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# src/deep_research.py
"""
IterResearch-style deep research engine.
Implements an iterative Think→Search→Extract→Synthesize loop where the LLM
drives every decision: what to search, what's relevant, what's missing, and
when to stop. Inspired by Alibaba's IterResearch approach.
"""
import asyncio
import json
import logging
import re
import time
from typing import Callable, Dict, List, Optional, Set
from src.research_utils import strip_thinking, is_low_quality
from src.goal_based_extractor import EXTRACTOR_PROMPT
logger = logging.getLogger(__name__)
# ---------------------------------------------------------------------------
# Prompts
# ---------------------------------------------------------------------------
RESEARCH_PLAN_PROMPT = """\
You are a research strategist. Before searching, analyze this question and create a research plan.
**Question:** {question}
Break this question down:
1. What are the key sub-topics that need to be covered for a comprehensive answer?
2. What specific data points, facts, or perspectives should we look for?
3. What would a complete, high-quality answer include?
Return a JSON object with:
- "sub_questions": Array of 3-6 specific sub-questions to investigate
- "key_topics": Array of key topics/angles to cover
- "success_criteria": One sentence describing what a complete answer looks like
Example:
{{
"sub_questions": ["What is the cost of living in X?", "How is the healthcare system?"],
"key_topics": ["economy", "healthcare", "safety", "culture"],
"success_criteria": "A balanced comparison covering cost, quality of life, and practical considerations."
}}
"""
QUERY_GEN_PROMPT = """\
You are a research assistant planning web searches.
**Original question:** {question}
**Research plan:**
{research_plan}
**What we know so far:**
{report}
**Round:** {round_num}
Generate {num_queries} focused search queries that will help answer the question.
{round_instruction}
Return ONLY a JSON array of query strings, nothing else.
Example: ["query one", "query two", "query three"]
"""
SYNTHESIZE_PROMPT = """\
You are updating an evolving research report.
**Original question:** {question}
**Current report:**
{report}
**New findings from this round:**
{new_findings}
Integrate the new findings into the existing report. Produce an updated, well-organized \
report that answers the original question as completely as possible given all evidence so far. \
Remove redundancy, resolve contradictions, and maintain logical flow. \
Keep source URLs as inline citations where relevant.
Write only the updated report — no preamble or meta-commentary.
"""
STOP_PROMPT = """\
You are deciding whether a research report is comprehensive enough.
**Original question:** {question}
**Current report:**
{report}
**Rounds completed:** {round_num}
Based on the report so far, do we have enough information to answer the question \
comprehensively? Consider:
- Are the key aspects of the question addressed?
- Are there obvious gaps or unanswered sub-questions?
- Is the evidence sufficient and from multiple sources?
Reply with ONLY "YES" or "NO" followed by a brief one-sentence reason.
Example: "YES — The report covers all major aspects with evidence from multiple sources."
Example: "NO — We still lack information about the economic impact."
"""
FINAL_REPORT_PROMPT = """\
Write a **long, detailed, comprehensive** research report answering this question:
**Question:** {question}
**All collected evidence and analysis:**
{report}
Requirements:
- Write at MINIMUM 1500 words — this should be a thorough, magazine-quality article
- Use clear ## headings and ### subheadings to organize into logical sections
- Each section should have multiple detailed paragraphs, not just bullet points
- Synthesize and analyze the information — explain WHY things matter, draw comparisons, provide context
- Include specific data points, numbers, and statistics from the evidence
- Include source URLs as inline citations [like this](url)
- Note where sources agree and where they disagree
- Add a brief executive summary at the top
- End with a clear conclusion that directly answers the question
- Write in an engaging, informative style — not dry or robotic
"""
CATEGORY_PROMPTS = {
"product": """IMPORTANT FORMAT OVERRIDE — this is a PRODUCT research report:
- Structure as a RANKED LIST of products/options (best first)
- For EACH product include: name as ### heading, approximate price, 2-3 sentence summary, **Pros:** bullet list, **Cons:** bullet list, **Where to buy:** URLs as links
- Start with a quick-compare markdown table of top picks (columns: Name, Price, Best For, Rating)
- End with a ## Verdict section picking Best Overall and Best Value
- Still include source citations inline""",
"comparison": """IMPORTANT FORMAT OVERRIDE — this is a COMPARISON report:
- Create a ## Comparison Table as a markdown table comparing ALL options across key criteria (rows = criteria, columns = options)
- Use checkmarks, ratings, or short values in cells
- Write a ## section per option with its strengths, weaknesses, and ideal use case
- End with ## Best For verdicts (e.g., "**Best for small teams:** Option A because...")
