let-chains-advisor
Identifies deeply nested if-let expressions and suggests let chains for cleaner control flow. Activates when users write nested conditionals with pattern matching.
Best use case
let-chains-advisor is best used when you need a repeatable AI agent workflow instead of a one-off prompt. It is especially useful for teams working in multi. Identifies deeply nested if-let expressions and suggests let chains for cleaner control flow. Activates when users write nested conditionals with pattern matching.
Identifies deeply nested if-let expressions and suggests let chains for cleaner control flow. Activates when users write nested conditionals with pattern matching.
Users should expect a more consistent workflow output, faster repeated execution, and less time spent rewriting prompts from scratch.
Practical example
Example input
Use the "let-chains-advisor" skill to help with this workflow task. Context: Identifies deeply nested if-let expressions and suggests let chains for cleaner control flow. Activates when users write nested conditionals with pattern matching.
Example output
A structured workflow result with clearer steps, more consistent formatting, and an output that is easier to reuse in the next run.
When to use this skill
- Use this skill when you want a reusable workflow rather than writing the same prompt again and again.
When not to use this skill
- Do not use this when you only need a one-off answer and do not need a reusable workflow.
- Do not use it if you cannot install or maintain the related files, repository context, or supporting tools.
Installation
Claude Code / Cursor / Codex
Manual Installation
- Download SKILL.md from GitHub
- Place it in
.claude/skills/let-chains-advisor/SKILL.mdinside your project - Restart your AI agent — it will auto-discover the skill
How let-chains-advisor Compares
| Feature / Agent | let-chains-advisor | Standard Approach |
|---|---|---|
| Platform Support | Not specified | Limited / Varies |
| Context Awareness | High | Baseline |
| Installation Complexity | Unknown | N/A |
Frequently Asked Questions
What does this skill do?
Identifies deeply nested if-let expressions and suggests let chains for cleaner control flow. Activates when users write nested conditionals with pattern matching.
Where can I find the source code?
You can find the source code on GitHub using the link provided at the top of the page.
SKILL.md Source
# Let Chains Advisor Skill
You are an expert at using let chains (Rust 2024) to simplify control flow. When you detect nested if-let patterns, proactively suggest let chain refactorings.
## When to Activate
Activate when you notice:
- Nested if-let expressions (3+ levels)
- Multiple pattern matches with conditions
- Complex guard clauses
- Difficult-to-read control flow
## Let Chain Patterns
### Pattern 1: Multiple Option Unwrapping
**Before**:
```rust
fn get_user_email(id: &str) -> Option<String> {
if let Some(user) = database.find_user(id) {
if let Some(profile) = user.profile {
if let Some(email) = profile.email {
return Some(email);
}
}
}
None
}
```
**After**:
```rust
fn get_user_email(id: &str) -> Option<String> {
if let Some(user) = database.find_user(id)
&& let Some(profile) = user.profile
&& let Some(email) = profile.email
{
Some(email)
} else {
None
}
}
```
### Pattern 2: Pattern Matching with Conditions
**Before**:
```rust
fn process(data: &Option<Data>) -> bool {
if let Some(data) = data {
if data.is_valid() {
if data.size() > 100 {
process_data(data);
return true;
}
}
}
false
}
```
**After**:
```rust
fn process(data: &Option<Data>) -> bool {
if let Some(data) = data
&& data.is_valid()
&& data.size() > 100
{
process_data(data);
true
} else {
false
}
}
```
### Pattern 3: Multiple Result Checks
**Before**:
```rust
fn load_config() -> Result<Config, Error> {
if let Ok(path) = get_config_path() {
if let Ok(content) = std::fs::read_to_string(path) {
if let Ok(config) = toml::from_str(&content) {
return Ok(config);
}
}
}
Err(Error::ConfigNotFound)
}
```
**After**:
```rust
fn load_config() -> Result<Config, Error> {
if let Ok(path) = get_config_path()
&& let Ok(content) = std::fs::read_to_string(path)
&& let Ok(config) = toml::from_str(&content)
{
Ok(config)
} else {
Err(Error::ConfigNotFound)
}
}
```
### Pattern 4: While Loops
**Before**:
```rust
while let Some(item) = iterator.next() {
if item.is_valid() {
if let Ok(processed) = process_item(item) {
results.push(processed);
}
}
}
```
**After**:
```rust
while let Some(item) = iterator.next()
&& item.is_valid()
&& let Ok(processed) = process_item(item)
{
results.push(processed);
}
```
## Requirements
- **Rust Version**: 1.88+
- **Edition**: 2024
- **Cargo.toml**:
```toml
[package]
edition = "2024"
rust-version = "1.88"
```
## Your Approach
When you see nested patterns:
1. Count nesting levels (3+ suggests let chains)
2. Check if all branches return/continue
3. Suggest let chain refactoring
4. Verify Rust version compatibility
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