TENET — Documentation

One-command migration from the older JFL naming to TENET. Renames directories, updates configs, scripts.

tenet migrate                  # .jfl/ → .tenet/, update all configs
tenet migrate --dry-run        # preview changes without applying
tenet migrate --rollback       # undo migration

What it updates:

.jfl/ directory → .tenet/
JFL_* env var references → TENET_*
.mcp.json server names
.claude/settings.json hooks
.gitignore entries
Script references

The jfl command and JFL_* env vars continue to work after migration — no rush.