feat: add ResearchOrchestrator pipeline (src/timmy/research.py)

Implements autonomous research pipeline that chains:
- Check local knowledge (semantic memory cache, confidence > 0.85)
- Generate queries via LLM cascade
- Web search (concurrent, deduplicated)
- Fetch top pages
- Synthesize structured report via LLM
- Crystallize results in semantic memory
- Write artifact (create Gitea issues from action items)

Includes full unit test suite (25 tests) covering all pipeline steps,
cache hits, graceful degradation, and Gitea integration.

Fixes #975

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/timmy/research.py

@@ -0,0 +1,555 @@
+"""ResearchOrchestrator — autonomous research pipeline.
+
+Chains: Check Local → Generate Queries → Search → Fetch → Synthesize →
+Crystallize → Write Artifact into an end-to-end research workflow.
+
+Usage:
+    from timmy.research import ResearchOrchestrator, run_research
+
+    orchestrator = ResearchOrchestrator(cascade=router, memory=memory_fns)
+    result = await orchestrator.run("Bitcoin Lightning Network scaling")
+"""
+
+from __future__ import annotations
+
+import asyncio
+import json
+import logging
+import re
+import time
+from dataclasses import dataclass, field
+from datetime import UTC, datetime
+from typing import Any
+
+from config import settings
+
+logger = logging.getLogger(__name__)
+
+# ── Data structures ──────────────────────────────────────────────────────────
+
+CONFIDENCE_THRESHOLD = 0.85
+DEFAULT_QUERIES_PER_TOPIC = 8
+DEFAULT_RESULTS_PER_QUERY = 5
+DEFAULT_PAGES_TO_FETCH = 10
+DEFAULT_FETCH_TOKEN_LIMIT = 3000
+DEFAULT_SYNTHESIS_MAX_TOKENS = 4000
+
+
+@dataclass
+class ResearchResult:
+    """Output of a completed research pipeline run."""
+
+    topic: str
+    report: str
+    queries_generated: list[str] = field(default_factory=list)
+    sources: list[dict[str, str]] = field(default_factory=list)
+    action_items: list[str] = field(default_factory=list)
+    cache_hit: bool = False
+    duration_ms: float = 0.0
+    metrics: dict[str, Any] = field(default_factory=dict)
+    timestamp: str = field(default_factory=lambda: datetime.now(UTC).isoformat())
+
+
+@dataclass
+class SearchSnippet:
+    """A single search result snippet."""
+
+    title: str
+    url: str
+    snippet: str
+    relevance: float = 0.0
+
+
+@dataclass
+class FetchedPage:
+    """A fetched and truncated web page."""
+
+    url: str
+    title: str
+    content: str
+    token_estimate: int = 0
+
+
+# ── Memory interface ─────────────────────────────────────────────────────────
+
+
+@dataclass
+class MemoryInterface:
+    """Abstraction over the memory system for research.
+
+    Accepts callables so the orchestrator doesn't depend on a specific
+    memory implementation. Defaults wire to timmy.memory_system.
+    """
+
+    search_fn: Any = None  # (query, limit) -> list[MemoryEntry]
+    store_fn: Any = None  # (content, source, context_type, ...) -> MemoryEntry
+
+    def __post_init__(self):
+        if self.search_fn is None or self.store_fn is None:
+            self._load_defaults()
+
+    def _load_defaults(self):
+        try:
+            from timmy.memory_system import search_memories, store_memory
+
+            if self.search_fn is None:
+                self.search_fn = search_memories
+            if self.store_fn is None:
+                self.store_fn = store_memory
+        except ImportError:
+            logger.warning("Memory system not available — research will skip caching")
+            if self.search_fn is None:
+                self.search_fn = lambda query, **kw: []
+            if self.store_fn is None:
+                self.store_fn = lambda content, source, **kw: None
+
+
+# ── Tool interface ───────────────────────────────────────────────────────────
+
+
+@dataclass
+class ResearchTools:
+    """Web search and fetch callables.
+
+    These are async callables:
+      web_search(query: str, limit: int) -> list[dict]
+      web_fetch(url: str, max_tokens: int) -> str
+    """
+
+    web_search: Any = None
+    web_fetch: Any = None
+
+
+# ── Orchestrator ─────────────────────────────────────────────────────────────
+
+
+class ResearchOrchestrator:
+    """Pipeline that chains research steps into an autonomous workflow.
