HartOMat/docs/workflows/WORKFLOW_IMPLEMENTATION_BACKLOG.md

Workflow Implementation Backlog

Epic 1: Canonical Workflow Model

Tickets

• E1-T1 Finalize canonical workflow JSON schema with version, nodes, edges, and optional ui.
• E1-T2 Align frontend workflow API types with the backend schema.
• E1-T3 Extend backend validation for duplicate IDs, invalid edges, unknown steps, and invalid params.
• E1-T4 Add migration helpers for existing preset configs: still, turntable, multi_angle, still_with_exports.
• E1-T5 Add tests for preset-to-DAG migration.

Primary Files

• backend/app/domains/rendering/workflow_schema.py
• frontend/src/api/workflows.ts
• frontend/src/pages/WorkflowEditor.tsx

Epic 2: Node Registry and Settings Schemas

Tickets

• E2-T1 Add a backend NodeDefinitionRegistry.
• E2-T2 Define metadata and settings schema for each workflow node.
• E2-T3 Add GET /api/workflows/node-definitions.
• E2-T4 Provide schema-driven defaults and editor field groups.
• E2-T5 Add composite bridge nodes for safe migration.

Required Node Coverage

• resolve_step_path
• occ_object_extract
• occ_glb_export
• glb_bbox
• material_map_resolve
• auto_populate_materials
• blender_render
• threejs_render
• thumbnail_save
• order_line_setup
• resolve_template
• blender_still
• blender_turntable
• output_save
• export_blend
• stl_cache_generate
• notify

Epic 3: Legacy Step Extraction

Tickets

• E3-T1 Create a parity matrix from the legacy render pipeline.
• E3-T2 Extract order_line_setup into a reusable service/task. completed
• E3-T3 Extract resolve_template. completed
• E3-T4 Extract material_map_resolve. completed
• E3-T5 Extract auto_populate_materials. completed
• E3-T6 Extract glb_bbox. completed
• E3-T7 Extract output_save. completed
• E3-T8 Extract notify. completed
• E3-T9 Add executor tests for all extracted nodes.

Legacy Sources

• backend/app/domains/pipeline/tasks/render_order_line.py
• backend/app/domains/rendering/tasks.py
• backend/app/core/process_steps.py

Epic 4: Graph Runtime

Tickets

• E4-T1 Introduce WorkflowContext.
• E4-T2 Refactor executor to process nodes against context and node outputs.
• E4-T3 Persist node-level run records, logs, timings, and outputs.
• E4-T4 Support retry and failure policies.
• E4-T5 Add execution mode switch: legacy, graph, shadow.
• E4-T6 Add hard fallback to legacy dispatch on graph failure.

Epic 5: Editor Parity

Tickets

• E5-T1 Save and load edges.
• E5-T2 Replace pipeline_step in node UI data with canonical node step.
• E5-T3 Render node settings from backend schemas.
• E5-T4 Add graph validation in the editor.
• E5-T5 Add dry-run and dispatch from the editor.
• E5-T6 Add workflow run inspection UI.

Epic 6: Rollout and Quality

Tickets

• E6-T1 Add shadow mode parity execution.
• E6-T2 Build output comparison tooling.
• E6-T3 Define golden test cases.
• E6-T4 Roll out per workflow or output type.
• E6-T5 Keep legacy fallback after rollout.