builder-api-reference SKILL.md skillA
builder-api-reference 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/builder-api-reference@v2.0Pins v2.0 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
apps/docs/skills/builder-api-reference/SKILL.md- Versions recorded
- 8
- Latest version
- v2.0, committed Nov 6, 2026
- First version recorded
- Apr 10, 2026
- Size
- 9,392 bytes
- Repository stars
- 31
- License
- MIT
Configure a ReactiveAgentBuilder with the correct layer composition for any agent use case.
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
# Builder API Reference
## Agent objective
Produce a complete, correctly-ordered builder chain with the right `.withX()` calls for the task. Every method used must exist in this reference.
## When to load this skill
- Before writing any agent builder chain
- When unsure which methods are available or what their params are
- When upgrading from an older API version
## Two syntaxes, one API
The declarative `createAgent(config)` front door and this fluent builder are the
same API — same key names, same nesting (`createAgent({ tools: { allowedTools } })`
≡ `.withTools({ allowedTools })`). Use `createAgent` for static definitions; the
builder for conditional/imperative construction or code-only escape hatches
(`.withHook`, `.withLayers`, `.compose`). This reference lists the fluent methods;
each maps to an `AgentConfig` key of the same name.
```ts
import { createAgent } from "@reactive-agents/runtime";
const agent = await createAgent({
name: "assistant",
provider: "anthropic",
reasoning: { defaultStrategy: "adaptive", maxIterations: 10 },
});
```
## Implementation baseline
```ts
import { ReactiveAgents } from "@reactive-agents/runtime";
…Read the whole file at its exact version.
How to install
mdr add tylerjrbuell/reactive-agents-ts/builder-api-reference@sha256:c45b3498dc6e4b06The line at the top of this page pins the label v2.0, 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_iaitab3cmmzbrigj)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 8 versions of this file, between Apr 10, 2026 and Nov 6, 2026, about one every 30 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0 latest | 2026-11-06 | 15d7b26 | 9,392 B | A | view · diff |
| v2.0 | 2026-11-06 | 56dcdcb | 9,100 B | A | view · diff |
| v2.0 | 2026-11-06 | 26647f2 | 8,542 B | A | view · diff |
| v2.0 | 2026-07-21 | 848f5ae | 8,357 B | A | view · diff |
| v2.0 | 2026-07-20 | 80337d2 | 8,319 B | A | view · diff |
| v2.0 | 2026-07-12 | 2f8f0ef | 8,538 B | A | view · diff |
| v2.0 | 2026-05-05 | dd544a6 | 7,833 B | A | view · diff |
| v2.0 | 2026-04-10 | a95c860 | 7,682 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 (9392 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_iaitab3cmmzbrigj GET https://markdownregistry.com/api/v1/resolve?ref=tylerjrbuell/reactive-agents-ts/builder-api-reference GET https://markdownregistry.com/api/v1/blob/c45b3498dc6e4b0693950421417b684e4e53cefff0b9c4e787415faba3ce45ca
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.