[Extension]: Add deja-vu #5208

Extension ID

deja-vu

Extension Name

deja-vu session recall

Version

0.23.4

Description

Searches your past coding-agent sessions for a feature: what was tried, decided or failed.

Author

Vladislav Shulcz (@vshulcz)

Repository URL

https://github.com/vshulcz/deja-vu

Download URL

https://github.com/vshulcz/deja-vu/releases/download/v0.23.4/deja-spec-kit.zip

License

MIT

Homepage (optional)

https://vshulcz.github.io/deja-vu/

Documentation URL (optional)

https://github.com/vshulcz/deja-vu/blob/main/extensions/spec-kit/README.md

Changelog URL (optional)

https://github.com/vshulcz/deja-vu/blob/main/CHANGELOG.md

Required Spec Kit Version

=0.10.0

Required Tools (optional)

• deja (>=0.22.0) - required

Number of Commands

1

Number of Hooks (optional)

1

Tags

memory, recall, history, context, local-first

Key Features

• /speckit.deja-vu.recall reads the active spec.md and plan.md, picks a few queries and searches the agent session transcripts already on disk (Claude Code, Codex, Cursor, Copilot, Gemini and others) through the deja CLI
• Reports what past sessions tried and abandoned, what they settled, and which files they touched, each point cited with a session id
• Optional before_implement hook, so /speckit.implement offers the recall and runs nothing unless the user agrees
• Read-only and local: it runs deja recall, deja files and deja show, edits nothing, sends nothing anywhere

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 macOS with Spec Kit 1.2.0 and 0.10.0.
Test projects: fresh specify init with the claude, gemini and copilot integrations.

1. specify extension add deja-vu --from https://github.com/vshulcz/deja-vu/releases/download/v0.23.4/deja-spec-kit.zip installs, registers the command (Claude and Copilot as a skill, Gemini as .gemini/commands/speckit.deja-vu.recall.toml) and writes the before_implement hook as optional into .specify/extensions.yml.
2. Ran the deja calls the command makes, including a query starting with -, against an empty and a populated index.
3. The repository's CI checks extensions/spec-kit/extension.yml against Spec Kit's schema rules (id, version matching the release tag, command names, files, optional hook).

Example Usage

brew install deja-vu
specify extension add deja-vu --from https://github.com/vshulcz/deja-vu/releases/download/v0.23.4/deja-spec-kit.zip

/speckit.deja-vu.recall
/speckit.deja-vu.recall stripe webhook signature

Proposed Catalog Entry

{
  "deja-vu": {
    "name": "deja-vu session recall",
    "id": "deja-vu",
    "description": "Searches your past coding-agent sessions for a feature: what was tried, decided or failed.",
    "author": "Vladislav Shulcz (@vshulcz)",
    "version": "0.23.4",
    "download_url": "https://github.com/vshulcz/deja-vu/releases/download/v0.23.4/deja-spec-kit.zip",
    "sha256": "3e349ecb2854206488acb080f1a98cfb8635cf9ef9f529c54081bfe9a64c6717",
    "repository": "https://github.com/vshulcz/deja-vu",
    "homepage": "https://vshulcz.github.io/deja-vu/",
    "documentation": "https://github.com/vshulcz/deja-vu/blob/main/extensions/spec-kit/README.md",
    "changelog": "https://github.com/vshulcz/deja-vu/blob/main/CHANGELOG.md",
    "license": "MIT",
    "category": "process",
    "effect": "read-only",
    "requires": {
      "speckit_version": ">=0.10.0",
      "tools": [
        { "name": "deja", "version": ">=0.22.0", "required": true }
      ]
    },
    "provides": { "commands": 1, "hooks": 1 },
    "tags": ["memory", "recall", "history", "context", "local-first"],
    "verified": false,
    "downloads": 0,
    "stars": 0,
    "created_at": "2026-11-01T00:00:00Z",
    "updated_at": "2026-11-01T00:00:00Z"
  }
}

Additional Context

The extension lives in extensions/spec-kit of the vshulcz/deja-vu repository, and every deja release attaches deja-spec-kit.zip with the manifest version pinned to that release.