Transpilation Options

The [transpilation] section controls the Phase 2 transpilation pipeline: output location, caching, and per-tool behavior for Depyler, Decy, and Bashrs.

Top-Level Settings

[transpilation]
output_dir = "./rust-output"
incremental = true
cache = true
use_ruchy = false
ruchy_strictness = "gradual"
modules = []

Key	Type	Default	Description
`output_dir`	string	`"./rust-output"`	Directory for generated Rust code
`incremental`	bool	`true`	Only re-transpile changed files
`cache`	bool	`true`	Cache transpilation results across runs
`use_ruchy`	bool	`false`	Generate Ruchy (gradual Rust) instead of pure Rust
`ruchy_strictness`	string	`"gradual"`	Ruchy strictness: `"permissive"`, `"gradual"`, or `"strict"`
`modules`	array	`[]`	Specific modules to transpile (empty means all)

Depyler (Python to Rust)

[transpilation.depyler]
type_inference = true
numpy_to_trueno = true
sklearn_to_aprender = true
pytorch_to_realizar = true

Key	Type	Default	Description
`type_inference`	bool	`true`	Infer Rust types from Python type hints and usage
`numpy_to_trueno`	bool	`true`	Map NumPy operations to Trueno SIMD primitives
`sklearn_to_aprender`	bool	`true`	Map scikit-learn algorithms to Aprender
`pytorch_to_realizar`	bool	`true`	Map PyTorch inference to Realizar (inference only)

When ML framework detection is enabled and dependencies are found in requirements.txt or pyproject.toml, these flags are set to true automatically by batuta init.

Decy (C/C++ to Rust)

[transpilation.decy]
ownership_inference = true
actionable_diagnostics = true
use_static_fixer = true

Key	Type	Default	Description
`ownership_inference`	bool	`true`	Infer Rust ownership from pointer lifetimes
`actionable_diagnostics`	bool	`true`	Emit fix-it style diagnostics for manual review
`use_static_fixer`	bool	`true`	Apply StaticFixer transforms for common C patterns

Bashrs (Shell to Rust)

[transpilation.bashrs]
target_shell = "bash"
use_clap = true

Key	Type	Default	Description
`target_shell`	string	`"bash"`	Shell dialect to parse (`"bash"`, `"sh"`, `"zsh"`)
`use_clap`	bool	`true`	Generate CLI argument parsing with the `clap` crate

Custom Tool Registration

Custom transpilers can be registered through the plugin system. See Custom Transpiler Flags for passing flags to external tools and the Plugin Architecture chapter for the full plugin API.

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