+
+    Steps:
+        0. CHECK LOCAL KNOWLEDGE — search memory, return cached if confident
+        1. GENERATE QUERIES — ask LLM to produce search queries
+        2. SEARCH — execute queries via web_search tool
+        3. FETCH — rank snippets, fetch top pages
+        4. SYNTHESIZE — produce structured report via LLM
+        5. CRYSTALLIZE — store result in semantic memory
+        6. WRITE ARTIFACT — create Gitea issues from action items
+    """
+
+    def __init__(
+        self,
+        cascade: Any,
+        memory: MemoryInterface | None = None,
+        tools: ResearchTools | None = None,
+    ) -> None:
+        self.cascade = cascade
+        self.memory = memory or MemoryInterface()
+        self.tools = tools or ResearchTools()
+        self._metrics: dict[str, int] = {
+            "research_cache_hit": 0,
+            "research_api_call": 0,
+        }
+
+    async def run(
+        self,
+        topic: str,
+        template: str | None = None,
+        context: dict[str, Any] | None = None,
+    ) -> ResearchResult:
+        """Execute the full research pipeline.
+
+        Args:
+            topic: The research topic or question.
+            template: Optional prompt template for synthesis.
+            context: Additional context dict (cascade_tier hint, etc.).
+
+        Returns:
+            ResearchResult with report, sources, and action items.
+        """
+        start = time.monotonic()
+        context = context or {}
+        cascade_tier = context.get("cascade_tier")
+
+        # Step 0: Check local knowledge
+        cached = await self._check_local_knowledge(topic)
+        if cached is not None:
+            self._metrics["research_cache_hit"] += 1
+            cached.duration_ms = (time.monotonic() - start) * 1000
+            return cached
+
+        self._metrics["research_api_call"] += 1
+
+        # Step 1: Generate queries
+        queries = await self._generate_queries(topic, template, cascade_tier)
+
+        # Step 2: Search
+        snippets = await self._search(queries)
+
+        # Step 3: Fetch top pages
+        pages = await self._fetch(snippets)
+
+        # Step 4: Synthesize
+        report = await self._synthesize(topic, template, pages, cascade_tier)
+
+        # Step 5: Extract action items
+        action_items = _extract_action_items(report)
+
+        # Build result
+        sources = [{"url": p.url, "title": p.title} for p in pages]
+        result = ResearchResult(
+            topic=topic,
+            report=report,
+            queries_generated=queries,
+            sources=sources,
+            action_items=action_items,
+            cache_hit=False,
+            duration_ms=(time.monotonic() - start) * 1000,
+            metrics=dict(self._metrics),
+        )
+
+        # Step 6: Crystallize — store in memory
+        await self._crystallize(topic, result)
+
+        # Step 7: Write artifact — create Gitea issues
+        await self._write_artifact(result)
+
+        return result
+
+    # ── Pipeline steps ───────────────────────────────────────────────────
+
+    async def _check_local_knowledge(self, topic: str) -> ResearchResult | None:
+        """Search semantic memory for existing research on this topic."""
+        try:
+            results = self.memory.search_fn(
+                query=topic, limit=10, context_type="research"
+            )
+            if not results:
+                return None
+
+            # Check if top result has high confidence
+            top = results[0]
+            score = getattr(top, "relevance_score", 0.0) or 0.0
+            if score >= CONFIDENCE_THRESHOLD:
+                content = getattr(top, "content", str(top))
+                logger.info(
+                    "Research cache hit for '%s' (score=%.2f)", topic, score
+                )
+                return ResearchResult(
+                    topic=topic,
+                    report=content,
+                    cache_hit=True,
+                    metrics={"research_cache_hit": 1},
+                )
+        except Exception as exc:
+            logger.warning("Local knowledge check failed: %s", exc)
+
+        return None
+
+    async def _generate_queries(
+        self,
+        topic: str,
+        template: str | None,
+        cascade_tier: str | None,
+    ) -> list[str]:
+        """Ask the LLM to generate search queries for the topic."""
