Small utilities to work with jj and Claude Code. See: https://bsky.app/profile/ernesto-jimenez.com/post/3m44izya6ac2n

claude.toml

"$schema" = "https://jj-vcs.github.io/jj/latest/config-schema.json"

[aliases]
clstart = ["util", "exec", "--", "bash", "-c", """
  set -euo pipefail
  # Require exactly one argument
  if [ "$#" -ne 1 ]; then
    echo "Error: You must name the workspace."
    exit 1
  fi
  workspace="${1//[^a-zA-Z0-9]/-}"
  source="$(jj workspace root | sed -e 's/-workspaces\\/.*//')"
  mkdir -p "$source-workspaces"
  target="$source-workspaces/$workspace"
  # If workspace doesn't exist, create it
  if [ ! -d "$target" ]; then
    echo "Creating workspace '$target'"
    jj workspace add "$target"
  fi

  session=$(basename $target)
  # If tmux session doesn't exist, create it
  if ! tmux has-session -t "$session" 2>/dev/null; then
    # Create a new detached session
    echo "Creating tmux session '$session'"
    tmux new-session -c "$target" -d -s "$session"
    echo "Session '$session' created."
    # If .jj-workspace-setup.sh exists in $source, run it
    if [ -f "$source/.jj-workspace-setup.sh" ]; then
      echo "Configuring session."
      $source/.jj-workspace-setup.sh "$target"
    fi
  else
    echo "Session '$session' already exists."
  fi

  if [ -z "$TMUX" ]; then
    tmux attach -t "=$session"
  else
    tmux switch-client -t "=$session"
  fi
""", ""]
clstop = ["util", "exec", "--", "bash", "-c", """
  set -euo pipefail
  # Require exactly one argument
  if [ "$#" -ne 1 ]; then
    echo "Error: You must name the workspace."
    exit 1
  fi
  workspace="${1//[^a-zA-Z0-9]/-}"
  source="$(jj workspace root | sed -e 's/-workspaces\\/.*//')"
  target="$workspace"
  name=$(basename "$target")

  jj workspace forget "$name" || true
  rm -rf "$source-workspaces/$target"
  if tmux has-session -t "$name" 2>/dev/null; then
    tmux kill-session -t "$name"
    echo "Session '$name' stopped."
  else
    echo "Session '$name' does not exist."
  fi
""", ""]
clresolve = [
  "util",
  "exec",
  "--",
  "bash",
  "-c",
  """
  set -euo pipefail
  revision=${1:-@-}
  if [ "$#" -eq 1 ]; then
    jj new $revision
  fi
  echo "Resolving conflicts in $revision"
  claude --permission-mode=plan "resolve conflicts in $(jj resolve -r @- --list | awk '{print "@"$1}' | paste -sd' ' -). You can look for recent changes to the conflicted files with 'jj log -r \\"latest(..@ & files({file}))\\" -s' and check the actual changes with 'jj show {change_id}'"
""",
  "",
]
claude-checkpoint = ["util", "exec", "--", "bash", "-c", """
  set -euo pipefail
  is_empty=$(jj show @ -T 'self.empty()' --no-pager)
  if [ "$is_empty" = "true" ]; then
    echo "No changes to checkpoint."
    exit 0
  fi
  jj new
  author="$1"
  # if author is set, describe the previous commit with the author
  if [ -n "$author" ]; then
    jj describe -r @- -m "$author"
  fi
""", ""]

gistfile1.txt

{
  "$schema": "https://json.schemastore.org/claude-code-settings.json",
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Task",
        "hooks": [
          {
            "type": "command",
            "command": "jj claude-checkpoint || true"
          }
        ]
      }
    ],
    "PostToolUse": [
      {
        "matcher": "Task",
        "hooks": [
          {
            "type": "command",
            "command": "jj claude-checkpoint 'claude@tessl.io' >> /tmp/claude-checkpoint.log 2>&1 || true"
          }
        ]
      }
    ],
    "Stop": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "jj claude-checkpoint 'Claude <claude@tessl.io>' >> /tmp/claude-checkpoint.log 2>&1 || true"
          }
        ]
      }
    ],
    "Notification": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "jq -r .message | say"
          }
        ]
      },
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "jq -r .message | terminal-notifier -title 'Claude Code needs you' -sender com.anthropic.claudefordesktop"
          }
        ]
      }
    ]
  }
}