Borrowing it
Nothing to install: this file belongs to lennix1337/Genexus18MCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/lennix1337/Genexus18MCP/main/.gemini/skills/genexus-mastery/SKILL.mdgit clone --depth 1 https://github.com/lennix1337/Genexus18MCPWrote 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/lennix1337/genexus18mcp/genexus-mastery)<a href="https://agentmods.dev/skills/lennix1337/genexus18mcp/genexus-mastery"><img src="https://agentmods.dev/badge/skills/lennix1337/genexus18mcp/genexus-mastery/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/lennix1337/genexus18mcp/genexus-mastery"><img src="https://agentmods.dev/badge/skills/lennix1337/genexus18mcp/genexus-mastery.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 10 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 | $0.00025 | $0.01937 |
| Opus 5 | $0.00013 | $0.00968 |
| Sonnet 5 | $0.00005 | $0.00387 |
| Haiku 4.5 | $0.00003 | $0.00194 |
Grade A, and why
GeneXus MCP Mastery 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 — 95 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GeneXus MCP Mastery
Use this skill to interact with the GeneXus KB through the MCP server in this repository.
Coordination with Specialized Skills
When working on complex GeneXus tasks, coordinate this "Transport" skill with "Knowledge" skills (imported from genexuslabs/genexus-skills — see .gemini/skills/NOTICE.md):
- Nexa: Authoritative reference set for GeneXus 18 objects, commands, types, properties, and modeling rules (
object-*.md,common-*.md,properties-*.md,global-*.md). Load on demand — keep context minimal. - GeneXus 18 Guidelines: Local conventions and engineering rules layered on top of Nexa.
- Chameleon Controls Library: 58 web-component docs for Chameleon UI elements.
- Mercury Design System: Mercury tokens, bundles, icons, theming.
- Design System Builder: Authoring custom design systems for KBs.
- UI Creator: Templates for generating GeneXus panels and screens.
Preferred Workflow
- Search: Use
genexus_queryto find entry points. - Read: Use
genexus_readorresources/readto get source/metadata. - Plan: Apply rules from GeneXus 18 Guidelines or Nexa to design the solution.
- Edit: Use
genexus_editfor focused changes (singularnameortargets[]for multi-object atomic edits). - UI/UX: If the task involves screens, apply Frontend Skills for modern aesthetics.
- Validate: Use
genexus_lifecycleto build and verify.
Multi-KB (v2.3.0+)
The server can hold multiple KBs open at once (Server.MaxOpenKbs, default 3), each in its own Worker process. Cross-KB tool calls run in parallel — intra-KB calls remain serialized by the SDK's STA constraint.
- Every non-meta tool accepts an optional
kbargument: an alias declared inconfig.Environment.KBs[]or an absolute path. When exactly one KB is open and nokbis given, that KB is used; with 2+ open thekbarg becomes required (KB_AMBIGUOUS). genexus_kb action=listreturns open KBs with PID, working-set memory, and idle seconds — use it to decide when to free a slot before opening a new KB.genexus_kb action=open(alias and/or path) acquires a Worker on demand;action=closereleases it;action=set_defaultpersistsDefaultKbtoconfig.json.- Legacy single-KB configs (
Environment.KBPath) auto-migrate toKBs[]+DefaultKbat load time; existing flows keep working unchanged.
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 ba34ba5fdbe5
- 12d ago First seen · 95 lines · 25 tokens per session scan A 464a4dea21ca
GeneXus MCP Mastery is a skill published in the GitHub repository lennix1337/Genexus18MCP (30 stars, last pushed today), licensed MIT. It adds 25 tokens to every session and 1,937 once invoked, about $0.0001 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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