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/token-cost-optimizernpx skills add drvoss/everything-copilot-cli --skill token-cost-optimizergit clone --depth 1 https://github.com/drvoss/everything-copilot-cliWhat 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 | $0.00042 | $0.01316 |
| Opus 5 | $0.00021 | $0.00658 |
| Sonnet 5 | $0.00008 | $0.00263 |
| Haiku 4.5 | $0.00004 | $0.00132 |
Grade A, and why
token-cost-optimizer 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 2d 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 — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Token Cost Optimizer
Token Cost Optimizer is a proactive cost-control skill for GitHub Copilot. It helps you reduce metered usage before and during a task by choosing the right model path, cutting unnecessary context, and avoiding parallel work that burns credits without enough payoff.
Why This is Copilot-Exclusive
GitHub Copilot now exposes cost-sensitive control surfaces that matter directly in the CLI:
- Model pricing for token-based usage across Copilot models
- Premium request multipliers that vary by model and feature surface
This skill focuses on Copilot-native levers such as /model, Auto model selection, /compact,
/context, autopilot, and /fleet rather than generic LLM budgeting advice.
When to Use
- Before launching a large Copilot CLI task that may scan many files or run for a long time
- Before using
/fleetor autonomous modes where model and context choices can multiply spend - When you need to stay inside a budget or monthly AI credit allowance
- When you want to trade a small quality reduction for a large cost reduction on routine work
When NOT to Use
| Instead of token-cost-optimizer | Use |
|---|---|
| You are auditing historical spend after the fact | workflow/cost-audit |
| The task is tiny and the model choice is obvious | do the task directly |
| You need to choose execution mode before cost strategy | task-intake-router |
Cost Drivers
The main Copilot cost drivers are:
- Model selection — more capable models generally cost more
- Context size — wider scans and larger prompts increase token use
- Parallel agent count —
/fleetcan multiply model interactions - Autonomous depth — long autopilot runs can continue consuming usage while you are not intervening
Workflow
1. Estimate the task shape first
Ask:
- how many files must be read?
- does the work need a premium model?
- is the task truly parallelizable?
- can the context be narrowed before starting?
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.
- 2d ago First seen · 159 lines · 42 tokens per session scan A 6a4f92f4c21c
token-cost-optimizer is a skill published in the GitHub repository drvoss/everything-copilot-cli (45 stars, last pushed 6d ago), licensed MIT. It adds 42 tokens to every session and 1,316 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 2026-08-30.
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