Observed arrival · 2026-10-15
semarch — architecture diffs for pull requests
A GitHub app that maps TypeScript codebases and adds an interactive architecture diff to pull requests.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Reviewers of unfamiliar TypeScript pull requests
- Worth noticing
- The Immich demo shows 15 changed files; its overview and detail panel report different module and independent-change counts.
Field notes
The described workflow indexes both the pull request's base and head, then computes changes on a dependency graph rather than comparing lines alone. Its demo exposes a zoomable view and says the pull-request comment is updated in place on each push; the homepage also distinguishes production code from tests and describes links from dependency edges to file-and-line evidence.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
⊠LoginAccess appeared gated
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue