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 joenandez/spectre --skill spectre-prototypegit clone --depth 1 https://github.com/joenandez/spectreWrote 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/joenandez/spectre/spectre-prototype)<a href="https://agentmods.dev/skills/joenandez/spectre/spectre-prototype"><img src="https://agentmods.dev/badge/skills/joenandez/spectre/spectre-prototype.svg" alt="Measured on agentmods" 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 | $0.00054 | $0.01252 |
| Opus 5 | $0.00027 | $0.00626 |
| Sonnet 5 | $0.00011 | $0.00250 |
| Haiku 4.5 | $0.00005 | $0.00125 |
Grade A, and why
spectre-prototype 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 2d 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
prototype
Purpose
Produce one HTML prototype at {FEATURE_ROOT}/prototypes/{slug}_{MMDDYY}.html. The primary owns it; agents provide evidence only.
Inputs
$ARGUMENTS: feature root/name or descendant, description, optional--explore; markersFROM_UX=true,FROM_KICKOFF=true.- Read existing
concepts/scope.md,specs/prd.md,ux.md, then legacyspecs/ux.mdfully before questions. - Silently read repo-root
product.mdwhen present, plusdesign.mdor fallbackdesign/design.md; apply them; do not mention missing files.
| Mode | Signal | Fidelity | Contract |
|---|---|---|---|
post-ux |
complete ux.md: Screens, Layouts, Components, Interactions, States, Content |
high | render faithfully; exact documented copy; no invented screens |
flows-only ux |
FROM_UX=true or flows without complete Stage 2 |
mid | preserve approved flows; choose UI details |
explore |
--explore |
low, grayscale/layout-only | visualize an unvalidated concept |
post-scope |
scope, no UX | mid | validate scope |
standalone |
no artifact | mid | establish what to prototype |
Working Set
- Reuse a managed
FEATURE_ROOTonly when explicit/current-thread evidence ties it to this work (physical directory wins; never branch/recency/lifecycle/scans); distinct work ignores ambient roots. Otherwise, including on collision, standalone MUST first load and followSkill(spectre-feature-root)through DONE; orchestrated calls escalate. Keep writes beneath it and pass it unchanged. - Repair stale feature/root metadata in artifacts this workflow touches.
Outputs + DONE
The single HTML file contains:
<!DOCTYPE html>, viewport metadata, inline CSS, and inline end-of-body JavaScript.- A top-of-head comment beginning
Feature:andFeature Root:, followed by Fidelity, Generated, Flow covered, Screens/states, Visual anchor, Source spec, Key assumptions, post-UX Filled assumptions, NOT included, and Next step. - A design-token comment for Primary, Accent, Surface, Text, Font, Border-radius, Spacing, mirrored as
:rootcustom properties. - If multi-screen, vanilla-JS
display:block/nonenavigation; one ordered<section>per screen, each with happy path plus an empty, error, or loading state.
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.
- 2d ago Changed b6b07c1c1fe8
- 8d ago First seen · 68 lines · 54 tokens per session scan A 0ce7c932ada7
spectre-prototype is a skill published in the GitHub repository joenandez/spectre (158 stars, last pushed today), licensed MIT. It adds 54 tokens to every session and 1,252 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 2026-08-30.
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