news-mcp/PROJECT.md

Project: news-mcp

Goal

Provide a signal-extraction MCP server that converts RSS into deduplicated, enriched news clusters that are easy for agents to use.

Current architecture (v1)

• FastMCP SSE server mounted at /mcp
• SQLite cache for clusters + Groq summary caches
• RSS fetch (breakingthenews.net)
• v1 dedup via fuzzy title similarity
• optional Ollama embeddings path for clustering (when NEWS_EMBEDDINGS_ENABLED=true)
• configurable embedding similarity threshold (NEWS_EMBEDDING_SIMILARITY_THRESHOLD)
• optional embeddings backfill script for precomputing cluster vectors in SQLite
• optional merge-analysis script for threshold experiments before any DB rewrite
• optional merge pass for destructive consolidation after threshold review
• optional article-dedup cleanup for repeated article variants inside a cluster
• Groq enrichment (topic/entities/sentiment/keywords)
• Tools expose semantic queries over cached clusters

MCP tools (current)

• get_latest_events(topic, limit)
• get_events_for_entity(entity, limit)
• get_event_summary(event_id)
• detect_emerging_topics(limit)
• get_related_entities(subject, timeframe, limit)

Refresh & caching

• Background refresh every NEWS_REFRESH_INTERVAL_SECONDS (default 900s)
• Feed-hash skipping to avoid redundant RSS+Groq work
• Cluster TTL (NEWS_CLUSTERS_TTL_HOURS via CLUSTERS_TTL_HOURS)
• Summary caching for get_event_summary

Definition of “committable”

• Tests pass offline (dedup/storage unit tests)
• Server exposes tool surface with valid schemas
• Caching prevents repeated Groq calls for unchanged clusters
• Embeddings remain optional: Ollama is tried first when enabled, otherwise the heuristic path stays active
• Embeddings backfill script exists for older cluster rows before the server restart
• Merge-analysis script exists to inspect candidate cluster pairs at multiple thresholds
• Merge pass exists for destructive consolidation once thresholds look sane
• Article-dedup cleanup exists for fixing duplicated article records already in SQLite