Turnip Prophet

Turnip Prophet - Animal Crossing Turnip Price Predictor

Predicts Animal Crossing: New Horizons turnip prices using the game's actual algorithm.

⚠️ IMPORTANT: Always Read Memory First!

Before doing ANYTHING, read the weekly data file:

memory/turnip-week.json

This contains the buy price, previous pattern, and all known prices for the current week. Do not ask the user for data you already have. Only ask for new/missing prices.

When the user gives a new price, update memory/turnip-week.json immediately with the new value before running the prediction.

Weekly Data Format (memory/turnip-week.json)

{
  "week_start": "2026-02-15",
  "buy_price": 96,
  "previous_pattern": 1,
  "prices": [84, 81, 78, null, null, null, null, null, null, null, null, null],
  "labels": ["Mon AM", "Mon PM", "Tue AM", "Tue PM", "Wed AM", "Wed PM", "Thu AM", "Thu PM", "Fri AM", "Fri PM", "Sat AM", "Sat PM"]
}

On Sundays, create a fresh file with the new buy price and reset prices to all nulls.

Triggers

Activate when user mentions:

• "turnip prices" or "turnip price"
• "ACNH turnips" or "Animal Crossing turnips"
• "stalk market"
• "turnip prophet" or "turnip prediction"
• "bell profit" with context of turnips
• Any question about when to sell turnips in Animal Crossing

Privacy & Data Storage

This skill stores local configuration data only on your machine in memory/turnip-config.json. No data is sent to external servers.

What gets stored (if you enable reminders):

• Channel name (telegram/whatsapp/discord/signal)
• Your user ID on that channel
• OpenClaw binary path
• Setup timestamp

Why: These values are needed so the cron reminders can send messages to the correct place without hard-coded values.

Where: Stored locally in the skill's memory directory on your OpenClaw instance. Not shared, not uploaded, not visible to anyone else.

How to disable/reset:

rm ~/.openclaw/workspace/skills/turnip-prophet/memory/turnip-config.json

Removing cron entries:

# Edit crontab and remove the turnip-prophet lines
crontab -e

Important: You must explicitly confirm the setup flow before any config is saved. Declining the setup offer means nothing is stored.

Credentials & Permissions

The skill itself does not request or store any API keys or credentials.

However, if you enable cron reminders, the installed cron jobs will:

• Use your local openclaw CLI binary
• Send messages using your existing OpenClaw configuration and credentials
• Operate with whatever permissions your OpenClaw instance has

What this means:

• Automated reminders will be sent as you, using your OpenClaw identity
• The cron jobs require OpenClaw to be running and properly configured
• Messages are sent through your configured channels (Telegram/WhatsApp/etc.) using your bot tokens or API credentials

You are granting permission for:

• Automated message sending on your behalf
• Using your existing messaging channel credentials
• Running scheduled tasks that invoke openclaw gateway call message.send

If you're uncomfortable with automated messaging using your credentials, do not enable the cron reminders. The core prediction feature works fine without them.

Daily Reminders (Optional)

On first use, offer to set up daily reminders with an interactive flow:

Interactive Setup Flow (Agent Instructions)

On first trigger (when user asks about turnips for the first time):

1. Check if already configured:

   test -f memory/turnip-config.json && echo "configured" || echo "not configured"
   

2. If NOT configured, offer setup:

   "Want daily turnip reminders? I can ping you: • Sunday 8am: Check Daisy Mae's price • Mon-Sat noon + 8pm: Check Nook's prices
   • Saturday 9:45pm: Final warning

   Reply 'yes' to set up, or 'no' to skip."

