tsed-formio: Skill for Claude Code

.claude/skills/openspec-onboard/SKILL.md

openspec-onboard is a skill for Claude Code from tsedio/tsed-formio. It costs 26 tokens per session (3,134 once invoked), scanned A, original, no licence file.

A guided introduction to OpenSpec, a workflow for describing and carrying out software changes, using a real codebase.

In plain words
What is it for?
Use it to learn OpenSpec and practise applying a complete change to an existing project.
Why use it?
It helps newcomers understand the workflow by explaining each step while they complete one from start to finish.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is tsedio/tsed-formio's own configuration. It tells Claude Code how to work on tsed-formio itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything tsed-formio configures →

Reuse

Borrowing it

Nothing to install: this file belongs to tsedio/tsed-formio. 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/tsedio/tsed-formio/master/.claude/skills/openspec-onboard/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/tsedio/tsed-formio

Made for: Claude Code.

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/tsedio/tsed-formio/openspec-onboard.svg)](https://agentmods.dev/skills/tsedio/tsed-formio/openspec-onboard)
Your own site
<a href="https://agentmods.dev/skills/tsedio/tsed-formio/openspec-onboard"><img src="https://agentmods.dev/badge/skills/tsedio/tsed-formio/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 3,134 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 $0.03134
Opus 5 $0.00013 $0.01567
Sonnet 5 $0.00005 $0.00627
Haiku 4.5 $0.00003 $0.00313

Measured 6d ago against content hash ee9da4f86ced, 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 6d 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/openspec-onboard/SKILL.md · 550 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. 6d ago First seen · 550 lines · 26 tokens per session scan A ee9da4f86ced

Subscribe to this mod's changes

openspec-onboard is a skill published in the GitHub repository tsedio/tsed-formio (16 stars, last pushed 4mo ago), with no licence file. It adds 26 tokens to every session and 3,134 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 2026-09-01.

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