generate-spec

generate-spec is a command for Claude Code from jnarowski/agentcmd. It costs 14 tokens per session (3,278 once invoked), scanned C, original, MIT.

A command that turns a feature idea into a numbered implementation plan with complexity estimates, file paths, tests, and acceptance checks.

In plain words
What is it for?
Use it to plan a feature from requirements through implementation and testing, with the result saved as a Markdown spec.
Why use it?
It removes the need to structure feature work manually before coding and makes dependencies and verification steps explicit.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: positional $N argument.

Good fit Use it to plan a feature from requirements through implementation and testing, with the result saved as a Markdown spec.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/jnarowski/agentcmd/generate-spec
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.

Clone the repo
git clone --depth 1 https://github.com/jnarowski/agentcmd

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for generate-spec

README.md
[![agentmods](https://agentmods.dev/badge/commands/jnarowski/agentcmd/generate-spec/github.svg)](https://agentmods.dev/commands/jnarowski/agentcmd/generate-spec)
Your own site
<a href="https://agentmods.dev/commands/jnarowski/agentcmd/generate-spec"><img src="https://agentmods.dev/badge/commands/jnarowski/agentcmd/generate-spec/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for generate-spec

Your own site · 80×15
<a href="https://agentmods.dev/commands/jnarowski/agentcmd/generate-spec"><img src="https://agentmods.dev/badge/commands/jnarowski/agentcmd/generate-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,278 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00014 $0.03278
Opus 5.5 $0.00006 $0.01311
Sonnet 5.5 $0.00003 $0.00656
Haiku 4.5 $0.00001 $0.00328

Measured 1mo ago against content hash c4f7eb6d2fff, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

generate-spec scanned grade C with 1 finding 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 1mo ago.

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.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

<!-- prettier-ignore -->
packages/agentcmd-workflows/templates/.claude/commands/cmd/generate-spec.md · 425 lines

How it starts

The opening of the file, as written. The whole thing — 425 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Generate Implementation Spec with Complexity

Generate a well-structured implementation spec with complexity estimates and save it to .agent/specs/todo/[id]-[feature]/spec.md with timestamp-based ID.

Variables

  • $context: $1 (optional) - Additional context for autonomous spec generation (e.g., "Add OAuth support with Google and GitHub providers")

Instructions

  • IMPORTANT: Use your reasoning model - THINK HARD about feature requirements, design, implementation approach, AND complexity
  • Normalize feature name to kebab-case for the folder name
  • Replace ALL <placeholders> with specific details relevant to that section
  • Create detailed step-by-step tasks grouped logically (e.g., by phase, component, or feature area)
  • Assign complexity score (1-10) to EVERY task based on context needs (see Complexity Scale below)
  • Order tasks by dependencies (foundation → core → integration)
  • Include specific file paths, not generic names
  • Make all commands copy-pasteable with expected outputs
  • Include comprehensive verification covering build, tests, linting, and manual checks
  • Add E2E test tasks if feature has UI
  • Keep acceptance criteria measurable
  • DO NOT include hour-based estimates anywhere - use complexity points only

Complexity Scale (Context-Focused)

Assign complexity based on context window usage and cognitive load, not time:

  • 1-2/10: Trivial - Single file, <50 lines changed, minimal context (config, doc, simple type)
  • 3-4/10: Simple - Few files, straightforward logic, low context (single endpoint, basic component)
  • 5-6/10: Moderate - Multiple related files, moderate context (DB field + migration + API update)
  • 7-8/10: Complex - Cross-cutting change, high context, multiple domains (full-stack feature, state refactor)
  • 9-10/10: Very complex - Architectural change, deep codebase knowledge required (major refactor, complex integration)

Key principle: Higher complexity = more context the agent needs to load and understand

Read the full file on GitHub · 425 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.

  1. 1mo ago First seen · 425 lines · 14 tokens per session scan C c4f7eb6d2fff

Subscribe to this mod's changes

generate-spec is a command published in the GitHub repository jnarowski/agentcmd (18 stars, last pushed 10mo ago), licensed MIT. It adds 14 tokens to every session and 3,278 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.