specify

A command that starts a feature using a written specification and a separate Git branch. A specification describes what the feature should do before implementation begins.

In plain words
What is it for?
Use it when beginning a new feature in a repository that follows a specification-first workflow.
Why use it?
It gives a feature a clear written scope and an isolated place for code changes. This makes the next development steps easier to follow and review.

Command for Claude Code

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/akiojin/unity-editor-mcp/specify
Clone the repo
git clone --depth 1 https://github.com/akiojin/unity-editor-mcp

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 164 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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00164
Opus 5 $0.00000 $0.00082
Sonnet 5 $0.00000 $0.00033
Haiku 4.5 $0.00000 $0.00016

Measured 2d ago against content hash 643e29458141, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

specify 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 2d 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.

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.

Origin

Copies of this mod

2 near-identical copies found in the catalogue:

  • specify — 100% identical, 0 lines differ
  • specify — 100% identical, 0 lines differ
.claude/commands/specify.md · 14 lines

What it actually says

Start a new feature by creating a specification and feature branch.

This is the first step in the Spec-Driven Development lifecycle.

Given the feature description provided as an argument, do this:

  1. Run the script scripts/create-new-feature.sh --json "$ARGUMENTS" from repo root and parse its JSON output for BRANCH_NAME and SPEC_FILE. All file paths must be absolute.
  2. Load templates/spec-template.md to understand required sections.
  3. Write the specification to SPEC_FILE using the template structure, replacing placeholders with concrete details derived from the feature description (arguments) while preserving section order and headings.
  4. Report completion with branch name, spec file path, and readiness for the next phase.

Note: The script creates and checks out the new branch and initializes the spec file before writing.

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. 2d ago First seen · 14 lines · 0 tokens per session scan A 643e29458141

Subscribe to this mod's changes

specify is a command published in the GitHub repository akiojin/unity-editor-mcp (11 stars, last pushed 12mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 164 tokens. 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.