whetstone_DSL/CLAUDE.md

Whetstone DSL — Claude Code Session Guide

Read this before starting any work on the Whetstone editor. This project is independent of HiveMind. Do not conflate them.

---

What Whetstone Is

Whetstone is a general-purpose constructive editor and MCP server for cross-language code generation. It is NOT a HiveMind-specific tool — HiveMind is one of many projects that consumes it. Whetstone's core capabilities:

• Semantic annotation DSL (SemAnno): annotate code with memory/ownership intent
• 19+ language parsers and generators (Python, C++, Rust, Go, JS/TS, Java, and more)
• Cross-language transpilation (AST-level, annotation-guided)
• 90 MCP tools callable by any MCP client over stdio
• Headless whetstone_mcp binary + full ImGui GUI editor (whetstone_editor)

Stack: C++20, Dear ImGui + SDL2 + OpenGL3, nlohmann-json, tree-sitter, vcpkg, CMake

---

Current State

Item	Value
Last step	Step 688
Last sprint	Sprint 45 — COMPLETE
MCP tool count	90 tools
Test matrix	52/52 passing (Sprint 45 matrix)
Architecture gate	All headers ≤ 600 lines
whetstone_mcp binary	editor/build-native/whetstone_mcp (built 2026-02-19)

Sprint history: see PROGRESS.md for sprint-level summary, progress.md (lowercase, 14k+ lines) for step-by-step detail.

---

Sprint Workflow (TDD Pattern)

Every sprint follows this exact pattern:

1. Write a sprintN_plan.md with 5 steps
2. Each step: implement → test → verify → log to progress.md
3. Step naming: stepNNN_test.cpp in editor/tests/
4. Architecture check: run file_limits_test (headers ≤ 600 lines)
5. Sprint integration summary step (always the 5th step)
6. Full matrix verification before closing sprint

New sprint starts at Step 689. Create sprint46_plan.md first.

---

Build

# Native build (this machine: Linux x86_64)
cd /home/bill/Documents/CLionProjects/whetstone_DSL
cmake --build editor/build-native --target whetstone_mcp --parallel

# Build the GUI editor too
cmake --build editor/build-native --target whetstone_editor --parallel

# Run a specific step test
./editor/build-native/step688_test

# Run the architecture gate
./editor/build-native/file_limits_test

# Full rebuild from scratch
cd editor
cmake -S . -B build-native -DCMAKE_BUILD_TYPE=Release \
  -DCMAKE_TOOLCHAIN_FILE=/home/bill/vcpkg/scripts/buildsystems/vcpkg.cmake
cmake --build build-native --parallel

vcpkg packages (already installed in editor/build-native/vcpkg_installed/): nlohmann-json, sdl2, imgui, glad, tree-sitter, and language grammars via FetchContent.

---

Key Directories

editor/
  src/             C++ source — all components as single-class headers
  src/mcp/         MCP tool registration headers (Register*.h)
  src/ast/         AST nodes, parsers, generators
  src/state/       EditorState sub-states
  src/panels/      ImGui panel components
  tests/           One test file per step (stepNNN_test.cpp)
  build-native/    Build output (do not commit binaries)
tools/
  claude/
    tools.json     MCP tool catalog (update when adding new tools)

---

Adding a New MCP Tool (Pattern)

1. Implement the C++ class in editor/src/MyFeature.h (≤ 600 lines)
2. Create editor/src/mcp/RegisterMyFeatureTools.h:
   • Define tool name, input schema, handler lambda
   • Handler calls MyFeature::run(args) and returns JSON result
3. Add #include "mcp/RegisterMyFeatureTools.h" to RegisterOnboardingAndAllTools.h
4. Add entry to tools/claude/tools.json
5. Rebuild whetstone_mcp and verify tool appears via MCP initialize response

Reference implementations: RegisterCodegenTools.h, RegisterContextTools.h, RegisterValidationTools.h, RegisterMetricsTools.h

---

MCP Tools by Sprint (Key Tools)

Tool	Sprint	What It Does
whetstone_architect_intake	36	Markdown spec → normalized requirements + conflict report
whetstone_generate_taskitems	36	Requirements → AnnotatedTaskitems with confidence/escalate
whetstone_queue_ready	36	Validate taskitem set → confirmed queue
whetstone_schema_to_cpp	41	JSON Schema → typed C++ header + CMake snippet
whetstone_generate_dispatch_table	41	Job entries → C++ dispatch table header
whetstone_assemble_context	43	Workspace symbol lookup → token-budget-trimmed context slice
whetstone_validate_taskitem	44	Score taskitem self-containment (0–100), batch audit report
whetstone_start_recording	45	Start per-session tool-call recording
whetstone_get_metrics	45	Get session metrics + A/B comparison vs baseline

Full tool list: tools/claude/tools.json (90 entries).

---

Architecture Constraints

• No header may exceed 600 lines — enforced by file_limits_test
• Single-class-per-header pattern throughout
• MCP tools are thin wiring only — business logic lives in the feature class
• tools.json must be updated every time a tool is added/removed
• Never touch whetstone_mcp for GUI-only features; keep headless binary lean

---

Relationship to HiveMind

Whetstone generates code for HiveMind (schema→C++ structs, dispatch tables). HiveMind is a consumer of the MCP tools. The two projects are independent:

• Whetstone source: CLionProjects/whetstone_DSL/ — this directory
• HiveMind source: Documents/hivemind/ — separate project
• Do NOT modify Whetstone when working on HiveMind, and vice versa

Whetstone MCP is registered at Documents/.mcp.json so it's available as a tool server in Claude Code sessions opened from Documents/.