+        prompt = (
+            f"Generate {DEFAULT_QUERIES_PER_TOPIC} diverse web search queries "
+            f"to thoroughly research the following topic. Return ONLY the "
+            f"queries, one per line, no numbering or bullets.\n\n"
+            f"Topic: {topic}"
+        )
+        if template:
+            prompt += f"\n\nResearch template context:\n{template}"
+
+        messages = [
+            {"role": "system", "content": "You are a research query generator."},
+            {"role": "user", "content": prompt},
+        ]
+
+        kwargs: dict[str, Any] = {"messages": messages, "temperature": 0.7}
+        if cascade_tier:
+            kwargs["model"] = cascade_tier
+
+        try:
+            response = await self.cascade.complete(**kwargs)
+            raw = response.get("content", "")
+            queries = [
+                line.strip()
+                for line in raw.strip().splitlines()
+                if line.strip() and not line.strip().startswith("#")
+            ]
+            # Clean numbering prefixes
+            cleaned = []
+            for q in queries:
+                q = re.sub(r"^\d+[\.\)]\s*", "", q)
+                q = re.sub(r"^[-*]\s*", "", q)
+                if q:
+                    cleaned.append(q)
+            return cleaned[:DEFAULT_QUERIES_PER_TOPIC + 4]  # slight over-generate
+        except Exception as exc:
+            logger.warning("Query generation failed: %s", exc)
+            # Fallback: use topic itself as a single query
+            return [topic]
+
+    async def _search(self, queries: list[str]) -> list[SearchSnippet]:
+        """Execute search queries and collect snippets."""
+        if not self.tools.web_search:
+            logger.warning("No web_search tool configured — skipping search step")
+            return []
+
+        all_snippets: list[SearchSnippet] = []
+
+        async def _run_query(query: str) -> list[SearchSnippet]:
+            try:
+                results = await asyncio.to_thread(
+                    self.tools.web_search, query, DEFAULT_RESULTS_PER_QUERY
+                )
+                snippets = []
+                for r in (results or []):
+                    snippets.append(
+                        SearchSnippet(
+                            title=r.get("title", ""),
+                            url=r.get("url", ""),
+                            snippet=r.get("snippet", ""),
+                        )
+                    )
+                return snippets
+            except Exception as exc:
+                logger.warning("Search failed for query '%s': %s", query, exc)
+                return []
+
+        # Run searches concurrently
+        tasks = [_run_query(q) for q in queries]
+        results = await asyncio.gather(*tasks)
+        for snippets in results:
+            all_snippets.extend(snippets)
+
+        # Deduplicate by URL
+        seen_urls: set[str] = set()
+        unique: list[SearchSnippet] = []
+        for s in all_snippets:
+            if s.url and s.url not in seen_urls:
+                seen_urls.add(s.url)
+                unique.append(s)
+
+        return unique
+
+    async def _fetch(self, snippets: list[SearchSnippet]) -> list[FetchedPage]:
+        """Fetch top pages from search snippets."""
+        if not self.tools.web_fetch:
+            logger.warning("No web_fetch tool configured — skipping fetch step")
+            return []
+
+        # Take top N snippets
+        to_fetch = snippets[:DEFAULT_PAGES_TO_FETCH]
+        pages: list[FetchedPage] = []
+
+        async def _fetch_one(snippet: SearchSnippet) -> FetchedPage | None:
+            try:
+                content = await asyncio.to_thread(
+                    self.tools.web_fetch, snippet.url, DEFAULT_FETCH_TOKEN_LIMIT
+                )
+                if content:
+                    return FetchedPage(
+                        url=snippet.url,
+                        title=snippet.title,
+                        content=content[:DEFAULT_FETCH_TOKEN_LIMIT * 4],
+                        token_estimate=len(content.split()),
+                    )
+            except Exception as exc:
+                logger.warning("Fetch failed for %s: %s", snippet.url, exc)
+            return None
+
+        tasks = [_fetch_one(s) for s in to_fetch]
+        results = await asyncio.gather(*tasks)
+        for page in results:
+            if page is not None:
+                pages.append(page)
+
+        return pages
+
+    async def _synthesize(
+        self,
+        topic: str,
+        template: str | None,
+        pages: list[FetchedPage],
+        cascade_tier: str | None,
+    ) -> str:
+        """Synthesize fetched pages into a structured research report."""
+        # Build context from fetched pages
+        context_parts = []
+        for i, page in enumerate(pages, 1):
+            context_parts.append(
+                f"--- Source {i}: {page.title} ({page.url}) ---\n"
+                f"{page.content[:DEFAULT_FETCH_TOKEN_LIMIT * 4]}\n"
+            )
+
+        sources_text = "\n".join(context_parts) if context_parts else "(no sources fetched)"
+
+        if template:
+            prompt = (
+                f"{template}\n\n"
+                f"Topic: {topic}\n\n"
+                f"Research sources:\n{sources_text}\n\n"
+                f"Synthesize a comprehensive report based on the sources above."
