Skill

mb-skill-concept

Generate N concept variations of a site / asset on localhost in parallel, foreground subagents. Default 2. Operator picks one to publish. Used by /mb-site as the concept-generation step.

npx claudepluginhub noontide-co/mainbranch

Tool Access

This skill uses the workspace's default tool permissions.

Preview

A composable skill for generating concept variations. /mb-site calls this after the brief is locked, before the first publish.

SKILL.md

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bopen-tools

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Last CommitMay 5, 2026

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skill-concept

A composable skill for generating concept variations. /mb-site calls this after the brief is locked, before the first publish.

Inputs

The locked brief (path provided in the user message)

Reference URLs (taste anchors, not templates)

Conversion endpoint config (.mainbranch/conversion.json)

Outputs

N localhost-runnable HTML variations, each in its own subdir of the project repo (e.g., concepts/v1/, concepts/v2/)

A short comparison summary for the operator: hero artifact, palette, voice variant for each

Operator picks one; that variation is promoted to the project root

Flow

Spawn N foreground subagents (default 2). Each gets the same brief + reference URLs but is asked to make different decisions.

Each subagent writes its variation. Foreground only — background writes are known to silently fail.

Validate each variation: footer present, OG.svg under 1200×630, no AI tells in the copy.

Render preview. python3 -m http.server from each subdir; open in browser.

Operator picks. One concept → promoted to repo root; others archived under concepts/.

Foreground rule

Subagents MUST be foreground. The known background-subagent file-write bug means files appear written but don't persist. Foreground only. See references/concept-variations.md for the spawn pattern.

Cross-references

skill-concept

A composable skill for generating concept variations. /mb-site calls this after the brief is locked, before the first publish.

Inputs

The locked brief (path provided in the user message)
Reference URLs (taste anchors, not templates)
Conversion endpoint config (.mainbranch/conversion.json)

Outputs

N localhost-runnable HTML variations, each in its own subdir of the project repo (e.g., concepts/v1/, concepts/v2/)
A short comparison summary for the operator: hero artifact, palette, voice variant for each
Operator picks one; that variation is promoted to the project root

Flow

Spawn N foreground subagents (default 2). Each gets the same brief + reference URLs but is asked to make different decisions.
Each subagent writes its variation. Foreground only — background writes are known to silently fail.
Validate each variation: footer present, OG.svg under 1200×630, no AI tells in the copy.
Render preview. python3 -m http.server from each subdir; open in browser.
Operator picks. One concept → promoted to repo root; others archived under concepts/.

Foreground rule

Subagents MUST be foreground. The known background-subagent file-write bug means files appear written but don't persist. Foreground only. See references/concept-variations.md for the spawn pattern.