JDK 25 Upgrade Blocker Lint

Finds the Java lines the new LTS removed — 18 rules; 23 findings in one 64-line fixture

Install

jdk25-upgrade-blocker-lint file

Node 18+. The same 18 rules as the VS Code extension, from a terminal or CI.

Free

• Lints the .java file you have open with all 18 rules, no key and no cap — the bundled 64-line fixture returns 23 findings, 15 errors and 8 warnings; the fixed copy returns 0.
• --rules lists every rule

With a licence ($29 once)

• Sweeps the whole workspace and writes the dated migration report file — every file, blocker, JEP and replacement — for the upgrade ticket; free for the first 7 days, then one key, commercial and CI-seat use included.

@readystack/jdk25-upgrade-blocker-lint --dir ./templates --report html --out report.html

A Java migration consultant bills $120-$200 an hour; a two-day audit of one repo is over $2,000.

Use from an AI agent (MCP)

Claude Code · Cursor · Windsurf · any MCP client - add to your MCP config:

{ "mcpServers": { "jdk25-upgrade-blocker-lint": { "command": "npx", "args": ["-y", "@readystack/jdk25-upgrade-blocker-lint", "--mcp"] } } }

Tools: check_text and check_file (free) · check_dir (licence; the full sweep is free for 7 days). The agent gets every finding with the line number.

Use in CI

- name: JDK 25 Upgrade Blocker Lint
  run: npx -y @readystack/jdk25-upgrade-blocker-lint --dir . --ci

(container: docker run --rm -v "$PWD:/work" getreadystack/jdk25-upgrade-blocker-lint --dir /work --ci)

Try the full run free for 7 days — no key needed. Then one licence, 7-day refund, no questions. Set READYSTACK_LICENSE=<key> or run --license <key> once.

Get a licence

Install (PyPI)

pip install readystack-jdk25-upgrade-blocker-lint
jdk25-upgrade-blocker-lint --help