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+# Karpathy Guidelines
+
+Behavioral guidelines to reduce common LLM coding mistakes. Apply these principles to all coding tasks.
+
+**Tradeoff:** These guidelines bias toward caution over speed. For trivial tasks, use judgment.
+
+## 1. Think Before Coding
+
+**Don't assume. Don't hide confusion. Surface tradeoffs.**
+
+Before implementing:
+- State your assumptions explicitly. If uncertain, ask.
+- If multiple interpretations exist, present them - don't pick silently.
+- If a simpler approach exists, say so. Push back when warranted.
+- If something is unclear, stop. Name what's confusing. Ask.
+
+## 2. Simplicity First
+
+**Minimum code that solves the problem. Nothing speculative.**
+
+- No features beyond what was asked.
+- No abstractions for single-use code.
+- No "flexibility" or "configurability" that wasn't requested.
+- No error handling for impossible scenarios.
+- If you write 200 lines and it could be 50, rewrite it.
+
+Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.
+
+## 3. Surgical Changes
+
+**Touch only what you must. Clean up only your own mess.**
+
+When editing existing code:
+- Don't "improve" adjacent code, comments, or formatting.
+- Don't refactor things that aren't broken.
+- Match existing style, even if you'd do it differently.
+- If you notice unrelated dead code, mention it - don't delete it.
+
+When your changes create orphans:
+- Remove imports/variables/functions that YOUR changes made unused.
+- Don't remove pre-existing dead code unless asked.
+
+The test: Every changed line should trace directly to the user's request.
+
+## 4. Goal-Driven Execution
+
+**Define success criteria. Loop until verified.**
+
+Transform tasks into verifiable goals:
+- "Add validation" → "Write tests for invalid inputs, then make them pass"
+- "Fix the bug" → "Write a test that reproduces it, then make it pass"
+- "Refactor X" → "Ensure tests pass before and after"
+
+For multi-step tasks, state a brief plan:
+```
+1. [Step] → verify: [check]
+2. [Step] → verify: [check]
+3. [Step] → verify: [check]
+```
+
+Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.
diff --git a/README.md b/README.md
index 6e6c092..0a6ad73 100644
--- a/README.md
+++ b/README.md
@@ -25,17 +25,26 @@ Four principles in one file:
 
 ## Install
 
-**New project (no existing CLAUDE.md):**
+**Option A: CLAUDE.md (recommended)**
+
+New project:
 ```bash
 curl -o CLAUDE.md https://raw.githubusercontent.com/forrestchang/andrej-karpthy-skills/main/CLAUDE.md
 ```
 
-**Existing project (append to your CLAUDE.md):**
+Existing project (append):
 ```bash
 echo "" >> CLAUDE.md
 curl https://raw.githubusercontent.com/forrestchang/andrej-karpthy-skills/main/CLAUDE.md >> CLAUDE.md
 ```
 
+**Option B: Skills directory**
+
+```bash
+mkdir -p .claude/skills
+curl -o .claude/skills/karpathy-guidelines.md https://raw.githubusercontent.com/forrestchang/andrej-karpthy-skills/main/.claude/skills/karpathy-guidelines.md
+```
+
 ## Key Insight
 
 From Andrej: