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 runxhq/runx --skill spendgit clone --depth 1 https://github.com/runxhq/runxWrote 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/runxhq/runx/spend)<a href="https://agentmods.dev/skills/runxhq/runx/spend"><img src="https://agentmods.dev/badge/skills/runxhq/runx/spend/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/runxhq/runx/spend"><img src="https://agentmods.dev/badge/skills/runxhq/runx/spend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00019 | $0.00282 |
| Opus 5 | $0.00010 | $0.00141 |
| Sonnet 5 | $0.00004 | $0.00056 |
| Haiku 4.5 | $0.00002 | $0.00028 |
Grade A, and why
spend 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 8d 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.
What it actually says
Spend
spend is the canonical public buyer-side payment contract. The single default
runner submits an exact payment signal, full parent authority, explicit hosted
rail, opaque rail profile, optional opaque admission material, realm, and stable
idempotency seed to Runx Hosted. It closes only after provider readback matches
the mutation result.
Runx Hosted owns quote validation, authority attenuation and reservation, aggregate limits, approval admission, credential custody, rail execution, idempotency, recovery, finality, and the private payment ledger. The OSS runtime owns only generic provider permission enforcement and receipt sealing. There is no local real-payment implementation and no automatic mock fallback.
Operator guide
Use charge for seller-side paid calls, refund for reversals, and
settle-invoice when an invoice first needs hosted validation. The selected
hosted connector needs payment.spend and payment.spend.read grants.
Stop on malformed or ambiguous signals, missing complete authority, absent rail profile, cap or binding drift, missing approval, unavailable hosted execution, or inconsistent readback. Never put card data, wallet keys, provider keys, tokens, or arbitrary endpoints in skill input.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 32 lines · 19 tokens per session scan A 45b448c7edf3
spend is a skill published in the GitHub repository runxhq/runx (87 stars, last pushed 3d ago), licensed Apache-2.0. It adds 19 tokens to every session and 282 once invoked, about $0.0001 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 2026-09-03.
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