smol
Shares rank 6 of 11 coding agent harnesses by recommenders
A minimal open source coding agent that is small, light on CPU and RAM, and easy to read and adapt. Critics note it lacks subagents and a system prompt, and its size hurts caching.
A minimal open source coding agent that is small, light on CPU and RAM, and easy to read and adapt. Critics note it lacks subagents and a system prompt, and its size hurts caching.
10 people gave an opinion
- recommend it
- 9
- criticize it
- 1
- approval share
- 90%
Recommended in 5 of 13 months
- November 2025: recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 9 people recommend itNeeds 10 or more, not met.
- 9 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 5 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
Minimal, simple, compact codebase
“an open source agent that uses a minimal amount of CPU and RAM and has source that is easy to audit”
Comment from 11 Aug 2026 in “Show HN: Ante, a coding agent in a single binary that runs offline” “smol is very minimal only using stdlib”
Comment from 11 Aug 2026 in “Show HN: Ante, a coding agent in a single binary that runs offline” “Smol is simple and compact.”
Comment from 21 Aug 2026 in “Malicious Rust Crate Arrayref Runs a Build-Time Payload” - Comment from 4 Aug 2026 in “Agent skills that bring team coding standards to Claude Code and Codex”
Easy to read and adapt
“if you want to see what a simple harness implementation looks like you can just dive into the code”
Comment from 27 Aug 2026 in “Harness Engineering” “you can read each run step by step and see what the agents are doing”
Comment from 4 Aug 2026 in “Agent skills that bring team coding standards to Claude Code and Codex” “because smol is so smol you can adapt it easily”
Comment from 5 Aug 2026 in “Pi's Minimalism Is Its Advantage” - Comment from 5 Aug 2026 in “Pi's Minimalism Is Its Advantage”
Alternative to Docker isolation
“that's a great way to leverage hypervisor isolation to avoid those issues”
Comment from 11 May 2026 in “Ask HN: What Are You Working On? (May 2026)” “definitely enjoying smol. this is a very nice alternative to docker”
Comment from 3 Jul 2026 in “Podman v6.0.0” Fits easily in context window
“it fits into the context window with plenty of room to spare”
Comment from 5 Aug 2026 in “Pi's Minimalism Is Its Advantage” “look at minimal agents that protect the context window”
Comment from 8 Aug 2026 in “Databricks drove down AI coding spend 70%”
What people warn about
Each mark is one comment
Missing subagents and system prompt
“smol currently is very simple so it definitely does less things, like no subagent orchestration”
Comment from 1 Aug 2026 in “Cursor removed cost information from the usage page and CSV export” “in smol (minimalist agent harness) there currently is no system prompt at all”
Comment from 16 Aug 2026 in “Claude: System Prompts” Weak caching and token efficiency
“so in this specific case the count of uncached tokens for smol makes it look worse than it actually is”
Comment from 1 Aug 2026 in “Cursor removed cost information from the usage page and CSV export” “the token efficiency hurts cache use as caching only starts at 1024 tokens”
Comment from 1 Aug 2026 in “Cursor removed cost information from the usage page and CSV export”
Other coding agent harnesses people recommend
The four most recommended other coding agent harnesses, 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 |
|---|---|---|---|---|---|---|
| Pi coding agent | 892 | 198 | 82% | 12 | 3 mo51 owners | Approved |
| omp (oh-my-pi) | 80 | 21 | 79% | 6 | — | Approved |
| ForgeCode | 39 | 12 | 76% | 10 | — | Approved |
| Reasonix | 26 | 19 | 58% | 6 | — | — |
| smolThis page | 9 | 1 | 90% | 5 | — | — |
What people said
22 of the 24 comments that mention it, newest first. Each links to the original comment.
“Smol was the only one to answer a basic question about javascript correctly”
“desktop applications or those who prefer the simplicity”
“if you want to see what a simple harness implementation looks like you can just dive into the code”
“Smol is simple and compact.”
“in smol (minimalist agent harness) there currently is no system prompt at all”
“smol is very minimal only using stdlib”
“an open source agent that uses a minimal amount of CPU and RAM and has source that is easy to audit”
“look at minimal agents that protect the context window”
“why is it codegolfed to such an extent?”
“it makes a decent starting point”
“sh is pretty versatile and composes well”
“because smol is so smol you can adapt it easily”
“it fits into the context window with plenty of room to spare”
“I like the smol philosophy.”
“you can read each run step by step and see what the agents are doing”
“smol looks interesting i think it could have a potential niche although tokens are only going to get cheaper and cheaper here”
“smol currently is very simple so it definitely does less things, like no subagent orchestration”
“the token efficiency hurts cache use as caching only starts at 1024 tokens”
“so in this specific case the count of uncached tokens for smol makes it look worse than it actually is”
“definitely enjoying smol. this is a very nice alternative to docker”
“that's a great way to leverage hypervisor isolation to avoid those issues”
“Smol is multiplicatively faster than B-Trees and radically smaller.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.