Borrowing it
Nothing to install: this file belongs to JuliusBrussee/caveman-browse. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/JuliusBrussee/caveman-browse/main/GEMINI.mdgit clone --depth 1 https://github.com/JuliusBrussee/caveman-browseWrote 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/instructions/juliusbrussee/caveman-browse/gemini-md)<a href="https://agentmods.dev/instructions/juliusbrussee/caveman-browse/gemini-md"><img src="https://agentmods.dev/badge/instructions/juliusbrussee/caveman-browse/gemini-md/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/instructions/juliusbrussee/caveman-browse/gemini-md"><img src="https://agentmods.dev/badge/instructions/juliusbrussee/caveman-browse/gemini-md.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 | $0.00229 | $0.00229 |
| Opus 5.5 | $0.00092 | $0.00092 |
| Sonnet 5.5 | $0.00046 | $0.00046 |
| Haiku 4.5 | $0.00023 | $0.00023 |
Grade A, and why
caveman-browse GEMINI.md 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.
What it actually says
caveman-browse
Browser driver over MCP. Four tools: browser_snapshot, browser_act,
browser_eval, browser_recover.
Loop: snapshot → act on [uid] → focused re-snapshot to prove the action
settled → recover exact bytes only when the compressed view hid something.
- Large pages: always pass
querytobrowser_snapshot(keeps ≤12 best matches plus ancestors; ~98 tokens instead of ~12k on a 200-row page). settled:falsefrombrowser_act= CDP dispatch only, not app state; prove outcomes with a focused re-snapshot before the next action.- uids are per-snapshot; after navigation or a
cave_browser_snapshot_uncompressederror, take a fresh snapshot before acting. - Denied by design:
file:/javascript:/privileged schemes, disabled controls, unknown uids — errors carrycave_snake_code, don't retry blind. - All savings figures are
inferred(offline token count), never verified.
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 · 18 lines · 229 tokens per session scan A eee8dfc9c50c
caveman-browse GEMINI.md is an instructions file published in the GitHub repository JuliusBrussee/caveman-browse (49 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 229 tokens to every session, about $0.0009 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 2026-09-04.
caveman-browse GEMINI.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| caveman-browse GEMINI.mdJuliusBrussee/caveman-browse | Instructions file | 49 | 1mo ago | Apache-2.0 | A | 229 | Gemini CLI |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
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| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |