JSON output and errors

Use machine-readable output and process exit codes for automation. Human-readable messages may evolve; JSON codes and structured results are the stable integration surface.

Single-document output

Site, file, and download commands emit one JSON value with --json:

zynohosting sites list --json
zynohosting files list example.com --json
zynohosting download example.com ./copy --yes --json

Errors are written as one JSON object:

{
    "type": "error",
    "code": "precondition_failed",
    "message": "file precondition failed",
    "details": {
        "code": "precondition_failed",
        "message": "file precondition failed"
    }
}

Do not assume details is always present.

Deployment event stream

Deploy emits newline-delimited JSON because planning and applying have multiple stages:

zynohosting deploy example.com ./dist --dry-run --json

Event types are:

Type	Meaning
progress	A current planning or apply stage.
plan	Exact operations, display groups, counts, ignores, and upload bytes.
dry_run_complete	Planning completed without mutation.
result	Apply result with create/replace/delete counts and duration.
cancelled	Interactive apply was declined.

Consume one JSON object per line rather than parsing the complete standard output as a single document.

Exit codes

Exit code	Category
0	Success.
1	Unexpected CLI or runtime failure.
2	Invalid local input, unsafe path, configuration, or missing confirmation.
3	Authentication or authorization failure, including expired login.
4	Remote API failure or failed ETag/create-only precondition.
5	Invalid, incompatible, or unsafe manager/agent response.
6	Unknown or expired plan/session.
7	The node agent could not apply a deployment.
8	Mutation applied, but cache invalidation could not be queued.

Exit code 8

The remote mutation already succeeded. Do not blindly retry the deployment as though nothing changed; inspect the site and retry cache invalidation through an approved operational path.

Common error codes

Code	Typical resolution
missing_config	Run zynohosting login or provide an API key.
login_expired	Run interactive login again.
invalid_environment	Use production, alpha, or dev.
confirmation_required	Use a terminal, --dry-run, or reviewed --yes.
precondition_failed	Refresh the file listing and review the new ETag/content.
plan_expired	Create and review a new plan.
unsafe_local_path	Choose an absolute destination inside an allowed MCP root.
unsupported_protocol	Upgrade the CLI or resolve cluster version skew.
cache_invalidation_failed	Treat the mutation as applied and investigate cache invalidation.

Shell example

set +e
zynohosting files put example.com ./index.html index.html --json >result.json
status=$?
set -e

if [ "${status}" -ne 0 ]; then
  echo "ZynoHosting operation failed with exit code ${status}" >&2
  exit "${status}"
fi

When file content is streamed with files get --output -, standard output contains bytes and cannot also contain JSON.