Crate wyvern 

Wyvern CLI library — load → validate → run → emit pipeline.

main.rs is a thin binary wrapper around pipeline::run_from_loaded.

Structs

CliArgs

Parsed CLI invocation: host options + remaining positional/stdin args.

Enums

BrowsersError

CLI browsers subcommand failure.

EmitError

Failure serializing stdout or structured stderr JSON at the CLI emit boundary.

LoadError

Failure while loading command input from argv or stdin.

PipelineError

Pipeline failure after load: stage stderr + exit, or emit-boundary serialize failure.

ViewerSpawnError

Failure locating or launching wyvern-viewer.

Functions

emit_fatal_internal

Emit static internal stderr JSON and exit with code 8 (REQ-0078).

emit_host_error

Serialize a wyvern_host::HostError as stderr JSON (REQ-0073).

emit_io_error

Serialize an I/O load error as stderr JSON.

emit_parse_error

Serialize a parse load error as stderr JSON.

emit_stdout

Serialize a successful wyvern_schema::CommandResult for stdout.

emit_validation_error

Serialize a validation/state error as stderr JSON.

load_command_input

Load a command Value from positional args or stdin.

parse_cli_args

Split argv into host flags and positionals.

resolve_viewer_bin

Resolve wyvern-viewer via sibling → CARGO_BIN_EXE → WYVERN_VIEWER_BIN → PATH.

run_browsers_command

Run a browsers subcommand; returns stdout text on success.

run_from_loaded

Validate value, run the host, and return stdout JSON on success.

spawn_embedded_viewer

Spawn wyvern-viewer for dialog_url with optional size hints.

usage_message

Canonical usage text for invalid argv / empty stdin.