docs: clarify project-defined constitution articles

[YNan-varamor]

Summary

Clarifies that Articles IV, V, and VI in the SDD constitution are project-defined governance slots rather than fixed Spec Kit rules.

Why

Issue #2466 notes that spec-driven.md describes Articles I, II, III, VII, VIII, and IX, but does not explain how Articles IV, V, and VI should be understood. The added section documents that these articles are intentionally customized by each project's constitution while preserving the nine-article structure.

Validation

• Ran git diff --check
• Confirmed /speckit.analyze is an existing command in the repository docs/templates

AI assistance disclosure

This PR was prepared with assistance from OpenAI Codex. The change was reviewed locally and kept to a focused documentation update.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds clarification to the spec-driven documentation describing how Articles IV–VI are intended to be project-defined via a constitution template, and how /speckit.analyze enforces those customized principles.

Changes:

• Documented that Articles IV–VI are placeholders filled by each project’s constitution rather than fixed by Spec Kit
• Clarified examples of what governance topics these articles may cover (security, integration testing, observability, versioning)
• Stated that /speckit.analyze evaluates the project’s concrete constitution so these articles participate in compliance checks

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[Copilot]

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 0 new

[Copilot]

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 1

[Copilot]

Copilot's findings

• Files reviewed: 1/1 changed files
• Comments generated: 1

[mnriem]

Thank you!