3. If user says yes, auto-detect config:

   • Channel: Extract from inbound context JSON "channel" field (telegram/whatsapp/discord/signal)
   • Target ID: Extract from inbound context JSON "sender_id" field
   • OpenClaw path: Run which openclaw or use /usr/local/bin/openclaw
   • Skill dir: Use the absolute path to this skill's directory

4. If auto-detection fails:

   • Ask user for missing values explicitly
   • Validate before proceeding

Store config in memory/turnip-config.json:

{
  "channel": "telegram",
  "target": "8577655544",
  "openclaw_bin": "/usr/local/bin/openclaw",
  "skill_dir": "/home/user/.openclaw/workspace/skills/turnip-prophet",
  "configured_at": "2026-02-23T10:30:00Z"
}

Generate and show cron entries: Show the user exactly what will be added, with their specific values. Example:

# Turnip Prophet reminders for telegram:8577655544
0 8 * * 0 /usr/local/bin/openclaw gateway call message.send --params '{"channel":"telegram","target":"8577655544","message":"🔔 Sunday! Check Daisy Mae'''s turnip price (90-110 bells) and buy your turnips 🥬"}' 2>&1 | logger -t turnip-prophet
0 12 * * 1-6 /usr/local/bin/openclaw gateway call message.send --params '{"channel":"telegram","target":"8577655544","message":"🔔 Time to check Nook'''s Cranny turnip prices!"}' 2>&1 | logger -t turnip-prophet
0 20 * * 1-6 /usr/local/bin/openclaw gateway call message.send --params '{"channel":"telegram","target":"8577655544","message":"🔔 Evening price check: Check Nook'''s Cranny!"}' 2>&1 | logger -t turnip-prophet
45 21 * * 6 /usr/local/bin/openclaw gateway call message.send --params '{"channel":"telegram","target":"8577655544","message":"⏰ FINAL CALL: Turnips expire at 10 PM! Sell now or they'''ll rot 🗑️"}' 2>&1 | logger -t turnip-prophet

Replace channel/target with detected values. Escape single quotes properly.

Show user what will be stored (before confirmation):

This will save:
• Channel: telegram
• User ID: 8577655544
• Location: memory/turnip-config.json (local only)

This data is stored locally on your machine and is needed so cron reminders can send messages to you.
You can delete the config file anytime with: rm memory/turnip-config.json

Continue? Reply 'confirm' to proceed, or 'cancel' to skip.

On confirmation:

1. Write config to memory/turnip-config.json
2. Generate a safe install command and show it to the user:

   # Save the cron entries to a temp file
   cat > /tmp/turnip-cron-$$.txt <<'TURNIP_EOF'
   [generated entries]
   TURNIP_EOF
   
   # Review the file
   cat /tmp/turnip-cron-$$.txt
   
   # If it looks good, install:
   (crontab -l 2>/dev/null; cat /tmp/turnip-cron-$$.txt) | crontab -
   

3. Ask user to run the commands and confirm when done
4. Reply: "✅ Reminders configured. You'll only get pings for missing data. Check crontab -l to verify installation. To remove: rm memory/turnip-config.json and remove the cron entries."

On rejection/cancel:

• Reply: "No problem. No data was stored. You can set this up anytime by asking about turnip prices again."

Cron Handler (scripts/cron_handler.sh)

The cron script reads from memory/turnip-config.json for channel/target:

CONFIG_FILE="$SKILL_DIR/memory/turnip-config.json"
if [[ ! -f "$CONFIG_FILE" ]]; then
    echo "Config not found: $CONFIG_FILE" >&2
    exit 1
fi

CHANNEL=$(jq -r '.channel' "$CONFIG_FILE")
TARGET=$(jq -r '.target' "$CONFIG_FILE")
OPENCLAW_BIN=$(jq -r '.openclaw_bin' "$CONFIG_FILE")

Event types:

sunday-daisy:

• Check if memory/turnip-week.json has a buy_price for current week
• If missing: Send reminder "🔔 Sunday! Check Daisy Mae's turnip price (90-110 bells) and buy your turnips 🥬"
• If already set: Stay silent

daily-check:

• Determine which price slot is currently active (Mon AM/PM through Sat PM)
• Check if that slot is filled in memory/turnip-week.json
• If missing: Send reminder "🔔 [Day] [AM/PM]: Check Nook's Cranny turnip prices!"
• If already filled: Stay silent

saturday-final:

• Check how many prices are still null
• If any missing OR no buy_price: Send "⏰ FINAL CALL: Turnips expire at 10 PM! Sell now or they'll rot 🗑️"
• If all prices known: "⏰ Last chance to sell turnips tonight!"

