apphost.addon.media.contract

Supported upload/download path for Buzz attachments on a claimed site: durable MinIO PVC, Buzz /media with NIP-42, not shared document workflows. No kubeconfig. No secrets.

Overview

Property	Value
Workflow type	Dag
Library	App-apphost
Version	1.0

Input Schema

Field	Type	Required	Default	Description
site_uuid	uuid	Yes	—	—
addon	string	No	buzz	—

Output Schema

Field	Type	Required	Default	Description
site_uuid	uuid	No	—	—
addon	string	No	—	—
resolve	json	No	—	—
contract	json	No	—	—
ack	json	No	—	—
failure_reason	string	No	—	Engine-stamped failure reason
failure_type	string	No	—	Stable failure classification
failed_action	string	No	—	Action that failed
failed_at_state	string	No	—	State when the workflow failed
failed_step	json	No	—	Failed DAG step envelope
failed_layer	json	No	—	Failed DAG layer envelope
error	string	No	—	Engine-stamped exception message
error_type	string	No	—	Engine-stamped exception class name
compensation_trigger	json	No	—	—
comp_queue	json	No	—	—
comp_current_layer	json	No	—	—
comp_retry_count	json	No	—	—

DAG Layers

#	Layer	Steps	Compensation
1	resolve	apphost.addon.resolve	apphost.web.ack
2	describe	apphost.addon.media.contract-describe	—

Execution Flow

Compensation

When any layer fails, its compensation steps run in reverse order to roll back the work completed so far.

Sub-workflows

Sub-workflow	Step name
apphost.addon.resolve	resolve
apphost.addon.media.contract-describe	contract
apphost.web.ack	ack

Outcomes

Outcome	Type	Description	State Data Keys
read	SUCCESS	Media contract returned	media_url
failed	FAILURE	Apphost workflow failed	failure_reason

API Usage

POST /api/workflows/start
Content-Type: application/json

{
  "workflow_type": "apphost.addon.media.contract",
  "initial_data": {
    "site_uuid": "value"
  }
}