+            )
+        else:
+            prompt = (
+                f"Write a comprehensive research report on: {topic}\n\n"
+                f"Research sources:\n{sources_text}\n\n"
+                f"Structure your report with:\n"
+                f"- Executive summary\n"
+                f"- Key findings\n"
+                f"- Analysis\n"
+                f"- Action items (prefix each with 'ACTION:')\n"
+                f"- Sources cited"
+            )
+
+        messages = [
+            {"role": "system", "content": "You are a research analyst producing structured reports."},
+            {"role": "user", "content": prompt},
+        ]
+
+        kwargs: dict[str, Any] = {
+            "messages": messages,
+            "temperature": 0.3,
+            "max_tokens": DEFAULT_SYNTHESIS_MAX_TOKENS,
+        }
+        if cascade_tier:
+            kwargs["model"] = cascade_tier
+
+        try:
+            response = await self.cascade.complete(**kwargs)
+            return response.get("content", "")
+        except Exception as exc:
+            logger.error("Synthesis failed: %s", exc)
+            # Fallback: return raw source summaries
+            return (
+                f"# Research: {topic}\n\n"
+                f"Synthesis failed ({exc}). Raw sources:\n\n{sources_text}"
+            )
+
+    async def _crystallize(self, topic: str, result: ResearchResult) -> None:
+        """Store the research result in semantic memory."""
+        try:
+            self.memory.store_fn(
+                content=result.report,
+                source="research_orchestrator",
+                context_type="research",
+                metadata={
+                    "topic": topic,
+                    "sources": result.sources,
+                    "action_items": result.action_items,
+                    "cache_hit": result.cache_hit,
+                    "duration_ms": result.duration_ms,
+                },
+            )
+            logger.info("Crystallized research on '%s' into memory", topic)
+        except Exception as exc:
+            logger.warning("Failed to crystallize research: %s", exc)
+
+    async def _write_artifact(self, result: ResearchResult) -> None:
+        """Create Gitea issues from action items."""
+        if not result.action_items:
+            return
+
+        try:
+            await asyncio.to_thread(_create_gitea_issues, result)
+        except Exception as exc:
+            logger.warning("Failed to create Gitea issues: %s", exc)
+
+    def get_metrics(self) -> dict[str, int]:
+        """Return current research pipeline metrics."""
+        return dict(self._metrics)
+
+
+# ── Helpers ──────────────────────────────────────────────────────────────────
+
+
+def _extract_action_items(report: str) -> list[str]:
+    """Extract action items from a research report.
+
+    Looks for lines prefixed with ACTION:, TODO:, or - [ ].
+    """
+    items: list[str] = []
+    for line in report.splitlines():
+        stripped = line.strip()
+        # ACTION: prefix
+        match = re.match(r"^(?:ACTION|TODO)\s*:\s*(.+)", stripped, re.IGNORECASE)
+        if match:
+            items.append(match.group(1).strip())
+            continue
+        # Markdown checkbox
+        match = re.match(r"^-\s*\[\s*\]\s*(.+)", stripped)
+        if match:
+            items.append(match.group(1).strip())
+
+    return items
+
+
+def _create_gitea_issues(result: ResearchResult) -> None:
+    """Create Gitea issues for action items (runs in thread)."""
+    if not settings.gitea_token or not settings.gitea_url:
+        logger.debug("Gitea not configured — skipping issue creation")
+        return
+
+    try:
+        import requests
+    except ImportError:
+        logger.debug("requests not available — skipping Gitea issue creation")
+        return
+
+    base_url = settings.gitea_url.rstrip("/")
+    repo = settings.gitea_repo
+    headers = {
+        "Authorization": f"token {settings.gitea_token}",
+        "Content-Type": "application/json",
+    }
+
+    for item in result.action_items:
+        try:
+            payload = {
+                "title": f"[research] {item[:100]}",
+                "body": (
+                    f"Auto-generated from research on: **{result.topic}**\n\n"
+                    f"Action item: {item}\n\n"
+                    f"---\n"
+                    f"_Created by ResearchOrchestrator_"
+                ),
+            }
+            resp = requests.post(
+                f"{base_url}/api/v1/repos/{repo}/issues",
+                headers=headers,
+                json=payload,
+                timeout=10,
+            )
+            if resp.status_code in (200, 201):
+                logger.info("Created Gitea issue: %s", item[:60])
+            else:
+                logger.warning(
+                    "Gitea issue creation failed (%d): %s",
+                    resp.status_code,
+                    resp.text[:200],
+                )
+        except Exception as exc:
+            logger.warning("Failed to create issue '%s': %s", item[:60], exc)
+
+
+# ── Convenience function ─────────────────────────────────────────────────────
+
+
+async def run_research(
+    topic: str,
+    template: str | None = None,
+    context: dict[str, Any] | None = None,
+) -> ResearchResult:
+    """Convenience function to run research with default dependencies.