Send via: "$OPENCLAW_BIN" gateway call message.send --params "{\"channel\":\"$CHANNEL\",\"target\":\"$TARGET\",\"message\":\"...\"}"

How It Works

The skill uses a Python implementation of the actual ACNH turnip price algorithm to predict future prices based on:

• Your Sunday buy price (90-110 bells)
• Any known sell prices from this week
• Previous week's pattern (if known)

There are 4 price patterns:

• Pattern 0 (Fluctuating): High-low-high-low-high waves
• Pattern 1 (Large Spike): Decreasing then massive spike (up to 6x)
• Pattern 2 (Decreasing): Consistently declining (bad week)
• Pattern 3 (Small Spike): Decreasing then moderate spike (up to 2x)

Usage Instructions

When triggered:

1. Read memory/turnip-week.json — get all known data
2. Update the file if the user provided a new price
3. Run the prediction with all known data
4. Generate a chart and send it with the prediction summary

Running the Prediction

echo '{"buy_price": 96, "prices": [84, 81, 78, null, null, null, null, null, null, null, null, null], "previous_pattern": 1}' | python3 scripts/turnip_predict.py

• prices array: [Mon AM, Mon PM, Tue AM, Tue PM, Wed AM, Wed PM, Thu AM, Thu PM, Fri AM, Fri PM, Sat AM, Sat PM]
• Use null for unknown prices

Generating the Chart

After running the prediction, generate a chart image:

python3 scripts/generate_chart.py <buy_price> '<known_json>' '<mins_json>' '<maxs_json>' /tmp/turnip-chart.png

• buy_price: Sunday buy price (integer)
• known_json: array of 12 values, null for unknown (from memory/turnip-week.json prices)
• mins_json: array of 12 min values from the prediction output
• maxs_json: array of 12 max values from the prediction output
• All script paths are relative to the skill directory: skills/turnip-prophet/

Then send the chart image via the message tool with a caption containing the prediction summary.

Always include the chart with every prediction update.

Presenting Results

Send the chart image via message tool, then reply with a conversational analysis. Don't be robotic — have a personality about it.

Format:

1. Chart image with brief caption (buy price, known prices)
2. Text reply with:
   • Pattern odds as a bullet list with emoji reactions (😬🤞🚀💀 etc.)
   • Brief colour commentary — what the data actually means in plain English
   • "My take:" — a specific, opinionated recommendation for what to do next (which price to check, when to sell, when to hold)

Example:

Pattern odds:
📉 Decreasing: 84.7% 😬
📈 Large Spike: 15.1% 🤞
📊 Small Spike: 0.1%

Not great. Three consecutive drops is strongly pointing to a decreasing week. But there's still a 15% chance of a large spike hiding — if it happens, it'd be Wed-Fri with prices up to 576 bells.

My take: Check the Tuesday PM price. If it drops again, this week is almost certainly a bust — sell and cut your losses. If it jumps up, the spike is on. 🎰

Be direct, be opinionated, skip patterns with 0% probability.

Pattern Descriptions for Users

• Fluctuating (0): Prices go up and down in waves — sell when above 120-130
• Large Spike (1): Prices drop then SPIKE huge (400-600 bells) — wait for it!
• Decreasing (2): Prices keep falling all week — sell ASAP to cut losses
• Small Spike (3): Prices drop then small bump (150-200) — sell during the bump

Error Handling

If the script fails or returns an error:

• Explain what went wrong in simple terms
• Ask user to double-check their input data
• Suggest they try again with corrected information

Notes

• Predictions are probabilistic, not guaranteed
• The algorithm matches the actual game code
• More known prices = better predictions
• Sunday buy price is required
• Previous week's pattern helps but isn't required