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 egravert/egravert-marketplace --skill agentic-practicesgit clone --depth 1 https://github.com/egravert/egravert-marketplaceWrote 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/egravert/egravert-marketplace/agentic-practices)<a href="https://agentmods.dev/skills/egravert/egravert-marketplace/agentic-practices"><img src="https://agentmods.dev/badge/skills/egravert/egravert-marketplace/agentic-practices/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/egravert/egravert-marketplace/agentic-practices"><img src="https://agentmods.dev/badge/skills/egravert/egravert-marketplace/agentic-practices.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 | $0.00000 | $0.00505 |
| Opus 5 | $0.00000 | $0.00253 |
| Sonnet 5 | $0.00000 | $0.00101 |
| Haiku 4.5 | $0.00000 | $0.00051 |
Grade A, and why
agentic-practices 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 10d 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 — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agentic Practices Installer
Install agentic engineering practices into the current project's CLAUDE.md as permanent coding standards.
Procedure
Follow these steps exactly when this skill is invoked:
Step 1: Identify available languages
List the files in this skill's references/ directory matching the pattern agentic-*-practices.md. Extract the language name from each filename (e.g., agentic-go-practices.md → "Go"). These are the supported languages.
Step 2: Ask the user which language to install
Present the available languages and ask the user to choose one. If only one language is available, still confirm it with the user. Do not auto-detect — the user decides.
If the user requests a language that has no practices file, tell them which languages are currently supported and stop.
Step 3: Read the project's CLAUDE.md
Look for CLAUDE.md in the project root. If it does not exist, create a new one.
Step 4: Check for existing installation
Search the CLAUDE.md for the marker:
<!-- BEGIN agentic-practices vX.Y.Z -->
- If the marker exists and the version matches
1.0.0: Tell the user the practices are already installed and up to date. Stop. - If the marker exists but the version is older: Replace everything between the
BEGINandENDmarkers (inclusive) with the new version. Tell the user the practices were updated from vX.Y.Z to v1.0.0. - If no marker exists: Proceed to installation.
Step 5: Install the practices
Read the contents of references/agentic-<language>-practices.md for the chosen language.
Append the following block to the end of CLAUDE.md:
<!-- BEGIN agentic-practices v1.0.0 (<language>) -->
[contents of the language-specific practices file]
<!-- END agentic-practices -->
Replace <language> with the chosen language name (e.g., "go", "python").
Step 6: Confirm
Tell the user:
- Which language practices were installed
- The version installed (1.0.0)
- That the practices will apply to all future Claude Code sessions in this project
- That they can re-run this skill to update if a newer version is available
What ships with it
1 file 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.
- 10d ago First seen · 57 lines · 0 tokens per session scan A 8ac2a7ebd0ca
agentic-practices is a skill published in the GitHub repository egravert/egravert-marketplace (4 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 505 tokens. 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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