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 Manavarya09/cost-guardian --skill cost-reportgit clone --depth 1 https://github.com/Manavarya09/cost-guardianWrote 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/manavarya09/cost-guardian/cost-report)<a href="https://agentmods.dev/skills/manavarya09/cost-guardian/cost-report"><img src="https://agentmods.dev/badge/skills/manavarya09/cost-guardian/cost-report/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/manavarya09/cost-guardian/cost-report"><img src="https://agentmods.dev/badge/skills/manavarya09/cost-guardian/cost-report.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 | $0.00063 | $0.00440 |
| Opus 5 | $0.00032 | $0.00220 |
| Sonnet 5 | $0.00013 | $0.00088 |
| Haiku 4.5 | $0.00006 | $0.00044 |
Grade A, and why
cost-report scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Cost Report
Generate formatted cost reports with ASCII charts.
Commands
/cost-report or /cost-report session
Show current session report (enhanced with model breakdown and top expensive calls):
node "${CLAUDE_SKILL_DIR}/../../scripts/reporter.js" session "${CLAUDE_SESSION_ID}"
/cost-report daily
Show last 7 days with day-of-week labels, averages, and projected monthly:
node "${CLAUDE_SKILL_DIR}/../../scripts/reporter.js" daily 7
/cost-report weekly
Show last 4 weeks (28 days):
node "${CLAUDE_SKILL_DIR}/../../scripts/reporter.js" daily 28
/cost-report monthly
Show last 30 days:
node "${CLAUDE_SKILL_DIR}/../../scripts/reporter.js" daily 30
/cost-report branch
Show cost per git branch (last 30 days):
node "${CLAUDE_SKILL_DIR}/../../scripts/reporter.js" branch 30
/cost-report branch <days>
Show branch costs for a custom period:
node "${CLAUDE_SKILL_DIR}/../../scripts/reporter.js" branch <DAYS>
Display Rules
- Show the ASCII output exactly as returned — do not reformat it
- The box-drawing characters are intentional, preserve them
- Add brief commentary only if there's a notable trend or budget concern
- If no data exists yet, tell the user that tracking starts automatically
- For branch reports, mention that branch tracking requires working in a git repo
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.
- 11d ago First seen · 56 lines · 63 tokens per session scan A ed43b6943b0d
cost-report is a skill published in the GitHub repository Manavarya09/cost-guardian (35 stars, last pushed 2mo ago), licensed MIT. It adds 63 tokens to every session and 440 once invoked, about $0.0003 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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