summon

summon is a skill for Claude Code from gaia-research/gaia-skill-heaven. It costs 23 tokens per session (885 once invoked), scanned A, original, no licence file.

A way to bring the best-matching available skill into a work session for a specific capability gap.

In plain words
What is it for?
Use it to explicitly call in a suitable skill for a concrete task.
Why use it?
It helps when the current session lacks a needed skill but installing one is unnecessary.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Part of the skill-heaven plugin — 5 skills, 5 commands, 1 MCP server shipped together

Good fit Use it to explicitly call in a suitable skill for a concrete task.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gaia-research/gaia-skill-heaven/summon
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add gaia-research/gaia-skill-heaven --skill summon
Clone the repo
git clone --depth 1 https://github.com/gaia-research/gaia-skill-heaven

Made for: Claude Code.

Or install skill-heaven, the plugin that ships this one along with the rest of its 5 skills, 5 commands, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for summon

README.md
[![agentmods](https://agentmods.dev/badge/skills/gaia-research/gaia-skill-heaven/summon/github.svg)](https://agentmods.dev/skills/gaia-research/gaia-skill-heaven/summon)
Your own site
<a href="https://agentmods.dev/skills/gaia-research/gaia-skill-heaven/summon"><img src="https://agentmods.dev/badge/skills/gaia-research/gaia-skill-heaven/summon/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for summon

Your own site · 80×15
<a href="https://agentmods.dev/skills/gaia-research/gaia-skill-heaven/summon"><img src="https://agentmods.dev/badge/skills/gaia-research/gaia-skill-heaven/summon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 885 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00023 $0.00885
Opus 5 $0.00012 $0.00443
Sonnet 5 $0.00005 $0.00177
Haiku 4.5 $0.00002 $0.00089

Measured 2d ago against content hash 9861b5efd3cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

summon scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/skill-heaven/skills/summon/SKILL.md · 48 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago Changed · +19 lines 9861b5efd3cc
  2. 11d ago First seen · 29 lines · 23 tokens per session scan A 6d08375ed852

Subscribe to this mod's changes

summon is a skill published in the GitHub repository gaia-research/gaia-skill-heaven (4 stars, last pushed yesterday), with no licence file. It adds 23 tokens to every session and 885 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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