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.
npx skills add fjpulidop/specrails-core --skill opsx-onboardgit clone --depth 1 https://github.com/fjpulidop/specrails-coreWrote 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.
[](https://agentmods.dev/skills/fjpulidop/specrails-core/opsx-onboard)<a href="https://agentmods.dev/skills/fjpulidop/specrails-core/opsx-onboard"><img src="https://agentmods.dev/badge/skills/fjpulidop/specrails-core/opsx-onboard/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.
<a href="https://agentmods.dev/skills/fjpulidop/specrails-core/opsx-onboard"><img src="https://agentmods.dev/badge/skills/fjpulidop/specrails-core/opsx-onboard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00026 | $0.03347 |
| Opus 5 | $0.00013 | $0.01673 |
| Sonnet 5 | $0.00005 | $0.00669 |
| Haiku 4.5 | $0.00003 | $0.00335 |
Grade A, and why
opsx-onboard scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 538 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OpenSpec project root. The
openspec/directory lives in the REPO, not the workspace this skill is driven from. The repo root is${SPECRAILS_REPO_DIR:-.}(a default-unset env var: when unset it resolves to., i.e. the current directory, so a classic in-repo run is unchanged). Run EVERYopenspeccommand against that root — wrap each invocation as(cd "${SPECRAILS_REPO_DIR:-.}" && openspec …). Treat${SPECRAILS_REPO_DIR:-.}as the OpenSpec project root for any path the CLI prints or you read/write.
Guide the user through their first complete OpenSpec workflow cycle. This is a teaching experience—you'll do real work in their codebase while explaining each step.
Preflight
Before starting, check if OpenSpec is initialized:
(cd "${SPECRAILS_REPO_DIR:-.}" && openspec status --json) 2>&1 || echo "NOT_INITIALIZED"
If not initialized:
OpenSpec isn't set up in this project yet. Run
openspec initfirst, then come back to/opsx:onboard.
Stop here if not initialized.
Phase 1: Welcome
Display:
## Welcome to OpenSpec!
I'll walk you through a complete change cycle—from idea to implementation—using a real task in your codebase. Along the way, you'll learn the workflow by doing it.
**What we'll do:**
1. Pick a small, real task in your codebase
2. Explore the problem briefly
3. Create a change (the container for our work)
4. Build the artifacts: proposal → specs → design → tasks
5. Implement the tasks
6. Archive the completed change
**Time:** ~15-20 minutes
Let's start by finding something to work on.
Phase 2: Task Selection
Codebase Analysis
Scan the codebase for small improvement opportunities. Look for:
- TODO/FIXME comments - Search for
TODO,FIXME,HACK,XXXin code files - Missing error handling -
catchblocks that swallow errors, risky operations without try-catch - Functions without tests - Cross-reference
src/with test directories - Type issues -
anytypes in TypeScript files (: any,as any) - Debug artifacts -
console.log,console.debug,debuggerstatements in non-debug code - Missing validation - User input handlers without validation
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.
- 9d ago First seen · 538 lines · 26 tokens per session scan A 23092c80b15d
opsx-onboard is a skill published in the GitHub repository fjpulidop/specrails-core (9 stars, last pushed yesterday), licensed MIT. It adds 26 tokens to every session and 3,347 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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