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 rules/syntaxarc/archipy-plugin/using-archipy-modelsgit clone --depth 1 https://github.com/SyntaxArc/archipy-pluginWhat 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 | $0.00000 | $0.00447 |
| Opus 5 | $0.00000 | $0.00224 |
| Sonnet 5 | $0.00000 | $0.00089 |
| Haiku 4.5 | $0.00000 | $0.00045 |
Grade A, and why
using-archipy-models 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 yesterday.
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
Using ArchiPy Models
Data structures only — no I/O, no business rules.
Live: https://syntaxarc.github.io/ArchiPy/getting-started/project_structure/
Layout
models/
├── entities/ # SQLAlchemy BaseEntity subclasses
├── errors/ # Domain errors extending ArchiPy BaseError hierarchy
├── types/ # Optional enums / aliases
└── dtos/{domain}/
├── domain/v{n}/ # Versioned — cross service boundary
└── repository/ # Internal — never versioned
DTO Naming
| Kind | Pattern | Example |
|---|---|---|
| Domain input | {Op}InputDTO |
UserRegistrationInputDTO |
| Domain output | {Op}OutputDTO |
UserRegistrationOutputDTO |
| Repository command | {Action}CommandDTO |
CreateUserCommandDTO |
| Repository query | {Action}QueryDTO |
GetUserByIdQueryDTO |
| Repository response | {Domain}ResponseDTO |
UserResponseDTO |
DTOs use Pydantic BaseModel. Prefer ArchiPy base entities where applicable.
Errors
- Subclass ArchiPy errors from
archipy.models.errors(e.g.AlreadyExistsError,NotFoundError). - Raise with context:
raise NotFoundError(...) from e. - Never raise bare
Exceptionfor domain failures. - With
AppUtils.create_fastapi_appexception handlers, ArchiPy errors map to HTTP status automatically — see https://syntaxarc.github.io/ArchiPy/tutorials/error_handling/
Do Not
- Put adapters, DB sessions, or HTTP/gRPC types in models.
- Version repository DTOs.
- Import repositories, logics, or services from models.
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.
- yesterday First seen · 49 lines · 447 tokens per session scan A 6a960b6599d7
using-archipy-models is a cursor rule published in the GitHub repository SyntaxArc/archipy-plugin (2 stars, last pushed 8d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 447 tokens. 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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