speckit.constitution

speckit.constitution is a command for Claude Code from HelixDevelopment/code. It costs 13 tokens per session (2,158 once invoked), scanned A, a copy of constitution, MIT.

A project-constitution command that creates or updates the rules and principles governing a project. It keeps unrelated implementation requests separate and suggests later commands for them.

In plain words
What is it for?
Use it to define project principles and handle deferred requests through the appropriate follow-up workflow.
Why use it?
It prevents governance work from accidentally changing application code or other project files.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

Good fit Use it to define project principles and handle deferred requests through the appropriate follow-up workflow.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/helixdevelopment/code/speckit.constitution
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/HelixDevelopment/code

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.constitution

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

Your own site · 80×15
<a href="https://agentmods.dev/commands/helixdevelopment/code/speckit.constitution"><img src="https://agentmods.dev/badge/commands/helixdevelopment/code/speckit.constitution.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 13 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 2,158 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 95% copy Near-identical to another mod 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 $0.00013 $0.02158
Opus 5 $0.00006 $0.01079
Sonnet 5 $0.00003 $0.00432
Haiku 4.5 $0.00001 $0.00216

Measured yesterday against content hash 9a7e9296f087, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-15, from the pricing page.

Security

Grade A, and why

speckit.constitution 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.

Origin

This is a copy

95% identical to constitution — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.kilo/commands/speckit.constitution.md · 176 lines

How it starts

The opening of the file, as written. The whole thing — 176 lines — stays where its author put it; the contents beside it link to each section on GitHub.

User Input

$ARGUMENTS

You MUST consider the user input before proceeding (if not empty).

Scope Guard

This command's own work is limited to updating the project constitution itself. Dependent templates and commands read the constitution at runtime and are not modified here.

  • Classify every part of the user input as either constitution content or a separate, non-governance intent.
  • If the input includes feature implementation, code generation, refactoring, building, or deployment requests, you MUST NOT execute them. Extract them as deferred intents instead.
  • You MUST NOT create, modify, or delete application source files, feature routes, components, tests, deployment files, or other artifacts unrelated to the constitution workflow.
  • If it is unclear whether an instruction is constitution content, ask for clarification before making changes.
  • After completing the constitution update, include a Next Actions section for each deferred intent. List the original intent and suggest the appropriate follow-up Spec Kit command, such as /speckit.specify, without invoking it.
  • If there are no non-governance intents, omit the Next Actions section.

Pre-Execution Checks

Check for extension hooks (before constitution update):

  • Check if .specify/extensions.yml exists in the project root.
  • If it exists, read it and look for entries under the hooks.before_constitution key
  • If the YAML cannot be parsed or is invalid, do not skip silently: tell the user that .specify/extensions.yml could not be read (include the parser error) and that no hooks were checked, including any mandatory (optional: false) hooks registered there, then continue normally
  • Filter out hooks where enabled is explicitly false. Treat hooks without an enabled field as enabled by default.
  • For each remaining hook, do not attempt to interpret or evaluate hook condition expressions:
    • If the hook has no condition field, or it is null/empty, treat the hook as executable
    • If the hook defines a non-empty condition, skip the hook and leave condition evaluation to the HookExecutor implementation
  • For each executable hook, output the following based on its optional flag:
    • Optional hook (optional: true):
      ## Extension Hooks
      
      **Optional Pre-Hook**: {extension}
      Command: `/{command}`
      Description: {description}
      
      Prompt: {prompt}
      To execute: `/{command}`
      
    • Mandatory hook (optional: false):
      ## Extension Hooks
      
      **Automatic Pre-Hook**: {extension}
      Executing: `/{command}`
      EXECUTE_COMMAND: {command}
      
      Wait for the result of the hook command before proceeding to the Outline.
      
      After emitting the block above you MUST actually invoke the hook and wait for it to finish before continuing. Run it the same way you would run the command yourself in this agent/session (the invocation may differ from the literal {command} id shown above, e.g. a skills-mode agent runs it as /skill:speckit-... or $speckit-...). Emitting the block alone does not run the hook.
  • If no hooks are registered or .specify/extensions.yml does not exist, skip silently

Read the full file on GitHub · 176 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. yesterday Changed · +2 lines 9a7e9296f087
  2. 4d ago First seen · 174 lines · 13 tokens per session scan A d76a1ecf2ada

Subscribe to this mod's changes

speckit.constitution is a command published in the GitHub repository HelixDevelopment/code (2 stars, last pushed 2d ago), licensed MIT. It adds 13 tokens to every session and 2,158 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to constitution, differing in 8 lines, and is treated as a copy.