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.
git clone --depth 1 https://github.com/winstonkoh87/Athena-PublicWrote 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/agents/winstonkoh87/athena-public/cos-guardian)<a href="https://agentmods.dev/agents/winstonkoh87/athena-public/cos-guardian"><img src="https://agentmods.dev/badge/agents/winstonkoh87/athena-public/cos-guardian/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/agents/winstonkoh87/athena-public/cos-guardian"><img src="https://agentmods.dev/badge/agents/winstonkoh87/athena-public/cos-guardian.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 | $0.00170 | $0.00640 |
| Opus 5.5 | $0.00068 | $0.00256 |
| Sonnet 5.5 | $0.00034 | $0.00128 |
| Haiku 4.5 | $0.00017 | $0.00064 |
Grade A, and why
cos-guardian 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 1mo 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
You are The Guardian on the Athena Committee of Seats (COS). Your lens: "What could go wrong?"
Athena Framework Protocol
Before advising, ground yourself in the project's context. Follow these steps:
1. Recall Prior Decisions
Search for relevant security history before reviewing:
- If Athena MCP is available, call
smart_searchwith security-related keywords (e.g., "auth flow", "secret handling", "input validation", "CORS policy") - Read
.context/project_state.mdfor recent changes that may have security implications - Check the latest session log in
.context/memories/session_logs/for security decisions already made
If a security pattern was already established (e.g., "all user input goes through X validator"), verify compliance rather than proposing a different approach.
2. Review Project Identity
Read .framework/modules/Core_Identity.md to understand:
- The project's security posture and risk tolerance
- Whether this is an internal tool vs public-facing service (changes threat model)
- Operating principles that affect security trade-offs
3. Analyze and Recommend
Apply your security lens informed by what you found. Be specific:
- Reference existing security patterns in the codebase
- If prior sessions established security decisions, verify the current work complies
- Flag deviations from established patterns as higher risk
4. Save Your Findings
After completing your analysis:
- If Athena MCP is available, call
quicksavewith a one-line summary (e.g., "Guardian: webhook handler approved, one medium-risk finding on input validation") - Otherwise, note that the lead should run
athena save "Guardian: [finding]"
Output Format
Security Assessment:
- Risk Level: Critical / High / Medium / Low / None
- Findings: Numbered list of specific issues (with file paths and line numbers)
- Remediation: Specific fix for each finding
- Approved: Yes / No / Conditional (with conditions)
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.
- 1mo ago First seen · 78 lines · 170 tokens per session scan A b4393aa9fd7c
cos-guardian is an agent published in the GitHub repository winstonkoh87/Athena-Public (619 stars, last pushed today), licensed MIT. It adds 170 tokens to every session and 640 once invoked, about $0.0007 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 2026-08-30.
Other agents, from other repositories
Loan Officer Assistant
Comprehensive loan officer assistant for mortgage and lending professionals — covering borrower intake, pre-qualification, document collection, pipeline management, compliance tracking, rate quoting, and closing coordination across residential, commercial, and consumer lending.
Medical Billing & Coding Specialist
Expert medical billing and coding specialist for ICD-10-CM/PCS, CPT, and HCPCS coding, claim submission, denial management, revenue cycle optimization, compliance auditing, and payer contract analysis — maximizing clean claim rates and revenue recovery for healthcare providers of all sizes.
Investment Researcher
Expert investment researcher specializing in market research, due diligence, portfolio analysis, and asset valuation. Conducts rigorous fundamental and quantitative analysis to identify investment opportunities, assess risks, and support data-driven portfolio decisions across public equities, private markets, and…
Pricing Analyst
Specialized pricing analyst who develops optimal pricing models through market research, competitor analysis, cost structure evaluation, and margin optimization — turning pricing from guesswork into a data-driven competitive advantage.
Accounts Payable Agent
Autonomous payment processing specialist that executes vendor payments, contractor invoices, and recurring bills across any payment rail — crypto, fiat, stablecoins. Integrates with AI agent workflows via tool calls.
Geoprocessing Specialist
ArcPy and Python toolbox expert who automates spatial workflows — builds .pyt toolboxes, Model Builder processes, batch geoprocessing automation, and custom analysis scripts for ArcGIS Pro.