whetstone_DSL/sprint141_plan.md

Sprint 141 Plan: Hybrid Authoring Foundations (Text-First + AST-First)

Context

AST-first remains deterministic, but many users need immediate productivity in classical languages (especially C++). Sprint 141 introduces explicit hybrid authoring modes so teams can ship today while preserving AST-backed guarantees.

---

Goals

1. Add explicit authoring modes (text_first, ast_first, hybrid)
2. Make C++ text-first the production-ready default option
3. Persist mode/state in workspace/session config
4. Keep deterministic AST projection available in all modes

---

Steps

Step 1649: Authoring mode schema and state model (10 tests)

Step 1650: Workspace mode policy bindings (10 tests)

Step 1651: Session-level mode override model (10 tests)

Step 1652: C++ text-first default profile model (10 tests)

Step 1653: whetstone_get_authoring_mode MCP tool (8 tests)

Step 1654: whetstone_set_authoring_mode MCP tool (8 tests)

Step 1655: whetstone_get_mode_capabilities MCP tool (8 tests)

Step 1656: Mode transition event packet model (8 tests)

Step 1657: Hybrid mode readiness report artifact (8 tests)

Step 1658: Sprint 141 integration summary + regression (8 tests)

---

Architecture Gate

• Mode changes must be deterministic and auditable
• C++ text-first profile must be stable and defaultable per workspace
• Capability reports must be machine-readable
• Max 600 lines per header