📋 Changes browser
Active and archived changes with tabs for proposal, tasks, design, and spec deltas - plus task-completion progress at a glance.
What it gives you that raw markdown can't
🕰️ Timeline
Changes laid out chronologically, derived straight from your git history. No metadata files to maintain.
🔀 Graph & Flow views
See how capabilities, changes, and specs relate to each other - and how work flowed from proposal to archive.
📖 Specs & Schemas
The current state of every capability, the schema that generated it, and EARS keyword highlighting in spec prose.
💬 Comments
Select any passage to attach a comment. Unresolved/resolved workflow, quote-click jumps back to the highlighted text - stored locally in SQLite.
🤖 LLM-ready export
Copy your review comments as structured markdown - quotes, authors, and status included - and paste them straight into your preferred LLM or coding agent.
✍️ Git-derived attribution
Who created and last edited every document, straight from git log. Works with any repo; degrades gracefully without one.
⚡ Fast navigation
Global search (⌘K), back/forward history, document zoom, minimap with a slide-out table of contents, Mermaid diagrams.
🧠 Local AI summaries
An on-device model summarizes the project and any document for reviewers - streamed into a side panel, linked back to the specs. Nothing leaves your machine.
🦙 Your choice of model
Five curated models downloaded on demand, any llama.cpp-compatible GGUF you import, or your local Ollama library.
🔒 Local-first
Point it at folders on your machine. No accounts, no cloud, no telemetry - your specs never leave your disk.
🎨 Make it yours
Dark and light themes, resizable sidebar and comments panel, reading-speed and highlight-color settings, document zoom.
How it works
- Download SpecLens and open it.
- Click Add repository and pick any folder containing an
openspec/directory. - Read, trace, and comment. That's it.
Download
Grab the build for your system from the latest release.
On the roadmap
Spec validation, Mac App Store, auto-updates, comment threads, and more - the full, always-current list lives in docs/ROADMAP.md.