command-authoring

command-authoring is a skill for Claude Code, Codex from terrene-foundation/kailash-coc-claude-py. It costs 39 tokens per session (3,278 once invoked), scanned A, original, Apache-2.0.

A reference for creating and checking slash commands used with Claude Code, Codex, and Gemini. It covers their file format, length, wording, and how commands differ from other agent configuration files.

In plain words
What is it for?
Use it to write a new slash command or audit an existing one for structure, wording, size limits, and cross-tool compatibility.
Why use it?
It helps keep commands short, consistent, and compatible across coding tools. It also helps decide whether a task belongs in a command, an agent, or a skill.

Skill for Claude CodeCodex

Written for Claude Code and Codex: $ARGUMENTS substitution, but also runs codex exec. Also seen: reads .claude/ paths; mentions subagents; names the TodoWrite tool.

Good fit Use it to write a new slash command or audit an existing one for structure, wording, size limits, and cross-tool compatibility.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/terrene-foundation/kailash-coc-claude-py/command-authoring
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 terrene-foundation/kailash-coc-claude-py --skill command-authoring
Clone the repo
git clone --depth 1 https://github.com/terrene-foundation/kailash-coc-claude-py

Made for: Claude Code, Codex.

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 command-authoring

README.md
[![agentmods](https://agentmods.dev/badge/skills/terrene-foundation/kailash-coc-claude-py/command-authoring/github.svg)](https://agentmods.dev/skills/terrene-foundation/kailash-coc-claude-py/command-authoring)
Your own site
<a href="https://agentmods.dev/skills/terrene-foundation/kailash-coc-claude-py/command-authoring"><img src="https://agentmods.dev/badge/skills/terrene-foundation/kailash-coc-claude-py/command-authoring/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 command-authoring

Your own site · 80×15
<a href="https://agentmods.dev/skills/terrene-foundation/kailash-coc-claude-py/command-authoring"><img src="https://agentmods.dev/badge/skills/terrene-foundation/kailash-coc-claude-py/command-authoring.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,278 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 6 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Prompt Injection · line 20
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 22
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 24
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 26
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 28
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
  • medium Prompt Injection · line 32
    Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.
    Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be
How audits are shown
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 5.1 $0.00039 $0.03278
Opus 5 $0.00019 $0.01639
Sonnet 5 $0.00008 $0.00656
Haiku 4.5 $0.00004 $0.00328

Measured 9d ago against content hash 98faf9678bc3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

command-authoring 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 9d 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.

.claude/skills/command-authoring/SKILL.md · 245 lines

How it starts

The opening of the file, as written. The whole thing — 245 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Command Authoring

Reference for authoring and auditing slash commands across CC, Codex, and Gemini. Commands are L4 (Instructions) artifacts in the COC 5-layer architecture per rules/cc-artifacts.md — distinct from agents (L1 Intent), skills (L2 Context), and rules (L3 Guardrails). They inject as user-message prompts at invocation; every line competes with actual user intent for context.

When To Use

Authoring a new slash command. Auditing an existing command for line cap, neutral phrasing, native-primitive carve-out drift, or cross-CLI parity. Deciding whether work belongs in a command (procedure invoked by name) versus an agent (specialist judgment + tools) or a skill (reference looked up on demand).

Quick Reference

CLI On-disk path Format Slash invocation Frontmatter shape
CC .claude/commands/<name>.md Markdown /<name> YAML: name: + description: + optional argument-hint: / allowed-tools:
Codex .codex/prompts/<name>.md Markdown bin/coc <name> "<prompt>" (deprecated upstream: /prompts:<name> is no longer loaded by Codex CLI 0.128+ — bin/coc dispatcher is canonical) Same YAML, preserved from source
Gemini .gemini/commands/<name>.toml TOML /<name> name, description, prompt = '''…''', optional tools = [...]

Read the full file on GitHub · 245 lines

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. 9d ago First seen · 245 lines · 39 tokens per session scan A 98faf9678bc3

Subscribe to this mod's changes

command-authoring is a skill published in the GitHub repository terrene-foundation/kailash-coc-claude-py (12 stars, last pushed 24d ago), licensed Apache-2.0. It adds 39 tokens to every session and 3,278 once invoked, about $0.0002 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 2026-09-03.

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