CKB v7.4.0

See CHANGELOG.md for full release notes.

Key Features in v7.4.0

Tool Presets & Pagination

Token-optimized tool discovery reducing context overhead by up to 83%:

Preset	Tools	Tokens	Use Case
core (default)	14	~1,531	Essential navigation and analysis
review	19	~2,294	Code review: PR summary, ownership
refactor	19	~2,216	Refactoring: coupling, dead code
docs	20	~2,093	Documentation: coverage, staleness
ops	25	~2,366	Operations: jobs, webhooks, metrics
federation	28	~3,122	Multi-repo: cross-repo search
full	76	~9,043	All tools (legacy behavior)

Features:

• MCP-compliant cursor-based pagination
• Core-first ordering for non-paginating clients
• expandToolset meta-tool for dynamic preset expansion
• tools.listChanged capability for dynamic updates

Wide-Result Metrics Tracking

Infrastructure for monitoring tool output sizes:

• getWideResultMetrics tool for statistics
• SQLite persistence for historical tracking
• ckb metrics CLI with export support

SCIP Backend Optimizations

Major performance improvements:

Operation	Before	After	Improvement
FindReferences	340μs	2.5μs	136x faster
SearchSymbols	930μs	136μs	7x faster
FindSymbolLocation	70μs	28ns	2,500x faster

Git Backend Optimizations

getHotspots improved from 26.7s to 498ms (53x faster).

Standardized Response Envelope

All 76 MCP tools now include structured metadata:

• Confidence tiers (high/medium/low/speculative)
• Provenance tracking (which backends contributed)
• Truncation metadata with drilldown suggestions

Update Notifications

Automatic update checking for all installation methods:

• Deferred notification at command start
• 24-hour cache with background refresh
• Smart upgrade message (npm vs GitHub releases)

Hybrid Retrieval with PPR

Graph-based retrieval using Personalized PageRank:

• Recall@10: 62.1% → 100% (+61%)
• MRR: 0.546 → 0.914 (+67%)

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