Source Code Management

Recovery: Any past state is one jj edit away
Confidence: Experiment freely knowing nothing is lost
Squash merge: All commits collapse to one clean commit at release

jj workflow for preserving all work. Nothing is ever lost.

Core Principle

Every change is automatically tracked. In jj, working copy (@) is always a commit. No staging area. Every save is part of the current commit.

Commit after every testable change - After each TDD cycle, run jj commit -m "msg". Don't batch. Worktree gets squash-merged anyway.
Finalize before destructive ops - Before jj restore, jj abandon, or ending session: commit first.
Experiments: commit, try, backout - Commit the experiment, evaluate, then jj backout -r @- if discarding. History preserved.
Unknown changes: preserve first - Never jj restore unknown changes. Commit checkpoint, then investigate with jj diff -r @-.
Deleting code: commit, then delete - Checkpoint before removing so you can recover from history.

Don't	Do Instead
`jj restore` without thinking	Commit first
`jj abandon` without checking	Verify commit is unwanted
Batch changes in one commit	Commit after each testable change
Leave session without finalizing	Commit before stopping