Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add playbattlegrid/battlegrid-mcp --skill battlegrid-arena-playgit clone --depth 1 https://github.com/playbattlegrid/battlegrid-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/playbattlegrid/battlegrid-mcp/battlegrid-arena-play)<a href="https://agentmods.dev/skills/playbattlegrid/battlegrid-mcp/battlegrid-arena-play"><img src="https://agentmods.dev/badge/skills/playbattlegrid/battlegrid-mcp/battlegrid-arena-play/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/playbattlegrid/battlegrid-mcp/battlegrid-arena-play"><img src="https://agentmods.dev/badge/skills/playbattlegrid/battlegrid-mcp/battlegrid-arena-play.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00107 | $0.01756 |
| Opus 5 | $0.00053 | $0.00878 |
| Sonnet 5 | $0.00021 | $0.00351 |
| Haiku 4.5 | $0.00011 | $0.00176 |
Grade A, and why
battlegrid-arena-play scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Arena Play
A submission is a wager. On a paid session the entry fee moves as part of the submit call, and the grid you submit is the one that gets scored. There is no draft state and no undo.
The three failures this flow exists to prevent
- A blind submission. Cue: "just enter me", "pick something", any ask that skips reading. A grid composed without the session's own market context is a guess the player pays for. → steps 2–3.
- A stale or superseded agent grid submitted. Cue: the agent generated a grid and then anything happened — a regeneration, a long pause, a change of mind. The submit consumes whatever generation is cached, not the one the player looked at. → step 4.
- Restating a limit number. Cue: the urge to say "you have N entries left today" or "your cap is $X". Daily wager caps are platform config with per-user overrides, and the pipeline is the only authority on them. → the negatives below.
Sequence
1. Account state first
get_account_state. It carries the balance, the rank, and mcpWagerEnabled — a served
projection of the player's Server-Signed Wagers signer consent.
- False ⇒ say so up front, name the enablement path (Profile → Wallet tab → enable Agent Wagers), and continue read-only: sessions, market context, results and journals are all still useful. Do not pretend a submit will work.
- True ⇒ proceed. It is a routing signal for what you tell them, never an authorization: the wager pipeline re-checks consent at the fee itself, and its refusal is the authority in either direction.
2. Workflow A reads, in order
list_market_grid_sessionswith statusPENDING— the sessions still enterable. ThesessionIdyou use comes from here; never fabricate one.get_market_grid_session— the coin pool (note each coin'sid), the entry fee, the pool and the lock time.get_market_contextfor that session — the indicators, rankings and trends the picks will actually be reasoned from.check_market_grid_submission— before composing anything. If a submission already exists, report it (with its id and time) and offerupdate_market_gridwhere the session still permits it. Never compose a duplicate.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 7d ago First seen · 133 lines · 107 tokens per session scan A 03fa153bf82b
battlegrid-arena-play is a skill published in the GitHub repository playbattlegrid/battlegrid-mcp (0 stars, last pushed yesterday), licensed MIT. It adds 107 tokens to every session and 1,756 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-05.
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