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 skills add caoyuan-fire/engi-foundry-skill --skill engifoundry-routergit clone --depth 1 https://github.com/caoyuan-fire/engi-foundry-skillWrote 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/caoyuan-fire/engi-foundry-skill/engifoundry-router)<a href="https://agentmods.dev/skills/caoyuan-fire/engi-foundry-skill/engifoundry-router"><img src="https://agentmods.dev/badge/skills/caoyuan-fire/engi-foundry-skill/engifoundry-router/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/caoyuan-fire/engi-foundry-skill/engifoundry-router"><img src="https://agentmods.dev/badge/skills/caoyuan-fire/engi-foundry-skill/engifoundry-router.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 | $0.00040 | $0.02991 |
| Opus 5 | $0.00020 | $0.01496 |
| Sonnet 5 | $0.00008 | $0.00598 |
| Haiku 4.5 | $0.00004 | $0.00299 |
Grade A, and why
engifoundry-router 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 11d 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 — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
EngiFoundry Router
Entry
When ./engifoundry.config.json exists, this Router must be loaded before runtime contract selection on every user turn. It remains in session context, and the Agent may reread it whenever useful. After a stage operation completes, the Agent may reread this Router against current records before selecting more contracts.
With a root configuration, read the configured Initialization record before applying runtime contracts. An Init interaction already active in the current conversation continues under the Init Lock. When initialization is complete, new actionable engineering work materially related to the current project uses the state signals below whether or not the user names EngiFoundry; Audit's Project Relevance boundary defines that applicability, and its classification rules select inline, direct, or package.
The current working directory alone does not make a request current-project work. A request targeting another project or having no material relationship to this project remains ordinary work without current-project runtime contracts or PAK allocation, unless the user explicitly asks to manage it through this project's EngiFoundry runtime.
When the root configuration is absent, Entry loads this Router only for an explicit request to use EngiFoundry for actionable engineering work. When a root configuration exists but initialization is not complete, an equivalent explicit request may also use the fallback below; a request to continue or complete initialization reads Init instead. In either incomplete case, a request that does not explicitly ask to use EngiFoundry proceeds normally and is not captured by the incomplete runtime.
Unconfigured Fallback
For an explicit actionable EngiFoundry request without complete Initialization, do not require or silently perform Init. The Agent may concisely suggest initialization for project preferences, Package planning, Executor delegation, or configured automation, then continues the current request without waiting for that choice.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 114 lines · 40 tokens per session scan A 79974bd3b53a
engifoundry-router is a skill published in the GitHub repository caoyuan-fire/engi-foundry-skill (2 stars, last pushed 17d ago), licensed Apache-2.0. It adds 40 tokens to every session and 2,991 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 2026-08-31.
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