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 hoangsonww/Claude-Code-Agent-Monitor --skill daily-budget-checkgit clone --depth 1 https://github.com/hoangsonww/Claude-Code-Agent-MonitorWrote 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/hoangsonww/claude-code-agent-monitor/daily-budget-check)<a href="https://agentmods.dev/skills/hoangsonww/claude-code-agent-monitor/daily-budget-check"><img src="https://agentmods.dev/badge/skills/hoangsonww/claude-code-agent-monitor/daily-budget-check/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/hoangsonww/claude-code-agent-monitor/daily-budget-check"><img src="https://agentmods.dev/badge/skills/hoangsonww/claude-code-agent-monitor/daily-budget-check.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 | $0.00081 | $0.00766 |
| Opus 5 | $0.00041 | $0.00383 |
| Sonnet 5 | $0.00016 | $0.00153 |
| Haiku 4.5 | $0.00008 | $0.00077 |
Grade A, and why
daily-budget-check 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 13d 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 — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Daily Budget Check
A fast daily pulse: are you on pace against today's budget?
Input
The user provides: $ARGUMENTS
This is the daily budget in dollars — e.g. "5" or "$5/day". If omitted, ask
for one or derive it from a monthly budget (monthly / days_in_month) and state the
assumption.
Data Sources
| Endpoint | Returns |
|---|---|
GET /api/pricing/cost |
{ total_cost, breakdown: [{ model, input_tokens, output_tokens, cache_read_tokens, cache_write_tokens, cost, matched_rule }] } — fleet-wide spend and the avg cost-per-session used to value today's sessions |
GET /api/sessions?limit=200 |
Session list with inline cost and started_at — filter to today (DATE(started_at) = today) to isolate today's spend |
Method
Spend has no per-day field, so isolate today from the session list:
- Today's sessions = sessions whose
started_atis today (local date). - Today's spend = sum of inline
costover today's sessions. If inlinecostis absent for some rows, fall back totoday_session_count × (total_cost / total_session_count)and flag it as approximate. - Pace:
fraction_of_day_elapsed = hours_since_midnight / 24.expected_by_now = daily_budget × fraction_of_day_elapsed. - Pace delta =
today_spend − expected_by_now(▲ ahead of budget / ▼ behind). - End-of-day projection:
projected_today = today_spend / fraction_of_day_elapsed(linear extrapolation of the current pace). Guard against tinyfraction_of_day_elapsedearly in the day — if under ~0.1, label the projection low-confidence. - Projected overage =
projected_today − daily_budget(positive = over).
Report Sections
1. Today vs budget
One headline line: today's spend / daily budget, and the percent consumed. Verdict: under / on pace / over.
2. Pace
expected_by_now vs actual today_spend, the ▲/▼ pace delta, and the fraction of the day elapsed.
3. End-of-day projection
projected_today and the projected overage/headroom vs the daily budget. Note the confidence (low early in the day).
What ships with it
1 file 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.
- 13d ago First seen · 61 lines · 81 tokens per session scan A 9dfde4104e63
daily-budget-check is a skill published in the GitHub repository hoangsonww/Claude-Code-Agent-Monitor (991 stars, last pushed 4d ago), licensed MIT. It adds 81 tokens to every session and 766 once invoked, about $0.0004 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 2026-08-30.
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