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 richfrem/agent-plugins-skills --skill install-apm-packagegit clone --depth 1 https://github.com/richfrem/agent-plugins-skillsWrote 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/richfrem/agent-plugins-skills/install-apm-package)<a href="https://agentmods.dev/skills/richfrem/agent-plugins-skills/install-apm-package"><img src="https://agentmods.dev/badge/skills/richfrem/agent-plugins-skills/install-apm-package.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 | $0.00069 | $0.00809 |
| Opus 5 | $0.00034 | $0.00404 |
| Sonnet 5 | $0.00014 | $0.00162 |
| Haiku 4.5 | $0.00007 | $0.00081 |
Grade A, and why
install-apm-package 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 4d 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 — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.
install-apm-package Skill 🚀
Overview
This skill manages the safe deployment of APM primitives into their respective runtime environments. It enforces validation and target discovery to ensure byte-identical reproducibility across environments.
🚫 Non-Negotiables
- Source Integrity — Never edit files in
.agents/,.github/, or.claude/directly. Always edit the source in.apm/and re-install. - Lockfile Persistence —
apm.lock.yamlMUST be committed after any install change. - Validation First — Always run
validate_apm_package.pybefore executing the install. - Project Root Discipline — Run
apm installfrom the project root to ensure converged skills land in the authoritative.agents/folder. Running inside a package directory creates local, isolated artifacts.
Decision Tree
- Global Activation? -> Run
apm install ./path-to-packagefrom the project root. - Isolated Testing? -> Run
apm installfrom within the package directory. - Target Inferred? -> (e.g.,
.claude/exists) -> Runapm install. - Ambiguous Target? -> (No signals) ->
apm installwill exit with code 2; ask user for explicit--target(e.g.,agent-skills,claude,all). - Converged Skills? -> (Standard) -> Deploys to
.agents/skills/. Use--target agent-skillsfor explicit skill deployment. - Legacy Skills? -> (Per-client paths) -> Use
--legacy-skill-pathsflag. - Production/CI? -> Use
--frozenflag to ensure lockfile compliance.
Workflow
- Verify
apm.ymlexistence (locally or at root). - Execute
python scripts/validate_apm_package.py. - Select Execution Context:
- For project-wide use:
cd <repo-root> - For local test:
cd <package-dir>
- For project-wide use:
- Preview with
apm install [--target <slug>] --dry-run --verbose. - Run
apm install [./relative-path-to-pkg] [--target <slug>] [--legacy-skill-paths].- Use
--target all,agent-skillsto deploy to all harnesses AND converged skills.
- Use
- Verify
apm.lock.yamlupdate at the execution root.
What ships with it
4 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.
- 4d ago First seen · 53 lines · 69 tokens per session scan A 858c5111a157
install-apm-package is a skill published in the GitHub repository richfrem/agent-plugins-skills (6 stars, last pushed today), licensed MIT. It adds 69 tokens to every session and 809 once invoked, about $0.0003 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 2026-09-03.
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