# Workflow Chaining Standards

**Purpose:** How workflows connect in sequences within modules, passing outputs as inputs to next workflows.

---

## Module Workflow Pipeline

**Example:** BMM Module - Idea to Implementation

```
brainstorming → research → brief → PRD → UX → architecture → epics → sprint-planning
                                                        ↓
                                            implement-story → review → repeat
```

Each workflow:
1. Checks for required inputs from prior workflows
2. Validates inputs are complete
3. Produces output for next workflow
4. Recommends next workflow in sequence

---

## Input/Output Contract

### Output Contract (What Each Workflow Produces)

**Every workflow should:**
1. Create output document with predictable filename
2. Include `workflowType` in frontmatter for identification
3. Mark `stepsCompleted: [all steps]` when complete
4. Store in known location (`{module_output_folder}`)

**Example frontmatter:**
```yaml
---
workflowType: 'prd'
stepsCompleted: ['step-01-init', ..., 'step-11-complete']
project_name: 'my-project'
date: '2025-01-02'
nextWorkflow: 'create-ux'
previousWorkflow: 'create-brief'
---
```

### Input Contract (What Each Workflow Consumes)

**Every workflow should:**
1. Define required inputs in Step 1
2. Search in `{module_output_folder}` for prior outputs
3. Validate inputs are complete
4. Allow user to select from discovered documents

---

## Step 1: Input Discovery Pattern

```markdown
## 1. Discover Required Inputs

### Required Inputs:
- {module_output_folder}/prd-{project_name}.md

### Search:
1. Look for prd-{project_name}.md in {module_output_folder}
2. If found → validate completeness
3. If missing or incomplete → error with guidance

"Error: This workflow requires a completed PRD.
Expected location: {module_output_folder}/prd-{project_name}.md
To fix: Run the PRD workflow first, or provide the path to your PRD."
```

---

## Final Step: Next Workflow Recommendation

```markdown
## Next Steps

Based on your completed [workflow], recommended next workflows:

1. **[next-workflow-name]** - [why it's next]
2. **[alternative-workflow]** - [when to use this instead]

Would you like to:
- Run [next-workflow-name] now?
- Run a different workflow?
- Exit for now?
```

**Update output frontmatter:**
```yaml
nextWorkflow: 'create-ux'
nextWorkflowRecommended: true
```

---

## Cross-Workflow Status Tracking

**Optional:** Module can maintain `workflow-status.yaml`:

```yaml
---
current_workflow: 'create-prd'
completed_workflows:
  - brainstorming
  - research
  - brief
pending_workflows:
  - create-ux
  - create-architecture
  - create-epics
  - sprint-planning
outputs:
  brief: '{module_output_folder}/brief-{project_name}.md'
  prd: '{module_output_folder}/prd-{project_name}.md'
---
```

**Workflow checks this file to:**
- Validate sequence (don't run UX before PRD)
- Find output locations
- Track overall progress

---

## Branching Workflows

**Some workflows have multiple valid next steps:**

```markdown
## Next Steps

Based on your project type:

**For software projects:**
- create-architecture - Technical architecture
- create-epics - Break down into epics

**For data projects:**
- data-modeling - Database schema design
- etl-pipeline - Data pipeline design

Which workflow would you like to run next?
```

---

## Required vs Optional Sequences

### Required Sequence
**PRD must come before Architecture:**

```yaml
# In architecture workflow.md
## PREREQUISITE:
This workflow requires a completed PRD.

## INITIALIZATION:
IF prd-{project_name}.md exists AND is complete:
  → Proceed with architecture workflow
ELSE:
  → Error: "Please complete PRD workflow first"
```

### Optional Sequence
**UX research helps Architecture but isn't required:**

```yaml
# In architecture workflow.md
## OPTIONAL INPUTS:
UX research documents can inform technical decisions.

IF ux-research-{project_name}.md exists:
  → "Found UX research. Include findings in architecture design?"
ELSE:
  → "No UX research found. Continuing without it."
```

---

## Filename Conventions for Chaining

**Standard pattern:** `{workflow-name}-{project-name}.md`

| Workflow | Output Filename Pattern |
|----------| ---------------------- |
| brainstorming | `brainstorming-{project_name}.md` |
| brief | `brief-{project_name}.md` |
| PRD | `prd-{project_name}.md` |
| UX | `ux-design-{project_name}.md` |
| architecture | `architecture-{project_name}.md` |
| epics | `epics-{project_name}.md` |

**Predictable filenames enable:**
- Automatic discovery
- Clear dependencies
- Easy validation

---

## Module-Level Workflow Registry

**Module can define `workflows.yaml`:**

```yaml
---
module: 'bmm'
workflows:
  brainstorming:
    output: 'brainstorming-{project_name}.md'
    next: ['research']
  research:
    output: 'research-{project_name}.md'
    next: ['brief']
  brief:
    output: 'brief-{project_name}.md'
    next: ['prd']
  prd:
    output: 'prd-{project_name}.md'
    next: ['create-ux', 'create-architecture']
  create-ux:
    output: 'ux-design-{project_name}.md'
    next: ['create-architecture']
  create-architecture:
    output: 'architecture-{project_name}.md'
    next: ['create-epics']
  create-epics:
    output: 'epics-{project_name}.md'
    next: ['sprint-planning']
---
```

**Workflows read this to:**
- Know what outputs exist
- Know valid next steps
- Know output filenames

---

## Cross-Module Dependencies

**Workflows can depend on outputs from other modules:**

```yaml
# In BMGD narrative workflow
## INPUT REQUIREMENTS:

### Required:
- {bmm_output_folder}/prd-{project_name}.md
- {bmm_output_folder}/architecture-{project_name}.md

### From BMGD:
- {bmgd_output_folder}/gdd-{project_name}.md (Game Design Document)
```

---

## Validation Checklist

For workflow chaining:
- [ ] Output filename follows convention
- [ ] Frontmatter includes `workflowType`
- [ ] `stepsCompleted` marked complete when done
- [ ] Required inputs clearly defined
- [ ] Input validation with helpful errors
- [ ] Next workflow recommendations in final step
- [ ] Module registry (if using sequence tracking)