kernel-extension SKILL.md skillA
kernel-extension from tylerjrbuell/reactive-agents-ts is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add tylerjrbuell/reactive-agents-ts/kernel-extension@git:20260602.f5b2432Pins git:20260602.f5b2432 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- tylerjrbuell/reactive-agents-ts
- Path
.agents/skills/kernel-extension/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260602.f5b2432, committed Jun 2, 2026
- First version recorded
- Apr 10, 2026
- Size
- 8,108 bytes
- Repository stars
- 31
- License
- MIT
Add new behavior to the composable kernel — new Phase, Guard, MetaTool, or custom kernel variant. Use when extending agent reasoning, adding tool call filtering, or building a custom kernel for a new strategy.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Kernel Extension — Composable Phase Architecture
## Decision Tree: What Are You Adding?
```
Does it need to READ the LLM response and TRANSFORM kernel state per-turn?
YES → Phase
Does it need to BLOCK or MODIFY a specific tool call before execution?
YES → Guard
Does it need to INTERCEPT a specific named tool call and return a synthetic result?
YES → MetaTool entry in metaToolRegistry
Do you need a completely DIFFERENT phase pipeline for a new strategy?
YES → Custom Kernel via makeKernel({ phases: [...] })
```
When in doubt: Guards are simpler than Phases. Phases are simpler than custom kernels.
## Adding a Phase
### File location
`packages/reasoning/src/kernel/capabilities/<cap>/<name>.ts` (pick the capability that
fits: `reason/`, `act/`, `reflect/`, `verify/`, `attend/`, etc. The old
`strategies/kernel/phases/` tree was removed in the Stage-5 capability re-layout.)
### Exact type signature (no deviations)
```typescript
import { Effect } from "effect";
import { LLMService } from "@reactive-agents/llm-provider";
import { KernelState, KernelContext } from "../../state/kernel-state.js";
export const myPhase = (
state: KernelState,
context: KernelContext,
…Read the whole file at its exact version.
How to install
mdr add tylerjrbuell/reactive-agents-ts/kernel-extension@sha256:8c7f79868676f102The line at the top of this page pins the label git:20260602.f5b2432, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_5wg63wncj4zmvbgn)
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Versions
The registry has recorded 2 versions of this file, between Apr 10, 2026 and Jun 2, 2026, about one every 53 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260602.f5b2432 latest | 2026-06-02 | f5b2432 | 8,108 B | A | view · diff |
| git:20260410.f047b24 | 2026-04-10 | f047b24 | 7,546 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8108 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
tylerjrbuell/reactive-agents-ts · 31 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5wg63wncj4zmvbgn GET https://markdownregistry.com/api/v1/resolve?ref=tylerjrbuell/reactive-agents-ts/kernel-extension GET https://markdownregistry.com/api/v1/blob/8c7f79868676f1025345669ce36f78bc133704d8612e1808a623a2f595b471bc
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.