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 skills add joaquimscosta/arkhe-claude-plugins --skill research-frontmattergit clone --depth 1 https://github.com/joaquimscosta/arkhe-claude-pluginsWrote 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/joaquimscosta/arkhe-claude-plugins/research-frontmatter)<a href="https://agentmods.dev/skills/joaquimscosta/arkhe-claude-plugins/research-frontmatter"><img src="https://agentmods.dev/badge/skills/joaquimscosta/arkhe-claude-plugins/research-frontmatter/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/skills/joaquimscosta/arkhe-claude-plugins/research-frontmatter"><img src="https://agentmods.dev/badge/skills/joaquimscosta/arkhe-claude-plugins/research-frontmatter.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 | $0.00064 | $0.00854 |
| Opus 5.5 | $0.00026 | $0.00342 |
| Sonnet 5.5 | $0.00013 | $0.00171 |
| Haiku 4.5 | $0.00006 | $0.00085 |
Grade A, and why
research-frontmatter 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 yesterday.
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 — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Research Frontmatter
Enforce standard YAML frontmatter on research documents so GitHub renders metadata as a table and readers can judge staleness.
Quick Start
# Validate all research documents
uv run ${CLAUDE_SKILL_DIR}/scripts/validate_research_docs.py --format text
# Check staleness only
uv run ${CLAUDE_SKILL_DIR}/scripts/validate_research_docs.py --staleness-only
# Resolve research path (JD-aware)
uv run ${CLAUDE_SKILL_DIR}/scripts/resolve_research_path.py --format json
# Override research directory
uv run ${CLAUDE_SKILL_DIR}/scripts/validate_research_docs.py --research-dir docs/30-research
Required Frontmatter
Every research file MUST have these 5 fields:
---
title: "Human-readable title"
version: "1.0.0"
status: Published # Published | Draft | Living Document
created: YYYY-MM-DD
last_updated: YYYY-MM-DD
---
Optional fields (slug, tags, aliases, promoted_at, last_refreshed, sources) MAY follow.
JD-Aware Path Resolution
The skill auto-detects Johnny.Decimal structure:
- Look for
.jd-config.jsonat project root - Find area containing "research" (default: prefix
30) - Construct path:
{root}/{prefix}-{name}/(e.g.docs/30-research/) - Fall back to
docs/research/if no JD config
This applies to both validation and the deep-research promote workflow.
Validation Rules
| Rule | Severity | Check |
|---|---|---|
| RD001 | ERROR | Missing YAML frontmatter |
| RD002-006 | ERROR | Missing required field (title, version, status, created, last_updated) |
| RD007 | ERROR | Invalid status value |
| RD008-009 | WARNING | Invalid date format |
| RD010 | WARNING | Invalid version format |
| RD011 | WARNING | Missing Executive Summary section |
| RD012 | WARNING | Missing References section |
| RD013 | ERROR | Research doc not in README.md index |
| RD014 | WARNING | README index metadata mismatch |
| RD015 | WARNING | Index references missing file |
| RD016 | WARNING | Stale last_updated vs git history |
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- yesterday First seen · 103 lines · 64 tokens per session scan A f4af59c4cc34
research-frontmatter is a skill published in the GitHub repository joaquimscosta/arkhe-claude-plugins (21 stars, last pushed yesterday), licensed MIT. It adds 64 tokens to every session and 854 once invoked, about $0.0003 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 2026-10-16.
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