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 kensaurus/cursor-kenji --skill audit-infra-costgit clone --depth 1 https://github.com/kensaurus/cursor-kenjiWrote 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/kensaurus/cursor-kenji/audit-infra-cost)<a href="https://agentmods.dev/skills/kensaurus/cursor-kenji/audit-infra-cost"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/audit-infra-cost/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/kensaurus/cursor-kenji/audit-infra-cost"><img src="https://agentmods.dev/badge/skills/kensaurus/cursor-kenji/audit-infra-cost.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 | $0.00076 | $0.01353 |
| Opus 5.5 | $0.00030 | $0.00541 |
| Sonnet 5.5 | $0.00015 | $0.00271 |
| Haiku 4.5 | $0.00008 | $0.00135 |
Grade A, and why
audit-infra-cost 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 1mo 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 — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
audit-infra-cost — Hosting spend without hurting reliability
Degree of freedom: HIGH — quantify and plan. Phase 2 stays plan-only
until approved. Never propose a cut that weakens backups (plan-backup-dr).
Read-only. Find where money leaks in the infra bill and plan cuts that do not trade away reliability.
For a solo operator, infra cost is runway. A silent egress or storage leak can double a bill nobody is watching.
Quantify and plan. Apply only on approval. Never propose a cut that weakens backups (
plan-backup-dr) or user experience.
This skill vs neighbors
| Skill | Owns |
|---|---|
| audit-infra-cost (this) | Compute, storage, bandwidth, platform fees |
audit-cicd |
GitHub Actions minutes / artifacts |
plan-llm-cost-guardrails |
Model tokens / quota abuse |
test-load |
Measured peak — right-size to this, not a guess |
audit-bundle-size / audit-performance |
Client payload (feeds egress) |
backend-db-performance |
The index that stops compute burn |
How to reason
- Observe — billed resource, pricing model, and (if exposed) the breakdown line
- Interpret — is this utilization, a leak (egress/storage/zombies), or a tier mismatch?
- Classify — safe quick win / medium / structural / do-not-cut (backup/UX)
- Severity — by $ magnitude × reliability risk, not by how easy the cut looks
Worked example
Observe: object-storage bill is 40% of spend; logs prefix has no lifecycle; backups retained 90 days (DR requirement). Interpret: unbounded logs are the leak; backup retention is not a cut. Classify: safe quick win (expire temp logs) + do-not-cut (backups). Severity: major $; reliability risk low if only temp logs expire. Finding: logs | ~X% | lifecycle 7d | do not touch backup prefix
Phase 0 — Map the spend surface [HIGH freedom]
Enumerate billed resources and, if the provider exposes it, the breakdown:
- Compute (functions / servers / containers)
- Database (compute + storage + connections)
- Object storage (GB + operations)
- Egress (usually the sneaky line)
- CDN, per-seat / per-project fees
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.
- 1mo ago Changed · +3 lines · -5 tokens per session 65fba4794f07
- 1mo ago First seen · 140 lines · 81 tokens per session scan A 64dba65260eb
audit-infra-cost is a skill published in the GitHub repository kensaurus/cursor-kenji (9 stars, last pushed 26d ago), licensed MIT. It adds 76 tokens to every session and 1,353 once invoked, about $0.0003 per session on Opus 5.5. 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.
Other skills, from other repositories
aws-cost-estimator
Estimate or review cost for proposed AWS resources (compute, storage, data transfer). Use when the user asks for cost estimate or cost optimization.
nginx-config-optimizer
Optimizes Nginx configurations for performance, security, caching, and load balancing with modern best practices. Use when users request "Nginx setup", "reverse proxy", "load balancer", "web server config", or "Nginx optimization".
capacity-planning-helper
Estimates infrastructure needs based on traffic forecasts, workload analysis, and performance requirements with sizing recommendations and cost trade-offs. Use for "capacity planning", "infrastructure sizing", "resource estimation", or "scalability planning".
caching-cdn-strategy-planner
Designs multi-layer caching strategy with edge CDN, server-side caching, cache invalidation, and CDN configuration. Use for "caching strategy", "CDN setup", "cache invalidation", or "performance optimization".
sonicg-update-in-app-billing
OrbitalSonic Gemini Skill: Migrate existing orbitalsonic SonicInApp (https://github.com/orbitalsonic/SonicInApp) from v3.x to v4.0.0 — catalog bump, remove listeners, singleton BillingManager, Flow/suspend API, offerId threading. Use when upgrading SonicInApp/inappbilling, Play Billing 9 migration, legacy…
sonicc-implement-firebase-remote-config
OrbitalSonic Claude Skill: First-time Firebase Remote Config with SharedPreferences cache, FetchRemoteConfigUseCase, and StartupFragment / StartupScreen fetch. Use when adding the RC stack for the first time, fetchAndActivate, or /sonicc-implement-firebase-remote-config — not for extra keys on an existing cache (use…