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 thunder-id/skills --skill thunderid-integrate-browsergit clone --depth 1 https://github.com/thunder-id/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/thunder-id/skills/thunderid-integrate-browser)<a href="https://agentmods.dev/skills/thunder-id/skills/thunderid-integrate-browser"><img src="https://agentmods.dev/badge/skills/thunder-id/skills/thunderid-integrate-browser.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 | $0.00072 | $0.00514 |
| Opus 5 | $0.00036 | $0.00257 |
| Sonnet 5 | $0.00014 | $0.00103 |
| Haiku 4.5 | $0.00007 | $0.00051 |
Grade A, and why
thunderid-integrate-browser 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 8d 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.
What it actually says
ThunderID — JavaScript (Browser) Integration
Assumes ThunderID is running at https://localhost:8090. If not, run /thunderid-install first.
Fetch the canonical, always-current integration guide before writing any code:
WebFetch https://thunderid.dev/docs/v1.0.x/getting-started/connect-your-application/browser.md
Follow that guide end to end — creating the Console application, installing @thunderid/browser, initializing ThunderIDBrowserClient, adding sign-in/sign-out UI, and verifying the app runs — adapting file names, paths, and code style to this project's actual structure rather than copying the doc's file layout verbatim.
You do not have Console access or a browser tool. Whenever a step needs a Console UI action (creating the application, copying the Client ID, adding a redirect URI), tell the user exactly what to click and ask them to report the value back.
If the fetch fails (offline, docs unreachable), tell the user and give them the URL above to open manually. Do not improvise integration steps from memory.
Project-specific notes
- Detect the package manager from lockfiles:
pnpm-lock.yaml→pnpm add,yarn.lock→yarn add,bun.lockb→bun add, elsenpm install.
Troubleshooting
- Certificate error — Visit
https://localhost:8090in your browser and accept the warning once. redirect_uri_mismatch— The dev server's origin must exactly match an entry in Authorized Redirect URIs on the application.- Blank page / stuck on redirect — The client's redirect-completion call must run before checking sign-in state; it's what completes the OAuth code exchange after the redirect back from ThunderID.
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.
- 8d ago First seen · 34 lines · 72 tokens per session scan A 5fc9b7b2cd6d
thunderid-integrate-browser is a skill published in the GitHub repository thunder-id/skills (35 stars, last pushed 20d ago), licensed Apache-2.0. It adds 72 tokens to every session and 514 once invoked, about $0.0004 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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