ralph-start

ralph-start

Start Ralph's autonomous iteration loop.

What This Skill Does

This skill starts Ralph's autonomous loop that repeatedly spawns the ralph-worker agent to implement tasks from fix_plan.md. The loop continues until all tasks are complete, a blocker is encountered, or the user stops it.

Prerequisites

• Ralph must be initialized (/ralph:init has been run)
• docs/ai/ralph/PROMPT.md must exist
• docs/ai/ralph/fix_plan.md must exist
• docs/ai/ralph/status.json must exist

Implementation

When this skill is invoked:

1. Validate Prerequisites

Check that all required files exist before starting:

# Check for required files
if [[ ! -f docs/ai/ralph/PROMPT.md ]]; then
  echo "Error: PROMPT.md not found. Run /ralph:init first."
  exit 1
fi

if [[ ! -f docs/ai/ralph/fix_plan.md ]]; then
  echo "Error: fix_plan.md not found. Run /ralph:init first."
  exit 1
fi

if [[ ! -f docs/ai/ralph/status.json ]]; then
  echo "Error: status.json not found. Run /ralph:init first."
  exit 1
fi

2. Clear Stop Signal (if present)

Remove any existing stop signal from a previous run:

# Remove stop signal if it exists
rm -f docs/ai/ralph/.ralph_stop

3. Update status.json to 'running' and record base commit

Mark Ralph as running, record the start time, and save the current HEAD as the base commit for squashing on completion:

# Update status.json with started_at timestamp, running status, and base commit
jq --arg bc "$(git rev-parse HEAD)" \
   '.status = "running" | .started_at = now | .last_updated = now | .base_commit = $bc' \
   docs/ai/ralph/status.json > /tmp/status.json.tmp
mv /tmp/status.json.tmp docs/ai/ralph/status.json

echo "Ralph started. Beginning autonomous iteration loop..."
echo "Base commit recorded: $(git rev-parse --short HEAD)"

The base_commit is the anchor point used to squash all of Ralph's commits into one when all tasks complete. It is only set once per /ralph:start invocation — if the loop is stopped and restarted, a new base commit is recorded.

4. Enter Main Loop

The loop repeatedly spawns ralph-worker and checks for completion:

# Main iteration loop
while true; do
  # Check for stop signal before each iteration
  if [[ -f docs/ai/ralph/.ralph_stop ]]; then
    echo ""
    echo "Stop signal detected. Exiting loop gracefully."
    rm -f docs/ai/ralph/.ralph_stop

    # Update status to stopped
    jq '.status = "stopped" | .last_updated = now | .stopped_at = now' \
      docs/ai/ralph/status.json > /tmp/status.json.tmp
    mv /tmp/status.json.tmp docs/ai/ralph/status.json

    echo "Ralph stopped after iteration $(jq -r '.iteration_count' docs/ai/ralph/status.json)."
    break
  fi

  # Get current iteration count
  ITERATION=$(jq -r '.iteration_count' docs/ai/ralph/status.json)
  NEXT_ITERATION=$((ITERATION + 1))

  echo ""
  echo "========================================="
  echo "Starting iteration $NEXT_ITERATION"
  echo "========================================="

  # Spawn ralph-worker using Task tool
  # Use subagent_type="ralph-worker" to invoke the agent
  # The worker will read context, pick a task, implement it, and return a summary

  # After spawning Task(ralph-worker), the result will be displayed in chat
  # The worker handles incrementing iteration_count in status.json

  # Check for user confirmation every 10 iterations
  if (( NEXT_ITERATION % 10 == 0 )); then
    # Use AskUserQuestion to prompt for continuation
    # Question: "Completed 10 iterations. Continue with more iterations? (yes/no)"
    # If response is not "yes", break the loop
  fi

  # After worker returns, check fix_plan.md for completion signals
  if grep -q "^RALPH_COMPLETE" docs/ai/ralph/fix_plan.md 2>/dev/null; then
    echo ""
    echo "RALPH_COMPLETE signal detected. All tasks complete!"

    FINAL_ITERATION=$(jq -r '.iteration_count' docs/ai/ralph/status.json)

    # --- Squash all Ralph commits into one ---
    BASE_COMMIT=$(jq -r '.base_commit // empty' docs/ai/ralph/status.json)

    if [[ -z "$BASE_COMMIT" ]]; then
      echo ""
      echo "WARNING: No base_commit found in status.json. Cannot squash automatically."
      # Use AskUserQuestion to ask:
      #   "No base commit was recorded. Provide a commit hash to squash from, or choose 'Skip squash'."
      # If user provides a hash, use it as BASE_COMMIT.
      # If user chooses "Skip squash", skip the squash step.
    else
      echo "Squashing commits from base $BASE_COMMIT to HEAD..."

      # Derive a commit message from the first heading in fix_plan.md, or fall back to generic
      PLAN_TITLE=$(head -5 docs/ai/ralph/fix_plan.md | grep "^#" | head -1 | sed 's/^#\+ *//')
      if [[ -z "$PLAN_TITLE" ]]; then
        PLAN_TITLE="Ralph autonomous implementation"
      fi

      git reset --soft "$BASE_COMMIT"
      git add .
      git commit -m "feat: ${PLAN_TITLE}

Squashed from ${FINAL_ITERATION} Ralph iterations.

