Megatron Migration Generator

Megatron Migration Generator

Generate implementation-oriented migration artifacts for MindSpeed only after upstream change analysis and impact mapping have narrowed the work to a high-confidence set of items. The goal is to port the upstream feature into MindSpeed with the upstream commit as the primary reference, not to emit a tiny patch hint.

Default Output Mode

Default to report + patch, and generate the final markdown deliverable in Chinese unless the user explicitly requests another locale.

Do not default to direct code edits or automatic commits. Default to an implementation-first package, not a minimal patch sketch.

Supported Modes

1. report Produce a migration report only.
2. patch Produce a migration report plus a full implementation reference package. Default to per-feature folders containing full.patch, split patches/, upstream reference metadata, implementation checklists, and explicit uncovered scope.
3. apply Edit the local workspace without creating a commit. Use only when alignment and impact confidence are high.
4. commit Reserve for explicit user requests after patch review. Do not use as the first-pass default.

Entry Conditions

Proceed only when all of the following are true:

• MindSpeed branch is known.
• Megatron base branch is known.
• Megatron target branch or change-set is known.
• Relevant impact items already exist.
• Each migration-worthy item includes upstream commit references and enough implementation scope to tell config/runtime/wrapper/test work apart.

If any of these are missing, stop and ask for or derive the missing prerequisite instead of guessing.

Workflow

1. Read the impact report.
2. Separate high-confidence items from speculative items.
3. For each high-confidence item, describe: the upstream event, the upstream commit and changed files, the upstream implementation units, the local adaptation target, the intended code change, the uncertainty.
4. Generate: one integrated migration_report.md impact_report.json if needed for carry-forward candidate_patch.md as a compact summary index a features/ directory with one subfolder per migration item, each containing: full.patch for the full local implementation draft patches/ for split patch series organized by implementation unit candidate.patch as the compatibility entry patch README.md, checklist.md, package_manifest.json, and upstream_reference.json
5. If in apply mode, edit only the approved files and leave a clear explanation of what changed.

Safety Rules

• Never generate migration code directly from raw commit history without an impact report.
• Avoid direct edits in exploration mode.
• When the target is megatron main, frame code output as a candidate adaptation draft, not a compatibility-guaranteed migration.
• Prefer patch artifacts over commits because they are easier to review and safer when branch alignment is still evolving.
• Do not treat one local file edit as a complete feature migration when the upstream commit spans config, runtime logic, wrappers, and tests.
• When a full migration package cannot be completed from the available inputs, explicitly record uncovered implementation units, omitted scope, and manual follow-ups instead of pretending the feature is complete.

Static Validation

Keep validation lightweight and local:

• patch applies cleanly
• paths exist
• names and arguments match local code structure
• basic syntax or lint-level checks when available
• the package explains which upstream implementation units are already ported and which remain to be ported

Do not imply that training correctness, performance, or numerical accuracy has been verified.

References

• Read migration-modes.md before choosing the output form.
• Read implementation-first-package.md before generating a migration package that claims to represent a feature implementation.
• Read report-template.md for the expected integrated markdown deliverable structure. Default to Chinese report language.
• Run synthesize_full_patch_series.py after impact mapping when you want known feature commits to expand into fuller multi-file patch series instead of staying as single-file placeholders.
• Run render_migration_artifacts.py to turn an impact_report.json into reviewable report and patch-plan artifacts before any manual refinement.