+
+    Creates a ResearchOrchestrator with the cascade router singleton
+    and default memory, then executes the pipeline.
+    """
+    from infrastructure.router.cascade import get_router
+
+    cascade = get_router()
+    orchestrator = ResearchOrchestrator(cascade=cascade)
+    return await orchestrator.run(topic, template=template, context=context)

tests/unit/test_research.py

@@ -0,0 +1,497 @@
+"""Unit tests for timmy.research — ResearchOrchestrator pipeline."""
+
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from timmy.research import (
+    DEFAULT_QUERIES_PER_TOPIC,
+    MemoryInterface,
+    ResearchOrchestrator,
+    ResearchResult,
+    ResearchTools,
+    SearchSnippet,
+    _extract_action_items,
+)
+
+# ── Data structures ──────────────────────────────────────────────────────────
+
+
+class TestResearchResult:
+    def test_defaults(self):
+        r = ResearchResult(topic="test", report="content")
+        assert r.topic == "test"
+        assert r.report == "content"
+        assert r.cache_hit is False
+        assert r.queries_generated == []
+        assert r.sources == []
+        assert r.action_items == []
+        assert r.duration_ms == 0.0
+        assert r.timestamp  # non-empty
+
+    def test_with_data(self):
+        r = ResearchResult(
+            topic="AI",
+            report="report text",
+            queries_generated=["q1", "q2"],
+            sources=[{"url": "http://example.com", "title": "Test"}],
+            action_items=["Do X"],
+            cache_hit=True,
+            duration_ms=42.5,
+        )
+        assert r.cache_hit is True
+        assert len(r.sources) == 1
+        assert r.duration_ms == 42.5
+
+
+class TestSearchSnippet:
+    def test_fields(self):
+        s = SearchSnippet(title="T", url="http://x.com", snippet="text")
+        assert s.relevance == 0.0
+
+
+# ── _extract_action_items ────────────────────────────────────────────────────
+
+
+class TestExtractActionItems:
+    def test_action_prefix(self):
+        report = "Some text\nACTION: Do the thing\nMore text"
+        items = _extract_action_items(report)
+        assert items == ["Do the thing"]
+
+    def test_todo_prefix(self):
+        report = "TODO: Fix the bug\nTodo: Also this"
+        items = _extract_action_items(report)
+        assert items == ["Fix the bug", "Also this"]
+
+    def test_checkbox(self):
+        report = "- [ ] Implement feature\n- [x] Already done"
+        items = _extract_action_items(report)
+        assert items == ["Implement feature"]
+
+    def test_mixed(self):
+        report = "ACTION: First\n- [ ] Second\nTODO: Third"
+        items = _extract_action_items(report)
+        assert items == ["First", "Second", "Third"]
+
+    def test_empty(self):
+        assert _extract_action_items("No actions here") == []
+        assert _extract_action_items("") == []
+
+
+# ── MemoryInterface ──────────────────────────────────────────────────────────
+
+
+class TestMemoryInterface:
+    def test_custom_fns(self):
+        search = MagicMock(return_value=[])
+        store = MagicMock()
+        mi = MemoryInterface(search_fn=search, store_fn=store)
+        assert mi.search_fn is search
+        assert mi.store_fn is store
+
+    def test_defaults_when_import_fails(self):
+        with patch.dict("sys.modules", {"timmy.memory_system": None}):
+            mi = MemoryInterface()
+            # Should have fallback callables
+            assert callable(mi.search_fn)
+            assert callable(mi.store_fn)
+            # Fallback search returns empty
+            assert mi.search_fn("test") == []
+
+
+# ── ResearchOrchestrator ─────────────────────────────────────────────────────
+
+
+def _make_cascade(**overrides):
+    """Create a mock cascade router."""
+    cascade = AsyncMock()
+    cascade.complete = AsyncMock(
+        return_value={"content": overrides.get("content", "query1\nquery2\nquery3")}
+    )
+    return cascade
+
+
+def _make_memory(search_results=None, score=0.0):
+    """Create a mock memory interface."""
+    if search_results is None:
+        search_results = []
+    search_fn = MagicMock(return_value=search_results)
+    store_fn = MagicMock()
+    return MemoryInterface(search_fn=search_fn, store_fn=store_fn)
+
+
+def _make_tools(search_results=None, fetch_content="Page content"):
+    """Create mock research tools."""
