executor-design

A small set of design guidance for combining executor prompts, which are instructions that tell an agent how to carry out work.

In plain words
What is it for?
Use it when implementing scoped work that needs combined executor-prompt guidance.
Why use it?
The description does not provide enough detail to explain what specific design decisions or tasks it supports.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/yeachan-heo/gajae-code/executor-design
Any agent
npx skills add Yeachan-Heo/gajae-code --skill executor-design
Clone the repo
git clone --depth 1 https://github.com/Yeachan-Heo/gajae-code

Made for: Claude Code, Codex.

Per session 12 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 45 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00012 $0.00045
Opus 5 $0.00006 $0.00023
Sonnet 5 $0.00002 $0.00009
Haiku 4.5 $0.00001 $0.00005

Measured 3d ago against content hash 4fd28cf18c4b, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

executor-design 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 3d 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.

packages/coding-agent/test/fixtures/gjc-plugins/combined-pack/subskills/executor-design/SKILL.md · 9 lines

What it actually says

Use the combined design pack constraints while implementing scoped executor work.

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. 3d ago First seen · 9 lines · 12 tokens per session scan A 4fd28cf18c4b

Subscribe to this mod's changes

executor-design is a skill published in the GitHub repository Yeachan-Heo/gajae-code (2,691 stars, last pushed today), licensed MIT. It adds 12 tokens to every session and 45 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 2026-08-30.