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 agentmods add commands/callmejustdodo/popcorn/browsergit clone --depth 1 https://github.com/callmejustdodo/popcornWhat 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 | $0.00019 | $0.00310 |
| Opus 5 | $0.00010 | $0.00155 |
| Sonnet 5 | $0.00004 | $0.00062 |
| Haiku 4.5 | $0.00002 | $0.00031 |
Grade B, and why
browser scanned grade B with 1 finding 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 2d 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
echo "current: $(cat "$HOME/.claude/.popcorn-browser")" What it actually says
Set the browser popcorn controls. Argument: $ARGUMENTS
Run this bash command to update (or show) the config, then report the result in one short sentence:
case "$ARGUMENTS" in
chrome|Chrome|"Google Chrome") BROWSER="Google Chrome" ;;
arc|Arc) BROWSER="Arc" ;;
safari|Safari) BROWSER="Safari" ;;
brave|Brave|"Brave Browser") BROWSER="Brave Browser" ;;
edge|Edge|"Microsoft Edge") BROWSER="Microsoft Edge" ;;
"")
if [ -f "$HOME/.claude/.popcorn-browser" ]; then
echo "current: $(cat "$HOME/.claude/.popcorn-browser")"
else
echo "current: Google Chrome (default — no config set)"
fi
exit 0
;;
*) BROWSER="$ARGUMENTS" ;;
esac
mkdir -p "$HOME/.claude"
echo "$BROWSER" > "$HOME/.claude/.popcorn-browser"
echo "popcorn browser set to: $BROWSER"
The config file lives at ~/.claude/.popcorn-browser. The hooks read it on every prompt; no restart needed.
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.
- 2d ago First seen · 34 lines · 19 tokens per session scan B d109a491d6a5
browser is a command published in the GitHub repository callmejustdodo/popcorn (9 stars, last pushed 3mo ago), licensed MIT. It adds 19 tokens to every session and 310 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other commands, from other repositories
mcp
Run Peekaboo as an MCP server via peekaboo mcp.
browser
Control Chrome page content via peekaboo browser.
scroll
Scroll targets in the background or explicitly synthesize foreground wheel input.
daemon
Start, stop, and inspect the headless Peekaboo daemon.
screen
Enumerate connected displays via peekaboo screen list.
browseros-review
You are a code review specialist. Identify genuine issues while filtering out false positives.