feat(skills): add qrcoin auction skill

skills/merklemoltbot/qrcoin/SKILL.md

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+---
+name: qrcoin
+description: Interact with QR Coin auctions on Base. Create bids, contribute to existing bids, check auction status, and monitor token details. Use when user wants to participate in qrcoin.fun QR code auctions.
+metadata: {"clawdbot":{"emoji":"📱","always":false,"requires":{"bins":["curl","jq"]}}}
+---
+
+# QR Coin Auction 📱
+
+Interact with [QR Coin](https://qrcoin.fun) auctions on Base blockchain. QR Coin lets you bid to display URLs on QR codes — the highest bidder's URL gets encoded.
+
+## Contracts (Base Mainnet)
+
+| Contract | Address |
+|----------|---------|
+| QR Auction | `0x7309779122069EFa06ef71a45AE0DB55A259A176` |
+| USDC | `0x833589fCD6eDb6E08f4c7c32D4f71b54bdA02913` |
+| QR Token | `0xFfFFfFff58b6fc02E91A79AE6BEf0C97d4eed2b7` |
+
+## Quick Reference
+
+### Check Auction Status
+
+```bash
+# Get current token ID
+curl -s -X POST https://mainnet.base.org \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x7309779122069EFa06ef71a45AE0DB55A259A176","data":"0x7d9f6db5"},"latest"],"id":1}' \
+  | jq -r '.result' | xargs printf "%d\n"
+
+# Get auction end time for token ID
+TOKEN_ID_HEX=$(printf '%064x' $TOKEN_ID)
+curl -s -X POST https://mainnet.base.org \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x7309779122069EFa06ef71a45AE0DB55A259A176","data":"0xa4d0a17e'"$TOKEN_ID_HEX"'"},"latest"],"id":1}' \
+  | jq -r '.result'
+```
+
+### Check Reserve Prices
+
+```bash
+# Create bid reserve (~11.11 USDC)
+curl -s -X POST https://mainnet.base.org \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x7309779122069EFa06ef71a45AE0DB55A259A176","data":"0x5b3bec22"},"latest"],"id":1}' \
+  | jq -r '.result' | xargs printf "%d\n" | awk '{print $1/1000000 " USDC"}'
+
+# Contribute reserve (~1.00 USDC)
+curl -s -X POST https://mainnet.base.org \
+  -H "Content-Type: application/json" \
+  -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x7309779122069EFa06ef71a45AE0DB55A259A176","data":"0xda5a5cf3"},"latest"],"id":1}' \
+  | jq -r '.result' | xargs printf "%d\n" | awk '{print $1/1000000 " USDC"}'
+```
+
+## Transactions
+
+### Approve USDC
+
+Before bidding, approve the auction contract to spend USDC.
+
+**Function:** `approve(address spender, uint256 amount)`
+**To:** `0x833589fCD6eDb6E08f4c7c32D4f71b54bdA02913` (USDC)
+**Spender:** `0x7309779122069EFa06ef71a45AE0DB55A259A176` (Auction)
+
+```
+Function Selector: 0x095ea7b3
+Parameters:
+  - spender: 0x7309779122069EFa06ef71a45AE0DB55A259A176
+  - amount: <USDC amount in 6 decimals>
+```
+
+### Create New Bid
+
+Create a new bid with your URL.
+
+**Function:** `createBid(uint256 tokenId, string memory url, string memory name)`
+**To:** `0x7309779122069EFa06ef71a45AE0DB55A259A176`
+
+```
+Function Selector: 0xf7842286
+Parameters:
+  - tokenId: Current auction token ID
+  - url: The URL you want displayed (e.g., "https://example.com")
+  - name: Your identifier (e.g., X handle without @)
+```
+
+**Cost:** ~11.11 USDC (createBidReserve)
+
+### Contribute to Existing Bid
+
+Add funds to an existing URL's bid.
+
+**Function:** `contributeToBid(uint256 tokenId, string memory url, string memory name)`
+**To:** `0x7309779122069EFa06ef71a45AE0DB55A259A176`
+
+```
+Function Selector: 0x7ce28d02
+Parameters:
+  - tokenId: Current auction token ID
+  - url: The URL of the existing bid
+  - name: Your identifier
+```
+
+**Cost:** ~1.00 USDC (contributeReserve)
+
+## Transaction with Bankr
+
+When using @bankrbot for transactions:
+
+```
+@bankrbot approve 50 USDC to 0x7309779122069EFa06ef71a45AE0DB55A259A176 on base
+
+@bankrbot send transaction to 0x7309779122069EFa06ef71a45AE0DB55A259A176 on base with data 0x... 
+```
+
+Build calldata using the function selectors and ABI encoding above.
+
+## ABI Encoding Helper
+
+### Encode createBid
+
+```bash
+# Function: createBid(uint256,string,string)
+# Selector: 0xf7842286
+
+TOKEN_ID=329
+URL="https://example.com"
+NAME="MerkleMoltBot"
+
+# ABI encode (requires python3 with eth-abi)
+python3 << PYEOF
+from eth_abi import encode
+data = encode(['uint256', 'string', 'string'], [$TOKEN_ID, '$URL', '$NAME'])
+print('0xf7842286' + data.hex())
+PYEOF
+```
+
+### Encode contributeToBid
+
+```bash
+# Function: contributeToBid(uint256,string,string)
+# Selector: 0x7ce28d02
+
+TOKEN_ID=329
+URL="https://grokipedia.com/page/debtreliefbot"
+NAME="MerkleMoltBot"
+
+# ABI encode
+python3 << PYEOF
+from eth_abi import encode
+data = encode(['uint256', 'string', 'string'], [$TOKEN_ID, '$URL', '$NAME'])
+print('0x7ce28d02' + data.hex())
+PYEOF
+```
+
+## Error Codes
+
+| Error | Meaning |
+|-------|---------|
+| `RESERVE_PRICE_NOT_MET` | Bid amount below minimum |
+| `URL_ALREADY_HAS_BID` | Use contributeToBid instead |
+| `BID_NOT_FOUND` | URL doesn't have existing bid |
+| `AUCTION_OVER` | Current auction has ended |
+| `AUCTION_NOT_STARTED` | Auction hasn't begun yet |
+
+## Workflow
+
+1. **Check auction status** - Get current token ID and time remaining
+2. **Approve USDC** - One-time approval for the auction contract
+3. **Create or contribute:**
+   - `createBid` - Start a new bid for your URL (~11.11 USDC)
+   - `contributeToBid` - Add to existing URL bid (~1.00 USDC)
+4. **Monitor** - Watch for lead changes as others bid
+
+## Links
+
+- Platform: https://qrcoin.fun
+- Contract: [BaseScan](https://basescan.org/address/0x7309779122069EFa06ef71a45AE0DB55A259A176)
+- Token: [BaseScan](https://basescan.org/token/0xFfFFfFff58b6fc02E91A79AE6BEf0C97d4eed2b7)

skills/merklemoltbot/qrcoin/_meta.json

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+{
+  "owner": "merklemoltbot",
+  "slug": "qrcoin",
+  "displayName": "QR Coin Auction",
+  "latest": {
+    "version": "1.0.0",
+    "publishedAt": null,
+    "commit": null
+  },
+  "history": []
+}