What is AspectGenerator?

A C# build-time tool that adds method interception by changing visible calls while the project is compiled. It requires the .NET 10 SDK/compiler to build.

Use it to apply C# method aspects, such as interception logic, in projects whose builds use the required compiler.

It can add behavior around method calls without runtime proxies or changing the compiled program afterward.

AspectGenerator — Skill for Claude Code and Codex by igor-tkachev

Install

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.

Any agent

npx skills add igor-tkachev/AspectGenerator --skill aspectgenerator

Clone the repo

git clone --depth 1 https://github.com/igor-tkachev/AspectGenerator

Made for: Claude Code, Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/igor-tkachev/aspectgenerator/aspectgenerator/github.svg)](https://agentmods.dev/skills/igor-tkachev/aspectgenerator/aspectgenerator)

Your own site

<a href="https://agentmods.dev/skills/igor-tkachev/aspectgenerator/aspectgenerator"><img src="https://agentmods.dev/badge/skills/igor-tkachev/aspectgenerator/aspectgenerator/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/igor-tkachev/aspectgenerator/aspectgenerator"><img src="https://agentmods.dev/badge/skills/igor-tkachev/aspectgenerator/aspectgenerator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,270 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00000	$0.03270
Opus 5.5	$0.00000	$0.01308
Sonnet 5.5	$0.00000	$0.00654
Haiku 4.5	$0.00000	$0.00327

Measured 1mo ago against content hash 40159272ed47, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

AspectGenerator 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 1mo 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.

SKILL.md · 434 lines

How it starts

The opening of the file, as written. The whole thing — 434 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AspectGenerator Agent Skill

Use this file as the compact agent-oriented guide for using and reviewing AspectGenerator in consuming projects.

AspectGenerator provides AOP-like compile-time method aspects for C# by rewriting visible call sites with C# interceptors. It is not runtime AOP, does not use runtime proxies, and does not weave IL.

Build-tool requirement

AspectGenerator requires projects that use it to be built with the .NET 10 SDK/compiler.

This is a build-toolchain requirement, not necessarily the same thing as the project target framework requirement. The important part is the SDK/compiler used by dotnet build, MSBuild, or Visual Studio. AspectGenerator itself targets netstandard2.0; consuming projects need the .NET 10 compiler because the generator uses the stable Roslyn interceptor API based on opaque InterceptableLocation data.

Do not describe this as simply "requires .NET 10". Say "requires the .NET 10 SDK/compiler to build".

The legacy preview API InterceptsLocation(filePath, line, character) is not supported.

Package reference rule

AspectGenerator runs in the compilation that references the NuGet package.

Every project whose call sites should be intercepted must reference AspectGenerator directly. A shared aspect library may define aspect attributes and hooks, but applications or libraries containing the actual call sites must also reference AspectGenerator directly.

Use this rule when reviewing multi-project solutions:

aspect definitions live in one project
call sites live in another project
=> both projects usually need direct AspectGenerator package references

The package imports the required MSBuild wiring automatically for direct package consumers.

Generated API ownership

AspectGenerator can generate the authoring/runtime API into the current compilation:

AspectAttribute
AspectInstanceLifetime
InterceptInfo
InterceptInfo<T>
InterceptData<T>
InterceptType
InterceptResult
Void
AspectGeneratorOptionsAttribute
AspectDiagnosticSeverity

Read the full file on GitHub · 434 lines

Files

What ships with it

20 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.

Changes

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.

1mo ago First seen · 434 lines · 0 tokens per session scan A 40159272ed47

Subscribe to this mod's changes

AspectGenerator is a skill published in the GitHub repository igor-tkachev/AspectGenerator (11 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 3,270 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 2026-08-30.

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