Hax coding agent
Hacker ApprovedRanked 8 of 41 coding agents by recommenders
A tiny, MIT-licensed terminal coding agent in C with minimal tools, favored over bloated harnesses. Critics note weak context handling and slow-provider behavior.
A tiny, MIT-licensed terminal coding agent in C with minimal tools, favored over bloated harnesses. Critics note weak context handling and slow-provider behavior.
32 people gave an opinion
- recommend it
- 28
- criticize it
- 4
- approval share
- 88%
Recommended in 4 of 13 months
- November 2025: not recommended
- December 2025: recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: not recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Why it carries the badge
- 28 people recommend itNeeds 10 or more, met.
- 7 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 4 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Written in C, few dependencies
“Hax is written in C, the dynamically linked binary is even smaller (0.6 MB), MIT-licensed.”
Comment from 19 Aug 2026 in “fx :Tiny, open, native coding agent.” “it's actually fully open source, and even more lean (few MBs of runtime memory usage)”
Comment from 10 Aug 2026 in “Show HN: Ante, a coding agent in a single binary that runs offline” “Feels so much better, so lightweight. Compiles instantly. Almost no dependencies.”
Comment from 31 Oct 2026 in “Prospero: A new coding harness for a more civilized age” - Comment from 5 Aug 2026 in “Pi's Minimalism Is Its Advantage”
- Comment from 11 Sep 2026 in “Nine coding harnesses vs. your laptop”
- Comment from 31 Oct 2026 in “Prospero: A new coding harness for a more civilized age”
Minimal tools and simple config
“a bare bones harness with minimal tools on my system and have the models rely on bash for the most part the last few months”
Comment from 12 Oct 2026 in “Codex CLI installs a persistent, self-updating background daemon by default” “Written in C, tiny footprint, minimalist approach to system prompt and tools”
Comment from 5 Aug 2026 in “Pi's Minimalism Is Its Advantage” “No MCP, agent just gets a shell tool, simple config, whole thing's in C.”
Comment from 1 Oct 2026 in “Pi 1.0” - Comment from 13 Oct 2026 in “Codex CLI installs a persistent, self-updating background daemon by default”
Clean, fast, minimal interface
“Performance is great, and the minimal UI is a breath of fresh air.”
Comment from 13 Aug 2026 in “Hax – a minimalist, terminal-native coding agent written in C” “such a clean approach to lightweight local tooling”
Comment from 12 Aug 2026 in “Hax – a minimalist, terminal-native coding agent written in C” “Thank you for making such a lean and clean option.”
Comment from 12 Aug 2026 in “Hax – a minimalist, terminal-native coding agent written in C” Lighter alternative to Pi
“If you feel that Pi has been drifting away from its original vision, try hax”
Comment from 30 Sep 2026 in “You said no MCP” “Yeah I think Pi just abandoned the prize and hax is the heir apparent.”
Comment from 2 Oct 2026 in “Pi 1.0” “it is much smaller than Pi in terms of what it needs to work”
Comment from 1 Oct 2026 in “Pi 1.0”
What people warn about
Each mark is one comment
Poor context window handling
“it would consistently blow out the small context window of my local qwen”
Comment from 13 Oct 2026 in “Codex CLI installs a persistent, self-updating background daemon by default” “the context handling is the main dealbreaker for me”
Comment from 2 Oct 2026 in “Pi 1.0” Unclear value and landing page
“That landing page is hard to look at, let alone read.”
Comment from 13 Oct 2026 in “Codex CLI installs a persistent, self-updating background daemon by default” “I don't understand the value proposition.”
Comment from 31 Oct 2026 in “Prospero: A new coding harness for a more civilized age”
Other coding agents people recommend
The four most recommended other coding agents, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| GitHub Copilot | 571 | 993 | 37% | 12 | 1 yr46 owners | — |
| oh-my-pi | 104 | 28 | 79% | 9 | 2 mo5 owners | Approved |
| Grok Build CLI | 66 | 114 | 37% | 6 | — | — |
| DeepSeek Harness | 63 | 28 | 69% | 4 | 1 mo5 owners | Approved |
| Hax coding agentThis page | 28 | 4 | 88% | 4 | — | Approved |
What people said
37 of the 44 comments that mention it, newest first. Each links to the original comment.
“Feels so much better, so lightweight. Compiles instantly. Almost no dependencies.”
“hax is much smaller in footprint”
“I don't understand the value proposition.”
“Less than 2 MB fully static Linux binary, few MBs of RAM use in runtime.”
“it would consistently blow out the small context window of my local qwen”
“it has been the only harness who respects the XDG specification and does not ask me to install by curling into sh”
“i had to scroll all the way down”
“That landing page is hard to look at, let alone read.”
“Simple (harness) beats complicated one many times.”
“The sessions are merely plain text files indexed by a dirpath slug.”
“basically it will be a zero-config experience”
“it deals with slow provider responses very poorly”
“a bare bones harness with minimal tools on my system and have the models rely on bash for the most part the last few months”
“Yeah I think Pi just abandoned the prize and hax is the heir apparent.”
“the context handling is the main dealbreaker for me”
“it is much smaller than Pi in terms of what it needs to work”
“No MCP, agent just gets a shell tool, simple config, whole thing's in C.”
“I've been frustrated by harnesses hijacking the terminal and breaking basic features such as scrolling and text selection.”
“I've been using hax ( https://usehax.dev ) and haven't missed skills at all to be honest.”
“If you feel that Pi has been drifting away from its original vision, try hax”
“I even use hax for some of my local needs where i dont want to have the giant pile of fertilizer”
“This looks like such a nice cli/tui talking/chat harness”
“installing it via brew and it not being react are points I - love - to see”
“0.7 MB dynamically linked native C binary, few MBs of RAM usage when running”
“I really like the philosophy document”
“that's an amazing project!”
“Hax is written in C, the dynamically linked binary is even smaller (0.6 MB), MIT-licensed.”
“Performance is great, and the minimal UI is a breath of fresh air.”
“Works better than in Claude Code.”
“Someone tried to figure out for themselves what an end-to-end process would look like for what they wanted to do.”
“Thank you for making such a lean and clean option.”
“oh cool! how do I contribute? :)”
“such a clean approach to lightweight local tooling”
“clean, fast performance with local models and llama.cpp”
“it's actually fully open source, and even more lean (few MBs of runtime memory usage)”
“Written in C, tiny footprint, minimalist approach to system prompt and tools”
“I've been using Hax to pretty good effect so far”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.