--json
A Claude Code CLI flag, read out of the shipped bundle. It has been in the build since v2.1.138, including the newest one read.
What it is
Plugin eval JSON output is validated before printing, and suppressed with a stderr warning if invalid.
Not Anthropic's. This is the line from the earliest changelog entry here that named it, v2.1.224.
Presence across releases
| Releases | Reading | Declared type | Default |
|---|---|---|---|
| 2.1.245 – 2.1.250 5 releases | never mined | — | — |
| 2.1.138 – 2.1.243 95 releases | in the build | — | — |
A row reading never mined is a release with no archived bundle behind it. Nothing was read out of it, so nothing here says whether the name was in it. A declared type or a default is only ever what that release's own bundle stated.
Changelog entries naming it
-
v2.1.246
claude plugin listnow shows bundled plugins tooclaude plugin list now shows bundled first-party plugins alongside the ones you installed.
named in this entry
-
v2.1.224Plugin eval can validate and report its own JSON output
Plugin eval JSON output is validated before printing, and suppressed with a stderr warning if invalid.
named in this entry
Documentation pages
- task-budgets mentions it Claude Developer Platform
- DCF Model Rubric mentions it Claude Developer Platform
- files mentions it Claude Developer Platform
- migration mentions it Claude Developer Platform
- skills mentions it Claude Developer Platform
- Manage multiple agents with agent view mentions it Claude Code CLI
- Claude Code changelog mentions it Claude Code CLI
- CLI reference mentions it Claude Code CLI
- Error reference mentions it Claude Code CLI
- Run Claude Code programmatically mentions it Claude Code CLI
- Constrain plugin dependency versions mentions it Claude Code CLI
- Create and distribute a plugin marketplace mentions it Claude Code CLI
A reference table page is one whose own table defines this name, and it is where the description above came from. A page that mentions it carries the name somewhere in its text and may say nothing about it at all. Every page carrying it.
Read out of the published npm bundle release by release, and out of Anthropic's own documentation as this site captured it. Nothing on this page is a description anybody here wrote about what the CLI flag does. All CLI flags.