speckit.companion.specify

speckit.companion.specify is a command for Claude Code from alfredoperez/speckit-companion. It costs 11 tokens per session (8,391 once invoked), scanned A, original, MIT.

A command that creates a feature specification with prioritized user stories for a spec-driven development workflow.

In plain words
What is it for?
Use it to define what a feature should do and which user stories should be addressed first.
Why use it?
It turns an initial feature request into a clear description of user needs and their order of importance before planning and coding.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions subagents; mentions Claude Code.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is python3 .specify/extensions/companion/scripts/write-context.py --feature-dir <feature_directory> --step <step> --status <status> --kind start --by extension.

Good fit Use it to define what a feature should do and which user stories should be addressed first.

Compare 6 commands from other repositories ↓
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/alfredoperez/speckit-companion
agentmods
npx agentmods add commands/alfredoperez/speckit-companion/speckit.companion.specify

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 speckit.companion.specify

README.md
[![agentmods](https://agentmods.dev/badge/commands/alfredoperez/speckit-companion/speckit.companion.specify/github.svg)](https://agentmods.dev/commands/alfredoperez/speckit-companion/speckit.companion.specify)
Your own site
<a href="https://agentmods.dev/commands/alfredoperez/speckit-companion/speckit.companion.specify"><img src="https://agentmods.dev/badge/commands/alfredoperez/speckit-companion/speckit.companion.specify/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 speckit.companion.specify

Your own site · 80×15
<a href="https://agentmods.dev/commands/alfredoperez/speckit-companion/speckit.companion.specify"><img src="https://agentmods.dev/badge/commands/alfredoperez/speckit-companion/speckit.companion.specify.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 8,391 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00011 $0.08391
Opus 5.5 $0.00004 $0.03356
Sonnet 5.5 $0.00002 $0.01678
Haiku 4.5 $0.00001 $0.00839

Measured 21d ago against content hash fcad2694f103, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

speckit.companion.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 21d 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.

apps/speckit-extension/commands/speckit.companion.specify.md · 372 lines

How it starts

The opening of the file, as written. The whole thing — 372 lines — stays where its author put it; the contents beside it link to each section on GitHub.

User Input

$ARGUMENTS

Record this step's start: before anything else runs

A step's recorded window has to contain the work it claims. Stamping the start partway down the body leaves the extension hooks, and any node above the stamp, outside the window the step later reports. So this is the first instruction in the command, ahead of the hooks.

Let <step> be this command's phase and <status> its in-progress status: specify/specifying, plan/planning, tasks/tasking, implement/implementing.

Which feature directory this step stamps against decides when it stamps.

  • A step that mints its own feature directory, meaning any fresh-spec entry point such as specify or auto, has nothing to stamp against yet. .specify/feature.json is this step's output: it still points at the previous spec, so stamping now would write this run's status onto finished work. Resolve the directory first, then stamp the instant it exists, before any other work in the step.
  • Every other step reads the feature directory it was given, from the invocation or from .specify/feature.json, which by then points at this spec. Stamp immediately, before the extension hooks and before any node.

In both cases the call is the same:

python3 .specify/extensions/companion/scripts/write-context.py --feature-dir <feature_directory> --step <step> --status <status> --kind start --by extension

Add --at "<dispatch time>" when the dispatcher printed one; otherwise the script stamps now. Two things keep this honest:

  • Run it, never hand-write it. The script stamps the real clock and writes atomically. A hand-authored entry in .spec-context.json is what corrupts the file.
  • A second start is refused, not reconciled. History is append-only, so if the extension already seeded this step's start, this call appends nothing and the earlier timestamp stands. Running it is always safe; skipping it loses the window.

Read the full file on GitHub · 372 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. 21d ago Changed · +8 lines fcad2694f103
  2. 1mo ago Changed 095f199d76e3
  3. 1mo ago Changed · -9 lines 224a9b03817a
  4. 1mo ago Changed c14b85d037b5
  5. 1mo ago Changed 229f2d38d09a
  6. 1mo ago Changed · -25 lines · +1 tokens per session ec62159795a3
  7. 1mo ago Changed · +2 lines e52dc637030f
  8. 1mo ago Changed · +40 lines 272ca201183c
  9. 1mo ago Changed · +26 lines e0c2d08efb2c
  10. 1mo ago First seen · 330 lines · 10 tokens per session scan A 9468c9267d80

Subscribe to this mod's changes

speckit.companion.specify is a command published in the GitHub repository alfredoperez/speckit-companion (100 stars, last pushed 11d ago), licensed MIT. It adds 11 tokens to every session and 8,391 once invoked, about $0.0000 per session on Opus 5.5. 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 2026-09-03.