spec

A command for planning software before coding by writing a structured specification, a document describing the goal, users, features, tests, and limits.

In plain words
What is it for?
Use it to clarify a project, define acceptance criteria, choose a technical approach, and record testing and project boundaries.
Why use it?
It reduces misunderstandings by agreeing on what will be built and how it should work before implementation starts.

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/chankov/agent-fleet/spec
Clone the repo
git clone --depth 1 https://github.com/chankov/agent-fleet

Made for: Claude Code.

Per session 12 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 167 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 $0.00012 $0.00167
Opus 5 $0.00006 $0.00084
Sonnet 5 $0.00002 $0.00033
Haiku 4.5 $0.00001 $0.00017

Measured 2d ago against content hash 0456716771bc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

spec 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.

.versions/0.0.1/.claude/commands/spec.md · 16 lines

What it actually says

Invoke the agent-fleet:spec-driven-development skill.

Begin by understanding what the user wants to build. Ask clarifying questions about:

  1. The objective and target users
  2. Core features and acceptance criteria
  3. Tech stack preferences and constraints
  4. Known boundaries (what to always do, ask first about, and never do)

Then generate a structured spec covering all six core areas: objective, commands, project structure, code style, testing strategy, and boundaries.

Save the spec to the location the spec-driven-development skill defines (default docs/prds/{area}/PRD{n}-{topic}.md; overridable per project via .ai/agent-fleet-overrides.md). Confirm with the user before proceeding.

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 · 16 lines · 12 tokens per session scan A 0456716771bc

Subscribe to this mod's changes

spec is a command published in the GitHub repository chankov/agent-fleet (10 stars, last pushed 6d ago), licensed MIT. It adds 12 tokens to every session and 167 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 2026-08-31.