Guidewire Local Dev Loop

What it does

When your agent uses it

• Standing up Guidewire Studio against a local InsuranceSuite instance
• Attaching an IntelliJ remote debugger to runServer
• Distinguishing changes that hot-reload from changes that force restart
• Building a GUnit-driven TDD cycle for rule logic

Example prompts

• “guidewire studio”
• “gosu hot reload”
• “gosu debugger”
• “/guidewire-local-dev-loop”

Requirements

• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(gradle:*), Bash(java:*), Bash(jdb:*), Grep, Glob

Workflow steps

5 steps, taken from the step headings in SKILL.md.

1. 1Start runServer once, keep it warm
2. 2What hot-reloads, what does not
3. 3Attach the IntelliJ debugger once per session
4. 4GUnit cycle for rule TDD
5. 5Sample data isolation per session

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves these tools, so the agent can use them without asking each time:

  • Read
  • Write
  • Edit
  • Bash(gradle:*)
  • Bash(java:*)
  • Bash(jdb:*)
  • Grep
  • Glob

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • gradle
  • git

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • developer.guidewire.com
  • gosu-lang.github.io
  • docs.oracle.com
  • docs.gradle.org

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Guidewire Local Dev Loop loads about 2.6k tokens when it runs, and up to ~5.2k if it reads all its reference files. Until then it costs about 122 tokens; SKILL.md has 1,041 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~122

When it runs · the whole SKILL.md, loaded when a task matches

~2.6k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~5.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 1,041 words, ~2,585 tokens.

name

guidewire-local-dev-loop

description

Iterate on Gosu rules and configuration without paying the full 5–15 minute runServer rebuild every time. Use when standing up Guidewire Studio against a local InsuranceSuite instance, attaching an IntelliJ remote debugger to runServer, distinguishing changes that hot-reload from changes that force restart, or building a GUnit-driven TDD cycle for rule logic. Trigger with "guidewire studio", "gosu hot reload", "gosu debugger", "gunit", "guidewire runServer".

allowed-tools

Read, Write, Edit, Bash(gradle:*), Bash(java:*), Bash(jdb:*), Grep, Glob

compatibility

Designed for Claude Code

version

1.26.0

license

MIT

author

Jeremy Longshore <jeremy@intentsolutions.io>

tags

guidewire, gosu, studio, hot-reload, gunit, debugging

# Start in dev mode with debug agent on 8088, leaves the server attached to the terminal
./gradlew runServer -Pdebug=true -PdebugPort=8088 -Dgw.servermode=dev

Run > Edit Configurations > + > Remote JVM Debug
  Host: localhost
  Port: 8088
  Module classpath: <your-config-module>
  Save → run with the bug icon

# Run a single GUnit test class
./gradlew test --tests "com.acme.policycenter.rules.UnderwritingIssueRuleTest"

# Run all rule tests in a package, with continuous re-run on change
./gradlew test --tests "com.acme.policycenter.rules.*" --continuous

# Load the standard sample, then a project-specific overlay
./gradlew loadSampleData -PsampleData=default -PsampleData=acme-uat-fixtures runServer

1. Edit rule body in modules/configuration/gsrc/.../UnderwritingIssueRules.gs
2. Save (Ctrl-S)
3. Trigger the rule (issue a quote in the running PC instance)
4. Breakpoint hits the new line numbers; rule fires with new logic
5. Total time from save to confirmation: <10 seconds

1. Modify interface in modules/configuration/gsrc/.../IPolicyCalculator.gs
2. Recognize this is in the no-hot-reload row of the table
3. Stop runServer (Ctrl-C); start ./gradlew runServer -Pdebug=true -PdebugPort=8088
4. Wait ~8 minutes; reattach debugger
5. Resume work — accept the cost rather than chasing phantom bugs from stale bytecode

# Terminal 1: continuous test runner
./gradlew test --tests "com.acme.policycenter.validation.HighValueAccountValidatorTest" --continuous

# Editor: write the failing test first, watch it fail in <5s
# Implement the rule, watch the test pass in <5s
# Commit when green; do not run the full server until the rule is locked

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in skills/.curated/guidewire-local-dev-loop of jeremylongshore/tons-of-skills-marketplace.

• SKILL.md
• references/API_REFERENCE.md
• references/implementation-guide.md

Open the folder on GitHubat commit cfae287