Replace provider-switching task nodes with provider-specific config nodes and stable generic image/video execution contracts. Add Agnes Image 2.1 and Video 2.0 using behavior verified against the live API.
Constraint: Old workflows are intentionally unsupported; Agnes Image 2.0 remains documentation-only.
Rejected: Single task nodes with provider dropdowns | provider-specific union schemas create serialization risk and cross-provider coupling.
Confidence: high
Scope-risk: broad
Directive: New providers must register isolated operation adapters and reuse generic execution nodes without modifying existing provider packages.
Tested: 120 pytest tests; Python compileall; JavaScript syntax; 16 workflow JSON validations; restarted ComfyUI smoke; live Agnes Image 2.1 T2I/I2I; live Agnes Video 2.0 T2V completion and I2V Data URI submission.
Not-tested: User-driven visual inspection of every imported UI workflow and full completed Agnes I2V download.