Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add sonomoshq/Canary/plugin install canaryWrote 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/sonomoshq/canary/leaked)<a href="https://agentmods.dev/skills/sonomoshq/canary/leaked"><img src="https://agentmods.dev/badge/skills/sonomoshq/canary/leaked.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 | $0.00028 | $0.00666 |
| Opus 5 | $0.00014 | $0.00333 |
| Sonnet 5 | $0.00006 | $0.00133 |
| Haiku 4.5 | $0.00003 | $0.00067 |
Grade A, and why
leaked 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 7d 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 — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Sonomos Leak Counter — Dashboard
Handle the subcommand from $ARGUMENTS:
dashboard or no argument (default)
Generate and open the interactive HTML dashboard:
python3 "${CLAUDE_PLUGIN_ROOT}/scripts/dashboard.py"
Then give a brief text summary:
SONOMOS_DIR="${CLAUDE_PLUGIN_DATA:-$HOME/.sonomos}"
LEAKS="$SONOMOS_DIR/leaks.jsonl"
if [ -f "$LEAKS" ] && [ -s "$LEAKS" ]; then
TOTAL=$(wc -l < "$LEAKS")
echo "Total: $TOTAL PII items"
echo "By type:"
jq -r '.type' "$LEAKS" | sort | uniq -c | sort -rn | head -10
fi
demo
Show the dashboard populated with sample data, so the user can see what it looks like before any real detections exist:
python3 "${CLAUDE_PLUGIN_ROOT}/scripts/dashboard.py" --demo
stats
Text-only summary without opening a browser. Prefer the bundled tool over inline jq:
bash "${CLAUDE_PLUGIN_ROOT}/bin/canary-stats"
reset
Ask for confirmation first. If confirmed:
SONOMOS_DIR="${CLAUDE_PLUGIN_DATA:-$HOME/.sonomos}"
rm -f "$SONOMOS_DIR/leaks.jsonl" "$SONOMOS_DIR/.hud_cache" "$SONOMOS_DIR/.state" \
"$SONOMOS_DIR/.filescan_index" "$SONOMOS_DIR/.cursor_"*
echo "Leak counter reset to 0."
Detection Architecture
- Regex detectors (automatic): checksum-validated pattern matching runs silently on every Stop hook and on every file write/edit. Catches structured PII: credit cards, SSNs, emails, IBANs, crypto addresses, vendor API keys, phone numbers, and more.
- Claude self-scan (automatic): Claude scans each new user message for the semantic categories regex can't catch — names, addresses, legal IDs, medical records, trade secrets — on every Stop hook. Run
/canary:scanfor a deeper scan of the full conversation. No API key needed — Claude is the detector. - Extension audit (on demand):
/canary:auditscans installed skills, agents, plugins, and MCP configs for leaked secrets and suspicious exfiltration patterns.
Never display raw PII values. Always show the redacted value field from the leaks file.
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.
- 7d ago First seen · 71 lines · 28 tokens per session scan A 89b52c63b582
leaked is a skill published in the GitHub repository sonomoshq/Canary (2 stars, last pushed 7d ago), licensed MIT. It adds 28 tokens to every session and 666 once invoked, about $0.0001 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 2026-08-31.
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