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 agentmods add skills/jaredlangleycc/nightshift-os/finance-lognpx skills add jaredlangleycc/nightshift-os --skill finance-loggit clone --depth 1 https://github.com/jaredlangleycc/nightshift-osWrote 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/jaredlangleycc/nightshift-os/finance-log)<a href="https://agentmods.dev/skills/jaredlangleycc/nightshift-os/finance-log"><img src="https://agentmods.dev/badge/skills/jaredlangleycc/nightshift-os/finance-log.svg" alt="Measured on agentmods" 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 | $0.00106 | $0.03650 |
| Opus 5 | $0.00053 | $0.01825 |
| Sonnet 5 | $0.00021 | $0.00730 |
| Haiku 4.5 | $0.00011 | $0.00365 |
Grade A, and why
finance-log scanned grade A with 1 finding 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 5d 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.
Strips warnings and disclaimerslowAnti-refusal
Omitting safety caveats hides risk from the user and is a common jailbreak preamble.
The questions do not moralize. They state the math and ask the user to sit with it. Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
How it starts
The opening of the file, as written. The whole thing — 400 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Finance Log
The money truth skill. Reads the user's transaction log. Computes burn, income, runway, and stale subscriptions. Surfaces the gap between what the user said they would spend and what the bank statements show.
Solopreneurs with a day job lie to themselves about three things: how much the business is making, how much the business is costing, and how long they can keep going if income drops. Finance-log makes each of those a number on a page.
When this skill triggers
/finance-log/finance-check/monthly-finance- "Burn audit"
- "Runway check"
- "Income vs expense"
- "What am I spending"
- "Am I making money"
- "Are there subscriptions I should kill"
- "Monthly check-in"
- Last Friday of every month (when called by
ship-it-fridayorfile-sweep) - Inside
weekly-brief(lightweight check only)
The data source
Read business-setup-playbook/finance-log.csv (or wherever the user pointed it during /customize-from-assessment).
Expected schema (one row per transaction):
date, type, category, vendor, amount, currency, note, tags
2026-05-22, expense, software, MailerLite, 0.00, USD, free tier, monthly
2026-05-22, expense, software, HubSpot, 20.00, USD, Starter SKU, monthly
2026-05-15, income, client, Sam, 800.00, USD, Foundation mo 2, client-payment
2026-05-01, expense, hosting, Microsoft 365, 6.00, USD, M365 Business Basic, monthly
If the CSV is missing or has fewer than 30 rows, ask the user to either:
- Drop the last 30 days of transactions manually (one per line), or
- Connect their bank export, or
- Open
examples/finance-log-starter.csvand start logging this month forward.
Do NOT fabricate finance data. Estimated burn is worse than honest blank burn.
The five computations
When /finance-log fires, compute and print all five.
1. Monthly burn (trailing 30 days)
Sum of all expense rows in the last 30 days. Categorize by tag:
- Recurring (tags include
monthlyorannualorsubscription) - One-time (everything else)
What ships with it
4 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.
- 5d ago First seen · 400 lines · 106 tokens per session scan A b4a444c0f682
finance-log is a skill published in the GitHub repository jaredlangleycc/nightshift-os (3 stars, last pushed 1mo ago), licensed MIT. It adds 106 tokens to every session and 3,650 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (strips warnings and disclaimers). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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