v1.4.1 — Umbrella Release: Per-Model MCP Proxy

What's New

Coordinated umbrella release — all three @tscg/* packages at v1.4.1.

@tscg/mcp-proxy — Per-Model Target Resolution

• --target=claude-opus-4-7 auto-enables full compression with operator archetype (hungry/robust/sensitive)
• --target=claude-sonnet-4 for Sonnet-optimized compression
• Backward compatible: createProxy({}) still works (description-only mode)
• 61 tests passing

@tscg/core — Regression Fix

• Fix hasExplicitPrinciples regression when custom principles array is provided
• 47 tests passing

@tscg/tool-optimizer — Version Sync

• Umbrella version sync to 1.4.1, no functional changes

Benchmark Validation

480-Call MCP Proxy Benchmark (n=40 per cell, 2 seeds)

Model	Tools	Baseline	TSCG Proxy	Δ Accuracy	Token Savings
Opus 4.7	16	70.0%	75.0%	+5.0pp	53.1%
Opus 4.7	43	75.0%	75.0%	±0.0pp	55.8%
Opus 4.7	50	77.5%	77.5%	±0.0pp	55.5%
Sonnet 4	16	80.0%	77.5%	-2.5pp	53.1%
Sonnet 4	43	85.0%	82.5%	-2.5pp	55.8%
Sonnet 4	50	77.5%	77.5%	±0.0pp	55.5%

Tool-Optimizer E2E (30 calls, Sonnet 4 @ 16 tools)

• withTSCG(): 86.7% vs baseline 80.0% (+6.7pp), 36.6% character savings

External Validation (4 independent benchmarks)

• BFCL: 108–181% Accuracy Retention Rate across 3 frontier models
• ToolBench: +5.0pp (75.0% → 80.0%)
• Real MCP Server: 100% syntactic validity, 90–97% server acceptance
• TAB → MCP Transfer: 0.1pp prediction accuracy

Install

npm install @tscg/core@1.4.1
npm install @tscg/mcp-proxy@1.4.1
npm install @tscg/tool-optimizer@1.4.1

Full Changelog

v1.4.0...v1.4.1