whetstone_DSL/sprint155_plan.md

Sprint 155 Plan: Multi-Language GA Gate and Tiered Rollout

Context

Sprint 155 defines final release governance for constructive editing with language-tiered readiness (ga, beta, experimental) and controlled rollout.

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Goals

1. Define GA criteria and blocking gates per language tier
2. Add policy controls for staged enablement and rollback by tier
3. Publish release certification packets with determinism/reliability evidence
4. Enable safe rollout where some languages are GA while others are not

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Steps

Step 1789: Multi-language GA criteria schema (10 tests)

Step 1790: Language tier policy model (ga, beta, experimental) (10 tests)

Step 1791: Tiered rollout and rollback control model (10 tests)

Step 1792: Cross-language release evidence aggregator model (10 tests)

Step 1793: whetstone_run_constructive_ga_gate MCP tool (8 tests)

Step 1794: whetstone_get_constructive_rollout_status MCP tool (8 tests)

Step 1795: whetstone_set_language_rollout_tier MCP tool (8 tests)

Step 1796: Constructive release certification packet model (8 tests)

Step 1797: Constructive GA publication bundle (8 tests)

Step 1798: Sprint 155 integration summary + full-program regression (8 tests)

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Architecture Gate

• GA decisions must be evidence-backed, deterministic, and policy-driven
• Tier transitions must be explicit, reversible, and auditable
• Non-GA language tiers must not block GA rollout for ready languages
• Max 600 lines per header