clip/hook-overlay

Hook Text Overlays — AI-generated attention-grabbing text burned into clips.

Category: clip
Source: workflows/clip/hooks.py

Input Schema

Field	Type	Default	Description
full_text	string	""
hook	string	""
hook_style	string	"bold and provocative"
media_path	string	""
regenerate	object	—	When set, this run is a regeneration. Workflows may read direction / keep / extra_instructions to modulate prompts; the engine persists parent_run_id and parent_variant_index as run lineage columns.
subtitled_path	object	—
variants	integer	1	Number of independent variant executions (1–10). When > 1, the engine runs the workflow N times with different sampling, producing N outputs.
vertical_path	object	—

Output Schema

No schema defined.

Task Pipeline

generate_hook_text → burn_hook_overlay

Task	Description
generate_hook_text	Generate hook text for a clip using an LLM.
burn_hook_overlay	Burn hook text overlay onto the first 3 seconds of the video.

Run-spec example

Save the YAML below as my-run.yaml, edit the values, and run with the CLI or POST it to the API. Required fields are uncommented; optional knobs are documented above the input: block — copy any line under input: and uncomment to set.

workflow: clip/hook-overlay

# Optional fields — copy any line(s) under `input:` and uncomment to set:
#   full_text: ""
#
#   hook: ""
#
#   hook_style: bold and provocative
#
#   media_path: ""
#
#   subtitled_path: null
#
#   vertical_path: null
#

input: {}

Run it locally:

fab-workflow --from-file my-run.yaml

Or submit over the wire — the same file is the request body:

curl -X POST 'https://gofabric.dev/v1/workflows/runs?name=clip/hook-overlay' \
  -H 'Authorization: Bearer fab_xxx' \
  -H 'content-type: application/yaml' \
  --data-binary @my-run.yaml

Every workflow also accepts the universal WorkflowInput fields — variants (1–10 fan-out) and regenerate (creative-direction hints with run lineage). See Run-specs (YAML / TOML / JSON) for the full top-level shape (metadata, priority, bundle, parent, etc.).

Warnings

• Last user task burn_hook_overlay has no Pydantic return type — workflow output schema is null. Declare a WorkflowOutput subclass and pass it to Flow(output=…) for a strict contract.