Sync usage rules

CLAUDE.md

@@ -241,26 +241,21 @@ usage rules to understand the correct patterns, conventions, and best practices.
 <!-- usage-rules-header-end -->
 
 <!-- igniter-start -->
-
 ## igniter usage
-
 _A code generation and project patching framework
 _
 
 [igniter usage rules](deps/igniter/usage-rules.md)
-
 <!-- igniter-end -->
 <!-- usage_rules-start -->
-
 ## usage_rules usage
-
 _A dev tool for Elixir projects to gather LLM usage rules from dependencies
 _
 
 ## Using Usage Rules
 
-Many packages have usage rules, which you should _thoroughly_ consult before taking any
-action. These usage rules contain guidelines and rules _directly from the package authors_.
+Many packages have usage rules, which you should *thoroughly* consult before taking any
+action. These usage rules contain guidelines and rules *directly from the package authors*.
 They are your best source of knowledge for making decisions.
 
 ## Modules & functions in the current app and dependencies
@@ -279,6 +274,7 @@ mix usage_rules.docs Enum.zip
 mix usage_rules.docs Enum.zip/1
 ```
 
+
 ## Searching Documentation
 
 You should also consult the documentation of any tools you are using, early and often. The best 
@@ -299,26 +295,22 @@ mix usage_rules.search_docs "making requests" -p req
 mix usage_rules.search_docs "Enum.zip" --query-by title
 ```
 
+
 <!-- usage_rules-end -->
 <!-- usage_rules:elixir-start -->
-
 ## usage_rules:elixir usage
-
 # Elixir Core Usage Rules
 
 ## Pattern Matching
-
 - Use pattern matching over conditional logic when possible
 - Prefer to match on function heads instead of using `if`/`else` or `case` in function bodies
 
 ## Error Handling
-
 - Use `{:ok, result}` and `{:error, reason}` tuples for operations that can fail
 - Avoid raising exceptions for control flow
 - Use `with` for chaining operations that return `{:ok, _}` or `{:error, _}`
 
 ## Common Mistakes to Avoid
-
 - Elixir has no `return` statement, nor early returns. The last expression in a block is always returned.
 - Don't use `Enum` functions on large collections when `Stream` is more appropriate
 - Avoid nested `case` statements - refactor to a single `case`, `with` or separate functions
@@ -331,7 +323,6 @@ mix usage_rules.search_docs "Enum.zip" --query-by title
 - There are many useful standard library functions, prefer to use them where possible
 
 ## Function Design
-
 - Use guard clauses: `when is_binary(name) and byte_size(name) > 0`
 - Prefer multiple function clauses over complex conditional logic
 - Name functions descriptively: `calculate_total_price/2` not `calc/2`
@@ -339,7 +330,6 @@ mix usage_rules.search_docs "Enum.zip" --query-by title
 - Names like `is_thing` should be reserved for guards
 
 ## Data Structures
-
 - Use structs over maps when the shape is known: `defstruct [:name, :age]`
 - Prefer keyword lists for options: `[timeout: 5000, retries: 3]`
 - Use maps for dynamic key-value data
@@ -352,41 +342,38 @@ mix usage_rules.search_docs "Enum.zip" --query-by title
 - Read the docs and options fully before using tasks
 
 ## Testing
-
-- Run tests in a specific file with `mix test test/my_test.exs` and a specific test
-  with the line number `mix test path/to/test.exs:123`
+- Run tests in a specific file with `mix test test/my_test.exs` and a specific test with the line number `mix test path/to/test.exs:123`
 - Limit the number of failed tests with `mix test --max-failures n`
 - Use `@tag` to tag specific tests, and `mix test --only tag` to run only those tests
 - Use `assert_raise` for testing expected exceptions: `assert_raise ArgumentError, fn -> invalid_function() end`
+- Use `mix help test` to for full documentation on running tests
+
+## Debugging
+
+- Use `dbg/1` to print values while debugging. This will display the formatted value and other relevant information in the console.
 
 <!-- usage_rules:elixir-end -->
 <!-- usage_rules:otp-start -->
-
 ## usage_rules:otp usage
-
 # OTP Usage Rules
 
 ## GenServer Best Practices
-
 - Keep state simple and serializable
 - Handle all expected messages explicitly
 - Use `handle_continue/2` for post-init work
 - Implement proper cleanup in `terminate/2` when necessary
 
 ## Process Communication
-
 - Use `GenServer.call/3` for synchronous requests expecting replies
 - Use `GenServer.cast/2` for fire-and-forget messages.
 - When in doubt, us `call` over `cast`, to ensure back-pressure
 - Set appropriate timeouts for `call/3` operations
 
 ## Fault Tolerance
-
 - Set up processes such that they can handle crashing and being restarted by supervisors
 - Use `:max_restarts` and `:max_seconds` to prevent restart loops
 
 ## Task and Async
-
 - Use `Task.Supervisor` for better fault tolerance
 - Handle task failures with `Task.yield/2` or `Task.shutdown/2`
 - Set appropriate task timeouts