# Cleaned Session Record — Poetry to uv Migration Skill

## Summary

This document is a sanitized summary of the implementation session that turned migration research into a reusable skill, a helper script, and transfer-ready artifacts.

## Starting point

The implementation began from a research document about migrating Poetry-managed Python projects to uv.

The findings that shaped the implementation were:

1. Run a preview before editing files.
2. Keep the current build backend for packaged or higher-risk projects unless a deliberate backend migration is justified.
3. Treat dependency groups and extras as different concepts.
4. Review private source and index mappings manually.
5. Replace operational Poetry usage across docs, CI, Docker, and scripts.
6. Keep Poetry artifacts until parity is demonstrated.

## What was created

### Core skill outputs

- `SKILL.md`
- `README.md`
- `migrate.sh`

### Transfer outputs

- `poetry-to-uv-migration-agent-bundle.json`
- `poetry-to-uv-migration-skill.zip`
- `poetry-to-uv-migration-scripts.zip`

## What changed

### 1. The migration was designed as a staged workflow

The resulting workflow is:

1. Audit the Poetry project.
2. Run a dry-run preview.
3. Apply the migration conservatively.
4. Review the result line by line.
5. Validate runtime, CI, packaging, and publishing behavior.
6. Remove Poetry artifacts only after parity is proven.

### 2. The workflow became executable

The companion script implements:

- `dry-run`
- `apply`
- `rollback`

It standardizes run artifacts under:

```text
.apocrypha/poetry-to-uv/<run-id>/
```

Expected outputs include:

- `before-report.txt`
- `after-report.txt`
- migration command output
- `managed-files.txt`
- `created-files.txt`
- `changes.diff`
- `backup/`

### 3. Rollback and reporting became first-class behavior

The script does more than invoke the migration tool:

- it snapshots managed files before applying changes
- it writes a before report before mutation
- it generates an after report and diff after apply
- it records which files were newly created
- it can restore backups and remove apply-created files during rollback

### 4. The skill was registered for discovery

Workspace discovery docs were updated so the skill is visible alongside the rest of the toolset.

### 5. The skill was packaged for transfer

The transfer bundle includes:

- a JSON manifest with metadata, hashes, entrypoints, and handoff instructions
- a full zip containing the skill directory
- a second zip containing only the script

## Validation performed

The implementation included targeted validation of the created artifacts:

- shell syntax checking for `migrate.sh`
- archive content listing for the zip files
- JSON parse validation of the bundle manifest
- file presence and checksum capture for transferred artifacts

## Sequence of work

### Phase 1 — Research intake

- reviewed the local research source
- extracted migration strategy, command mappings, and pitfalls
- focused on dry-run behavior, rollback, backend strategy, and validation

### Phase 2 — Skill authoring

- created the skill directory
- wrote the skill instructions
- wrote the skill README
- implemented the migration helper script

### Phase 3 — Workspace registration

- added the skill to the instructions registry
- added it to the skills index
- added it to the main workspace README

### Phase 4 — Transfer packaging

- created a full-skill zip
- created a scripts-only zip
- created a JSON handoff manifest

### Phase 5 — Session documentation

- documented the work in a session record
- recorded practical re-entry points for later continuation

## Practical re-entry points

If someone needs to continue this work later, the best starting points are:

1. the cleaned session record
2. the skill instructions
3. the migration script
4. the transfer bundle manifest
5. the cleaned eval handoff

## Outcome

The session produced a reusable Poetry-to-uv migration skill with:

- a documented migration procedure
- dry-run and rollback support
- before and after reporting
- workspace registration
- transfer artifacts for reuse by another agent