Individual skill
include-what-you-use
Use when reducing header bloat and compilation cascades with Include What You Use, interpreting IWYU reports, mapping files, forward declarations, or CMake integration.
.devin/skills/include-what-you-use/SKILL.md
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- Last checked
- Nov 4, 2026
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- Sep 28, 2026
- License
- Apache-2.0
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# Include What You Use
IWYU finds `#include` directives a file does not need and ones it implicitly relies on. Grounded against IWYU 0.26.
## Contract
| Field | Bound contract |
|---|---|
| Trigger | The task reduces C/C++ header bloat or compilation cascades, runs or interprets IWYU, writes mapping files, decides between forward declarations and full includes, or wires IWYU into a build. |
| Authority | Reversible local: writes only source files (through `fix_include`), `.imp` mapping files, and build configuration; rollback is version control. No remote mutation. |
| Side effect | `fix_include` edits source files in place; IWYU analysis runs the compiler front end on each translation unit. |
| Done | The IWYU report is produced, applied or triaged, and the project still builds and passes its tests. |
## Inputs