agentmail-custom-commands

name	agentmail-custom-commands
description	How to author custom commands for the agentmail CLI using the co-generated SDK.

Custom Commands for agentmail

Overview

The agentmail CLI supports user-authored custom commands that are compiled into the binary alongside the auto-generated API commands. Custom commands get a fully-wired SDK client that inherits the CLI's auth, retries, TLS, base URL, and global headers — zero configuration required.

Architecture

cli/agentmail/custom.rs    ← Your command handlers (protected by .fernignore)
cli/agentmail/sdk_glue.rs  ← Generated bridge: sdk_client() + block_on()
cli/agentmail/main.rs      ← Generated entrypoint (calls custom::register)
agentmail-sdk/             ← Co-generated typed SDK crate
agentmail-types/           ← Co-generated typed model crate

Adding a Custom Command

1. Edit cli/agentmail/custom.rs

This file is protected by .fernignore — fern generate will never overwrite it. Register commands in the register() function:

use agentmail_sdk::api::*;

pub fn register(app: CliApp) -> CliApp {
    let app = app.command(
        clap::Command::new("get")
            .about("Get Inbox")
            .arg(clap::Arg::new("inbox_id").required(true))
        ,
        |matches, ctx| {
            let inbox_id = matches.get_one::<String>("inbox_id").unwrap();
            let client = super::sdk_glue::sdk_client(ctx);
            let result = super::sdk_glue::block_on(
                client.inboxes.get(inbox_id),
            )?;
            println!("{}", serde_json::to_string_pretty(&result).unwrap());
            Ok(())
        },
    );
    app
}

Then build and test:

cargo build
agentmail get <inbox_id>

2. Available SDK Clients

The sdk_glue::sdk_client(ctx) call returns a agentmail_sdk::api::Client with the following sub-clients:

Field	Type	Description
client.inboxes	agentmail_sdk::api::InboxesClient	inboxes operations
client.api_keys	agentmail_sdk::api::ApiKeysClient2	api_keys operations
client.drafts	agentmail_sdk::api::DraftsClient2	drafts operations
client.events	agentmail_sdk::api::EventsClient	events operations
client.lists	agentmail_sdk::api::ListsClient2	lists operations
client.messages	agentmail_sdk::api::MessagesClient	messages operations
client.metrics	agentmail_sdk::api::MetricsClient2	metrics operations
client.threads	agentmail_sdk::api::ThreadsClient2	threads operations
client.webhooks	agentmail_sdk::api::WebhooksClient2	webhooks operations
client.pods	agentmail_sdk::api::PodsClient	pods operations
client.api_keys	agentmail_sdk::api::ApiKeysClient3	api_keys operations
client.domains	agentmail_sdk::api::DomainsClient2	domains operations
client.drafts	agentmail_sdk::api::DraftsClient3	drafts operations
client.inboxes	agentmail_sdk::api::InboxesClient2	inboxes operations
client.lists	agentmail_sdk::api::ListsClient3	lists operations

3. Key Patterns

Get the SDK client (execution-sharing, fully authenticated):

let client = super::sdk_glue::sdk_client(ctx);

Run an async SDK call from a sync handler:

let result = super::sdk_glue::block_on(
    client.some_resource.some_method(args),
)?;

Use typed models for request/response serialization:

use agentmail_sdk::api::*;

4. Authentication

Custom commands automatically inherit the CLI's authentication. The following auth schemes are configured:

• BearerAuth (bearer): env AGENTMAIL_TOKEN

No manual auth wiring is needed in custom command handlers.

Regeneration Safety

File	Regenerated?	Notes
cli/agentmail/custom.rs	No	Protected by .fernignore
cli/agentmail/sdk_glue.rs	Yes	Bridges AppContext → SDK client
cli/agentmail/main.rs	Yes	Calls custom::register(app)
agentmail-sdk/	Yes	Co-generated typed SDK crate
agentmail-types/	Yes	Co-generated typed models

After running fern generate, your custom.rs is preserved. All generated code (SDK, types, glue, main.rs) is updated to match the latest API spec. If the SDK surface changes (renamed methods, new sub-clients), update your custom.rs to match.

Build & Test

# Build the CLI (includes custom commands)
cargo build

# Run your custom command
agentmail <your-command> [args]

# Run with verbose output for debugging
RUST_LOG=debug agentmail <your-command> [args]