v2.8.0 - MCP Server Consolidation

MCP Server Consolidation (13 → 7 tools)

Reduced MCP tool count from 13 to 7 to improve AI tool selection. Fewer, richer tools mean Claude picks the right tool more reliably.

Changes

Merged tools:

• list_conversations merged into search_conversations — call without query to list
• star_conversation, pin_conversation, archive_conversation, set_title merged into update_conversation — set only the fields you want to change
• get_tags merged into get_statistics — now returns tags with usage counts

Removed tools:

• get_network_summary — heavyweight O(n²), still available via ctk net network
• get_clusters — heavyweight, requires NetworkX, still available via ctk net clusters

New tool:

• execute_sql — read-only SQL queries against the CTK database (uses PRAGMA query_only = ON)

Final tool surface

Tool	Purpose
search_conversations	Search or list conversations with filters + pagination
get_conversation	Load full conversation tree by ID
update_conversation	Update star/pin/archive/title
get_statistics	Database overview with tags
find_similar	Find similar conversations (embeddings)
semantic_search	Search by meaning (embeddings)
execute_sql	Read-only SQL queries