stack:** Python standard library, `unittest`, existing dataclass models and pipeline modules.
+
+---
+
+### Task 1: Make Pipeline Config Effective
+
+**Files:**
+- Modify: `ai_daily_report/pipeline.py`
+- Modify: `ai_daily_report/runner.py`
+- Test: `tests/test_stage0_to_4_pipeline.py`
+- Test: `tests/test_runner.py`
+
+**Step 1: Write failing tests**
+
+Use existing tests that call `run_stage0_to_stage4(..., semantic_dedup_max_deletion_ratio=0.1, rewrite_batch_size=1)` and expect Stage 4 `batch_count == 3`.
+
+**Step 2: Run tests to verify failure**
+
+Run: `python -m pytest tests/test_stage0_to_4_pipeline.py tests/test_runner.py -q`
+
+Expected: failure from unexpected keyword arguments or ignored config.
+
+**Step 3: Implement minimal code**
+
+Thread `semantic_dedup_max_deletion_ratio` into `semantic_dedup_items()` and `rewrite_batch_size` into `rewrite_items()`. Read both from `pipeline.json` in `runner.py`.
+
+**Step 4: Verify**
+
+Run the same tests and expect pass.
+
+### Task 2: Add Stage 2.8 Candidate Recall
+
+**Files:**
+- Create: `ai_daily_report/candidate_recall.py`
+- Modify: `ai_daily_report/pipeline.py`
+- Test: `tests/test_candidate_recall.py`
+- Test: `tests/test_stage0_to_4_pipeline.py`
+
+**Step 1: Write failing tests**
+
+Add tests proving related Claude Fable/Mythos items are recalled even when Stage 2 title candidates are empty, while unrelated Gemini/Gemma items are not grouped by company name alone.
+
+**Step 2: Run tests to verify failure**
+
+Run: `python -m pytest tests/test_candidate_recall.py tests/test_stage0_to_4_pipeline.py -q`
+
+Expected: import failure for the new module or zero recalled candidates.
+
+**Step 3: Implement minimal code**
+
+Use deterministic title similarity, token Jaccard, summary Jaccard, and strong entity overlap to produce candidate groups with `item_ids`, `reason`, `score`, and evidence fields.
+
+**Step 4: Verify**
+
+Run targeted tests and expect pass.
+
+### Task 3: Add Quality Gate Reporting
+
+**Files:**
+- Create: `ai_daily_report/quality_gate.py`
+- Modify: `ai_daily_report/pipeline.py`
+- Test: `tests/test_quality_gate.py`
+
+**Step 1: Write failing tests**
+
+Add tests for warnings when Stage 3 candidates are zero for large item sets, enabled sources fail, and required sources fail.
+
+**Step 2: Run tests to verify failure**
+
+Run: `python -m pytest tests/test_quality_gate.py -q`
+
+Expected: import failure for the new module.
+
+**Step 3: Implement minimal code**
+
+Return a report with `warnings`, `blocking_errors`, `source_failures`, and `quality_gate_failed`. Add it after Stage 7 and propagate blocking errors into Stage 7 before publish.
+
+**Step 4: Verify**
+
+Run quality gate and publish-path tests.
+
+### Task 4: Persist Stage Snapshots
+
+**Files:**
+- Modify: `ai_daily_report/pipeline.py`
+- Modify: `ai_daily_report/runner.py`
+- Test: `tests/test_runner.py`
+
+**Step 1: Write failing tests**
+
+Assert that a mock run writes `stage0_sources.json`, `stage1_items.json`, `stage2_items.json`, `stage2_5_items.json`, `stage2_8_candidates.json`, `stage3_items.json`, `stage4_items.json`, and `quality_gate.json`.
+
+**Step 2: Run tests to verify failure**
+
+Run: `python -m pytest tests/test_runner.py -q`
+
+Expected: snapshot files are missing.
+
+**Step 3: Implement minimal code**
+
+Have pipeline results carry an `artifacts` dict and have runner serialize the requested JSON files using the existing dataclass serializer.
+
+**Step 4: Verify**
+
+Run runner tests and inspect generated files through assertions.
+
+### Task 5: Full Regression
+
+**Files:**
+- All touched files
+
+**Step 1: Run targeted tests**
