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/drvoss/everything-copilot-cli/cost-auditnpx skills add drvoss/everything-copilot-cli --skill cost-auditgit clone --depth 1 https://github.com/drvoss/everything-copilot-cliWrote 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/drvoss/everything-copilot-cli/cost-audit)<a href="https://agentmods.dev/skills/drvoss/everything-copilot-cli/cost-audit"><img src="https://agentmods.dev/badge/skills/drvoss/everything-copilot-cli/cost-audit.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 | $0.00040 | $0.01143 |
| Opus 5 | $0.00020 | $0.00571 |
| Sonnet 5 | $0.00008 | $0.00229 |
| Haiku 4.5 | $0.00004 | $0.00114 |
Grade A, and why
cost-audit 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 yesterday.
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 — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cost Audit
Audit AI inference costs and optimize token usage across multi-model pipelines. This is not about cutting capabilities — it is about eliminating waste, right-sizing models, and keeping costs predictable.
When to Use
- AI API costs growing faster than usage justifies
- Unsure whether you are using the right model tier for each task
- Want to compare cost-quality trade-offs before committing to a model
- Preparing for production traffic and need a cost baseline
- Running fleet mode or parallel agents and want to avoid runaway spend
Model Cost Tiers
Use the most capable model necessary — not the most capable model available.
| Tier | Models | Best for |
|---|---|---|
| Premium | claude-opus-4.7, claude-opus-4.6, claude-opus-4.5 |
Architecture decisions, complex multi-file reasoning, security audits |
| Standard | claude-sonnet-4.6, claude-sonnet-4.5, gpt-5.2 |
Most coding tasks, code review, test generation, documentation |
| Fast / Cheap | claude-haiku-4.5, gpt-5-mini, gpt-4.1 |
File edits, boilerplate, classification, triage, simple summaries |
Workflow
1. Identify high-cost call sites
Scan for:
- Long system prompts that repeat across calls
- Premium models used for simple transforms
- Entire file contents passed when only relevant sections are needed
- No context caching on static instructions
- Fleet mode with all agents on premium tiers
2. Measure baseline
| Metric | How to measure |
|---|---|
| Total tokens / task | Compare before and after context changes |
| Model mix | Tally which models are called per workflow |
| Prompt size distribution | Log avg/max token counts per call type |
3. Apply reduction patterns
Model downgrade
- Does this task require premium reasoning? If not, drop a tier.
- Classification, routing, simple edits → use fast/cheap tier
- Reserve premium for tasks that demonstrably need it
Context pruning
- Pass a summary instead of the full history when prior turns are less relevant
- Slice file ranges with
view_rangeinstead of full-file reads - Remove redundant boilerplate from system prompts
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.
- yesterday First seen · 134 lines · 40 tokens per session scan A b870d8c6b06b
cost-audit is a skill published in the GitHub repository drvoss/everything-copilot-cli (45 stars, last pushed 8d ago), licensed MIT. It adds 40 tokens to every session and 1,143 once invoked, about $0.0002 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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