whetstone_DSL/sprint210_plan.md

Sprint 210 Plan: Language-First Efficiency and Reliability Gate

Context

Language-first path shows high token cost with low hard-spec readiness.

Goals

1. Add language-first efficiency scoring (tokens vs readiness)
2. Introduce fail-fast guardrails for low-yield runs
3. Route expensive low-yield workloads to deterministic alternatives

Steps

Step 2089: Efficiency metric model (10 tests)

Compute token-efficiency score and readiness-adjusted utility.

Step 2090: Low-yield fail-fast policy (10 tests)

Early-stop language-first runs that exceed token budget with low confidence.

Step 2091: Route-to-deterministic policy hook (8 tests)

Route to AST-first/deterministic path when efficiency policy fails.

Step 2092: Efficiency diagnostics and trend report (8 tests)

Emit token-usage trend and low-yield run report artifacts.

Step 2093: Sprint 210 Integration Summary (8 tests)

Add editor/src/Sprint210IntegrationSummary.h.

Architecture Gate

• Language-first path must satisfy minimum readiness-adjusted efficiency thresholds.