+    web_search = MagicMock(
+        return_value=search_results
+        or [
+            {"title": "Result 1", "url": "http://a.com", "snippet": "Snippet 1"},
+            {"title": "Result 2", "url": "http://b.com", "snippet": "Snippet 2"},
+        ]
+    )
+    web_fetch = MagicMock(return_value=fetch_content)
+    return ResearchTools(web_search=web_search, web_fetch=web_fetch)
+
+
+class TestResearchOrchestratorInit:
+    def test_basic_init(self):
+        cascade = _make_cascade()
+        memory = _make_memory()
+        tools = _make_tools()
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory, tools=tools)
+        assert orch.cascade is cascade
+        assert orch.memory is memory
+        assert orch.tools is tools
+        assert orch._metrics["research_cache_hit"] == 0
+        assert orch._metrics["research_api_call"] == 0
+
+
+class TestCheckLocalKnowledge:
+    @pytest.mark.asyncio
+    async def test_cache_hit(self):
+        """High-confidence memory result returns cached ResearchResult."""
+        entry = MagicMock()
+        entry.relevance_score = 0.90
+        entry.content = "Cached report"
+
+        memory = _make_memory(search_results=[entry])
+        cascade = _make_cascade()
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory)
+
+        result = await orch._check_local_knowledge("test topic")
+        assert result is not None
+        assert result.cache_hit is True
+        assert result.report == "Cached report"
+
+    @pytest.mark.asyncio
+    async def test_cache_miss_low_score(self):
+        """Low-confidence result returns None."""
+        entry = MagicMock()
+        entry.relevance_score = 0.5
+        entry.content = "Weak match"
+
+        memory = _make_memory(search_results=[entry])
+        cascade = _make_cascade()
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory)
+
+        result = await orch._check_local_knowledge("test topic")
+        assert result is None
+
+    @pytest.mark.asyncio
+    async def test_cache_miss_empty(self):
+        """No memory results returns None."""
+        memory = _make_memory(search_results=[])
+        cascade = _make_cascade()
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory)
+
+        result = await orch._check_local_knowledge("test topic")
+        assert result is None
+
+    @pytest.mark.asyncio
+    async def test_exception_returns_none(self):
+        """Memory search exception returns None gracefully."""
+        memory = MemoryInterface(
+            search_fn=MagicMock(side_effect=RuntimeError("db error")),
+            store_fn=MagicMock(),
+        )
+        cascade = _make_cascade()
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory)
+
+        result = await orch._check_local_knowledge("test topic")
+        assert result is None
+
+
+class TestGenerateQueries:
+    @pytest.mark.asyncio
+    async def test_parses_queries(self):
+        cascade = _make_cascade(content="query one\nquery two\nquery three")
+        orch = ResearchOrchestrator(cascade=cascade, memory=_make_memory())
+
+        queries = await orch._generate_queries("AI safety", None, None)
+        assert queries == ["query one", "query two", "query three"]
+
+    @pytest.mark.asyncio
+    async def test_strips_numbering(self):
+        cascade = _make_cascade(content="1. First query\n2. Second query\n3) Third")
+        orch = ResearchOrchestrator(cascade=cascade, memory=_make_memory())
+
+        queries = await orch._generate_queries("topic", None, None)
+        assert "First query" in queries
+        assert "Second query" in queries
+        assert "Third" in queries
+
+    @pytest.mark.asyncio
+    async def test_fallback_on_error(self):
+        cascade = AsyncMock()
+        cascade.complete = AsyncMock(side_effect=RuntimeError("LLM down"))
+        orch = ResearchOrchestrator(cascade=cascade, memory=_make_memory())
+
+        queries = await orch._generate_queries("fallback topic", None, None)
+        assert queries == ["fallback topic"]
+
+    @pytest.mark.asyncio
+    async def test_passes_cascade_tier(self):
+        cascade = _make_cascade(content="q1\nq2")
+        orch = ResearchOrchestrator(cascade=cascade, memory=_make_memory())
+
+        await orch._generate_queries("topic", None, "gpt-4")
+        call_kwargs = cascade.complete.call_args.kwargs
+        assert call_kwargs.get("model") == "gpt-4"
+
+
+class TestSearch:
+    @pytest.mark.asyncio
+    async def test_collects_snippets(self):
+        tools = _make_tools()
+        orch = ResearchOrchestrator(
+            cascade=_make_cascade(), memory=_make_memory(), tools=tools
+        )
+
+        snippets = await orch._search(["q1", "q2"])
+        # 2 results per query, 2 queries, but deduplicated by URL
