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.
/plugin marketplace add justjammin/prompernpx agentmods add plugins/justjammin/promper/marketplacegit clone --depth 1 https://github.com/justjammin/promperGrade A, and why
promper marketplace 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
The plugins it lists here
This marketplace lists 1 plugin kept in the same repository. Each has its own page, its own measurements and its own install command.
What ships with it
1 file beside marketplace.json 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 First seen · 18 lines scan A f3e67e5e393a
promper marketplace is a plugin published in the GitHub repository justjammin/promper (2 stars, last pushed 18d ago), with no licence file. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.
Other plugins, from other repositories
text-analyst
Computational text analysis using R or Python. Topic models (LDA, STM, BERTopic), sentiment analysis, classification, and embeddings with systematic validation.
fabric-cli
Connect to, read, and modify anything in Fabric via the CLI.
magic-words
Finds the named technique your problem needs and folds its phrasing into the request before the work starts. Hundreds of named techniques, ranked locally, no network.
prompt-utils
Prompt-crafting utilities: /expertify rewrites a lay prompt with the precise professional role and domain terminology, /interview probes until your real intent is clear, /thought captures surprising model answers, /repo-scout breaks down any GitHub repo into reusable parts.
llm-engineering-skills marketplace
Plugin marketplace listing 1 plugin: llm-engineering-skills.
prompt-analyzer
Analyzes and coaches how the user writes prompts, measured against Anthropic's prompt-engineering standards, with persistent per-session statistics.