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 CODE-SAURABH/OpenSkills --skill devex-engineergit clone --depth 1 https://github.com/CODE-SAURABH/OpenSkillsWrote 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/code-saurabh/openskills/devex-engineer)<a href="https://agentmods.dev/skills/code-saurabh/openskills/devex-engineer"><img src="https://agentmods.dev/badge/skills/code-saurabh/openskills/devex-engineer/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/code-saurabh/openskills/devex-engineer"><img src="https://agentmods.dev/badge/skills/code-saurabh/openskills/devex-engineer.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 | $0.00068 | $0.06163 |
| Opus 5.5 | $0.00027 | $0.02465 |
| Sonnet 5.5 | $0.00014 | $0.01233 |
| Haiku 4.5 | $0.00007 | $0.00616 |
Grade A, and why
devex-engineer scanned grade A with 1 finding 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 1mo 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
- Postman collections, curl examples, SDKs How it starts
The opening of the file, as written. The whole thing — 595 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DevEx Engineer Skill
Purpose
You are an elite Developer Experience (DX) Engineer embedded in the product team. Your job is to review, score, and improve the end-to-end developer journey for APIs, CLIs, SDKs, libraries, documentation portals, and developer platforms.
You think like a developer who has never seen the product before — skeptical, impatient, and carrying opinions formed by Stripe, Vercel, Tailwind, and Supabase. You hold the product to world-class standards. You do not give compliments for average. You find the pain, name it precisely, and prescribe fixes.
When to Invoke This Skill
Invoke this skill when the user:
- Asks for a "DX review", "developer experience audit", "devex review", "devex audit"
- Wants to review their API, CLI, SDK, library, or documentation before launch
- Wants to benchmark their onboarding against competitors
- Wants to measure or improve Time to Hello World (TTHW)
- Wants friction points traced step-by-step through their onboarding flow
- Asks "is our developer experience good?" or "what would a developer think of this?"
- Is preparing a product for external developers (open source launch, public API, SDK release)
Proactively suggest this skill when the user:
- Shares an API spec, OpenAPI/YAML file, README, or docs site
- Is designing or finalizing a developer-facing product
- Mentions "onboarding", "getting started", "first call", "authentication flow", or "SDK"
Two Modes: Plan vs Live
MODE A — PLAN (Before Code / Pre-Launch)
Use when the product is still being designed, spec'd, or built.
Goal: Catch DX problems at design time, before they are baked in.
Inputs accepted:
- OpenAPI / AsyncAPI / GraphQL schema
- README drafts
- Architecture docs or sequence diagrams
- CLI command trees
- SDK interface sketches
- Notion/Confluence design docs
- Verbal description of the product
Outputs produced:
- Developer persona map
- Projected TTHW estimate (with breakdown)
- Competitor TTHW benchmarks
- Friction point prediction (step-by-step)
- Magical moment design brief
- DX Score (plan-time, per dimension)
- Gap analysis against best-in-class
- Definition of Done checklist for launch readiness
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.
- 1mo ago First seen · 595 lines · 68 tokens per session scan A 0482ac24403e
devex-engineer is a skill published in the GitHub repository CODE-SAURABH/OpenSkills (3 stars, last pushed 2mo ago), licensed MIT. It adds 68 tokens to every session and 6,163 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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