lightflow-image-invert

# LightFlow Image Invert Use this skill to invert the colors of a PNG image generated or referenced by a LightFlow workflow. ## Workflow - Workflow id: `lightflow.image_invert` - Runtime ownership: this workflow crate owns its public `execute()` entry and exposes it through the `lightflow-image-invert-runner` package binary. - Host engine: `package.command.v1`; discovery, help, and plan do not execute package source. - Input values are validated against their declared JSON types without string coercion. - Input `image_path`: required source PNG path; artifact kind `image`; widget `image`. - Input `output_path`: optional destination PNG path; artifact kind `image`; widget `file_save`. - Output `image_path`: inverted PNG path; artifact kind `image`. - Output `image`: image artifact metadata; artifact kind `image`. ## Pipeline Usage Quote or escape the pipe token so the shell passes it to `lfw`: ```bash lfw run lightflow.text_to_image \ -i prompt='"a small cat photo"' \ -i output_path='"out/cat.png"' \ '|' lightflow.image_invert \ -i output_path='"out/cat-inverted.png"' ``` The second stage receives the first stage outputs as inputs. Set `output_path` on the invert stage to avoid writing beside the source image. ## API Usage Start `lfw serve`, then call the workflow through the shared HTTP run contract. Adjust `inputs` to match the workflow contract above. ```bash curl -sS -X POST http://127.0.0.1:5174/workflows/lightflow.image_invert/run \ -H 'content-type: application/json' \ -d '{"inputs":{}}' ```