- Include a ## Shared Considerations section for things that apply to all options""",
"howto": """IMPORTANT FORMAT OVERRIDE — this is a HOW-TO guide:
- Start with ## Quick Guide — a super concise numbered list (one line per step, no details, just the action). Example: 1. Install X 2. Run Y 3. Configure Z
- Then ## Prerequisites listing what's needed before starting
- Then the detailed steps: ## Step 1: ..., ## Step 2: ...
- Each step should have a clear heading and detailed instructions
- Use blockquotes (> ) for tips and warnings: > **Tip:** ... or > **Warning:** ...
- End with ## Common Mistakes section
- Add estimated time and difficulty level near the top""",
"factcheck": """IMPORTANT FORMAT OVERRIDE — this is a FACT-CHECK report:
- Start with ## The Claim restating what's being checked
- Create ## Evidence For and ## Evidence Against sections
- Each piece of evidence should be a ### with source name, what it found, and how strong the evidence is
- Include a ## Verdict section with one of: **Supported**, **Mixed Evidence**, or **Unsupported**
- End with ## Nuance & Caveats for important context and limitations
- Be balanced and cite sources for every claim""",
}
# ---------------------------------------------------------------------------
# DeepResearcher
# ---------------------------------------------------------------------------
class DeepResearcher:
"""
Iterative research engine following the IterResearch pattern.
Each round: LLM generates queries → SearXNG search → LLM extracts from
top pages → LLM synthesizes into evolving report → LLM decides continue/stop.
"""
def __init__(
self,
llm_endpoint: str,
llm_model: str,
llm_headers: Optional[Dict] = None,
max_rounds: int = 8,
max_time: int = 300,
max_urls_per_round: int = 3,
max_content_chars: int = 15000,
max_report_tokens: int = 8192,
min_rounds: int = 2,
max_empty_rounds: int = 2,
synthesis_window: int = 10,
progress_callback: Optional[Callable] = None,
search_provider: Optional[str] = None,
category: Optional[str] = None,
):
self.llm_endpoint = llm_endpoint
self.llm_model = llm_model
self.llm_headers = llm_headers
self.search_provider_override = search_provider
self.category = category
self.max_rounds = max_rounds
self.max_time = max_time
self.max_urls_per_round = max_urls_per_round
self.max_content_chars = max_content_chars
self.max_report_tokens = max_report_tokens
self.min_rounds = min_rounds
self.max_empty_rounds = max_empty_rounds
self.synthesis_window = synthesis_window
self._progress = progress_callback
self._cancelled = False
self._start_time: float = 0
self.queries_used: Set[str] = set()
self.urls_fetched: Set[str] = set()
self.round_count: int = 0
# Track which search providers actually returned results during the
# run, in arrival order — surfaced in the visual report so users can
# see whether searxng / brave / tavily etc. carried the work.
self.providers_used: List[str] = []
self.findings: List[Dict] = []
self.evolving_report: str = ""
self.research_plan: str = ""
def cancel(self):
"""Request cooperative cancellation of the research loop."""
self._cancelled = True
# ------------------------------------------------------------------
# Public API
# ------------------------------------------------------------------
async def research(
self,
question: str,
prior_report: str = "",
prior_findings: Optional[List[Dict]] = None,
prior_urls: Optional[Set[str]] = None,
) -> str:
"""Run iterative research and return a final report.
Args:
question: The research question.
prior_report: Previous report to continue from (for follow-up research).
prior_findings: Previous findings to build on.
prior_urls: URLs already visited (won't be re-fetched).
