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gemini-3-prompting

100 / 100 · Low risk

Fine to try.

By tamarillo-ai/theta (GitHub) · other · 15 stars · scanned at commit 08c084f

Apply when creating or editing prompts targeting Gemini 3. Covers prompt layering (system instruction + context + task), thinking_level tuning, structured output prompting, function calling guidance, grounding prompt wording, few-shot examples, long-context patterns, persona/constraint alignment, prompt decomposition, agentic workflows, and migration from Gemini 2.5.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'gemini-3-prompting' ] || [ -L ~/.agents/skills/'gemini-3-prompting' ]; then echo 'A skill folder named gemini-3-prompting already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/tamarillo-ai/theta' "$d" && git -C "$d" checkout --quiet '08c084f718b2b842cd53622ce0b1a1fb2888ccef' -- 'test/cast-fixtures/codex-cli/regression/just-works/.codex/skills/gemini-3-prompting' && mkdir -p ~/.agents/skills && cp -R "$d"/'test/cast-fixtures/codex-cli/regression/just-works/.codex/skills/gemini-3-prompting' ~/.agents/skills/'gemini-3-prompting' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'gemini-3-prompting' ~/.claude/skills/'gemini-3-prompting' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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