Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add ihudak/ihudak-claude-plugins/plugin install workflows-coreWrote 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/ihudak/ihudak-claude-plugins/model-routing)<a href="https://agentmods.dev/skills/ihudak/ihudak-claude-plugins/model-routing"><img src="https://agentmods.dev/badge/skills/ihudak/ihudak-claude-plugins/model-routing/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/ihudak/ihudak-claude-plugins/model-routing"><img src="https://agentmods.dev/badge/skills/ihudak/ihudak-claude-plugins/model-routing.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 | $0.00194 | $0.00315 |
| Opus 5.5 | $0.00078 | $0.00126 |
| Sonnet 5.5 | $0.00039 | $0.00063 |
| Haiku 4.5 | $0.00019 | $0.00032 |
Grade A, and why
model-routing 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 23d 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
Model routing
Read the authoritative classification rules and model fallback chain:
${CLAUDE_PLUGIN_ROOT}/references/model-routing/classification.md
Then classify the current task as exactly one of SIMPLE, MODERATE,
SIGNIFICANT, or HIGH-RISK using the criteria in that file, and apply the
model fallback chain and model_routing handoff block it defines. That file is
the single source of truth — do not paraphrase or cache its contents here.
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.
- 23d ago Changed · +4 tokens per session a7918f9017c9
- 28d ago Changed · +25 tokens per session 97f503179ea1
- 1mo ago Changed · +50 tokens per session 097cf867603b
- 1mo ago First seen · 18 lines · 115 tokens per session scan A d4f3c1441ead
model-routing is a skill published in the GitHub repository ihudak/ihudak-claude-plugins (2 stars, last pushed 24d ago), licensed MIT. It adds 194 tokens to every session and 315 once invoked, about $0.0008 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 2026-09-05.
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