Prompt Flow PRS → MAF PRS Pipeline Conversion

Convert an existing Prompt Flow Parallel Run Step (PRS) pipeline submission (one that uses load_component("flow.dag.yaml")) into a PRS pipeline that runs a Microsoft Agent Framework (MAF) workflow as the parallel component.

What load_component(flow.dag.yaml) did automatically — and which pieces this skill produces by hand — is documented in references/pf-vs-maf-prs.md §0.

Triggers

Activate this skill when the user wants to:

• Convert a Prompt Flow PRS pipeline submission to use a MAF workflow instead.
• Run a MAF workflow as a parallel / bulk job on AML compute.
• Replace load_component(flow.dag.yaml) with a hand-built parallel component that wraps a MAF workflow.

Also activate on these PF-user phrasings (people who learned from the run-flow-with-pipeline notebook will describe their need in PF terms):

• "How do I load_component a MAF workflow?" / "load_component('workflow.py') doesn't work — what's the right way?"
• "Give me the MAF equivalent of flow_component = load_component('flow.dag.yaml')."
• "Wrap my MAF workflow as a flow component / parallel component / PF-style component."
• "I want to use my MAF workflow as flow_node in my existing AML pipeline."
• "My pipeline does result_parser_node(pf_output_data=flow_node.outputs.flow_outputs, pf_debug_data=flow_node.outputs.debug_info) — keep that working with MAF."
• "How do I pass connections={...} / ${data.url} column mapping when the step is a MAF workflow instead of a flow?"

In all of these cases the user's mental model is the PF auto-converted flow component with predefined data / flow_outputs / debug_info ports. This skill produces the hand-built MAF equivalent and preserves those names so downstream pipeline DSL, scheduler, and batch-endpoint code copy-paste unchanged.

Do not use this skill to convert the flow.dag.yaml itself — that is the job of promptflow-to-maf. This skill assumes the MAF workflow already exists (or will be produced by promptflow-to-maf) and only deals with the PRS / pipeline plumbing around it.

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Outputs

For an input project containing a MAF workflow (workflow.py exporting create_workflow()) and an existing PF PRS submission script, add the PRS plumbing into the MAF workflow folder itself (default — keeps workflow.py and its deployment package together so customers manage one folder per workflow):

<maf-workflow-folder>/
├── workflow.py               ← existing MAF workflow (untouched)
├── requirements.txt          ← existing (untouched)
├── src/                      ← ADDED: PRS entry + plumbing
│   ├── entry.py              ← thin PRS wrapper: init / run(mini_batch, context) / shutdown
│   ├── hooks.py              ← THE ONLY USER-EDITED FILE: setup / build_workflow_input / serialize_output
│   └── maf_prs/              ← generic plumbing (mirrors promptflow-parallel's processor/executor split)
│       ├── __init__.py
│       ├── config.py         ← argparse → MafPrsConfig
│       ├── executor.py       ← per-row driver; calls into hooks.py
│       └── processor.py      ← mini-batch dispatch, event-loop reuse, finalize
├── component.yaml            ← ADDED: Azure ML parallel component (replaces flow.dag.yaml)
├── env/
│   └── conda.yml             ← ADDED: runtime env (agent-framework + AML PRS deps)
├── submit_pipeline.py        ← ADDED: MLClient + @pipeline DSL submission driver
└── data/sample.jsonl         ← ADDED only when the source `Input(path=...)` is a local file the agent can read; reused verbatim for cloud paths

The original PF flow folder is never modified (it's a separate folder). Existing files in the MAF folder (workflow.py, requirements.txt, tests, …) are also left untouched — only new files are added next to them.

The only file the user normally needs to edit after generation is src/hooks.py — build_workflow_input(row), serialize_output(output), and the optional setup(config) — and even those are auto-filled when the source provides enough information (see auto-derive-checks.md). maf_prs/executor.py and the rest of the package are generic and can be vendored unchanged across all converted workflows.

Alternative: sibling folder layout (opt-in)

If the user explicitly asks to keep the MAF folder pristine (e.g. it is a public doc sample), generate a sibling folder named <maf-workflow-folder>-prs/ instead, and copy workflow.py into it so code: ./ in component.yaml ships it to AML. Trade-off: duplicate workflow.py to keep in sync. Default to the consolidated layout above unless asked.

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Core Rules

1. Read both sides first. Parse the user's PF PRS submission (script or notebook cells) and the MAF workflow (workflow.py, must export create_workflow()). If create_workflow() is missing, route the user to promptflow-to-maf first.
2. Auto-fill only when the source is unambiguous. Run the checks in auto-derive-checks.md and emit generated code only for fields that pass. For everything else leave a # TODO stub that quotes the original PF source and the missing piece — never invent endpoint URLs, data paths, or untyped handler inputs.
3. One workflow instance per row. MAF workflows do not support concurrent run() on the same instance. The template executor.execute(...) builds a fresh workflow per row from the cached _create_workflow factory; do not "optimise" by caching an instance.
4. One asyncio loop per worker. processor.init() creates the loop; process() reuses it via run_until_complete; finalize() closes it. Do not call asyncio.run() per row — it leaks Azure SDK transports.
5. Preserve PRS contract. entry.py exposes exactly three top-level functions: init(), run(mini_batch, context), shutdown(). context.global_row_index_lower_bound is required to stamp a stable line_number on each result; downstream PF eval tooling joins inputs to outputs by it.
6. Mirror PRS run settings 1:1. Every PF PRS knob has an exact AML parallel-component equivalent; carry values across unchanged unless the user asks otherwise. See pf-vs-maf-prs.md §4 for the table.
7. connections= → component inputs + Managed Identity. Surface endpoint URL / deployment / API version as component inputs:, pass them via program_arguments. Prefer Managed Identity + Key Vault for secrets; never hard-code keys in component.yaml.
8. Generated project must be self-contained. Whether using the default consolidated layout (PRS files added to the MAF folder) or the sibling-folder layout, no path should refer back to the original PF flow folder. Copy data samples, prompt files, and any user packages the workflow imports. In sibling-folder mode, also copy so AML's snapshot ships it.

