Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/litestar-org/litestar-skillsnpx agentmods add skills/litestar-org/litestar-skills/advanced-alchemyWrote 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/litestar-org/litestar-skills/advanced-alchemy)<a href="https://agentmods.dev/skills/litestar-org/litestar-skills/advanced-alchemy"><img src="https://agentmods.dev/badge/skills/litestar-org/litestar-skills/advanced-alchemy/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/litestar-org/litestar-skills/advanced-alchemy"><img src="https://agentmods.dev/badge/skills/litestar-org/litestar-skills/advanced-alchemy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00048 | $0.04363 |
| Opus 5.5 | $0.00019 | $0.01745 |
| Sonnet 5.5 | $0.00010 | $0.00873 |
| Haiku 4.5 | $0.00005 | $0.00436 |
Grade A, and why
advanced-alchemy 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 7d 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 — 292 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Advanced Alchemy
Code Style Rules
- Use
Mapped[...]for columns andT | Nonefor optional fields. - Keep business transformations in service lifecycle hooks.
- Prefer the inner
Reposervice pattern andadvanced_alchemy.*imports. - Use
from __future__ import annotationswhen it matches the project; 1.12 supports it in model modules.
Match-Your-Framework — read first
advanced-alchemy ships first-party extensions for five web frameworks. If your project uses one of these, jump directly to the matching integration guide and skip the others:
- Litestar —
SQLAlchemyPluginwith full DI, session store, CLI. The rest of this SKILL.md covers Litestar by default; also seereferences/litestar_plugin.md. - FastAPI →
references/fastapi-integration.md—AdvancedAlchemy(config=..., app=app),Depends(alchemy.provide_session())DI,provide_service()/provide_filters(), Alembic CLI viaassign_cli_group. - Flask →
references/flask-integration.md—AdvancedAlchemy(config=..., app=app)orinit_app()factory, pull-basedalchemy.get_sync_session(), async-via-portal. - Sanic →
references/sanic-integration.md—AdvancedAlchemy(sqlalchemy_config=..., sanic_app=app)(note:sqlalchemy_config=kwarg, notconfig=), sanic-ext DI,request.ctxsessions. - Starlette →
references/starlette-integration.md—AdvancedAlchemy(config=..., app=app),request.statesession access, lifespan wrapping.
Transaction configuration is framework-specific. Litestar uses
before_send_handler; FastAPI, Flask, Starlette, and Sanic use
commit_mode="manual", "autocommit", or
"autocommit_include_redirect". Read the matching framework guide, then
references/commit-modes.md and
references/multi-database.md.
What ships with it
19 files 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.
- references/bases.md 15 KB
- references/caching.md 9.0 KB
- references/commit-modes.md 6.0 KB
- references/fastapi-integration.md 17 KB
- references/filters.md 17 KB
- references/flask-integration.md 16 KB
- references/frameworks.md 11 KB
- references/litestar_plugin.md 18 KB
- references/migrations.md 7.8 KB
- references/models.md 13 KB
- references/multi-database.md 8.2 KB
- references/operations.md 9.4 KB
- references/replicas.md 10 KB
- references/repositories.md 9.0 KB
- references/sanic-integration.md 11 KB
- references/services.md 16 KB
- references/starlette-integration.md 10 KB
- references/storage.md 11 KB
- references/types.md 14 KB
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.
- 7d ago Changed 8c5810e5dd66
- 23d ago Changed · +5 lines e73bc3533902
- 1mo ago Changed · +4 lines · -6 tokens per session 163279b643a3
- 1mo ago First seen · 283 lines · 54 tokens per session scan A 3f5c118a8f10
advanced-alchemy is a skill published in the GitHub repository litestar-org/litestar-skills (16 stars, last pushed yesterday), licensed MIT. It adds 48 tokens to every session and 4,363 once invoked, about $0.0002 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 2026-08-30.
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