openspec-onboard

openspec-onboard is a skill for Codex from AlekseiSeleznev/intent-driven-codex. It costs 26 tokens per session (3,475 once invoked), scanned A, original, no licence file.

A guided introduction to OpenSpec that explains a complete workflow while working on a real codebase. OpenSpec is the workflow this add-on teaches and uses.

In plain words
What is it for?
Use it to learn the OpenSpec workflow from start to finish while applying it to an existing project.
Why use it?
It helps new users understand OpenSpec by combining explanations with practical coding work.

Skill for Codex

Written for Codex: installed under .codex/.

Good fit Use it to learn the OpenSpec workflow from start to finish while applying it to an existing project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/alekseiseleznev/intent-driven-codex/openspec-onboard
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 AlekseiSeleznev/intent-driven-codex --skill openspec-onboard
Clone the repo
git clone --depth 1 https://github.com/AlekseiSeleznev/intent-driven-codex

Made for: 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 openspec-onboard

README.md
[![agentmods](https://agentmods.dev/badge/skills/alekseiseleznev/intent-driven-codex/openspec-onboard.svg)](https://agentmods.dev/skills/alekseiseleznev/intent-driven-codex/openspec-onboard)
Your own site
<a href="https://agentmods.dev/skills/alekseiseleznev/intent-driven-codex/openspec-onboard"><img src="https://agentmods.dev/badge/skills/alekseiseleznev/intent-driven-codex/openspec-onboard.svg" alt="Measured on agentmods" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,475 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 $0.00026 $0.03475
Opus 5 $0.00013 $0.01737
Sonnet 5 $0.00005 $0.00695
Haiku 4.5 $0.00003 $0.00347

Measured 7d ago against content hash 2e4d25af44af, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

openspec-onboard 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 7d 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.

.codex/skills/openspec-onboard/SKILL.md · 558 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

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. 7d ago First seen · 558 lines · 26 tokens per session scan A 2e4d25af44af

Subscribe to this mod's changes

openspec-onboard is a skill published in the GitHub repository AlekseiSeleznev/intent-driven-codex (5 stars, last pushed 3mo ago), with no licence file. It adds 26 tokens to every session and 3,475 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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