+
+Run: `python -m pytest tests/test_candidate_recall.py tests/test_quality_gate.py tests/test_stage0_to_4_pipeline.py tests/test_runner.py -q`
+
+**Step 2: Run full test suite**
+
+Run: `python -m pytest -q`
+
+**Step 3: Fix regressions**
+
+Fix only issues caused by this change set.
diff --git a/tests/test_candidate_recall.py b/tests/test_candidate_recall.py
new file mode 100644
index 0000000..9284e75
--- /dev/null
+++ b/tests/test_candidate_recall.py
@@ -0,0 +1,79 @@
+import unittest
+
+from ai_daily_report.candidate_recall import recall_semantic_candidates
+from ai_daily_report.models import NewsItem
+from ai_daily_report.normalize import normalize_title
+
+
+def item(item_id, title, summary):
+    return NewsItem(
+        id=item_id,
+        source_group="AI HOT",
+        source_label="AI HOT",
+        source_role="primary",
+        source_priority=10,
+        title_raw=title,
+        title_norm=normalize_title(title),
+        summary_raw=summary,
+        url=f"https://example.com/{item_id}",
+        canonical_url=f"https://example.com/{item_id}",
+    )
+
+
+class CandidateRecallTests(unittest.TestCase):
+    def test_recalls_shared_event_entities_when_titles_are_not_stage2_similar(self):
+        items = [
+            item(
+                "a",
+                "Anthropic 被曝开发 Claude Fable",
+                "Anthropic 正在开发名为 Claude Fable 和 Claude Mythos 的新产品。",
+            ),
+            item(
+                "b",
+                "Claude Mythos 进入内部测试",
+                "Anthropic 的 Claude Mythos 与 Claude Fable 面向内容生成场景。",
+            ),
+            item(
+                "c",
+                "Gemini CLI 发布更新",
+                "Google 为 Gemini CLI 增加新的开发者命令。",
+            ),
+        ]
+
+        candidates, report = recall_semantic_candidates(items, existing_candidates=[])
+
+        candidate_sets = [set(candidate["item_ids"]) for candidate in candidates]
+        self.assertIn({"a", "b"}, candidate_sets)
+        self.assertNotIn({"a", "c"}, candidate_sets)
+        self.assertEqual(report["candidate_group_count"], 1)
+        self.assertEqual(candidates[0]["reason"], "strong_entity_overlap")
+
+    def test_does_not_group_same_company_different_products_without_event_overlap(self):
+        items = [
+            item("gemini", "Google 发布 Gemini CLI", "Google 发布面向开发者的 Gemini CLI 工具。"),
+            item("gemma", "Google 开源 Gemma 3n", "Google 开源 Gemma 3n 模型，面向端侧部署。"),
+        ]
+
+        candidates, report = recall_semantic_candidates(items, existing_candidates=[])
+
+        self.assertEqual(candidates, [])
+        self.assertEqual(report["candidate_group_count"], 0)
+
+    def test_preserves_existing_candidates_and_adds_new_ones_without_duplicates(self):
+        items = [
+            item("a", "Anthropic 发布 Claude Fable", "Claude Fable 与 Claude Mythos 同时曝光。"),
+            item("b", "Claude Mythos 新功能曝光", "Claude Mythos 和 Claude Fable 是 Anthropic 新项目。"),
+        ]
+
+        candidates, report = recall_semantic_candidates(
+            items,
+            existing_candidates=[{"item_ids": ["a", "b"], "reason": "title_similarity"}],
+        )
+
+        self.assertEqual(len(candidates), 1)
+        self.assertEqual(candidates[0]["reason"], "title_similarity")
+        self.assertEqual(report["existing_candidate_group_count"], 1)
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_clients.py b/tests/test_clients.py
index ccf9e9d..880b94a 100644
--- a/tests/test_clients.py
+++ b/tests/test_clients.py
@@ -1,8 +1,9 @@
 import json
 import unittest
+from urllib.error import HTTPError
 from unittest.mock import patch
 
