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name: autofix-undeclared-identifier description: Fixes 'undeclared identifier' errors by adding missing #include or namespace qualifiers.

Undeclared Identifier Skill

Fixes errors where a symbol is used but not declared in the current scope.

Detection Patterns

• use of undeclared identifier 'X'
• 'X' was not declared in this scope
• error: 'X' undeclared

Strategy

1. Extract Identifier: Get the undeclared symbol name.
2. Classify Symbol: Is it a standard library symbol, project symbol, or macro?
3. Find Definition: Search the codebase for where this symbol is defined.
4. Add Include/Import: Add the necessary #include or using statement.

Instructions

Step 1: Identify the Symbol

Parse the error message to extract the undeclared identifier.

Step 2: Check Standard Library

Common C++ standard library symbols:

Step 3: Search Project for Definition

If not a standard symbol, search the codebase:

Copygrep -r "class X" --include="*.h"
grep -r "struct X" --include="*.h"
grep -r "#define X" --include="*.h"

Step 4: Apply Fix

Add the appropriate #include at the top of the file:

Copy#include <vector>  // For std::vector
#include "project/MyClass.h"  // For project symbols

Or add namespace qualifier:

Copystd::vector<int> items;  // Instead of: vector<int> items;