Code Migration Planning with Codex: SKILL.md Template
A production playbook for code migration planning in cross-industry operations using Codex: skill.md template, run-scoped inputs, logs, typed results, and artifacts.
Audience: Engineering teams preparing framework or API migrations
The problem
Engineering teams preparing framework or API migrations need code migration planning to run repeatedly against repository snapshots, target docs, and compatibility notes. In cross-industry operations, the pain is not one good answer; it is repeatability, auditability, exception handling, and evidence that survives handoff.
Implementation path
Put the operating procedure in SKILL.md, keep examples beside the skill, attach repository snapshots, target docs, and compatibility notes per run, and let Argo turn the folder into a repeatable Codex execution.
Tradeoffs and failure modes
A skill folder is less flexible than an open chat, but it gives the product a versioned workflow that can be tested and rolled back. For code migration planning, the practical test is whether a second run can be debugged, retried, and consumed by a product without reading the raw agent transcript.
SKILL.md starter
# SKILL.md
You run code migration planning using Codex.
Read only /skill/.argo/inputs.
Write artifacts to /skill/output/artifacts.
Return argo.result.v1 with body.type = "migration_planning".
Run this on Argo