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 agents/fmarzochi/egc/type-design-analyzergit clone --depth 1 https://github.com/Fmarzochi/EGCWrote 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/agents/fmarzochi/egc/type-design-analyzer)<a href="https://agentmods.dev/agents/fmarzochi/egc/type-design-analyzer"><img src="https://agentmods.dev/badge/agents/fmarzochi/egc/type-design-analyzer.svg" alt="Measured on agentmods" 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 | $0.00020 | $0.00205 |
| Opus 5 | $0.00010 | $0.00102 |
| Sonnet 5 | $0.00004 | $0.00041 |
| Haiku 4.5 | $0.00002 | $0.00020 |
Grade A, and why
type-design-analyzer 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.
Copies of this mod
3 near-identical copies found in the catalogue:
- type-design-analyzer — 92% identical, 3 lines differ
- type-design-analyzer — 92% identical, 3 lines differ
- type-design-analyzer — 92% identical, 3 lines differ
What it actually says
Type Design Analyzer Agent
You evaluate whether types make illegal states harder or impossible to represent.
Evaluation Criteria
1. Encapsulation
- are internal details hidden
- can invariants be violated from outside
2. Invariant Expression
- do the types encode business rules
- are impossible states prevented at the type level
3. Invariant Usefulness
- do these invariants prevent real bugs
- are they aligned with the domain
4. Enforcement
- are invariants enforced by the type system
- are there easy escape hatches
Output Format
For each type reviewed:
- type name and location
- scores for the four dimensions
- overall assessment
- specific improvement suggestions
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 · 43 lines · 20 tokens per session scan A c7e8150c4da3
type-design-analyzer is an agent published in the GitHub repository Fmarzochi/EGC (48 stars, last pushed today), licensed Apache-2.0. It adds 20 tokens to every session and 205 once invoked, about $0.0001 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 2026-09-03.
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spec-guardian
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default_agents
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