whetstone_DSL/sprint160_plan.md

Sprint 160 Plan: Cross-Language GA Gate Runtime and Tiered Rollout Control

Context

Sprint 160 finalizes runtimeized constructive tooling by implementing evidence- backed GA and rollout policy decisions per representative language.

---

Goals

1. Implement GA gate decisions from real determinism/reliability evidence
2. Add per-language rollout tier updates with policy constraints
3. Expose rollout status across representative languages in one call
4. Publish release certification artifacts from runtime evidence

---

Steps

Step 1839: GA evidence aggregation runtime model (10 tests)

Step 1840: Language tier policy runtime engine (ga, beta, experimental) (10 tests)

Step 1841: Tier transition guardrail and rollback runtime model (10 tests)

Step 1842: Cross-language rollout state snapshot model (10 tests)

Step 1843: whetstone_run_constructive_ga_gate runtime implementation (8 tests)

Step 1844: whetstone_get_constructive_rollout_status runtime implementation (8 tests)

Step 1845: whetstone_set_language_rollout_tier runtime implementation (8 tests)

Step 1846: Runtime-backed constructive release certification packet model (8 tests)

Step 1847: Constructive GA publication bundle artifact (8 tests)

Step 1848: Sprint 160 integration summary + full-program regression (8 tests)

---

Architecture Gate

• GA decisions must be computed from runtime evidence, not static placeholders
• Tier updates must be reversible, auditable, and policy-bound
• Non-GA languages must not block GA-ready language rollout
• Max 600 lines per header