"""
self._start_time = time.time()
findings: List[Dict] = list(prior_findings) if prior_findings else []
report = prior_report or ""
# PLAN: Analyze the question and create a research strategy
if not prior_report:
self._emit(phase="planning")
self.research_plan = await self._create_plan(question)
logger.info(f"Research plan: {self.research_plan[:200]}")
else:
# Continuation — plan around the follow-up
self._emit(phase="planning")
self.research_plan = await self._create_plan(question)
logger.info(f"Continuation plan: {self.research_plan[:200]}")
if not self.category and not prior_report:
self.category = await self._classify_category(question)
if self.category:
logger.info(f"Auto-detected category: {self.category}")
if prior_urls:
self.urls_fetched.update(prior_urls)
self.findings = findings # expose for handler
consecutive_empty_rounds = 0
for round_num in range(1, self.max_rounds + 1):
self.round_count = round_num
if self._cancelled:
logger.info(f"Research cancelled after {round_num - 1} rounds")
break
if self._time_exceeded():
logger.info(f"Time limit reached after {round_num - 1} rounds")
break
logger.info(f"=== Research Round {round_num} ===")
self._emit(phase="searching", round=round_num, total_sources=len(self.urls_fetched))
# THINK: generate queries
queries = await self._generate_queries(question, report, round_num)
if not queries:
logger.warning(f"Round {round_num}: no queries generated, stopping")
break
self._emit(phase="searching", round=round_num, queries=len(queries),
query_preview=queries[0] if queries else "",
total_sources=len(self.urls_fetched))
# SEARCH + EXTRACT
round_findings = await self._search_and_extract(queries, question)
if round_findings:
findings.extend(round_findings)
consecutive_empty_rounds = 0
logger.info(f"Round {round_num}: extracted {len(round_findings)} findings")
self._emit(phase="reading", round=round_num,
new_sources=len(round_findings),
total_sources=len(self.urls_fetched),
total_findings=len(findings))
else:
consecutive_empty_rounds += 1
logger.info(f"Round {round_num}: no new findings ({consecutive_empty_rounds} consecutive empty)")
if consecutive_empty_rounds >= self.max_empty_rounds:
logger.warning(f"Search appears to be down — {self.max_empty_rounds} consecutive rounds with no results")
err_detail = getattr(self, '_last_search_error', 'unknown error')
self._emit(phase="error", message=f"Search engine unavailable: {err_detail}")
if not findings:
return (
f"**Search unavailable** — Web search failed after "
f"{round_num} rounds. Error: {err_detail}\n\n"
"Please check your search provider settings and ensure the service is running."
)
break
# SYNTHESIZE
if findings:
self._emit(phase="analyzing", round=round_num,
total_sources=len(self.urls_fetched),
total_findings=len(findings))
report = await self._synthesize(question, findings, report)
# DECIDE
if round_num >= self.min_rounds:
should_stop = await self._should_stop(question, report, round_num)
if should_stop:
logger.info(f"LLM decided to stop after round {round_num}")
break
# FINAL REPORT
self._emit(phase="writing", total_sources=len(self.urls_fetched),
total_findings=len(findings))
if not report:
return "No information could be gathered for this question."
self.evolving_report = report # preserve pre-synthesis report
final = await self._final_report(question, report)
elapsed = time.time() - self._start_time
logger.info(
f"Research complete: {self.round_count} rounds, "
f"{len(findings)} findings, {len(self.urls_fetched)} URLs, "
f"{elapsed:.1f}s"
)
return final
# ------------------------------------------------------------------
# LLM helper
# ------------------------------------------------------------------
async def _llm(self, messages: List[Dict], temperature: float = 0.3,
max_tokens: int = 4096, timeout: int = 60) -> str:
"""Call the LLM asynchronously and strip thinking tags."""
from src.llm_core import llm_call_async
response = await llm_call_async(
url=self.llm_endpoint,
model=self.llm_model,
messages=messages,
temperature=temperature,
max_tokens=max_tokens,
headers=self.llm_headers,
timeout=timeout,
)
return strip_thinking(response)
# ------------------------------------------------------------------
# PLAN: create research strategy
# ------------------------------------------------------------------
async def _create_plan(self, question: str) -> str:
"""LLM analyzes the question and creates a research plan."""
prompt = RESEARCH_PLAN_PROMPT.format(question=question)
try:
response = await self._llm(
[{"role": "user", "content": prompt}],
temperature=0.3,
max_tokens=1024,
timeout=30,
)
# Try to parse as JSON for structured plan
parsed = self._parse_json_object(response)
if parsed:
parts = []
if parsed.get("sub_questions"):
parts.append("Sub-questions: " + "; ".join(parsed["sub_questions"]))
if parsed.get("key_topics"):
parts.append("Key topics: " + ", ".join(parsed["key_topics"]))
if parsed.get("success_criteria"):
parts.append("Success: " + parsed["success_criteria"])
return "\n".join(parts) if parts else response
return response
except Exception as e:
logger.warning(f"Research planning failed: {e}")
self._emit(phase="warning", message="Planning step failed, proceeding with direct search")
return ""
async def _classify_category(self, question: str) -> Optional[str]:
"""Fast LLM call to classify the research question into a category."""
valid = ", ".join(CATEGORY_PROMPTS.keys())
prompt = (
f"Classify this research question into exactly ONE category.\n"
f"Categories: {valid}\n"
f"If none fit well, respond with: general\n\n"
f"Question: {question}\n\n"
f"Respond with ONLY the category name, nothing else."
