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 skills/fmagent-project/fm-agent-plugin/diagnosenpx skills add fmagent-project/FM-Agent-Plugin --skill diagnosegit clone --depth 1 https://github.com/fmagent-project/FM-Agent-PluginWrote 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/fmagent-project/fm-agent-plugin/diagnose)<a href="https://agentmods.dev/skills/fmagent-project/fm-agent-plugin/diagnose"><img src="https://agentmods.dev/badge/skills/fmagent-project/fm-agent-plugin/diagnose.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 | $0.00041 | $0.01310 |
| Opus 5 | $0.00020 | $0.00655 |
| Sonnet 5 | $0.00008 | $0.00262 |
| Haiku 4.5 | $0.00004 | $0.00131 |
Grade A, and why
FM-Agent-Diagnose 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 6d 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 — 137 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Diagnose and analyze FM-Agent output in the project directory.
Overview
This skill reads FM-Agent output (./fm_agent/) from the project directory. It presents a summary, lists bugs with pagination, and shows detailed bug reports on request. The primary data source is fm_agent/bug_validation/summary.json, with per-bug detail in corresponding .md and .result.json files.
Prerequisites
./fm_agent/directory must exist.- If files or directories are missing, FM-Agent analysis has not completed. DO NOT sleep and retry — finish diagnosis immediately with whatever is available.
Output Directory Structure
fm_agent/
├── phases.json # Analysis phase definitions and module groupings
├── fm_agent_file_list.json # All source files processed
├── extracted_functions/ # Per-function extracted source snippets
├── spec_prompts/ # Generated spec prompts and topdown layer JSONs
├── logic_verification_results/ # Formal verification output
├── bug_validation/ # Bug reports (the directory you care about)
│ ├── summary.json # Aggregated results — always start here
│ ├── <bug_id>.md # Human-readable bug detail report
│ ├── <bug_id>.result.json # Machine-readable bug summary (same fields as summary entry)
│ └── _probe_<bug_id>.* # Compiled probe binary and code source
The <bug_id> uses -- as path separators, e.g. src--observer--net--server-cpp--accept.
Step 1: Report Summary
Always start here. Read fm_agent/bug_validation/summary.json.
The JSON contains these top-level fields:
total_reported— total bugs foundtotal_confirmed— bugs validated by probetotal_not_confirmed— bugs where probe did not reproduce the issuetotal_error— bugs where probe execution failedbugs— array of bug objects (see Step 2)
Present the summary as:
FM-Agent Analysis Summary
Total Reported: X
Confirmed: Y
Not Confirmed: Z
Errors: W
Bug reports: fm_agent/bug_validation/
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.
- 6d ago First seen · 137 lines · 41 tokens per session scan A c8a4866091bb
FM-Agent-Diagnose is a skill published in the GitHub repository fmagent-project/FM-Agent-Plugin (2 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 41 tokens to every session and 1,310 once invoked, about $0.0002 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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