Jean2 integration

Jean2 support is beta.

tokenjuice install jean2 inserts a marker-delimited instruction block into the current workspace AGENTS.md. Jean2 documents {workspace}/AGENTS.md as always-on project instructions, so tokenjuice uses that project instruction surface instead of claiming command-output interception.

tokenjuice install jean2
tokenjuice doctor jean2
tokenjuice uninstall jean2

By default, tokenjuice writes AGENTS.md in the nearest git root, falling back to the current working directory when no git root exists. Set JEAN2_PROJECT_DIR=/path/to/workspace to target a workspace explicitly from scripts.

The installed block tells Jean2 to use tokenjuice wrap -- <command> for terminal commands likely to produce long output, and to use tokenjuice wrap --raw -- <command> only when raw bytes are required.

Existing AGENTS.md content is backed up before install and preserved outside the managed tokenjuice block. Uninstall removes only the tokenjuice block.

doctor jean2 reports ok when the AGENTS.md block exists, includes tokenjuice wrap guidance, includes the raw escape hatch, and does not suggest the full-output escape hatch.

This integration is guidance-only. Jean2 can read project instructions, but those instructions do not replace terminal command output.