Ctxfw
AST context firewall that cuts agent prompt tokens by 67%
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HN · launched Sep 29, 2026 · 5 upvotes (top 87%) · 0 views
Niche: llm optimization tools · 127 launches, 9 in the last 7 days ▲ +50% · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- AI-native
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 127 launches in llm optimization tools →
Could you build this?
Partial Building an AST-based code pruner or context filter involves complex language-specific AST parsing, symbol resolution, and context-dependent dependency extraction across diverse programming languages.
What it would actually take: Requires integrating tree-sitter or language-specific compiler parsers for multiple programming languages. The system must construct accurate symbol dependency graphs, call graphs, and scoping trees to prune redundant definitions without breaking syntax or semantic context. Specialized compiler engineering knowledge and rigorous testing on diverse real-world repos are needed.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one : 1349 launches clear the similarity bar, closest 8 shown.
Attention rank: #1115 of 1350 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 330 days after the earliest competitor.
- Tired of duct-taping access control into agent prompts. Here's the fix · hn · 2026-06-03 · 22 upvotes · similarity 0.55
- agentsentinel · ph · 2026-11-03 · 1 upvotes · similarity 0.52
- offense · github · 2026-10-27 · 43 upvotes · similarity 0.51
- pwner · github · 2026-11-02 · 80 upvotes · similarity 0.50
- AgentReady · hn · 2026-02-23 · 8 upvotes · similarity 0.50
- alter-zero · github · 2026-09-13 · 15 upvotes · similarity 0.50
- Fengard · github · 2026-10-09 · 34 upvotes · similarity 0.50
- agentdock-mcp-harness · github · 2026-09-21 · 15 upvotes · similarity 0.49
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