+        assert len(snippets) == 2  # same URLs returned for both queries
+
+    @pytest.mark.asyncio
+    async def test_no_search_tool(self):
+        tools = ResearchTools(web_search=None)
+        orch = ResearchOrchestrator(
+            cascade=_make_cascade(), memory=_make_memory(), tools=tools
+        )
+
+        snippets = await orch._search(["q1"])
+        assert snippets == []
+
+    @pytest.mark.asyncio
+    async def test_search_error_handled(self):
+        tools = ResearchTools(
+            web_search=MagicMock(side_effect=RuntimeError("network error"))
+        )
+        orch = ResearchOrchestrator(
+            cascade=_make_cascade(), memory=_make_memory(), tools=tools
+        )
+
+        snippets = await orch._search(["q1"])
+        assert snippets == []
+
+
+class TestFetch:
+    @pytest.mark.asyncio
+    async def test_fetches_pages(self):
+        tools = _make_tools(fetch_content="Page body here")
+        orch = ResearchOrchestrator(
+            cascade=_make_cascade(), memory=_make_memory(), tools=tools
+        )
+
+        snippets = [
+            SearchSnippet(title="P1", url="http://a.com", snippet="s1"),
+            SearchSnippet(title="P2", url="http://b.com", snippet="s2"),
+        ]
+        pages = await orch._fetch(snippets)
+        assert len(pages) == 2
+        assert pages[0].content == "Page body here"
+
+    @pytest.mark.asyncio
+    async def test_no_fetch_tool(self):
+        tools = ResearchTools(web_fetch=None)
+        orch = ResearchOrchestrator(
+            cascade=_make_cascade(), memory=_make_memory(), tools=tools
+        )
+
+        pages = await orch._fetch([SearchSnippet("T", "http://x.com", "s")])
+        assert pages == []
+
+
+class TestSynthesize:
+    @pytest.mark.asyncio
+    async def test_produces_report(self):
+        cascade = _make_cascade(content="# Report\nKey findings here")
+        orch = ResearchOrchestrator(cascade=cascade, memory=_make_memory())
+
+        from timmy.research import FetchedPage
+
+        pages = [FetchedPage(url="http://x.com", title="X", content="content")]
+        report = await orch._synthesize("topic", None, pages, None)
+        assert "Report" in report
+
+    @pytest.mark.asyncio
+    async def test_fallback_on_error(self):
+        cascade = AsyncMock()
+        cascade.complete = AsyncMock(side_effect=RuntimeError("LLM error"))
+        orch = ResearchOrchestrator(cascade=cascade, memory=_make_memory())
+
+        from timmy.research import FetchedPage
+
+        pages = [FetchedPage(url="http://x.com", title="X", content="content")]
+        report = await orch._synthesize("topic", None, pages, None)
+        assert "Synthesis failed" in report
+        assert "topic" in report
+
+
+class TestCrystallize:
+    @pytest.mark.asyncio
+    async def test_stores_in_memory(self):
+        memory = _make_memory()
+        orch = ResearchOrchestrator(cascade=_make_cascade(), memory=memory)
+
+        result = ResearchResult(topic="test", report="report text")
+        await orch._crystallize("test", result)
+
+        memory.store_fn.assert_called_once()
+        call_kwargs = memory.store_fn.call_args
+        assert call_kwargs.kwargs.get("context_type") == "research"
+        assert call_kwargs.kwargs.get("source") == "research_orchestrator"
+
+    @pytest.mark.asyncio
+    async def test_store_error_handled(self):
+        memory = MemoryInterface(
+            search_fn=MagicMock(return_value=[]),
+            store_fn=MagicMock(side_effect=RuntimeError("db error")),
+        )
+        orch = ResearchOrchestrator(cascade=_make_cascade(), memory=memory)
+
+        result = ResearchResult(topic="test", report="report")
+        # Should not raise
+        await orch._crystallize("test", result)
+
+
+class TestWriteArtifact:
+    @pytest.mark.asyncio
+    async def test_no_action_items_skips(self):
+        orch = ResearchOrchestrator(cascade=_make_cascade(), memory=_make_memory())
+
+        result = ResearchResult(topic="test", report="r", action_items=[])
+        # Should complete without any calls
+        await orch._write_artifact(result)
+
+    @pytest.mark.asyncio
+    async def test_creates_issues(self):
+        orch = ResearchOrchestrator(cascade=_make_cascade(), memory=_make_memory())
+
+        result = ResearchResult(
+            topic="test", report="r", action_items=["Fix the thing"]
+        )
+        with patch("timmy.research._create_gitea_issues") as mock_create:
+            await orch._write_artifact(result)
+            mock_create.assert_called_once_with(result)
+
+
+class TestFullPipeline:
+    @pytest.mark.asyncio
+    async def test_cache_hit_short_circuits(self):
+        """When memory has a high-confidence match, skip web search."""