)
try:
result = await self._llm(
[{"role": "user", "content": prompt}],
temperature=0, max_tokens=20, timeout=15,
)
cat = (result or "").strip().lower()
# Clean one-word answer first.
first = cat.split()[0].strip(".,\"'*:") if cat.split() else ""
if first in CATEGORY_PROMPTS:
return first
# Weak local models often wrap the label in preamble ("the category
# is product") — scan the whole reply for any known category word
# before giving up (which would default to the generic format).
for c in CATEGORY_PROMPTS:
if c in cat:
return c
return None
except Exception as e:
logger.warning(f"Category classification failed: {e}")
return None
# ------------------------------------------------------------------
# THINK: generate search queries
# ------------------------------------------------------------------
async def _generate_queries(self, question: str, report: str,
round_num: int) -> List[str]:
if round_num == 1:
num_queries = 4
round_instruction = (
"This is the first round — generate broad, diverse queries "
"that explore the key facets of the question."
)
else:
num_queries = 3
round_instruction = (
"We already have partial findings. Generate targeted follow-up "
"queries to fill gaps, verify claims, or explore specific aspects "
"that the report doesn't yet cover well."
)
prompt = QUERY_GEN_PROMPT.format(
question=question,
research_plan=self.research_plan or "(No plan — search broadly.)",
report=report or "(No findings yet.)",
round_num=round_num,
num_queries=num_queries,
round_instruction=round_instruction,
)
try:
response = await self._llm(
[{"role": "user", "content": prompt}],
temperature=0.5,
max_tokens=4096,
)
queries = self._parse_json_array(response)
# Deduplicate
new_queries = [q for q in queries if q not in self.queries_used]
self.queries_used.update(new_queries)
logger.info(f"Round {round_num} queries: {new_queries}")
return new_queries
except Exception as e:
logger.error(f"Query generation failed: {e}")
self._emit(phase="warning", message=f"Query generation failed: {e}")
return []
# ------------------------------------------------------------------
# SEARCH + EXTRACT
# ------------------------------------------------------------------
async def _search_and_extract(self, queries: List[str],
question: str) -> List[Dict]:
"""Search each query and extract relevant info from top results."""
all_findings: List[Dict] = []
# Search all queries in parallel
search_tasks = [self._search(q) for q in queries]
search_results = await asyncio.gather(*search_tasks, return_exceptions=True)
# Collect URLs to fetch from all search results
urls_to_fetch = []
for result in search_results:
if isinstance(result, Exception):
logger.warning(f"Search error: {result}")
continue
if not result:
continue
for r in result:
url = r.get("url", "")
if url and url not in self.urls_fetched:
urls_to_fetch.append(r)
self.urls_fetched.add(url)
if len(urls_to_fetch) >= self.max_urls_per_round * len(queries):
break
if self._cancelled or self._time_exceeded():
return all_findings
# Fetch and extract all URLs concurrently
extract_tasks = [
self._fetch_and_extract(r["url"], question, r.get("title", ""))
for r in urls_to_fetch
]
results_gathered = await asyncio.gather(*extract_tasks, return_exceptions=True)
for result in results_gathered:
if isinstance(result, Exception):
logger.warning(f"Extraction error: {result}")
continue
if result:
all_findings.append(result)
return all_findings
async def _search(self, query: str) -> List[Dict]:
"""Run a search query using the configured research search provider."""
try:
from src.search.providers import _get_search_settings
from src.search.core import _call_provider, _build_provider_chain
settings = _get_search_settings()
provider = (self.search_provider_override or "").strip()
if not provider:
provider = (settings.get("research_search_provider") or "").strip()
if not provider:
provider = settings.get("search_provider", "searxng")
if provider == "disabled":
logger.info("Search is disabled for research")
return []
# Try primary provider, then fallbacks
for prov in _build_provider_chain(provider):
try:
results = await asyncio.to_thread(_call_provider, prov, query, 10)
if results:
logger.info(f"Research search: {prov} returned {len(results)} results")
if prov not in self.providers_used:
self.providers_used.append(prov)
return results
except Exception as e:
logger.warning(f"Research search: {prov} failed: {e}")
self._last_search_error = f"{prov}: {e}"
return []
except Exception as e:
logger.error(f"Search failed for '{query}': {e}")
self._last_search_error = str(e)
return []
async def _fetch_and_extract(self, url: str, question: str,
title: str) -> Optional[Dict]:
"""Fetch a URL's content and use LLM to extract relevant info."""
