feat(plugin): add user prompt pattern analysis for personalized shortcuts

Implement PromptPatternAnalyzer module that classifies user prompts into
categories (test, debug, refactor, build, deploy, etc.) and suggests
matching shortcuts/skills based on frequency. Privacy-first: stores only
category counts locally, never raw prompts. Opt-in via config.

Closes #1003

Author: JeremyDev87

packages/claude-code-plugin/hooks/lib/prompt_pattern_analyzer.py

@@ -0,0 +1,348 @@
+"""User prompt pattern analysis for personalized shortcut suggestions.
+
+Analyzes prompt patterns locally to suggest matching shortcuts/skills.
+Privacy-first: stores only category counts, never raw prompts.
+Opt-in via ``promptPatternAnalysis.enabled`` in codingbuddy.config.json.
+"""
+
+import json
+import logging
+import os
+from typing import Any, Dict, List, Optional
+
+logger = logging.getLogger(__name__)
+
+PATTERNS_FILE = "patterns.json"
+
+# Keyword-to-category mapping for prompt classification.
+# Order matters: first match wins.
+CATEGORY_KEYWORDS: Dict[str, List[str]] = {
+    "test": [
+        "test",
+        "테스트",
+        "pytest",
+        "jest",
+        "spec",
+        "coverage",
+        "assertion",
+    ],
+    "debug": [
+        "fix",
+        "bug",
+        "error",
+        "debug",
+        "디버그",
+        "수정",
+        "오류",
+        "issue",
+        "broken",
+        "crash",
+        "fail",
+    ],
+    "refactor": [
+        "refactor",
+        "리팩토링",
+        "리팩터",
+        "clean",
+        "restructure",
+        "simplify",
+        "extract",
+    ],
+    "build": [
+        "build",
+        "compile",
+        "빌드",
+        "bundle",
+        "webpack",
+        "vite",
+        "esbuild",
+    ],
+    "deploy": [
+        "deploy",
+        "배포",
+        "release",
+        "ship",
+        "publish",
+        "production",
+    ],
+    "review": [
+        "review",
+        "리뷰",
+        "pr",
+        "pull request",
+        "코드 리뷰",
+        "check",
+    ],
+    "docs": [
+        "doc",
+        "문서",
+        "readme",
+        "comment",
+        "documentation",
+        "jsdoc",
+    ],
+    "create": [
+        "create",
+        "생성",
+        "new",
+        "add",
+        "만들",
+        "component",
+        "feature",
+        "implement",
+    ],
+    "git": [
+        "commit",
+        "push",
+        "merge",
+        "branch",
+        "rebase",
+        "cherry-pick",
+        "stash",
+    ],
+    "security": [
+        "security",
+        "보안",
+        "vulnerab",
+        "auth",
+        "permission",
+        "xss",
+        "injection",
+        "csrf",
+    ],
+    "performance": [
+        "performance",
+        "성능",
+        "optimi",
+        "slow",
+        "fast",
+        "latency",
+        "memory",
+        "cache",
+    ],
+}
+
+# Shortcut/skill suggestions per category.
+_SHORTCUT_MAP: Dict[str, Dict[str, str]] = {
+    "test": {
+        "shortcut": "/tdd",
+        "skill": "superpowers:test-driven-development",
+        "description": "Run TDD workflow for test-first development",
+    },
+    "debug": {
+        "shortcut": "/debug",
+        "skill": "superpowers:systematic-debugging",
+        "description": "Systematic debugging with root cause analysis",
+    },
+    "refactor": {
+        "shortcut": "/simplify",
+        "skill": "simplify",
+        "description": "Review and simplify code for quality",
+    },
+    "build": {
+        "shortcut": "/build-fix",
+        "skill": "oh-my-claudecode:build-fix",
+        "description": "Fix build and compilation errors",
+    },
+    "deploy": {
+        "shortcut": "/ship",
+        "skill": "ship",
+        "description": "Run CI checks and ship changes",
+    },
+    "review": {
+        "shortcut": "/code-review",
+        "skill": "oh-my-claudecode:code-review",
+        "description": "Run comprehensive code review",
+    },
+    "docs": {
+        "shortcut": "/plan",
+        "skill": "oh-my-claudecode:plan",
+        "description": "Plan documentation structure",
+    },
+    "create": {
+        "shortcut": "/brainstorm",
+        "skill": "superpowers:brainstorming",
+        "description": "Brainstorm before creating new features",
+    },
+    "git": {
+        "shortcut": "/git-master",
+        "skill": "oh-my-claudecode:git-master",
+        "description": "Git expert for commits and history management",
+    },
+    "security": {
+        "shortcut": "/security-review",
+        "skill": "oh-my-claudecode:security-review",
+        "description": "Run comprehensive security review",
+    },
+    "performance": {
+        "shortcut": "/analyze",
+        "skill": "oh-my-claudecode:analyze",
+        "description": "Deep analysis and investigation",
+    },
+}
+
+
+def classify_prompt(prompt: str) -> str:
+    """Classify a prompt into a category using keyword matching.
+
+    Privacy: only returns a category string, never stores the prompt.
+
+    Args:
