env

Imported from Wangyh666-ust/kaggle---kaggriculture (env/AGENTS.md). Install upstream with npx skills add Wangyh666-ust/kaggle---kaggriculture --skill env. Copyright stays with the author.

Kaggriculture: Getting Started

This guide walks you through building an agent, testing it locally, and submitting it to the Kaggriculture competition on Kaggle.

For full game rules, the crop / animal / shop tables, the price function, and turn-processing order, see README.md.

Game Overview

Kaggriculture is a two-player farming sim. Each player manages a farm and competes to earn the most coins by buying seeds and livestock, planting, watering, harvesting, raising animals, hiring help, and trading on a dynamic market over a fixed season.

• Farm — each player has a boardSize × boardSize grid (default 10 × 10) divided into four 5 × 5 quadrants. Only the NW quadrant is unlocked at the start; the other three (NE, SW, SE) can be bought via BUY_LAND for $1k / $2k / $4k respectively
• Starting bank — startingMoney defaults to $3000
• Farmer & farm hands — one main farmer per player, plus up to N hired hands per day. Hire cost is farmHandCostMult * fib(n) where n is the number of hires already made today; with the default farmHandCostMult = 1 that's 1, 1, 2, 3, 5, 8, 13, 21, ... and resets at the start of each day. Each unit independently acts every turn
• Crops — Wheat, Carrot, Tomato (ongoing), Strawberry (ongoing), Melon. Each has its own seed cost, growth time, yield curve, and base sale price (see the Object Types table in README.md)
• Watering bonus — for one-time crops, watering during the bonus window (starting at ceil(max_yield_day / 2)) adds 1 unit per day to harvestable yield. FERTILIZE doubles that bonus for 3 days. For ongoing crops, scheduled production yields 1 by default, doubled to 2 if both fertilized and watered that day
• Animals — Goose (eggs, requires coop), Cow (milk, requires pasture), Sheep (wool, requires pasture). Must be fed wheat daily; CARE banks +1 per fed-and-cared day, paid out in full on the next scheduled production; COLLECT_FERTILIZER gathers 1 fertilizer/animal/day. Unlike crops, animals produce indefinitely as long as they are fed — max_held caps unharvested product on the tile, not lifetime output
• Watering / feeding — plants must be watered and animals fed daily. Two consecutive missed end-of-day refreshes turn plants into weeds and cause animals to escape (unrecoverable). The planting day counts as the first unwatered day
• Decay — once a plant passes its max lifespan (one day after max_yield_day for one-time crops, one day after the cumulative production cap for ongoing crops), yield_units drops by 1 every other turn until 0, at which point the tile becomes a weed
• Weeds — every empty unlocked tile has a weedSpawnChance (default 0.005) of spawning a weed at end-of-day; clear with DIG
• Shed — non-seed inventory cap of 100 items. Items beyond the cap at end-of-day drop are discarded. Seeds live in their own slot (no cap, never picked up by PICKUP — PLANT consumes them directly)
• Market — fixed prices for seeds, animals, and BUY_PRODUCT orders; sale prices for harvested produce vary dynamically with market inventory. Price is base at the shared starting inventory I0, rises as inventory falls, and falls as inventory grows, using a per-resource shape function (linear, sq, sqrt, or log) that can differ on each side of I0 — so gluts hit premium goods (strawberry, melon, milk, wool) hard, driving them to the $1 floor, while staples absorb oversupply more gently (see the Price Function table in README.md). Only wheat and fertilizer can be bought back via BUY_PRODUCT; every product can be sold via SELL. Each turn, at most maxMarketOrdersPerTurn (default 10) orders are processed per player; extras are silently dropped
• Town — town center always demands product (1 of each non-fertilizer product every townCenterSellInterval turns, default 24 — once per day, flat for the whole season). Additional shops unlock every townShopUnlockInterval days (default 3, drawn uniformly at random with replacement, so duplicates are possible; capped at 8 instances); each unlocked shop instance consumes one of every product it demands every townShopSellInterval turns (default 4, single-product shops consume 2×) — see the Town Buildings table in README.md
• Season length — 24 turns per day × 30 days = 720 turns by default
• Win condition — most coins in the bank at the end of the season; ties are possible

Your Agent

Your agent is a function that receives an observation and returns an action dict.