display = title or url
self._emit(phase="reading", url=url, title=display,
total_sources=len(self.urls_fetched))
try:
from src.search import fetch_webpage_content
page = await asyncio.to_thread(fetch_webpage_content, url, 10)
except Exception as e:
logger.warning(f"Failed to fetch {url}: {e}")
return None
if not page.get("success") or not page.get("content"):
return None
content = page["content"]
# Truncate to avoid blowing up context, preferring paragraph boundary
if len(content) > self.max_content_chars:
truncated = content[:self.max_content_chars]
last_para = truncated.rfind('\n\n')
if last_para > self.max_content_chars * 0.8:
content = truncated[:last_para]
else:
content = truncated
prompt = EXTRACTOR_PROMPT.format(webpage_content=content, goal=question)
try:
response = await self._llm(
[{"role": "user", "content": prompt}],
temperature=0.2,
max_tokens=2048,
timeout=45,
)
parsed = self._parse_json_object(response)
if parsed:
parsed["url"] = url
parsed["title"] = title or page.get("title", "")
parsed["og_image"] = page.get("og_image", "")
# Skip findings where the LLM says the page is useless
if is_low_quality(parsed.get("summary", "")):
logger.info(f"Skipping low-quality extraction from {url}")
return None
return parsed
# If JSON parsing fails, treat entire response as evidence
return {
"url": url,
"title": title or page.get("title", ""),
"og_image": page.get("og_image", ""),
"rational": "LLM extraction (raw)",
"evidence": response[:3000],
"summary": response[:500],
}
except Exception as e:
logger.warning(f"LLM extraction failed for {url}: {e}")
return None
# ------------------------------------------------------------------
# SYNTHESIZE
# ------------------------------------------------------------------
async def _synthesize(self, question: str, findings: List[Dict],
current_report: str) -> str:
"""LLM synthesizes all findings into an updated report."""
# Format findings for the prompt
window = findings[-self.synthesis_window:]
if len(findings) > self.synthesis_window:
logger.info(f"Synthesis using last {self.synthesis_window} of {len(findings)} findings")
findings_text = self._format_findings(window)
prompt = SYNTHESIZE_PROMPT.format(
question=question,
report=current_report or "(First round — no report yet.)",
new_findings=findings_text,
)
try:
return await self._llm(
[{"role": "user", "content": prompt}],
temperature=0.3,
max_tokens=self.max_report_tokens,
timeout=60,
)
except Exception as e:
logger.error(f"Synthesis failed: {e}")
self._emit(phase="warning", message="Synthesis failed, keeping previous report")
return current_report # keep the old report on failure
# ------------------------------------------------------------------
# DECIDE
# ------------------------------------------------------------------
async def _should_stop(self, question: str, report: str,
round_num: int) -> bool:
"""Let the LLM decide whether the report is comprehensive enough."""
prompt = STOP_PROMPT.format(
question=question,
report=report,
round_num=round_num,
)
try:
response = await self._llm(
[{"role": "user", "content": prompt}],
temperature=0.1,
max_tokens=128,
)
# Reasoning models prepend a <think>...</think> block — strip it
# before checking for YES/NO, otherwise the answer always looks
# like it starts with "<THINK>" and the engine never stops.
clean = strip_thinking(response).strip()
# Tolerate "**YES**", "Yes.", quotes, etc.
answer = re.sub(r'^[\s*_`"\'>#\-]+', '', clean).upper()
should_stop = answer.startswith("YES")
logger.info(f"Stop decision (round {round_num}): {clean[:120]}")
return should_stop
except Exception as e:
logger.warning(f"Stop decision failed: {e}")
return False # continue on error
# ------------------------------------------------------------------
# FINAL REPORT
# ------------------------------------------------------------------
async def _final_report(self, question: str, report: str) -> str:
"""LLM writes a polished final report, retrying if too short."""