+        prompt: Raw user prompt text.
+
+    Returns:
+        Category string (e.g. "test", "debug") or "other".
+    """
+    if not prompt:
+        return "other"
+    lower = prompt.lower()
+    for category, keywords in CATEGORY_KEYWORDS.items():
+        for kw in keywords:
+            if kw in lower:
+                return category
+    return "other"
+
+
+class PromptPatternAnalyzer:
+    """Analyzes user prompt patterns and suggests personalized shortcuts.
+
+    Stores only category frequency counts locally. Never stores raw prompts.
+    Must be explicitly enabled via config (opt-in).
+    """
+
+    def __init__(self, data_dir: str, enabled: bool = False) -> None:
+        self._data_dir = data_dir
+        self._enabled = enabled
+        self._categories: Dict[str, int] = {}
+        self._total: int = 0
+
+        if self._enabled:
+            os.makedirs(self._data_dir, exist_ok=True)
+            self._load()
+
+    @property
+    def enabled(self) -> bool:
+        return self._enabled
+
+    @classmethod
+    def from_config(
+        cls,
+        config: Dict[str, Any],
+        data_dir: str,
+    ) -> "PromptPatternAnalyzer":
+        """Create an analyzer from codingbuddy config.
+
+        Args:
+            config: Parsed codingbuddy.config.json dict.
+            data_dir: Default data directory path.
+
+        Returns:
+            Configured PromptPatternAnalyzer instance.
+        """
+        ppa_config = config.get("promptPatternAnalysis", {})
+        enabled = ppa_config.get("enabled", False)
+        custom_dir = ppa_config.get("dataDir", None)
+        return cls(
+            data_dir=custom_dir or data_dir,
+            enabled=bool(enabled),
+        )
+
+    def record_prompt(self, prompt: str) -> None:
+        """Record a prompt by classifying and incrementing the category count.
+
+        Args:
+            prompt: Raw user prompt text (not stored).
+        """
+        if not self._enabled:
+            return
+
+        category = classify_prompt(prompt)
+        self._categories[category] = self._categories.get(category, 0) + 1
+        self._total += 1
+        self._save()
+
+    def analyze_patterns(self, top_n: int = 10) -> List[Dict[str, Any]]:
+        """Return top N most frequent prompt categories.
+
+        Args:
+            top_n: Maximum number of patterns to return.
+
+        Returns:
+            List of dicts with keys: category, count, percentage.
+            Sorted by count descending.
+        """
+        if not self._enabled or not self._categories:
+            return []
+
+        sorted_cats = sorted(
+            self._categories.items(), key=lambda x: x[1], reverse=True
+        )[:top_n]
+
+        total = self._total if self._total > 0 else 1
+        return [
+            {
+                "category": cat,
+                "count": count,
+                "percentage": round((count / total) * 100, 1),
+            }
+            for cat, count in sorted_cats
+        ]
+
+    def suggest_shortcuts(
+        self, min_count: int = 3
+    ) -> List[Dict[str, Any]]:
+        """Suggest shortcuts/skills based on frequent patterns.
+
+        Args:
+            min_count: Minimum category count to trigger a suggestion.
+
+        Returns:
+            List of suggestion dicts with keys:
+            category, count, shortcut, skill, description.
+        """
+        if not self._enabled:
+            return []
+
+        suggestions = []
+        for cat, count in sorted(
+            self._categories.items(), key=lambda x: x[1], reverse=True
+        ):
+            if count < min_count:
+                continue
+            mapping = _SHORTCUT_MAP.get(cat)
+            if mapping is None:
+                continue
+            suggestions.append(
+                {
+                    "category": cat,
+                    "count": count,
+                    **mapping,
+                }
+            )
+        return suggestions
+
+    def _load(self) -> None:
+        """Load pattern data from disk."""
+        path = os.path.join(self._data_dir, PATTERNS_FILE)
+        if not os.path.isfile(path):
+            return
+        try:
+            with open(path, "r", encoding="utf-8") as f:
+                data = json.load(f)
+            self._categories = data.get("categories", {})
+            self._total = data.get("total", 0)
+        except (json.JSONDecodeError, OSError) as e:
+            logger.warning("Failed to load pattern data: %s", e)
+
+    def _save(self) -> None:
+        """Persist pattern data to disk."""
+        path = os.path.join(self._data_dir, PATTERNS_FILE)
+        try:
+            with open(path, "w", encoding="utf-8") as f:
+                json.dump(
+                    {"categories": self._categories, "total": self._total},
+                    f,
+                    indent=2,
+                )
+        except OSError as e:
+            logger.warning("Failed to save pattern data: %s", e)