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Workflow

A single five-step loop. Each step combines the decision (what to ask / what to print to the user) with the action (what to write).

1. Ask

Use vscode_askQuestions for any of the following that are not obvious from the workspace:

• Path to the existing PF PRS submission (script or notebook cell).
• Path to the MAF workflow (workflow.py with create_workflow()).
• Whether the workflow has been migrated yet — if not, route to promptflow-to-maf first.

2. Audit

Extract the PRS settings from the source script using the table in pf-vs-maf-prs.md §4 (compute, mini_batch_size, retry_settings, etc.) and show the populated table to the user before continuing.

3. Decide (Phase 1.5)

Run the checks in auto-derive-checks.md (A–J) and print the verdict table showing which fields will be auto-filled vs. left as TODO. The same table doubles as the change log handed to the user in step 5.

4. Generate

Add assets/ files into the MAF workflow folder (default) or into a new sibling <maf-workflow-folder>-prs/ (only if the user opted in). Do not overwrite any pre-existing file in the MAF folder; if a file name already exists (e.g. submit_pipeline.py), confirm with the user before overwriting.

File(s)	Action
src/entry.py	Copy verbatim. Do not edit.
src/maf_prs/{__init__,config,processor,executor}.py	Copy verbatim. Do not edit unless the workflow needs an extra component input (then add a flag in config.parse_args and surface it in component.yaml).
src/hooks.py	Apply auto-derived bodies for build_workflow_input / serialize_output per the verdict table; insert TODO stubs (template in auto-derive-checks.md) where checks failed. If component inputs need to be turned into env vars / file paths before the workflow imports, fill the setup(config) body too. Add the matching from workflow import ... line at the top.
component.yaml	Fill inputs: from check F; fill PRS settings from the audit table; set program_arguments to forward inputs + --output_dir ${{outputs.debug_info}}. Use code: ./ and entry_script: src/entry.py so workflow.py (sibling of src/) is shipped to AML. Set data input type: uri_file and always include the PF compatibility flag set in program_arguments (--amlbi_pf_enabled True --amlbi_pf_run_mode component --amlbi_file_format jsonl --amlbi_mini_batch_rows 1) — PRS rejects bare uri_file without these flags (gotcha #12). Wrap every optional: true input in $[[--flag ${{inputs.X}}]] in program_arguments — bare ${{inputs.X}} for an optional input fails registration with Optional input X must be placed in nested argument: $[[]] (gotcha #15). Do not add --pf_input_* flags.
env/conda.yml	Add any extra pip packages imported by the workflow, always with a lower-bound version pin (package>=X.Y.Z) — bare entries trigger error: resolution-too-deep on the AML image build host and the job never reaches init() (gotcha #14). Keep the existing PRS runtime pins as-is.

5. Validate & hand off

If no input-side TODO remains and a local jsonl file is available (either copied as data/sample.jsonl or already pointed at by the source Input(path=...)), run the local dry-run from the target folder:

cd <maf-workflow-folder>   # or <maf-workflow-folder>-prs in sibling mode
python -c "
import pandas as pd
from types import SimpleNamespace
import sys; sys.path.insert(0, 'src')
from entry import init, run, shutdown
init()
ctx = SimpleNamespace(minibatch_index=0, global_row_index_lower_bound=0)
print(run(pd.read_json('<path-to-local-jsonl>', lines=True), ctx))
shutdown()
"

If the source Input(path=...) is a remote URI (datastore / data asset) and no local sample exists, skip the dry-run and tell the user the project will be exercised on the first AML submission instead.

If TODOs remain, skip the dry-run and tell the user which file to edit first. If the dry-run fails, consult references/gotchas.md, fix, retry.

Hand off python submit_pipeline.py with: the verdict table from step 3, the exact command to run, and a one-line description of what to look for in the streamed log (one JSONL row per input row in outputs.flow_outputs/parallel_run_step.jsonl).

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Related Skills

• promptflow-to-maf — convert the flow itself (run before this skill if not already done).
• maf-online-endpoint — online (real-time) deployment of a MAF workflow. Use for request/response semantics rather than batch.
• maf-tracing — enable Application Insights tracing (maf_prs/executor.py::_setup_tracing already wires it up when APPLICATIONINSIGHTS_CONNECTION_STRING is set).

References

• pf-vs-maf-prs.md — side-by-side mapping (PF auto-component → MAF hand-built) + PRS run-settings table.
• auto-derive-checks.md — the 10 Phase 1.5 checks (A–J) + TODO stub template + verdict table format.
• gotchas.md — async loop reuse, mini-batch retry semantics, MSI / connection mapping, common dry-run failures.