This PR has two critical logic issues/anti-patterns that need to be addressed:

1. Global side-effect of modifying info/exclude

In scripts/wtcraft cmd_new, there is a block that modifies info/exclude:

  local exclude_file
  exclude_file="$(git -C "$wt_path" rev-parse --git-path info/exclude)"

Issue: Git Worktrees share the same core .git directory structure. The path returned for info/exclude is actually the main repository's global .git/info/exclude.

• When appending /.worktree-task.md, it not only ignores the file in the newly created worktree, but also globally ignores it in the main repository root and all other worktrees.
• info/exclude is local and unversioned. If other developers git clone the project, Git will still track these files until they run wtcraft new for the first time, causing inconsistent environments across the team.
  Recommendation: Remove this "magic" code that mutates Git's local config. If the goal is to ignore .worktree-task.md, explicitly add it to the project's version-controlled .gitignore (or have wtcraft init append it to the user's .gitignore).

2. Broken workflow between /planwt and wtcraft new (Data Loss)

The README updates the workflow to expect /planwt to do both steps:
/planwt add oauth login flow # 1. plan task + create worktree

Issue: Under the current code, this triggers a severe bug:

• According to templates/.claude/commands/planwt.md, the Agent will first write the planned .worktree-task.md into the repo root.
• Then it executes wtcraft new <branch>.
• However, cmd_new currently unconditionally overwrites the file with a blank template:

  local task_file="${wt_path}/.worktree-task.md"
  cp "${TEMPLATE_DIR}/worktrees/.worktree-task.md" "$task_file"

Consequence: The rich plan Claude generated is left abandoned in the repo root, while the newly created worktree gets a blank template!

🛠️ Suggested Fixes

1. Remove the info/exclude mutation logic entirely.
2. Update the task generation logic in scripts/wtcraft to "absorb" the existing plan if it was generated in the repo root:

  local task_file="${wt_path}/.worktree-task.md"
  
  if [ -f "${repo_root}/.worktree-task.md" ]; then
    mv "${repo_root}/.worktree-task.md" "$task_file"
  else
    cp "${TEMPLATE_DIR}/worktrees/.worktree-task.md" "$task_file"
  fi