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Skillslcs-prototype

lcs-prototype

Design & creation

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Updated 10-16 00:22

About this skill

LCS Prototype Skill

Shared Coding Contract: Refer to ../lcs-shared/contract.md for folder conventions, Handoff format, and token optimization.

Purpose: Build throwaway code to answer a specific design question.

Chain of Truth Level: Strict

OKF Frontmatter & Writing Safety

When creating artifacts, include YAML frontmatter following the schema in ../lcs-shared/contract.md. Follow Artifact Writing Safety rules: generate content first, write one file, verify, stop on failure.

Trigger

Activate when user wants to: validate an approach, build a proof of concept, test a design question, or create throwaway code.

Behavior Checklist

  1. Pick the branch:

    • "Does the logic/state model feel right?" → LOGIC branch: Single HTML file with state panel and free-play buttons.
    • "What will it look like?" → UI branch: Multiple variations switchable via URL params.

  2. Rules:

    • Throwaway by day one. Trivial to run. No persistence by default.
    • Skip polish (no tests, no abstractions).
    • Surface state after every action.

  3. Create prototype in .lcs/work-items/{ts}-{slug}/prototype/.

  4. Capture the decision: Once validated, fold the decision into real code/spec. Archive the prototype code as a throwaway git branch. Leave a context pointer in the PRD/SRS.

  5. End with Handoff to lcs-toprd or lcs-tosrs.

Output

  • .lcs/work-items/{ts}-{slug}/prototype/ — isolated throwaway prototype

Chain of Truth Report

Level

Strict

Sources Checked

  • .lcs/state.md
  • <PRD/explore sections being validated>

Assumptions

  • <label each [verified] or [unverified]>

Actions Taken

  • <Prototype built, branch picked (LOGIC/UI), validation run>

Verification

  • <Prototype ran successfully; decision captured and folded back>

Report

<Explicit pass/fail on the design question being validated>

Handoff

Next recommended skill: lcs-toprd or lcs-tosrs Next file to read: .lcs/work-items/{ts}-{slug}/prototype/ Current phase: prototype Current confidence: <low/medium/high> Blocking questions: Risks to carry forward: Source of Truth Bundle: .lcs/state.md, prototype/ output Must Preserve IDs: <SRC/FR/AC IDs touched by the prototype> Unresolved IDs: Suggested next command: Fold prototype decision ke PRD/SRS

Chain of Truth Level

Level: Strict

This skill follows the LCS Chain of Truth protocol at the declared level.