jshell SKILL.md skillA
jshell from heapy/kortex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add heapy/kortex/jshell@git:20260824.2e9d560Pins git:20260824.2e9d560 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- heapy/kortex
- Path
plugins/kortex/skills/jshell/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260824.2e9d560, committed Aug 24, 2026
- Size
- 2,080 bytes
- Repository stars
- 7
- License
- Apache-2.0
Use when running Java snippets in JShell or using JShell as a Java REPL or scratchpad.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# JShell Run JShell in an agent-controlled terminal and own its lifecycle. Record its pid when it starts, keep the terminal session, and do not finish the task until that session has exited. ## Resolve the executable Run `jshell --version` before the first evaluation. On macOS, `/usr/bin/jshell` can be a launcher that reports no Java runtime even when an SDK-managed JDK is installed. In that case, resolve an installed JDK and use its absolute `bin/jshell` path for the rest of the task. If a requested JShell option is uncertain, inspect that executable's `--help` or `--help-extra`. ## Start and use JShell Start this command in a terminal with TTY enabled, replacing the final argument with the resolved absolute path: ```sh /bin/sh -c 'printf "JSHELL_PID=%s\n" "$$" >&2; exec "$1" --execution local --feedback concise' sh /absolute/path/to/jshell ``` Save both the returned terminal-session id and the printed `JSHELL_PID`. `exec` replaces the shell with JShell without changing the pid, while `--execution local` keeps evaluation in that tracked process. Send Java snippets to the terminal session with a trailing newline. Poll a running session with an …
Read the whole file at its exact version.
How to install
mdr add heapy/kortex/jshell@sha256:bbd745316aa5381aThe line at the top of this page pins the label git:20260824.2e9d560, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6osexkkn6h242dzt)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 24, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2080 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
heapy/kortex · 7 stars · license Apache-2.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6osexkkn6h242dzt GET https://markdownregistry.com/api/v1/resolve?ref=heapy/kortex/jshell GET https://markdownregistry.com/api/v1/blob/bbd745316aa5381adc83b5bfdf8b7793ac858f4a043cd3423112f73a3780a815
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.