# bf-4zhtc: Validate profile_yaml fuzz harness source code

**Date:** 2026-07-06
**Status:** PASS

## Acceptance Criteria Validation

### ✓ fuzz/fuzz_targets/profile_yaml.rs exists and is readable
- File exists at `/home/coding/pdftract/fuzz/fuzz_targets/profile_yaml.rs`
- File size: 766 bytes
- Readable and properly formatted

### ✓ File contains valid Rust code structure
- Correct `#![no_main]` attribute for fuzz targets
- Proper `use libfuzzer_sys::fuzz_target;` import
- Valid `fuzz_target!(|data: &[u8]| { ... });` macro usage
- Expected rustc error about `libfuzzer_sys` is normal for fuzz-only dependencies

### ✓ No obvious syntax errors when viewing the file
- Proper UTF-8 handling with early return on invalid UTF-8
- Clean closure structure
- Well-documented with INV-8 (no panic at public boundary) reference

### ✓ Imports match patterns used in other working fuzz targets
- Pattern matches other targets (content.rs, cmap_parser.rs, stream_decoder.rs)
- Uses same `libfuzzer_sys::fuzz_target` pattern
- Follows same documentation style with INV-8 reference

### ✓ Target function exists
- Verified `pdftract_core::profiles::load_profile_yaml` exists in `crates/pdftract-core/src/profiles/loader.rs`
- Function signature: `pub fn load_profile_yaml(content: &str) -> Result<Value, ProfileLoadError>`

### ✓ Cargo.toml configuration
- `libfuzzer-sys = { version = "0.4", features = ["arbitrary-derive"] }` properly configured
- `pdftract-core = { path = "../crates/pdftract-core", features = ["profiles"] }` includes profiles feature
- `[[bin]]` target for `profile_yaml` properly registered (lines 43-45)

## Conclusion
The profile_yaml fuzz harness source code is valid and properly configured. No issues found. Ready for build testing.