Observation fields:

• player — your player index (0 or 1)
• step — current turn (0-indexed; supplied by the kaggle-environments framework)
• day — current in-game day (0-indexed)
• hour — turn within the day (0-indexed, 0..turnsPerDay-1)
• farms — list with one entry per player (public; both farms visible). Each entry has:
  • money — current bank balance
  • tiles — 2D array indexed tiles[y][x]. Each tile is None (empty unlocked), "LOCKED" (locked quadrant), a plant dict (kind="PLANT", crop, planted_day, watered_today, consecutive_unwatered, yield_units, max_lifespan_step, fertilized_until_day), a weed dict (kind="WEED"), or an animal-structure dict (kind="COOP" or "PASTURE", optionally with animal, placed_day, yield_units, fed_today, consecutive_unfed, cared_today, fertilizer_available, pending_care_bonus)
  • farmer — [x, y] position of the main farmer (x = column, y = row)
  • hands — list of [x, y] positions for any hired farm hands this day
  • unlocked_quadrants — subset of ["NW", "NE", "SW", "SE"]
  • hires_today — number of hands hired so far today (drives the next HIRE cost)
• private — your player only; opponent's private state is hidden:
  • shed — {item: count} for harvested produce, animals, and fertilizer in storage
  • seeds — {crop: count}; seeds live in their own slot and are consumed directly by PLANT
  • inventories — [main_farmer_inv, hand1_inv, ...]; per-unit inventories carried in the field
• market — shared:
  • inventory — {product: int} current market supply
  • prices — {product: int} current per-unit sale price (rounded, floor 1)
• town — shared: unlocked_shops — list of currently-active shop names; names may repeat (shops are drawn with replacement) and each entry consumes independently

Action format:

{
  "farmer": [op, ...args],          # one main-farmer op this turn
  "hands":  [[op, ...args], ...],   # one op per hired hand, in hands order
  "market": [[op, ...args], ...],   # ordered list of market orders, capped at maxMarketOrdersPerTurn
}

Farmer / hand ops:

• Movement: "NORTH", "SOUTH", "EAST", "WEST", "PASS". Locked tiles are passable — units can cross unbought quadrants but cannot act there
• Shed / inventory: "PICKUP" <item> [n] (from shed), "PLACE" <item> [n] (places an animal on a matching structure when standing on it, or drops items into the shed when adjacent to it), "DROP" (when shed-adjacent, dumps entire inventory into shed; overflow past shedCapacity discarded). "Shed-adjacent" means standing on one of the four center tiles: (4,4), (5,4), (4,5), (5,5). The shed itself is not in tiles.
• Plants: "PLANT" <crop>, "WATER", "HARVEST", "FERTILIZE"
• Animals: "BUILD_COOP", "BUILD_PASTURE", "FEED", "COLLECT_FERTILIZER", "CARE"
• Terrain: "DIG" (removes a plant, weed, or empty coop/pasture from the current tile; a structure with an animal on it cannot be dug)

Market ops: ["BUY_SEED", crop, n], ["BUY_PRODUCT", item, n], ["BUY_ANIMAL", animal, n], ["SELL", item, n], ["HIRE"], ["BUY_LAND"]. Invalid actions are silent no-ops.

Example — Wheat Loop:

For wheat (first_yield_day = 2, max_yield_day = 4), the bonus watering window is days 2–4. We plant, water during the window, and harvest at day 2 or later.

def agent(obs):
    player = obs["player"]
    me = obs["farms"][player]
    private = obs["private"]
    fx, fy = me["farmer"]
    tile = me["tiles"][fy][fx]

    market = []
    if private["seeds"].get("WHEAT", 0) == 0 and me["money"] >= 10:
        market.append(["BUY_SEED", "WHEAT", 1])
    # Sell any wheat sitting in the shed.
    wheat_in_shed = private["shed"].get("WHEAT", 0)
    if wheat_in_shed > 0:
        market.append(["SELL", "WHEAT", wheat_in_shed])

    if tile is None and private["seeds"].get("WHEAT", 0) > 0:
        return {"farmer": ["PLANT", "WHEAT"], "hands": [], "market": market}
    if isinstance(tile, dict) and tile.get("kind") == "PLANT":
        crop_age = obs["day"] - tile["planted_day"]
        if crop_age >= 2:  # WHEAT first_yield_day = 2; harvest as soon as possible
            return {"farmer": ["HARVEST"], "hands": [], "market": market}
        if not tile["watered_today"]:
            return {"farmer": ["WATER"], "hands": [], "market": market}

    return {"farmer": ["PASS"], "hands": [], "market": market}

For a fuller example (and per-crop yield/cost details for Carrot, Tomato, Strawberry, and Melon), see the Object Types and Quick Start sections in README.md.

