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 instructions/igorbarshteyn/glasswing-open/claude-mdgit clone --depth 1 https://github.com/igorbarshteyn/glasswing-openWrote 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/igorbarshteyn/glasswing-open/claude-md)<a href="https://agentmods.dev/instructions/igorbarshteyn/glasswing-open/claude-md"><img src="https://agentmods.dev/badge/instructions/igorbarshteyn/glasswing-open/claude-md.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 | $0.20859 | $0.20859 |
| Opus 5 | $0.10429 | $0.10429 |
| Sonnet 5 | $0.04172 | $0.04172 |
| Haiku 4.5 | $0.02086 | $0.02086 |
Grade E, and why
glasswing-open CLAUDE.md scanned grade E with 4 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 5d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- ### Target: [Name] - **Target mode:** [local-source / remote-repo / api-endpoint / website / remote-machine] - **Target location:** [local path / git URL / API base URL / website URL / IP:port] - **Language(s):** - Cloud metadata endpointhighServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
Test with internal addresses (127.0.0.1, 169.254.169.254 for cloud Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
# path traversal, SSRF via requests/urllib, yaml.load without SafeLoader Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
# Focus: pickle deserialization, eval/exec of user input, os.system/ The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 5d ago First seen · 2,032 lines · 20,859 tokens per session scan E fd25f6f70da8
glasswing-open CLAUDE.md is an instructions file published in the GitHub repository igorbarshteyn/glasswing-open (23 stars, last pushed 4mo ago), with no licence file. It adds 20,859 tokens to every session, about $0.1043 per session on Opus 5. A static security scan graded it E with 4 findings (hidden instructions, cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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