A command for adding parts to a Go command-line application or its connection to the Nylas email and calendar API.

Use it when adding a CLI command, flag, API method, or domain type, then run the project's CI checks.

It provides project-specific steps and patterns so new commands, options, API methods, and data types fit the existing code structure.

add-command — Command by nylas

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add commands/nylas/cli/add-command

Clone the repo

git clone --depth 1 https://github.com/nylas/cli

Made for: Claude Code.

Per session 28 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 804 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00028	$0.00804
Opus 5	$0.00014	$0.00402
Sonnet 5	$0.00006	$0.00161
Haiku 4.5	$0.00003	$0.00080

Measured yesterday against content hash feb5f79441e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

add-command scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/commands/add-command.md · 119 lines

How it starts

The opening of the file, as written. The whole thing — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add CLI Component

Add commands, flags, API methods, or domain types following nylas CLI patterns.

API Reference: https://developer.nylas.com/docs/api/v3/

Scope

Task	What to do
New command	Full workflow below (domain → port → adapter → CLI → register)
New flag	Add var + `cmd.Flags().TypeVar()` + test + doc update
New API method	Steps 1-2 only (domain + adapter), skip CLI layer
New domain type	Step 1 only, see `references/domain-patterns.md`

Quick Start

Ask for: component type (command/flag/method/type), name, operations needed
Follow patterns in references/ directory
Run make ci to verify

Reference Files

File	When to Read
`references/domain-patterns.md`	Creating new domain types
`references/adapter-patterns.md`	Implementing API methods
`references/cli-patterns.md`	Building CLI commands

Read reference files ONLY when working on that specific layer.

Steps

1. Domain Layer (if new types needed)

Create internal/domain/{resource}.go
Add tests to internal/domain/domain_test_basic.go

2. Adapter Layer (if new API methods needed)

Update internal/ports/nylas.go with interface methods
Create internal/adapters/nylas/{resource}.go
Update internal/adapters/nylas/mock_{resource}.go

3. CLI Layer

Create internal/cli/{resource}/ directory
Add: {resource}.go, list.go, show.go, create.go, helpers.go
Add tests: {resource}_test.go

4. Registration

Update cmd/nylas/main.go to add the command

5. Verify

make ci

Common Patterns

Context: 30s timeout for API calls
Format flag: --format with table, json, yaml
Spinner: Use pterm spinner for long operations
Errors: Wrap with fmt.Errorf("context: %w", err)

For Full CRUD Commands

When creating a complete resource with list, show, create, update, delete:

Read the full file on GitHub · 119 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 119 lines · 28 tokens per session scan A feb5f79441e7

Subscribe to this mod's changes

add-command is a command published in the GitHub repository nylas/cli (68 stars, last pushed 13d ago), licensed MIT. It adds 28 tokens to every session and 804 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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add-command