[Extension]: Add golden-demo

[jasstt]

Extension ID

golden-demo

Extension Name

Golden Demo

Version

0.1.0

Description

Adds behavioral drift detection to the SDD workflow. After planning,
extracts acceptance criteria from spec.md/plan.md into
.specify/golden-demo/test-vectors.md. After implementation, runs a
dry-run drift report against those vectors — comparing intended
behavior (spec) with implemented behavior (code).

Author

jasstt

Repository URL

https://github.com/jasstt/spec-kit-golden-demo

Download URL

https://github.com/jasstt/spec-kit-golden-demo/archive/refs/tags/v0.1.0.zip

License

MIT

Homepage (optional)

No response

Documentation URL (optional)

No response

Changelog URL (optional)

No response

Required Spec Kit Version

=0.1.0

Required Tools (optional)

Number of Commands

2

Number of Hooks (optional)

No response

Tags

testing, drift-detection, behavioral-oracle, tdd, quality

Key Features

• Automatically scans spec.md and plan.md for acceptance criteria during the plan phase.
• Extracts discovered acceptance criteria into a dedicated .specify/golden-demo/test-vectors.md artifact.
• Connects to the after_plan hook to generate these test vectors seamlessly.
• Connects to the after_implement hook to perform a dry-run behavioral drift check against the generated vectors.
• Provides a zero-TDD path foundation by synthesizing behavioral vectors for projects not using traditional test files.

Testing Checklist

• Extension installs successfully via download URL
• All commands execute without errors
• Documentation is complete and accurate
• No security vulnerabilities identified
• Tested on at least one real project

Submission Requirements

• Valid extension.yml manifest included
• README.md with installation and usage instructions
• LICENSE file included
• GitHub release created with version tag
• All command files exist and are properly formatted
• Extension ID follows naming conventions (lowercase-with-hyphens)

Testing Details

Tested on

• Windows 11 (PowerShell) with Spec Kit v0.11.4

Test project: Local dummy project initialized via specify init golden-demo-test --integration claude

Test scenarios:

1. Initialized a fresh Spec Kit project and installed the extension using specify extension add --dev.
2. Verified the extension successfully registered via specify extension list.
3. Validated that the after_plan hook triggers correctly and parses acceptance criteria from specs into .specify/golden-demo/test-vectors.md.
4. Validated that the after_implement hook reads the output artifact and correctly executes the dry-run output to the console.

Example Usage

# Install extension
specify extension add golden-demo --from https://github.com/jasstt/spec-kit-golden-demo/archive/refs/tags/v0.1.0.zip

# The commands trigger automatically via hooks during normal SDD workflows:
# 1. Runs after planning:
/speckit.plan
# Prompts: "Golden Demo: extract test vectors from spec and plan?"

# 2. Runs after implementation:
/speckit.implement
# Prompts: "Golden Demo: run behavioral drift check?"

Proposed Catalog Entry

**Proposed Catalog Entry**

{
  "golden-demo": {
    "name": "Golden Demo",
    "id": "golden-demo",
    "description": "Extracts acceptance criteria from specs, builds test vectors, and produces a behavioral drift report — complementary to Architecture Guard and CDD.",
    "author": "jasstt",
    "version": "0.1.0",
    "download_url": "https://github.com/jasstt/spec-kit-golden-demo/archive/refs/tags/v0.1.0.zip",
    "repository": "https://github.com/jasstt/spec-kit-golden-demo",
    "homepage": "https://github.com/jasstt/spec-kit-golden-demo",
    "license": "MIT",
    "requires": {
      "speckit_version": ">=0.1.0"
    },
    "provides": {
      "commands": 2
    },
    "tags": ["testing", "drift-detection", "behavioral-oracle", "tdd", "quality"],
    "verified": false,
    "downloads": 0,
    "stars": 0,
    "created_at": "2026-06-27T00:00:00Z",
    "updated_at": "2026-06-27T00:00:00Z"
  }
}

Additional Context

No response

[github-actions]

cc @github/spec-kit-maintainers — new catalog submission for review.

[github-actions]

Validation Results for golden-demo

Thank you for your extension submission! I ran automated validation and found one issue that needs to be resolved before this extension can be added to the catalog.

---

✅ Checks Passed

Check	Result
Extension ID format (^[a-z][a-z0-9-]*$)	✅ golden-demo is valid
Version format (semver X.Y.Z)	✅ 0.1.0 is valid
Repository is public and accessible	✅ https://github.com/jasstt/spec-kit-golden-demo
extension.yml manifest present	✅ Found
README.md present	✅ Found
LICENSE file present	✅ Found
Download URL pattern	✅ Matches archive/refs/tags/v0.1.0.zip
Submission checklists	✅ All boxes checked

---

❌ Check Failed

GitHub Release for v0.1.0 not found

The repository has a git tag v0.1.0, but no formal GitHub Release was created for it. The submission requirements ask for a GitHub Release (not just a git tag).

How to fix: Go to your repository → Releases → Draft a new release → select tag v0.1.0 → fill in the release title and notes → publish the release.

After publishing the release, please update this issue (or re-submit) so validation can be re-run.

---

Posted on behalf of @mnriem by GitHub Copilot (model: claude-sonnet-4.6, autonomous).

Generated by 🧩 Add Community Extension from Issue Submission for issue #3127 · 115.2 AIC · ⌖ 13 AIC · ⊞ 32.9K · ◷

[mnriem]

@jasstt Please address the Check failed section above

[jasstt]

Release v0.1.1 is now published, and the manifest version is consistent.
Ready for re-validation.