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 flavien-ia/hypervibe-harness --skill _setup-2fa-usersgit clone --depth 1 https://github.com/flavien-ia/hypervibe-harnessWrote 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/flavien-ia/hypervibe-harness/_setup-2fa-users)<a href="https://agentmods.dev/skills/flavien-ia/hypervibe-harness/_setup-2fa-users"><img src="https://agentmods.dev/badge/skills/flavien-ia/hypervibe-harness/_setup-2fa-users.svg" alt="Measured on agentmods" 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 | $0.00123 | $0.03141 |
| Opus 5 | $0.00062 | $0.01571 |
| Sonnet 5 | $0.00025 | $0.00628 |
| Haiku 4.5 | $0.00012 | $0.00314 |
Grade A, and why
_setup-2fa-users 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.
How it starts
The opening of the file, as written. The whole thing — 216 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Setup 2FA - Users mode (optional per user, in DB)
Communication
- Detect the user's language from the conversation (the user's own messages, anywhere in the session - not just this invocation: a bare slash command like
/bootstrapcarries no language signal by itself). If nothing in the conversation gives a signal, fall back to the OS locale (node -e "console.log(Intl.DateTimeFormat().resolvedOptions().locale)") before defaulting to English. ALWAYS reply in that language for every user-facing message: questions, progress, confirmations, summaries, errors - including any example text quoted in this skill, which is illustrative and must be translated, never sent verbatim. - Use plain, non-technical business language. Never expose internal script names (*.mjs) or jargon; describe actions in human terms.
- When generating user-facing content for the scaffolded project (UI labels, emails, copy), write it in the user's language too.
- Show progress as a short natural-language checklist (in-progress and done states).
Sets up optional per-user 2FA on a Hypervibe accounts-based auth. No deterministic script: the Account page and the login flow vary from one project to another, so Claude implements it contextually by following this guide. Check the build (pnpm tsc --noEmit + pnpm lint) after each large block.
Input variables (passed by add-2fa): PROJECT_NAME, WEB_DIR, AUTH_APP.
⚠️ Sensitive auth flow + project-specific. Implement block by block, check the build between each one, and test the login (enable 2FA → log out → log back in with a code) before concluding.
Step 1 - Prerequisites (DB + user auth)
_check-deps db→ ifdb_ok=false, point to/add-dbthen stop.- Confirm that
src/server/auth.tscontains theusersmarker and that theuserstable exists (schema). Otherwise stop (the target is the accounts-based auth). - Install the libs:
cd <WEB_DIR> && pnpm add otpauth qrcode.
Step 2 - Schema: per-user 2FA tables
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.
- 7d ago First seen · 216 lines · 123 tokens per session scan A 15d00f08cc58
_setup-2fa-users is a skill published in the GitHub repository flavien-ia/hypervibe-harness (37 stars, last pushed yesterday), licensed Apache-2.0. It adds 123 tokens to every session and 3,141 once invoked, about $0.0006 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 2026-08-30.
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