Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/synaptiai/prompt-decoratorsnpx agentmods add skills/synaptiai/prompt-decorators/authoring-decoratorsWrote 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/synaptiai/prompt-decorators/authoring-decorators)<a href="https://agentmods.dev/skills/synaptiai/prompt-decorators/authoring-decorators"><img src="https://agentmods.dev/badge/skills/synaptiai/prompt-decorators/authoring-decorators/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/synaptiai/prompt-decorators/authoring-decorators"><img src="https://agentmods.dev/badge/skills/synaptiai/prompt-decorators/authoring-decorators.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
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 →
- high Anti-Refusal · line 156 Skill instructs the agent to omit warnings, disclaimers, or ethical commentary. Stripping safety caveats hides risk from the user and is a common jailbreak preamble.Fix: Remove instructions that suppress warnings, disclaimers, or ethical commentary. Let the agent surface safety-relevant caveats to the user.
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 | $0.00072 | $0.04003 |
| Opus 5.5 | $0.00029 | $0.01601 |
| Sonnet 5.5 | $0.00014 | $0.00801 |
| Haiku 4.5 | $0.00007 | $0.00400 |
Grade A, and why
authoring-decorators 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 1mo 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 — 399 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authoring Decorators
This skill guides creation of a new decorator: where the JSON file lives,
what fields it needs, and how to verify it works end-to-end via the
UserPromptSubmit hook.
Prerequisites
- The
prompt-decoratorsplugin is installed. - The user has a concrete behaviour they want a decorator to codify (e.g., "always format output as XML", "always include confidence intervals").
- Write access to
$HOME/.config/prompt-decorators/extensions/for personal decorators, OR write access to the upstreamsynaptiai/prompt-decoratorsrepo for contributions back.
Workflow
Use TodoWrite to track these mandatory steps:
Step 1: Decide destination
Two legitimate destinations exist, and choosing wrong loses your work:
| Use case | Destination | Survives vendor sync? |
|---|---|---|
| Personal decorator for your workflow | $HOME/.config/prompt-decorators/extensions/<your-namespace>/<name>.json (or set PROMPT_DECORATORS_USER_REGISTRY to a path of your choice) |
Yes - independent of plugin |
| Contribution back to the shared catalogue | Upstream repo synaptiai/prompt-decorators/registry/extensions/<namespace>/<name>.json, open a PR, then re-sync the vendor (see claude-code-plugin/VENDORING.md) |
Yes - becomes part of upstream |
Do NOT place personal decorators under
claude-code-plugin/vendor/prompt_decorators/registry/. The vendored
copy is periodically wiped and re-synced from upstream (see
claude-code-plugin/VENDORING.md), so anything under vendor/ that
isn't in the source-of-truth upstream repo gets silently deleted on the
next sync.
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.
- 1mo ago First seen · 399 lines · 72 tokens per session scan A 9e564da096c4
authoring-decorators is a skill published in the GitHub repository synaptiai/prompt-decorators (44 stars, last pushed yesterday), licensed Apache-2.0. It adds 72 tokens to every session and 4,003 once invoked, about $0.0003 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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