Co-Authored-By: Ralph Wiggum <ralph@claude-code>"

      echo "All commits squashed into one: $(git rev-parse --short HEAD)"
    fi

    # Update status to complete
    jq '.status = "complete" | .last_updated = now | .completed_at = now' \
      docs/ai/ralph/status.json > /tmp/status.json.tmp
    mv /tmp/status.json.tmp docs/ai/ralph/status.json

    # Report summary
    echo ""
    echo "Ralph completed successfully!"
    echo "- Total iterations: $FINAL_ITERATION"
    echo "- Status: complete"
    echo "- All tasks in fix_plan.md have been completed."
    echo "- All commits squashed into a single commit."
    break
  fi

  if grep -q "^RALPH_BLOCKED" docs/ai/ralph/fix_plan.md 2>/dev/null; then
    echo ""
    echo "RALPH_BLOCKED signal detected. Cannot continue."

    # Extract blocker reason
    BLOCKER=$(grep "^RALPH_BLOCKED" docs/ai/ralph/fix_plan.md | head -1)

    # Update status to blocked
    jq '.status = "blocked" | .last_updated = now | .blocked_at = now' \
      docs/ai/ralph/status.json > /tmp/status.json.tmp
    mv /tmp/status.json.tmp docs/ai/ralph/status.json

    # Report summary
    FINAL_ITERATION=$(jq -r '.iteration_count' docs/ai/ralph/status.json)
    echo ""
    echo "Ralph blocked after $FINAL_ITERATION iterations."
    echo "- Status: blocked"
    echo "- Reason: $BLOCKER"
    echo ""
    echo "Review fix_plan.md to resolve the blocker, then run /ralph:start again."
    break
  fi
done

5. Orchestration Details

Loop structure:

• Check for .ralph_stop before each iteration
• Spawn ralph-worker via Task tool with subagent_type="ralph-worker"
• Display worker's iteration summary in chat
• Check fix_plan.md for RALPH_COMPLETE or RALPH_BLOCKED signals
• Prompt user every 10 iterations for confirmation
• Continue until completion signal, blocker, stop signal, or user declines

Iteration counting:

• The ralph-worker agent is responsible for incrementing iteration_count in status.json
• The ralph-start skill reads the current count before spawning each worker
• This ensures accurate tracking even if the loop is stopped and restarted

User confirmation:

• Every 10 iterations, use AskUserQuestion to ask: "Completed 10 iterations. Continue? (yes/no)"
• Only continue if user responds "yes"
• This prevents runaway loops and gives user control points

Completion signals:

• RALPH_COMPLETE at top of fix_plan.md = all tasks done successfully → triggers commit squash
• RALPH_BLOCKED: [reason] = cannot proceed, need user intervention
• Empty fix_plan.md Tasks section = treated same as RALPH_COMPLETE

Commit squashing:

• On RALPH_COMPLETE, all commits since base_commit (recorded in status.json at start) are squashed into a single commit via git reset --soft <base_commit> && git add . && git commit
• If base_commit is missing from status.json (e.g., older runs), the user is prompted via AskUserQuestion to provide a hash or skip the squash
• The squash commit message is derived from the first heading in fix_plan.md

Coordination with /ralph:stop

The /ralph:stop skill creates a .ralph_stop signal file. This loop checks for that file before each iteration:

• If found, the loop exits gracefully
• The current iteration completes normally before checking
• The signal file is removed after detection
• Status is updated to 'stopped'

Example Session Flow

User: /ralph:start

Ralph started. Beginning autonomous iteration loop...
Base commit recorded: a1b2c3d

=========================================
Starting iteration 1
=========================================
[ralph-worker spawns and returns summary]
Iteration 1: Implemented task "Add user authentication"
- Files changed: auth.ts, login.tsx
- Tests: pass
- Next: Add password reset flow

=========================================
Starting iteration 2
=========================================
[ralph-worker spawns and returns summary]
Iteration 2: Implemented task "Add password reset flow"
- Files changed: reset-password.tsx, email-service.ts
- Tests: pass
- Next: RALPH_COMPLETE

RALPH_COMPLETE signal detected. All tasks complete!
Squashing commits from base a1b2c3d to HEAD...
All commits squashed into one: f4e5d6c

Ralph completed successfully!
- Total iterations: 2
- Status: complete
- All tasks in fix_plan.md have been completed.
- All commits squashed into a single commit.

Important Notes

• Fresh context: Each ralph-worker starts with zero memory and reads all context from files
• Atomic updates: Use jq with temp files for atomic JSON updates to avoid corruption
• Graceful exit: Always allow current iteration to finish before stopping
• Progress display: Each iteration's summary is displayed in chat for user visibility
• Resumable: If stopped, /ralph:start can resume from current state (clears stop signal and continues)