# Migration

## Goal

Move the current cost-of-substitution implementation into `renunney` in staged,
low-risk steps.

## Current State

Operational code still lives in:

- [`../../collaborations/to_ptbc/evc/cost_of_substitution`](/mnt/CIFS/pengolodh/Docs/Projects/collaborations/to_ptbc/evc/cost_of_substitution)

`renunney` currently acts as:

- a clean git repository,
- a run-control wrapper,
- a stable place for deployment and orchestration commands,
- the eventual destination for migrated code.

## Recommended Migration Order

1. Orchestration control plane has been migrated locally:
   - `src/renunney/orchestration.py`
   - `scripts/run_orchestration.py`
2. Keep the Track 1 simulation backend in the legacy path until real multi-host runs are stable.
3. Migrate Track 1 runner and API next:
   - `python/run_track1.py`
   - `python/track1_api.py`
4. Migrate the Track 1 simulation core after the runner path is stable:
   - `python/track1_reference.py`
   - `python/track1_threshold.py`
   - `python/track1_analysis.py`
5. Migrate docs and example configs last, after path references are updated.

## Constraint

Do not break the ability to run current Figure 1 jobs while migrating code.