Test Locally

Install the environment from PyPI (any recent release that includes Kaggriculture):

pip install -U kaggle-environments

Run a game from Python or a notebook — you can pass agent functions directly, or paths to .py files:

from kaggle_environments import make

env = make("kaggriculture", configuration={"episodeSteps": 720}, debug=True)
env.run([agent, "random"])  # or env.run(["main.py", "random"]) to load from a file

# View result
final = env.steps[-1]
for i, s in enumerate(final):
    print(f"Player {i}: reward={s.reward}, status={s.status}")

# Render in a notebook
env.render(mode="ipython", width=1200, height=800)

# Or dump a replay JSON for the visualizer / offline analysis
import json
with open("replay.json", "w") as f:
    json.dump(env.toJSON(), f)

Three built-in agents are available by name: "pass", "random", and "starter" (a deterministic baseline).

Set Up the Kaggle CLI

Install the CLI:

pip install kaggle

You'll need a Kaggle account — sign up at https://www.kaggle.com if you don't have one. Then download your API credentials at https://www.kaggle.com/settings/api by clicking "Generate New Token" under the "API" section.

Recommended: API token file. Save the token string to ~/.kaggle/access_token:

mkdir -p ~/.kaggle
# Paste the token from the Kaggle settings UI into this file
nano ~/.kaggle/access_token
chmod 600 ~/.kaggle/access_token

Alternative auth methods:

• OAuth (browser flow): kaggle auth login
• Environment variable: export KAGGLE_API_TOKEN=xxxxxxxxxxxxxx

Verify the CLI is wired up:

kaggle competitions list -s "kaggriculture"

Find the Competition

kaggle competitions list -s "kaggriculture"
kaggle competitions pages kaggriculture
kaggle competitions pages kaggriculture --content

Accept the Competition Rules

Before submitting, you must accept the rules on the Kaggle website. Navigate to https://www.kaggle.com/competitions/kaggriculture and click "Join Competition".

Verify you've joined:

kaggle competitions list --group entered

Download Competition Data

kaggle competitions download kaggriculture -p kaggriculture-data

Submit Your Agent

Your submission must have a main.py at the root with an agent function.

Single file agent:

kaggle competitions submit kaggriculture -f main.py -m "Wheat loop v1"

Multi-file agent — bundle into a tar.gz with main.py at the root:

tar -czf submission.tar.gz main.py helper.py model_weights.pkl
kaggle competitions submit kaggriculture -f submission.tar.gz -m "Multi-file agent v1"

Notebook submission:

kaggle competitions submit kaggriculture -k YOUR_USERNAME/kaggriculture-agent -f submission.tar.gz -v 1 -m "Notebook agent v1"

Monitor Your Submission

Check submission status:

kaggle competitions submissions kaggriculture

Note the submission ID from the output — you'll need it for episodes.

List Episodes

Once your submission has played some games:

kaggle competitions episodes <SUBMISSION_ID>

CSV output for scripting:

kaggle competitions episodes <SUBMISSION_ID> -v

Download Replays and Logs

Download the replay JSON for an episode (for visualization or analysis):

kaggle competitions replay <EPISODE_ID>
kaggle competitions replay <EPISODE_ID> -p ./replays

Download agent logs to debug your agent's behavior:

# Logs for the first agent (index 0)
kaggle competitions logs <EPISODE_ID> 0

# Logs for the second agent (index 1)
kaggle competitions logs <EPISODE_ID> 1 -p ./logs

Check the Leaderboard

kaggle competitions leaderboard kaggriculture -s

Typical Workflow

# Test locally
python -c "
from kaggle_environments import make
env = make('kaggriculture', debug=True)
env.run(['main.py', 'random'])
print([(i, s.reward) for i, s in enumerate(env.steps[-1])])
"

# Submit
kaggle competitions submit kaggriculture -f main.py -m "v1"

# Check status
kaggle competitions submissions kaggriculture

# Review episodes
kaggle competitions episodes <SUBMISSION_ID>

# Download replay and logs
kaggle competitions replay <EPISODE_ID>
kaggle competitions logs <EPISODE_ID> 0

# Check leaderboard
kaggle competitions leaderboard kaggriculture -s