+        entry = MagicMock()
+        entry.relevance_score = 0.95
+        entry.content = "Previously researched content"
+
+        memory = _make_memory(search_results=[entry])
+        cascade = _make_cascade()
+        tools = _make_tools()
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory, tools=tools)
+
+        result = await orch.run("cached topic")
+        assert result.cache_hit is True
+        assert result.report == "Previously researched content"
+        # Cascade should NOT have been called (no query generation or synthesis)
+        cascade.complete.assert_not_called()
+        assert orch._metrics["research_cache_hit"] == 1
+
+    @pytest.mark.asyncio
+    async def test_full_pipeline_no_tools(self):
+        """Pipeline completes even without web tools (graceful degradation)."""
+        memory = _make_memory()
+        cascade = AsyncMock()
+        # First call: generate queries, second: synthesize
+        cascade.complete = AsyncMock(
+            side_effect=[
+                {"content": "query 1\nquery 2"},
+                {"content": "# Report\nACTION: Do something"},
+            ]
+        )
+        tools = ResearchTools()  # No web tools
+
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory, tools=tools)
+
+        with patch("timmy.research._create_gitea_issues"):
+            result = await orch.run("test topic")
+
+        assert result.topic == "test topic"
+        assert result.cache_hit is False
+        assert "Report" in result.report
+        assert result.action_items == ["Do something"]
+        assert result.duration_ms > 0
+        assert orch._metrics["research_api_call"] == 1
+        memory.store_fn.assert_called_once()
+
+    @pytest.mark.asyncio
+    async def test_full_pipeline_with_tools(self):
+        """Full pipeline with search and fetch tools."""
+        memory = _make_memory()
+        cascade = AsyncMock()
+        cascade.complete = AsyncMock(
+            side_effect=[
+                {"content": "search query 1\nsearch query 2"},
+                {"content": "# Full Report\nTODO: Review findings"},
+            ]
+        )
+        tools = _make_tools()
+
+        orch = ResearchOrchestrator(cascade=cascade, memory=memory, tools=tools)
+
+        with patch("timmy.research._create_gitea_issues"):
+            result = await orch.run("test topic")
+
+        assert result.topic == "test topic"
+        assert result.cache_hit is False
+        assert len(result.queries_generated) == 2
+        assert len(result.sources) > 0
+        assert result.action_items == ["Review findings"]
+
+    @pytest.mark.asyncio
+    async def test_get_metrics(self):
+        orch = ResearchOrchestrator(cascade=_make_cascade(), memory=_make_memory())
+        metrics = orch.get_metrics()
+        assert "research_cache_hit" in metrics
+        assert "research_api_call" in metrics
+
+
+class TestCreateGiteaIssues:
+    def test_no_token_skips(self):
+        """No Gitea token configured — silently skips."""
+        from timmy.research import _create_gitea_issues
+
+        result = ResearchResult(
+            topic="t", report="r", action_items=["item"]
+        )
+        mock_settings = MagicMock()
+        mock_settings.gitea_token = ""
+        mock_settings.gitea_url = ""
+        with patch("timmy.research.settings", mock_settings):
+            # Should not raise
+            _create_gitea_issues(result)
+
+    def test_creates_issue_on_success(self):
+        from timmy.research import _create_gitea_issues
+
+        result = ResearchResult(
+            topic="AI", report="r", action_items=["Deploy model"]
+        )
+        mock_settings = MagicMock()
+        mock_settings.gitea_token = "tok"
+        mock_settings.gitea_url = "http://localhost:3000"
+        mock_settings.gitea_repo = "owner/repo"
+
+        mock_resp = MagicMock()
+        mock_resp.status_code = 201
+
+        mock_requests_mod = MagicMock()
+        mock_requests_mod.post.return_value = mock_resp
+
+        with (
+            patch("timmy.research.settings", mock_settings),
+            patch.dict("sys.modules", {"requests": mock_requests_mod}),
+        ):
+            _create_gitea_issues(result)
+            mock_requests_mod.post.assert_called_once()
+            call_kwargs = mock_requests_mod.post.call_args
+            assert "[research]" in call_kwargs.kwargs["json"]["title"]