Universal NL Programming Conventions

The cross-tool floor for all artifact schemas. Use this skill when scoring or writing any NL programming artifact regardless of which tool (Claude Code / Codex CLI / Antigravity) it targets.

Tool-specific overlays load on top of this universal floor:

• nlpm:conventions-claude — Claude Code artifacts (.claude/, plugin.json, etc.)
• nlpm:conventions-codex — Codex CLI artifacts (.codex/, .agents/, AGENTS.md)
• nlpm:conventions-antigravity — Antigravity (and legacy Gemini CLI) artifacts (.gemini/, .agent/)

The scorer loads the matching overlay per tier classification — see agents/scorer.md step 3.

Design rationale: analysis/multi-tool-design-2026-05.md.

1. SKILL.md — Cross-Tool Open Standard

SKILL.md is the Agent Skills open spec, stewarded by the Agentic AI Foundation under the Linux Foundation. Anthropic published the spec on 2025-12-18; OpenAI, Microsoft, Google adopted within 48 hours. By 2026-03, 32+ tools read the same SKILL.md format (Claude Code, Codex, Gemini CLI / Antigravity, Cursor, Kiro, Continue, etc.).