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 andrewsrigom/agent-skills --skill better-auth-email-password-and-sessionsgit clone --depth 1 https://github.com/andrewsrigom/agent-skillsWrote 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/andrewsrigom/agent-skills/better-auth-email-password-and-sessions)<a href="https://agentmods.dev/skills/andrewsrigom/agent-skills/better-auth-email-password-and-sessions"><img src="https://agentmods.dev/badge/skills/andrewsrigom/agent-skills/better-auth-email-password-and-sessions/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/andrewsrigom/agent-skills/better-auth-email-password-and-sessions"><img src="https://agentmods.dev/badge/skills/andrewsrigom/agent-skills/better-auth-email-password-and-sessions.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 | $0.00056 | $0.00718 |
| Opus 5.5 | $0.00022 | $0.00287 |
| Sonnet 5.5 | $0.00011 | $0.00144 |
| Haiku 4.5 | $0.00006 | $0.00072 |
Grade A, and why
better-auth-email-password-and-sessions 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 2mo 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 — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Better Auth Email Password And Sessions
Use this skill when the app relies on Better Auth's built-in account auth and session model.
Scope
- enabling
emailAndPassword - sign-up and sign-in flows
- password reset boundaries
- auto sign-in behavior after registration
- session expiration and refresh policy
- cookie cache strategy and revocation tradeoffs
- stateless or secondary-storage session design
Default path
- Enable
emailAndPasswordonly if the product actually needs password auth. - Decide whether sign-up should auto sign in or require a separate step.
- Use client methods for browser-side auth actions and
auth.apionly on the server. - Set session expiration and
updateAgeintentionally instead of accepting defaults blindly. - Choose whether cookie cache should be enabled based on revocation sensitivity and performance needs.
- If using secondary storage or stateless mode, define how session invalidation will work before rollout.
When to deviate
- Skip password auth entirely when the product only needs social or enterprise identity.
- Keep cookie cache off when immediate revocation matters more than read performance.
- Use stateless or secondary-storage sessions only when the deployment model or scale constraints justify the extra invalidation complexity.
- Move to the social or Next.js skills when those surfaces, not session policy, become the dominant concern.
Guardrails
- Do not call Better Auth client methods from the server.
- Do not enable cookie cache without understanding the delayed-revocation tradeoff.
- Keep password reset and secret-token flows server-controlled.
- Use secure cookie defaults and short cache windows for sensitive applications.
- If immediate revocation matters, prefer database-backed validation or a shorter cookie-cache lifetime.
Avoid
- enabling password auth by default without product need
- mixing browser client calls with server-only auth APIs
- turning on cookie cache just for speed without handling revocation risk
- choosing stateless sessions before deciding how revocation and invalidation will work
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.
- 2mo ago First seen · 85 lines · 56 tokens per session scan A bf20dabb9133
better-auth-email-password-and-sessions is a skill published in the GitHub repository andrewsrigom/agent-skills (2 stars, last pushed 7mo ago), licensed MIT. It adds 56 tokens to every session and 718 once invoked, about $0.0002 per session on Opus 5.5. 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.
better-auth-email-password-and-sessions compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| better-auth-email-password-and-sessionsandrewsrigom/agent-skills | Skill | 2 | 7mo ago | MIT | A | 56 | Claude Code, Codex |
| mem0-oss-to-platformmem0ai/mem0 | Skill | 69k | yesterday | Apache-2.0 | A | 217 | Claude Code, Codex |
| azure-mgmt-botservice-dotnetmicrosoft/skills | Skill | 3.2k | yesterday | MIT | A | 78 | Claude Code |
| fastapi-router-pymicrosoft/skills | Skill | 3.2k | yesterday | MIT | A | 46 | Claude Code |
| dev-runtimelangwatch/langwatch | Skill | 5.0k | today | Apache-2.0 | A | 172 | Claude Code |
| api-designericrisco/rsc-harness | Skill | 529 | 3d ago | MIT | A | 105 | Claude Code, Codex |
| migrate-segw-to-raparc-mcp/arc-1 | Skill | 253 | today | MIT | A | 106 | Claude Code |