Sentinel
open-source QA agent that reads your code before it clicks
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HN · launched Jul 16, 2026 · 16 upvotes (top 34%) · 0 views
Niche: automated software testing tools · 185 launches, 12 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Agent / copilot
- Developer
- AI-native
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 185 launches in automated software testing tools →
Could you build this?
Partial The basic agent loop and browser automation are vibe-codeable, but autonomously parsing an entire codebase to infer complex multi-step business logic and running reliable end-to-end tests without hallucination loops is exceptionally difficult.
What it would actually take: The system requires an AST code-indexing pipeline (Tree-sitter, vector embeddings), an agentic planning engine with state-tracking, and an automated Playwright/Puppeteer harness with vision and network interception. The hard part is reliable flow synthesis and deterministic environment management (seeding test databases, managing tenant isolation, and recovering from flakiness) across complex multi-step workflows. Specialized QA automation and agent reliability engineering are necessary.
Discussion
6 comments analyzed.
Concerns raised: Repository was private, inaccessible to users, GitHub link returns 404 error
Competitors
Other products that read as similar to this one : 2210 launches clear the similarity bar, closest 8 shown.
Attention rank: #719 of 2211 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 259 days after the earliest competitor.
- Argus, agentic QA for teams whose coding agents move faster than QA · hn · 2026-08-18 · 8 upvotes · similarity 0.63
- Stroq · hn · 2026-11-05 · 95 upvotes · similarity 0.61
- Zot · hn · 2026-05-29 · 107 upvotes · similarity 0.59
- Opencodex, a free open-source coding agent for VSCode · hn · 2026-08-10 · 6 upvotes · similarity 0.58
- agent-launcher · github · 2026-10-09 · 10 upvotes · similarity 0.57
- Design guidance and UI checks for coding agents · hn · 2026-11-06 · 5 upvotes · similarity 0.57
- Proval · hn · 2026-08-27 · 13 upvotes · similarity 0.57
- Loom, an open-source delivery harness for coding agents · hn · 2026-06-10 · 5 upvotes · similarity 0.57
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