-from ai_daily_report.clients import BlogApiClient, OpenAICompatibleClient, fetch_text
+from ai_daily_report.clients import FetchTextError, BlogApiClient, OpenAICompatibleClient, fetch_text
 
 
 class FakeResponse:
@@ -26,6 +27,28 @@ class ClientTests(unittest.TestCase):
         with patch("urllib.request.urlopen", return_value=FakeResponse("ok".encode("utf-8"))):
             self.assertEqual(fetch_text("https://example.com", 1), "ok")
 
+    def test_fetch_text_retries_transient_http_errors(self):
+        responses = [
+            HTTPError("https://example.com", 503, "Service Unavailable", {}, None),
+            FakeResponse("ok".encode("utf-8")),
+        ]
+        with patch("urllib.request.urlopen", side_effect=responses) as urlopen:
+            self.assertEqual(fetch_text("https://example.com", 1, retries=1, backoff_seconds=0), "ok")
+
+        self.assertEqual(urlopen.call_count, 2)
+
+    def test_fetch_text_does_not_retry_404_and_classifies_error(self):
+        with patch(
+            "urllib.request.urlopen",
+            side_effect=HTTPError("https://example.com", 404, "Not Found", {}, None),
+        ) as urlopen:
+            with self.assertRaises(FetchTextError) as context:
+                fetch_text("https://example.com", 1, retries=2, backoff_seconds=0)
+
+        self.assertEqual(urlopen.call_count, 1)
+        self.assertEqual(context.exception.error_type, "http_404")
+        self.assertEqual(context.exception.http_status, 404)
+
     def test_openai_compatible_client_returns_message_content(self):
         body = json.dumps({"choices": [{"message": {"content": "hello"}}]}).encode("utf-8")
         with patch("urllib.request.urlopen", return_value=FakeResponse(body)):
diff --git a/tests/test_quality_gate.py b/tests/test_quality_gate.py
new file mode 100644
index 0000000..ef0384f
--- /dev/null
+++ b/tests/test_quality_gate.py
@@ -0,0 +1,78 @@
+import unittest
+
+from ai_daily_report.models import NewsItem, SourceResult
+from ai_daily_report.quality_gate import evaluate_quality_gate
+
+
+def news_item(item_id, title="Story"):
+    return NewsItem(
+        id=item_id,
+        source_group="AI HOT",
+        source_label="AI HOT",
+        source_role="primary",
+        source_priority=10,
+        title_raw=f"{title} {item_id}",
+        title_norm=f"{title} {item_id}".lower(),
+        summary_raw="summary",
+        url=f"https://example.com/{item_id}",
+        canonical_url=f"https://example.com/{item_id}",
+    )
+
+
+class QualityGateTests(unittest.TestCase):
+    def test_warns_when_stage3_candidates_zero_for_large_item_set(self):
+        items = [news_item(str(index)) for index in range(31)]
+        report = evaluate_quality_gate(
+            items,
+            source_results=[],
+            reports={"stage3": {"candidate_group_count": 0}},
+            config={"warn_when_stage3_candidates_zero_min_items": 30},
+        )
+
+        self.assertIn("stage3_candidates_zero", report["warnings"])
+        self.assertEqual(report["blocking_errors"], [])
+
+    def test_warns_on_enabled_source_failure(self):
+        report = evaluate_quality_gate(
+            [news_item("a")],
+            source_results=[
+                SourceResult(
+                    source="橘鸦AI早报",
+                    role="supplement",
+                    ok=False,
+                    status="error",
+                    error="HTTPError: 404",
+                )
+            ],
+            reports={"stage3": {"candidate_group_count": 1}},
+            config={"warn_on_enabled_source_failure": True},
+        )
+
+        self.assertIn("enabled_source_failed:橘鸦AI早报:error", report["warnings"])
+        self.assertEqual(report["source_failures"][0]["source"], "橘鸦AI早报")
+
+    def test_blocks_required_source_failure_when_configured(self):
+        report = evaluate_quality_gate(
+            [news_item("a")],
+            source_results=[
+                SourceResult(
+                    source="AI HOT",
+                    role="primary",
+                    ok=False,
+                    status="timeout",
+                    error="TimeoutError",
+                )
+            ],
+            reports={"stage3": {"candidate_group_count": 1}},
+            config={
+                "block_on_required_source_failure": True,
+                "required_sources": ["AI HOT"],
+            },
+        )
+
+        self.assertIn("required_source_failed:AI HOT:timeout", report["blocking_errors"])
+        self.assertTrue(report["quality_gate_failed"])
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_runner.py b/tests/test_runner.py
index 9f7249a..978213a 100644
--- a/tests/test_runner.py
+++ b/tests/test_runner.py
@@ -22,8 +22,128 @@ class RunnerTests(unittest.TestCase):
             run_dir = Path(result["run_dir"])
             self.assertTrue((run_dir / "blog_markdown.md").exists())
             self.assertTrue((run_dir / "run_report.json").exists())
+            for filename in [
+                "stage0_sources.json",
+                "stage1_items.json",
+                "stage2_items.json",
+                "stage2_5_items.json",
+                "stage2_8_candidates.json",
+                "stage3_items.json",
+                "stage4_items.json",
+                "quality_gate.json",
+            ]:
+                self.assertTrue((run_dir / filename).exists(), filename)
             self.assertEqual(result["reports"]["stage8"]["status"], "ok")
 
+    def test_run_daily_report_passes_pipeline_config_to_stage_functions(self):
+        class FakeLlmClient:
+            def chat(self, prompt):
+                payload = json.loads(prompt)
+                if "candidates" in payload:
+                    first_candidate = payload["candidates"][0]["item_ids"]
+                    return json.dumps(
+                        {
+                            "duplicate_groups": [
+                                {
+                                    "keep_id": first_candidate[0],
+                                    "remove_ids": [first_candidate[1]],
+                                    "confidence": "high",
+                                    "reason": "same event",
+                                }
+                            ],
+                            "not_duplicates": [],
+                            "uncertain": [],
+                        }
+                    )
+                if "allowed_sections" in payload:
+                    return json.dumps(
+                        {
+                            "rewrites": [
+                                {
+                                    "id": item["id"],
+                                    "title": item["title_raw"],
+                                    "summary": item["summary_raw"],
+                                    "flags": [],
+                                }
+                                for item in payload["items"]
+                            ]
+                        }
+                    )
+                return json.dumps(
+                    {
+                        "intro": "Daily intro.",
+                        "theme": "Pipeline config.",
+                        "threads": [
+                            {
+                                "title": "Config thread",
+                                "text": "Config values reached the pipeline.",
+                                "item_ids": [payload["items"][0]["id"]],
+                                "kind": "thread",
+                            }
+                        ],
+                        "conclusion": "Done.",
+                    }
+                )
+
+        with TemporaryDirectory() as temp_dir:
+            temp_path = Path(temp_dir)
+            pipeline_config = temp_path / "pipeline.json"
+            pipeline_config.write_text(
+                json.dumps(
+                    {
+                        "semantic_dedup_max_deletion_ratio": 0.1,
+                        "rewrite_batch_size": 1,
+                        "cross_day_dedup": {"enabled": False},
+                    }
+                ),
+                encoding="utf-8",
+            )
+            source_config = temp_path / "sources.json"
+            source_config.write_text(
+                json.dumps(
+                    [
+                        {
+                            "name": "AI HOT",
+                            "type": "rss",
+                            "url": "https://feed.example/rss",
+                            "role": "primary",
+                            "priority": 10,
+                            "enabled": True,
+                        }
+                    ]
+                ),
+                encoding="utf-8",
+            )
+
+            def fetch_text(url, timeout):
+                return """<?xml version="1.0"?><rss><channel>
+<item><title>Anthropic launches Claude Code</title><link>https://example.com/a</link><description>Anthropic launches Claude Code for developers.</description></item>
+<item><title>Anthropic launch Claude Code</title><link>https://example.com/b</link><description>Anthropic launch Claude Code for coding.</description></item>
+<item><title>Gemini CLI update</title><link>https://example.com/c</link><description>Google updates Gemini CLI.</description></item>
+</channel></rss>"""
+
+            result = run_daily_report(
+                run_date="2026-06-10",
+                mode="dry-run",
+                source_mode="live",
+                llm_mode="live",
+                out_dir=temp_path / "out",
+                base_url="https://blog.example",
+                sources_path=source_config,
+                pipeline_path=pipeline_config,
+                fetch_text=fetch_text,
+                env={
+                    "LLM_API_KEY": "test-key",
+                    "LLM_BASE_URL": "https://llm.example/v1",
+                    "LLM_MODEL": "test-model",
+                },
+                llm_client_factory=lambda **config: FakeLlmClient(),
+            )
+
+        self.assertTrue(result["reports"]["stage3"]["skipped_for_deletion_ratio"])
+        self.assertEqual(result["reports"]["stage4"]["batch_count"], 3)
+        self.assertIn("quality_gate", result["reports"])
+
     def test_run_daily_report_live_sources_can_use_config_and_fetch_text(self):
         with TemporaryDirectory() as temp_dir:
             out_dir = Path(temp_dir) / "out"
diff --git a/tests/test_stage0_collect.py b/tests/test_stage0_collect.py
index 7d31c20..90b431c 100644
--- a/tests/test_stage0_collect.py
+++ b/tests/test_stage0_collect.py
@@ -1,5 +1,6 @@
 import unittest
 
+from ai_daily_report.clients import FetchTextError
 from ai_daily_report.collect import collect_sources
 from ai_daily_report.models import SourceConfig
 
@@ -44,6 +45,18 @@ class Stage0CollectTests(unittest.TestCase):
         self.assertEqual(report["failed_source_count"], 1)
         self.assertEqual(report["raw_item_count"], 1)
 
+    def test_collect_sources_records_fetch_text_error_metadata(self):
+        configs = [SourceConfig(name="RSS", type="rss", retries=2)]
+
+        def fetcher(config, run_date):
+            raise FetchTextError("http_404", "HTTPError: 404", http_status=404, attempts=1)
+
+        results, report = collect_sources(configs, "2026-06-10", fetcher=fetcher)
+
+        self.assertEqual(results[0].status, "http_404")
+        self.assertEqual(results[0].retry_count, 0)
+        self.assertIn("http_404", report["error_types"]["RSS"])
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/test_stage0_to_4_pipeline.py b/tests/test_stage0_to_4_pipeline.py
index 5295922..0768835 100644
--- a/tests/test_stage0_to_4_pipeline.py
+++ b/tests/test_stage0_to_4_pipeline.py
@@ -6,6 +6,81 @@ from ai_daily_report.models import PublishedUrlEntry, PublishedUrls
 
 
 class Stage0To4PipelineTests(unittest.TestCase):
+    def test_run_stage0_to_stage4_passes_semantic_and_rewrite_config(self):
+        configs = [{"name": "AI HOT", "type": "fake", "role": "primary", "priority": 10}]
+        seen = {}
+
+        def fetcher(config, run_date):
+            return [
+                {
+                    "title_raw": "Anthropic launches Claude Code",
+                    "summary_raw": "Anthropic launches Claude Code for developers.",
+                    "url": "https://example.com/a",
+                    "source_label": config.name,
+                },
+                {
+                    "title_raw": "Anthropic launch Claude Code",
+                    "summary_raw": "Anthropic launch Claude Code for coding.",
+                    "url": "https://example.com/b",
+                    "source_label": config.name,
+                },
+                {
+                    "title_raw": "Gemini CLI update",
+                    "summary_raw": "Google updates Gemini CLI.",
+                    "url": "https://example.com/c",
+                    "source_label": config.name,
+                },
+            ]
+
+        def semantic_llm_call(prompt):
+            payload = json.loads(prompt)
+            seen["semantic_prompt"] = payload
+            first_candidate = payload["candidates"][0]["item_ids"]
+            return json.dumps(
+                {
+                    "duplicate_groups": [
+                        {
+                            "keep_id": first_candidate[0],
+                            "remove_ids": [first_candidate[1]],
+                            "confidence": "high",
+                            "reason": "same event",
+                        }
+                    ],
+                    "not_duplicates": [],
+                    "uncertain": [],
+                }
+            )
+
+        def rewrite_llm_call(prompt):
+            payload = json.loads(prompt)
+            seen.setdefault("rewrite_batches", []).append(len(payload["items"]))
+            return json.dumps(
+                {
+                    "rewrites": [
+                        {
+                            "id": item["id"],
+                            "title": item["title_raw"],
+                            "summary": item["summary_raw"],
+                            "flags": [],
+                        }
+                        for item in payload["items"]
+                    ]
+                }
+            )
+
+        result = run_stage0_to_stage4(
+            configs,
+            "2026-06-10",
+            fetcher=fetcher,
+            semantic_llm_call=semantic_llm_call,
+            rewrite_llm_call=rewrite_llm_call,
+            semantic_dedup_max_deletion_ratio=0.1,
+            rewrite_batch_size=1,
+        )
+
+        self.assertTrue(result["reports"]["stage3"]["skipped_for_deletion_ratio"])
+        self.assertEqual(seen["rewrite_batches"], [1, 1, 1])
+
     def test_run_stage0_to_stage4_semantic_dedupes_and_rewrites(self):
         configs = [
             {"name": "AI HOT", "type": "fake", "role": "primary", "priority": 10},
@@ -127,6 +202,67 @@ class Stage0To4PipelineTests(unittest.TestCase):
         self.assertEqual(result["reports"]["stage2_5"]["removed_count"], 1)
         self.assertEqual([entry["title_raw"] for entry in seen_rewrite_payloads[0]["items"]], ["Fresh story"])
 
+    def test_run_stage0_to_stage4_uses_stage2_8_recalled_candidates(self):
+        configs = [{"name": "AI HOT", "type": "fake", "role": "primary", "priority": 10}]
+        seen = {}
+
+        def fetcher(config, run_date):
+            return [
+                {
+                    "title_raw": "Anthropic 被曝开发 Claude Fable",
+                    "summary_raw": "Anthropic 正在开发名为 Claude Fable 和 Claude Mythos 的新产品。",
+                    "url": "https://example.com/fable",
+                    "source_label": config.name,
+                },
+                {
+                    "title_raw": "Claude Mythos 进入内部测试",
+                    "summary_raw": "Anthropic 的 Claude Mythos 与 Claude Fable 面向内容生成场景。",
+                    "url": "https://example.com/mythos",
+                    "source_label": config.name,
+                },
+                {
+                    "title_raw": "Google 开源 Gemma 3n",
+                    "summary_raw": "Google 开源 Gemma 3n 模型，面向端侧部署。",
+                    "url": "https://example.com/gemma",
+                    "source_label": config.name,
+                },
+            ]
+
+        def semantic_llm_call(prompt):
+            payload = json.loads(prompt)
+            seen["candidate_count"] = len(payload["candidates"])
+            seen["candidate_reasons"] = [candidate["reason"] for candidate in payload["candidates"]]
+            return json.dumps({"duplicate_groups": [], "not_duplicates": [], "uncertain": []})
+
+        def rewrite_llm_call(prompt):
+            payload = json.loads(prompt)
+            return json.dumps(
+                {
+                    "rewrites": [
+                        {
+                            "id": entry["id"],
+                            "title": entry["title_raw"],
+                            "summary": entry["summary_raw"],
+                            "flags": [],
+                        }
+                        for entry in payload["items"]
+                    ]
+                },
+                ensure_ascii=False,
+            )
+
+        result = run_stage0_to_stage4(
+            configs,
+            "2026-06-10",
+            fetcher=fetcher,
+            semantic_llm_call=semantic_llm_call,
+            rewrite_llm_call=rewrite_llm_call,
+        )
+
+        self.assertEqual(seen["candidate_count"], 1)
+        self.assertIn("strong_entity_overlap", seen["candidate_reasons"])
+        self.assertEqual(result["reports"]["stage2_8"]["added_candidate_group_count"], 1)
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/test_stage8_publish.py b/tests/test_stage8_publish.py
index 169c6ae..630f20b 100644
--- a/tests/test_stage8_publish.py
+++ b/tests/test_stage8_publish.py
@@ -7,9 +7,10 @@ from ai_daily_report.publish import load_published_urls, publish_markdown, updat
 
 
 class FakeBlogClient:
-    def __init__(self):
+    def __init__(self, existing_post=None):
         self.created_payload = None
         self.published_slug = None
+        self.existing_post = existing_post
 
     def create_post(self, payload):
         self.created_payload = payload
@@ -18,6 +19,9 @@ class FakeBlogClient:
     def publish_post(self, slug):
         self.published_slug = slug
 
+    def get_post_by_slug(self, slug):
+        return self.existing_post
+
 
 class Stage8PublishTests(unittest.TestCase):
     def test_publish_markdown_dry_run_does_not_call_client(self):
@@ -74,6 +78,45 @@ class Stage8PublishTests(unittest.TestCase):
         self.assertEqual(client.published_slug, "ai-2026-06-04")
         self.assertEqual(result.blog_url, "https://blog.example/posts/ai-2026-06-04")
 
+    def test_publish_markdown_returns_already_published_for_same_slug_and_content(self):
+        markdown = "## 导览\n\n> ok"
+        client = FakeBlogClient(existing_post={"slug": "ai-2026-06-04", "content": markdown})
+
+        result = publish_markdown(
+            title="AI日报 · 2026-06-04",
+            markdown=markdown,
+            tags=["AI日报"],
+            slug="ai-2026-06-04",
+            base_url="https://blog.example",
+            mode="publish",
+            markdown_report={"blocking_errors": []},
+            client=client,
+            idempotency_config={"enabled": True},
+        )
+
+        self.assertEqual(result.status, "already_published")
+        self.assertIsNone(client.created_payload)
+        self.assertIsNone(client.published_slug)
+
+    def test_publish_markdown_blocks_existing_slug_with_different_content(self):
+        client = FakeBlogClient(existing_post={"slug": "ai-2026-06-04", "content": "old"})
+
+        result = publish_markdown(
+            title="AI日报 · 2026-06-04",
+            markdown="new",
+            tags=["AI日报"],
+            slug="ai-2026-06-04",
+            base_url="https://blog.example",
+            mode="publish",
+            markdown_report={"blocking_errors": []},
+            client=client,
+            idempotency_config={"enabled": True},
+        )
+
+        self.assertEqual(result.status, "blocked")
+        self.assertIn("slug_already_exists", result.error)
+        self.assertIsNone(client.created_payload)
+
     def test_update_published_urls_writes_canonical_urls_for_final_items(self):
         with TemporaryDirectory() as temp_dir:
             history_path = Path(temp_dir) / "published_urls.json"