prompt = FINAL_REPORT_PROMPT.format(
question=question,
report=report,
)
cat_extra = CATEGORY_PROMPTS.get(self.category or "", "")
if cat_extra:
prompt += "\n\n" + cat_extra
try:
result = await self._llm(
[{"role": "user", "content": prompt}],
temperature=0.3,
max_tokens=self.max_report_tokens,
timeout=180,
)
# If report is too short, ask the LLM to expand it
if len(result.split()) < 400:
logger.info(f"Final report too short ({len(result.split())} words), requesting expansion")
self._emit(phase="writing", message="Expanding report...")
expanded = await self._llm(
[
{"role": "user", "content": prompt},
{"role": "assistant", "content": result},
{"role": "user", "content":
"This report is too brief. Please expand it significantly:\n"
"- Add detailed paragraphs for each section (not just bullet points)\n"
"- Include specific data, numbers, and comparisons from the evidence\n"
"- Explain context and significance — don't just list facts\n"
"- Use ## headings and ### subheadings\n"
"- Target at least 1000 words\n"
"Write the full expanded report now."
},
],
temperature=0.4,
max_tokens=self.max_report_tokens,
timeout=180,
)
if len(expanded.split()) > len(result.split()):
return expanded
return result
except Exception as e:
logger.error(f"Final report generation failed: {e}")
return report # return the evolving report as-is
# ------------------------------------------------------------------
# Helpers
# ------------------------------------------------------------------
def _emit(self, **kwargs):
"""Send a progress event via the callback, if one is registered."""
if self._progress:
try:
self._progress(kwargs)
except Exception:
pass
def _time_exceeded(self) -> bool:
return (time.time() - self._start_time) > self.max_time
# _strip_think_tags removed — use research_utils.strip_thinking()
@staticmethod
def _strip_code_block(text: str) -> str:
"""Strip markdown code-block fences (```json ... ```) if present."""
text = text.strip()
if text.startswith("```"):
text = re.sub(r'^```(?:json)?\s*', '', text)
text = re.sub(r'\s*```$', '', text)
return text.strip()
def _parse_json_array(self, text: str) -> List[str]:
"""Extract a JSON array of strings from LLM output."""
text = self._strip_code_block(text)
try:
parsed = json.loads(text)
if isinstance(parsed, list):
return [str(item) for item in parsed]
except json.JSONDecodeError:
pass
# Greedy match to capture the full outermost array
match = re.search(r'\[[\s\S]*\]', text)
if match:
try:
parsed = json.loads(match.group())
if isinstance(parsed, list):
return [str(item) for item in parsed]
except json.JSONDecodeError:
pass
# Handle truncated arrays — e.g. '["query one", "query two", "query thr'
# Try to find the start of an array and repair it
arr_start = text.find('[')
if arr_start != -1:
fragment = text[arr_start:]
# Find the last complete quoted string
complete_items = re.findall(r'"([^"]*)"', fragment)
if complete_items:
logger.info(f"Repaired truncated JSON array: recovered {len(complete_items)} items")
return complete_items
logger.warning(f"Could not parse JSON array from: {text[:200]}")
return []
def _parse_json_object(self, text: str) -> Optional[Dict]:
"""Extract a JSON object from LLM output."""
text = self._strip_code_block(text)
try:
return json.loads(text)
except json.JSONDecodeError:
pass
# Greedy match to capture the full outermost object
match = re.search(r'\{[\s\S]*\}', text)
if match:
try:
return json.loads(match.group())
except json.JSONDecodeError:
pass
return None
def _format_findings(self, findings: List[Dict]) -> str:
"""Format findings list into readable text for synthesis prompt."""
parts = []
for i, f in enumerate(findings, 1):
url = f.get("url", "unknown")
title = f.get("title", "")
summary = f.get("summary", "")
evidence = f.get("evidence", "")
# Use summary if available, fall back to truncated evidence
content = summary if summary else (evidence[:1000] if evidence else "(no content)")
parts.append(f"**Finding {i}** — [{title}]({url})\n{content}")
return "\n\n".join(parts)
def get_stats(self) -> Dict:
"""Return research statistics."""
elapsed = time.time() - self._start_time if self._start_time else 0
stats = {
"Duration": f"{elapsed:.1f}s",
"Rounds": self.round_count,
"Queries": len(self.queries_used),
"URLs": len(self.urls_fetched),
"Model": self.llm_model,
}
if self.providers_used:
stats["Search"] = ", ".join(self.providers_used)
if self.category:
stats["Category"] = self.category.capitalize()
return stats