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 maksutovic/joycraft --skill joycraft-add-contextgit clone --depth 1 https://github.com/maksutovic/joycraftWrote 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/maksutovic/joycraft/joycraft-add-context)<a href="https://agentmods.dev/skills/maksutovic/joycraft/joycraft-add-context"><img src="https://agentmods.dev/badge/skills/maksutovic/joycraft/joycraft-add-context/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/maksutovic/joycraft/joycraft-add-context"><img src="https://agentmods.dev/badge/skills/maksutovic/joycraft/joycraft-add-context.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00036 | $0.01205 |
| Opus 5 | $0.00018 | $0.00602 |
| Sonnet 5 | $0.00007 | $0.00241 |
| Haiku 4.5 | $0.00004 | $0.00120 |
Grade A, and why
joycraft-add-context 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 today.
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 — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
At skill entry, run node docs/.joycraft/check.mjs check --json --session <session-id> once, reusing JOYCRAFT_SESSION_ID if supplied or one ID chosen for this conversation. If the checker is missing or fails, continue the requested skill quietly without retrying setup. Offer updates only for display: true; current, postponed, off, and unknown stay quiet. If automaticUpdate is present, finish this skill, then run its exact command once from the project root: the candidate must verify every safety gate before applying. Other updates require approval. After an offer or automatic attempt, record it with node docs/.joycraft/check.mjs acknowledge <available-version> --session <session-id>. Apply updates only at this workflow boundary; after success, reinvoke the skill or restart the session to load changed instructions.
Add Context
The user wants to author ONE long-form reference doc — a design system, a frontend or backend methodology, testing conventions, or any other long-form reference for this project. Your job is to scaffold that doc from the matching template, fill in what the user has told you, write it immediately, and wire a pointer row into AGENTS.md's ## Context Map.
This is the single-doc primitive. Write-as-you-go is correct here: you scaffold and write ONE doc per invocation, immediately — not a batch.
This skill is self-contained. Everything you need is below; do not call into or import another skill's logic.
Step 1: Determine Topic and Slug
Figure out what reference doc the user wants. If they named it (e.g., $joycraft-add-context our design system), use that. Otherwise ask: "What reference doc do you want to author?" — then wait.
Derive a kebab-case <slug> from the topic (e.g., "our design system" → design-system, "payments service backend" → payments-backend).
Step 2: Pick the Matching Template
Choose the bundled template in docs/templates/context/reference/ that best fits the topic:
| Topic | Template |
|---|---|
| Design system, tokens, components, visual language | design-system.md |
| Frontend architecture, state, folder conventions, patterns | frontend-methodology.md |
| Service boundaries, API conventions, data model, errors | backend.md |
| Test pyramid, frameworks, fixtures, CI gates | testing.md |
| Anything else not covered above | reference-doc.md (generic fallback) |
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.
- today Changed · +2 lines 3552459f82ba
- 8d ago First seen · 89 lines · 36 tokens per session scan A 524cebc35209
joycraft-add-context is a skill published in the GitHub repository maksutovic/joycraft (15 stars, last pushed today), licensed MIT. It adds 36 tokens to every session and 1,205 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.
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