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Yoink · bankrbot | DecimalAI

Registry skillby bankrbot

Yoink

bankrbot/yoink

Source bankrbot/skills ↗License Not recorded

Play Yoink, an onchain capture-the-flag game on Base. Yoink the flag from the current holder, check game stats and leaderboards, view player scores, and compete for the trophy. Uses Bankr for transaction execution.

SkillScore100Maintained

Automatic

Coding pack

Last verified 8/15/2026

What it changes

Passed 22 of 22 test cases with the skill, and 5 of 22 without it.

Without skill23%

With skill100%

Checks it passed that the model alone missed

The response names the topYoinker method.
The response specifies selector 0x6a974e6e.
The response specifies selector 0xd2d7774a.

and 28 more in the full report

17 fixed5 passed either way0 still failing0 broke

Pass-rate lift: +77 pp
Tokens: +1%
Agent turns: 0%
Response time: -53%

Model gemini-3.6-flashMeasured 8/15/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/bankrbot-yoink/SKILL.md https://app.decimal.ai/s/bankrbot-yoink/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add bankrbot-yoink, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/bankrbot-yoink/ and pins it in .decimal/skills.lock

decimalai skills add bankrbot-yoink

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/bankrbot-yoink/SKILL.md https://app.decimal.ai/s/bankrbot-yoink/SKILL.md

Raw file: /s/bankrbot-yoink/SKILL.md ↗ · machine-readable summary at /s/bankrbot-yoink.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 17 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 17

Prompt

Which contract method tells me the current leader who holds the trophy in Yoink, and what selector does it use?

What was checked, without and with the skill
Checked	Without skill	With skill
The response names the topYoinker method.	Missed	Passed
The response specifies selector 0x6a974e6e.	Missed	Passed

case-17 · gemini-3.6-flash · 8/15/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md70 linessingle file

Yoink

Play Yoink, an onchain capture-the-flag game on Base. Yoink the flag from the current holder to start your clock. The player with the most total yoinks holds the trophy.

Contract: 0x4bBFD120d9f352A0BEd7a014bd67913a2007a878 on Base (chain ID 8453)

Game Rules

Yoink the flag - Call yoink() to take the flag from the current holder
Cooldown - You must wait 10 minutes (600 seconds) between yoinks
No self-yoink - You cannot yoink from yourself
Accumulate time - While you hold the flag, your time score increases
Compete for trophy - The player with the most total yoinks holds the trophy (token ID 2)
Track yoinks - Your total yoink count is tracked separately from time

Contract Interface

RPC template:

curl -s -X POST https://mainnet.base.org -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"eth_call","params":[{"to":"0x4bBFD120d9f352A0BEd7a014bd67913a2007a878","data":"SELECTOR+PARAMS"},"latest"],"id":1}' | jq -r '.result'

Function	Selector	Params	Returns
`yoink()`	`0x9846cd9e`	-	(write)
`lastYoinkedBy()`	`0xd4dbf9f4`	-	address
`lastYoinkedAt()`	`0x6a99616f`	-	uint256 timestamp
`totalYoinks()`	`0xa5d0dadd`	-	uint256
`topYoinker()`	`0x6a974e6e`	-	address (trophy holder)
`mostYoinks()`	`0xd2d7774a`	-	uint256 (record)
`COOLDOWN()`	`0xa2724a4d`	-	uint256 (600)
`score(address)`	`0x776f3843`	addr (32B padded)	(yoinks, time, lastYoinkedAt)
`balanceOf(address,uint256)`	`0x00fdd58e`	addr + tokenId	uint256 (FLAG_ID=1, TROPHY_ID=2)

Encoding: Addresses are zero-padded to 32 bytes. score() returns 96 bytes (3 × uint256).

Yoinking

Use Bankr's arbitrary transaction feature:

Track record

Benchmark

22 / 22

test cases passed, vs 5 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

bankrbot / skills

yoink/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Yoink

Game Rules

Contract Interface

Yoinking

Track record

Benchmark

Adoption

SkillSafety

Source

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