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 add-authgit 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/add-auth)<a href="https://agentmods.dev/skills/flavien-ia/hypervibe-harness/add-auth"><img src="https://agentmods.dev/badge/skills/flavien-ia/hypervibe-harness/add-auth/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/flavien-ia/hypervibe-harness/add-auth"><img src="https://agentmods.dev/badge/skills/flavien-ia/hypervibe-harness/add-auth.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00117 | $0.02942 |
| Opus 5 | $0.00059 | $0.01471 |
| Sonnet 5 | $0.00023 | $0.00588 |
| Haiku 4.5 | $0.00012 | $0.00294 |
Grade A, and why
add-auth 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 10d 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 — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add Auth - Orchestrator
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).
Lightweight orchestrator. Detects the current state via the // hypervibe:auth-modes <list> marker at the top of src/server/auth.ts, proposes a contextual menu based on what is already installed, and delegates to the right sub-skill (_setup-auth-admin / _setup-auth-users) for fresh installs. For UPGRADES (adding the second mode when one already exists), Claude drives the contextual editing of auth.ts itself - see the UPGRADE Section.
Step 0 - Detect the current state and contextual menu
Read the marker in src/server/auth.ts:
if [ -f "<WEB_DIR>/src/server/auth.ts" ]; then
grep -E "^// hypervibe:auth-modes" "<WEB_DIR>/src/server/auth.ts" | head -1
fi
Parse:
- No file OR no marker →
existing_modes = [] // hypervibe:auth-modes admin→["admin"]// hypervibe:auth-modes users→["users"]// hypervibe:auth-modes admin, users→["admin","users"]auth.tspresent WITHOUT marker →["unknown"]
Case [] → fresh install
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 10d ago First seen · 178 lines · 117 tokens per session scan A d380ffe25b39
add-auth is a skill published in the GitHub repository flavien-ia/hypervibe-harness (37 stars, last pushed 2d ago), licensed Apache-2.0. It adds 117 tokens to every session and 2,942 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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