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Track session costs, set budget alerts, and optimize token spend. Use to check costs mid-session or set spending limits.
Passed 19 of 22 test cases with the skill, and 8 of 22 without it.
and 12 more in the full report
11 fixed8 passed either way3 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.
I'm doing a quick typo fix in a localized file. What total tool-call budget should be set, and at how many tool calls should wrap-up begin?
| Checked | Without skill | With skill |
|---|---|---|
| The response sets a tool-call budget limit of 20 calls. | Missed | Passed |
| The response recommends beginning wrap-up at 15 tool calls. | Missed | Passed |
The instructions your model reads when the skill loads.
Monitor and optimize Claude Code session costs.
Use when:
# Session cost is shown at the end of each session
# Mid-session: check the status bar or run /cost
| Operation | Relative Cost | Optimization |
|---|---|---|
| Large file reads | High | Use offset/limit params |
| Broad grep searches | Medium | Scope to specific dirs |
| Subagent spawning | High (new context) | Reuse agents via SendMessage |
| Repeated tool calls | Cumulative | Batch operations |
| MCP tool calls | Variable | Minimize round-trips |
| Model selection | 3-10x difference | Use haiku for simple tasks |
| Task | Typical Cost | Budget Alert |
|---|---|---|
| Bug fix | $0.10-0.50 | $1.00 |
| Feature (small) | $0.50-2.00 | $3.00 |
| Feature (large) | $2.00-8.00 | $10.00 |
| Refactor | $1.00-5.00 | $7.00 |
| Code review | $0.20-1.00 | $2.00 |
test cases passed, vs 8 / 22 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.