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.
git clone --depth 1 https://github.com/jonafrank/cursor-multi-model-configWrote 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/rules/jonafrank/cursor-multi-model-config/02-reasoning)<a href="https://agentmods.dev/rules/jonafrank/cursor-multi-model-config/02-reasoning"><img src="https://agentmods.dev/badge/rules/jonafrank/cursor-multi-model-config/02-reasoning/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/rules/jonafrank/cursor-multi-model-config/02-reasoning"><img src="https://agentmods.dev/badge/rules/jonafrank/cursor-multi-model-config/02-reasoning.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 | $0.00013 | $0.00288 |
| Opus 5.5 | $0.00005 | $0.00115 |
| Sonnet 5.5 | $0.00003 | $0.00058 |
| Haiku 4.5 | $0.00001 | $0.00029 |
Grade A, and why
02-reasoning 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 2mo 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
Reasoning Mode
This rule activates for tasks requiring deep analysis and logical reasoning.
When This Applies
- Debugging complex issues
- Understanding why code behaves a certain way
- Analyzing performance problems
- Tracing through execution flows
- Evaluating security implications
Model Recommendation
Check .cursor/model-profiles/current-profile.json for the reasoning model.
Typical models for reasoning:
claude-4.5-opus-high(completeness/default profile)claude-4.5-haiku(cost_minimized/fallback profile)
Reasoning Guidelines
- Gather context: Read relevant code before drawing conclusions
- Form hypotheses: Consider multiple possible explanations
- Trace systematically: Follow execution paths step by step
- Validate assumptions: Check that premises are correct
- Explain clearly: Make the reasoning chain visible
Output Format
For reasoning tasks, structure your response as:
- Observation: What we're seeing
- Hypothesis: Possible explanations
- Analysis: Step-by-step investigation
- Conclusion: What we determined
- Solution: Recommended fix (if applicable)
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.
- 2mo ago First seen · 44 lines · 13 tokens per session scan A 4c669035166c
02-reasoning is a cursor rule published in the GitHub repository jonafrank/cursor-multi-model-config (5 stars, last pushed 10mo ago), licensed MIT. It adds 13 tokens to every session and 288 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-31.
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prefer-direct-imports-over-module-mocks
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config-validation-and-normalization
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control-plane-descriptors
Control plane descriptor and instance implementation patterns.