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Search code by AST structure using ast-grep. Find semantic patterns like function calls, imports, class definitions instead of text patterns.
Passed 18 of 25 test cases with the skill, and 10 of 25 without it.
and 5 more in the full report
8 fixed10 passed either way7 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.
I need an ast-grep command to search through my Python codebase for function definitions that accept any number of arguments. What command should I execute?
| Checked | Without skill | With skill |
|---|---|---|
| The command uses sg -p with the pattern 'def $NAME($$$): $$$' | Missed | Passed |
| The command includes --lang python | Passed | Passed |
The instructions your model reads when the skill loads.
Search code by its abstract syntax tree (AST) structure. Finds semantic patterns that regex cannot match reliably.
| Tool | Command | Use For |
|---|---|---|
| ast-grep | sg -p 'pattern' | AST-aware code search |
| Pattern | Matches | Example |
|---|---|---|
$NAME | Named identifier | function $NAME() {} |
$_ | Any single node | console.log($_) |
$$$ | Zero or more nodes | function $_($$$) {} |
# 1. Find console.log calls
sg -p 'console.log($_)'
# 2. Find React hooks
sg -p 'const [$_, $_] = useState($_)'
sg -p 'useEffect($_, [$$$])'
# 3. Find function definitions
sg -p 'function $NAME($$$) { $$$ }'
sg -p 'def $NAME($$$): $$$' --lang python
# 4. Find imports
sg -p 'import $_ from "$_"'
sg -p 'from $_ import $_' --lang python
# 5. Find async patterns
sg -p 'await $_'
sg -p 'async function $NAME($$$) { $$$ }'
test cases passed, vs 10 / 25 without
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