feat: CxIDE v1 — native macOS SwiftUI IDE with agentic AI assistant

- SwiftUI macOS app with C++17 code analysis engine (ObjC++ bridge)
- Agentic AI loop: LLM plans → tool calls → execution → feedback loop
- 15 agent tools: file ops, terminal, git, xcode build, code intel
- 7 persistent terminal tools with background session management
- Chat sidebar with agent step rendering and auto-apply
- NVIDIA NIM API integration (Llama 3.3 70B default)
- OpenAI tool_calls format with prompt-based fallback
- Code editor with syntax highlighting and multi-tab support
- File tree, console view, terminal view
- Git integration and workspace management

hooks/commit-msg

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# ──────────────────────────────────────────────────────────────────
+# CxIDE — commit-msg hook
+# Enforces conventional commit message format.
+# Install: cp hooks/commit-msg .git/hooks/commit-msg
+# ──────────────────────────────────────────────────────────────────
+set -euo pipefail
+
+COMMIT_MSG_FILE="$1"
+MSG="$(head -1 "$COMMIT_MSG_FILE")"
+
+RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'; RESET='\033[0m'
+
+# ─── Conventional Commits format ─────────────────────────────────
+# type(scope): description
+# Types: feat, fix, refactor, docs, test, build, ci, chore, perf, style, agent
+PATTERN='^(feat|fix|refactor|docs|test|build|ci|chore|perf|style|agent)(\([a-z0-9-]+\))?: .{3,72}$'
+
+if ! echo "$MSG" | grep -qE "$PATTERN"; then
+    echo ""
+    printf "${RED}✗ Invalid commit message format${RESET}\n"
+    echo ""
+    echo "  Expected: type(scope): description"
+    echo ""
+    echo "  Types:  feat, fix, refactor, docs, test, build, ci, chore, perf, style, agent"
+    echo "  Scopes: core, agent, views, models, services, vm, engine, tools (optional)"
+    echo ""
+    echo "  Examples:"
+    echo "    feat(agent): add code review tool"
+    echo "    fix(core): correct cyclomatic complexity for switch"
+    echo "    docs: update build instructions"
+    echo "    refactor(views): split sidebar into components"
+    echo ""
+    printf "  Your message: ${YELLOW}%s${RESET}\n" "$MSG"
+    echo ""
+    exit 1
+fi
+
+# ─── Reject WIP on main/master ──────────────────────────────────
+BRANCH="$(git symbolic-ref --short HEAD 2>/dev/null || echo '')"
+if [[ "$BRANCH" == "main" || "$BRANCH" == "master" ]]; then
+    if echo "$MSG" | grep -qiE '^(wip|fixup|squash)'; then
+        printf "${RED}✗ WIP/fixup/squash commits not allowed on %s${RESET}\n" "$BRANCH"
+        exit 1
+    fi
+fi
+
+printf "${GREEN}✓${RESET} Commit message OK\n"