What is skills AGENTS.md?

Repository instructions for AI coding agents that explain how to understand the project and create new skills. A skill is a reusable set of instructions for an agent.

Use it when adding or reviewing skills, reading the project layout, or checking whether a skill follows the repository’s conventions.

It gives agents consistent rules for the repository’s structure, naming, file format, and good documentation practices.

How altertable-ai/skills configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to altertable-ai/skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/altertable-ai/skills/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/altertable-ai/skills

Made for: Codex, OpenCode.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/altertable-ai/skills/agents-md/github.svg)](https://agentmods.dev/instructions/altertable-ai/skills/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/altertable-ai/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/altertable-ai/skills/agents-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/altertable-ai/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/altertable-ai/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,781 This file is loaded in full into every session.

When invoked 1,781 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.01781	$0.01781
Opus 5.5	$0.00712	$0.00712
Sonnet 5.5	$0.00356	$0.00356
Haiku 4.5	$0.00178	$0.00178

Measured 8d ago against content hash 633b689b22ab, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skills AGENTS.md 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 8d 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.

AGENTS.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Guidance for agents maintaining Altertable's portable Agent Skills and marketplace plugin metadata.

Sources of Truth

Use Altertable's complete agent documentation for current product concepts and public behavior.
For MCP arguments and enums, prefer the live tool schema and search_docs over copied parameter lists.
Treat explicit product corrections from the maintainers as authoritative when published documentation is lagging a release.
Follow the Agent Skills Specification for package structure and frontmatter.

Do not preserve an obsolete product concept merely because an older skill or documentation page still mentions it.

Repository Map

skills/{skill-name}/SKILL.md       Shipped skill entry points
skills/{skill-name}/references/   Optional conditional detail
templates/SKILL_TEMPLATE/         Starting point for a new skill
.claude-plugin/                   Claude plugin metadata
.codex-plugin/plugin.json         Codex plugin metadata
.cursor-plugin/                   Cursor plugin metadata
scripts/sync-agents-md.py         Regenerates skill inventories
scripts/scorer/                   LLM quality scorer
scripts/tests/                    Repository and portfolio checks

Portfolio Principles

Assume the agent already understands analytics, SQL, APIs, and software engineering. Teach the non-obvious Altertable behavior that changes execution.
Organize skills around durable platform workflows, not generic analytical techniques or a catalog of every tool.
Keep SKILL.md concise; target fewer than 180 lines. Add a focused reference only when conditional detail warrants loading it separately.
Distinguish read-only analysis, previews, and persistent writes. Authentication never implies permission for an unrequested mutation.
Use imperative lowercase names with hyphens. Write third-person descriptions with discriminating trigger language.
Treat use-altertable as the shared platform brief and ask-altertable as the fast path for delegated analytical questions.
Tasks produce Findings delivered through Notifications. Do not reintroduce retired feature terminology or workflows.

Read the full file on GitHub · 124 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.

8d ago Changed · +7 tokens per session 633b689b22ab
24d ago Changed · -4 tokens per session 5ff1f0fe42c4
1mo ago Changed · +21 tokens per session 95a739c76457
1mo ago Changed · +4 lines · +60 tokens per session bfd779bfc0bd
1mo ago Changed · +4 lines · +60 tokens per session ed7b2d9c00c5
1mo ago Changed · +4 lines · +60 tokens per session 16d281303c88
1mo ago Changed · +2 tokens per session 48651d611345
1mo ago Changed · +25 tokens per session 0a010c8578b9
1mo ago Changed · -40 lines · +192 tokens per session 8d2f4df0786d
2mo ago First seen · 152 lines · 1,358 tokens per session scan A 715372b3f83f

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository altertable-ai/skills (7 stars, last pushed yesterday), licensed MIT. It adds 1,781 tokens to every session, about $0.0071 per session on Opus 5.5. 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.

Building agents agent-skills ai-agents altertable

skills AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
skills AGENTS.mdaltertable-ai/skills	Instructions file	7	yesterday	MIT	A	1,781	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

skills: Instructions file for Codex