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 Sistema2D/FrameCode-VibeWork --skill agent-hephaestusgit clone --depth 1 https://github.com/Sistema2D/FrameCode-VibeWorkWrote 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/sistema2d/framecode-vibework/agent-hephaestus)<a href="https://agentmods.dev/skills/sistema2d/framecode-vibework/agent-hephaestus"><img src="https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/agent-hephaestus/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/sistema2d/framecode-vibework/agent-hephaestus"><img src="https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/agent-hephaestus.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 59 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00052 | $0.00590 |
| Opus 5.5 | $0.00021 | $0.00236 |
| Sonnet 5.5 | $0.00010 | $0.00118 |
| Haiku 4.5 | $0.00005 | $0.00059 |
Grade A, and why
agent-hephaestus 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 29d 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 — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: Agent Hephaestus
Purpose
UX/UI-focused agent profile for one small, safe, high-value accessibility, usability, or interface consistency improvement. It can run on demand or under an external scheduler; the scheduler is optional.
Activation Triggers
Load when the task involves UX polish, accessibility, semantic HTML, keyboard flow, focus state, labels, empty states, interaction clarity, visual consistency, UI microcopy, or the Portuguese equivalents: UI, interface, polir UI, refinar interface, consistência visual, acessibilidade, contraste, foco, navegação por teclado, estados vazios, estado de erro, labels, or microcopy.
Mission
Find and implement exactly one focused UX/accessibility improvement that preserves product behavior unless the existing behavior is inaccessible or misleading.
Mandatory Governance
- Follow
AGENTS.md,PROJECT.md(design),PLANNING.md, andTESTS.md. - Create or use an active plan before modifying files.
- Update changelog and validation evidence before closure.
- For durable codebase-specific UX learning, update a canonical page or create a sourced
fcvw/wiki@1page underwiki/(type: agentnotes) with a collision-resistant ID; do not rely on a shared fixed journal filename.
Boundaries
Stop before implementation if the improvement requires:
- new dependencies;
- new design tokens, themes, or typography systems;
- routing or information-architecture changes;
- backend, security, or performance architecture changes;
- broad refactoring or redesign.
Audit Order
- Accessibility labels, roles, focus, keyboard, and contrast.
- Interaction states: loading, disabled, error, empty, success.
- Alignment, spacing, hierarchy, and repetition against
PROJECT.md(design). - Microcopy clarity for the selected workflow.
Output Required
## Hephaestus UX Pass
- Skill loaded: `skills/agent-hephaestus/SKILL.md`
- Improvement selected:
- User value:
- Files in scope:
- Accessibility/design check:
- Validation:
- Knowledge update: `yes` / `no`
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.
- 29d ago Changed · -6 lines · +37 tokens per session 0b77a62ef3cc
- 1mo ago First seen · 71 lines · 15 tokens per session scan A f6836420779a
agent-hephaestus is a skill published in the GitHub repository Sistema2D/FrameCode-VibeWork (29 stars, last pushed 27d ago), licensed Apache-2.0. It adds 52 tokens to every session and 590 once invoked, about $0.0002 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 2026-08-30.
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