block-selection SKILL.md skillA

block-selection from drayline/rootnode-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add drayline/rootnode-skills/block-selection@v6.0.0

Pins v6.0.0 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
drayline/rootnode-skills
Path
plugins/rootnode-prompts/skills/block-selection/SKILL.md
Versions recorded
2
Latest version
v6.0.0, committed Nov 3, 2026
First version recorded
Nov 1, 2026
Size
20,606 bytes
Repository stars
40
License
a license file GitHub does not identify

Guides selection of identity, reasoning, and output approaches for Claude prompts based on task characteristics. Trigger on: "help me choose an approach," "which approach fits this task," "recommend a prompt pattern," "compare reasoning methods," "map this task to the right approach," "what combination of approaches," "which identity fits," "which reasoning method." Also trigger on symptom-phrased: "my prompt feels generic," "I don't know which approach to use," "my output lacks domain depth.…

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

# Approach Selection for Claude Prompts

> **Calibration:** Tier 2 (Sonnet-graceful) — designed against Opus 5.5 + Sonnet 5.5 dual-primary. Runs on Haiku 5.5 at `high` effort with less depth on multi-dimensional analysis; fallback-graceful on Opus 5 / Sonnet 5; legacy-graceful on Sonnet 4.6. Start at the model's default effort (`medium` on Opus 5.5 and Sonnet 5.5 in Claude Code; `high` for Sonnet 5.5 on the Claude API) and re-run an effort sweep on your own evals rather than carrying a setting over. See repository README for model compatibility.

This Skill provides the decision logic for choosing the right identity, reasoning method, and output format when building a Claude prompt. Given a task description, it maps task characteristics to the best-fit approach in each category.

## When to Use This Skill

Use this when you need to decide:
- Which identity (role) fits a task
- Which reasoning method produces the best analytical depth for the task shape
- Which output format matches the deliverable
- When to combine approaches across categories
- When core approaches are sufficient vs. when domain-specific approaches add value
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add drayline/rootnode-skills/block-selection@sha256:a50af6f9ee1fc783

The line at the top of this page pins the label v6.0.0, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_y5o7ppnw5tmhhmi4.svg)](https://markdownregistry.com/a/art_y5o7ppnw5tmhhmi4)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 2 versions of this file, between Nov 1, 2026 and Nov 3, 2026, about one every 2 days.

versioncommittedcommitsizeaudit
v6.0.0 latest2026-11-03 7bd17b8 20,606 BA view · diff
v5.0.02026-11-01 f34b7ac 20,557 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (20606 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

GitHub

drayline/rootnode-skills · 40 stars · license a license file GitHub does not identify · pushed 2026-11-03 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_y5o7ppnw5tmhhmi4
GET https://markdownregistry.com/api/v1/resolve?ref=drayline/rootnode-skills/block-selection
GET https://markdownregistry.com/api/v1/blob/a50af6f9ee1fc783256e6e125c0290d788a5d0500c76a2393fba51f917bf01f8

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.

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