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/simota/agent-skills/hearthnpx skills add simota/agent-skills --skill hearthgit clone --depth 1 https://github.com/simota/agent-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/simota/agent-skills/hearth)<a href="https://agentmods.dev/skills/simota/agent-skills/hearth"><img src="https://agentmods.dev/badge/skills/simota/agent-skills/hearth.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 | $0.00049 | $0.05711 |
| Opus 5 | $0.00024 | $0.02856 |
| Sonnet 5 | $0.00010 | $0.01142 |
| Haiku 4.5 | $0.00005 | $0.00571 |
Grade A, and why
hearth 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 5d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- hearth — 95% identical, 14 lines differ
How it starts
The opening of the file, as written. The whole thing — 296 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Hearth
Personal environment craftsman for developer dotfiles and local tooling. Configure one scope per session by default: one shell, one terminal, one editor, one prompt/tmux stack, or one dotfile-management task, unless the user explicitly asks for a coordinated multi-tool setup.
What ships with it
20 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.
- ARCHIVED_2026-08-19.md 1.1 KB
- reference/applescript-patterns.md 3.6 KB
- reference/autorun-schema.md 627 B
- reference/dotfile-management.md 8.4 KB
- reference/dotfile-security-anti-patterns.md 5.7 KB
- reference/editor-configs.md 11 KB
- reference/editor-terminal-anti-patterns.md 5.2 KB
- reference/environment-workflow-anti-patterns.md 5.3 KB
- reference/git-personal-config.md 6.3 KB
- reference/jxa-guide.md 2.6 KB
- reference/osascript-integration.md 3.2 KB
- reference/permissions-tcc.md 3.2 KB
- reference/safety-and-testing.md 2.9 KB
- reference/shell-config-anti-patterns.md 5.0 KB
- reference/shell-configs.md 6.0 KB
- reference/shellfn-functions-env.md 6.7 KB
- reference/terminal-configs.md 5.5 KB
- reference/tmux-starship.md 4.5 KB
- reference/ui-scripting.md 2.6 KB
- reference/vscode-editor-config.md 6.4 KB
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.
- 5d ago First seen · 296 lines · 49 tokens per session scan A b90216637440
hearth is a skill published in the GitHub repository simota/agent-skills (75 stars, last pushed 3d ago), licensed MIT. It adds 49 tokens to every session and 5,711 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 2026-08-30.
Other skills, from other repositories
computer-use
Read and drive native desktop applications through the accessibility layer — list on-screen apps, snapshot one window as a numbered element tree, then click / type / set a value / scroll / drag / run a named action, by element index or by screen coordinates. Use for work in a desktop app rather than a web page. Full…
tutti-workspace-app-factory
Create, convert, or repair one Tutti workspace app as either a self-contained publishable package under package/ or a Chrome-style local debug app under .tutti/dev-app/. Use for mention://workspace-app-factory/create handoffs, mention://workspace-app-factory handoffs, standalone app generation, adapting existing…
tutti-record-agent-session-replay
From a Tutti checkout, run, audit, freshly replay, publish, or diagnose Session Replay cassettes that are driven by case-repository scenario scripts (CDP), not by interactive UI recording. Use for real-Provider capture while a scenario.mjs executes, cassette transport or semantic-state mismatches, fresh replay…
context-preservation
State capture and restore across context window compactions. Monitors usage thresholds and serializes quality, task, and spec state for seamless continuation.
cog-braindump-capture
Capture raw thoughts with automatic domain classification and vault routing.
cog-knowledge-consolidation
Build structured knowledge frameworks from scattered vault notes with source attribution.