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Show HN: Pu.sh – a full coding-agent harness in 400 lines of shell
🤖 Shell Scripting Meets AI: Pu.sh Revolutionizes Coding Agents
Pu.sh is a groundbreaking, 400-line shell script that harnesses the power of AI to create a full-fledged coding agent, all while adhering to a strict no-dependency policy and staying under 500 lines of code, making it remarkably portable. This innovative tool combines the capabilities of Anthropic and OpenAI with a range of system primitives, offering a REPL, auto-compaction, checkpoint/resume functionality, and more, directly from the command line. By condensing the complexity of a coding agent into a compact, interactive shell script, Pu.sh empowers developers to leverage AI-driven coding assistance without being tied to specific platforms or bloated dependencies.
2:05 am, May 1, 2026
guid
https://news.ycombinator.com/item?id=47968112
source_url
https://pu.dev/
author_name
nahimn
id: 2360
uid: 6iYQy
insdate: 2026-05-01 02:05:25
title: Show HN: Pu.sh – a full coding-agent harness in 400 lines of shell
additional: 🤖 Shell Scripting Meets AI: Pu.sh Revolutionizes Coding Agents
Pu.sh is a groundbreaking, 400-line shell script that harnesses the power of AI to create a full-fledged coding agent, all while adhering to a strict no-dependency policy and staying under 500 lines of code, making it remarkably portable. This innovative tool combines the capabilities of Anthropic and OpenAI with a range of system primitives, offering a REPL, auto-compaction, checkpoint/resume functionality, and more, directly from the command line. By condensing the complexity of a coding agent into a compact, interactive shell script, Pu.sh empowers developers to leverage AI-driven coding assistance without being tied to specific platforms or bloated dependencies.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=47968112
source_url: https://pu.dev/
updated:
image:
author_name: nahimn
author_link:
uid: 6iYQy
insdate: 2026-05-01 02:05:25
title: Show HN: Pu.sh – a full coding-agent harness in 400 lines of shell
additional: 🤖 Shell Scripting Meets AI: Pu.sh Revolutionizes Coding Agents
Pu.sh is a groundbreaking, 400-line shell script that harnesses the power of AI to create a full-fledged coding agent, all while adhering to a strict no-dependency policy and staying under 500 lines of code, making it remarkably portable. This innovative tool combines the capabilities of Anthropic and OpenAI with a range of system primitives, offering a REPL, auto-compaction, checkpoint/resume functionality, and more, directly from the command line. By condensing the complexity of a coding agent into a compact, interactive shell script, Pu.sh empowers developers to leverage AI-driven coding assistance without being tied to specific platforms or bloated dependencies.
category: Hacker News
md5:
guid: https://news.ycombinator.com/item?id=47968112
source_url: https://pu.dev/
updated:
image:
author_name: nahimn
author_link:
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- Apple has decided to compete for creativity app users
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- Apple introduces the new iPad Air, powered by M4
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- Apple randomly closes bug reports unless you "verify" the bug remains unfixed
- Apple rejected my dictation app for using the accessibility API
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- Apple sues OpenAI, accuses ex-employees of stealing trade secrets
- Apple targets dozens of OpenAI employees with legal letters
- Apple to increase spend with Broadcom to produce billions more U.S. chips
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- Armstrong Effect
- Around 200 Stanford students walk out as Google CEO takes stage
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- Ars Technica fires reporter after AI controversy involving fabricated quotes
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- Ask HN: Academic study on AI's impact on software development – want to join?
- Ask HN: Add flag for AI-generated articles
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- Ask HN: Apple terminated our dev account over a rogue employee
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- Ask HN: Due to spam on GitHub, what platforms can I move my projects?
- Ask HN: European Tech Alternatives?
- Ask HN: Have top AI research institutions just given up on the idea of safety?
- Ask HN: How are you all staying sane?
- Ask HN: How did you land your first projects as a solo engineer/consultant?
- Ask HN: How do you handle marketing as a solo technical founder?
- Ask HN: How is AI-assisted coding going for you professionally?
- Ask HN: How to Be Alone?
- Ask HN: How to be SOC2 Type 2 compliant as a solo-entreprenuer?
- Ask HN: Is "no source code was copied" still a sufficient copyright defense?
- Ask HN: Is GitHub preparing to go behind a login wall?
- Ask HN: Is anyone experimenting with different ways of using LLMs for coding?
- Ask HN: Is anyone working at least 4 hours daily on an Apple Vision Pro?
- Ask HN: Is it just me, or is software buggier across the board?
- Ask HN: My ISP is telling my neighbors their slow internet is because of me
- Ask HN: Please restrict new accounts from posting
- Ask HN: Remember Fidonet?
- Ask HN: Share your productive usage of OpenClaw
- Ask HN: So what happened to Facebook "localhost" tracking?
- Ask HN: What Are You Working On? (July 2026)
- Ask HN: What Are You Working On? (March 2026)
- Ask HN: What are you working on? (June 2026)
- Ask HN: What are you working on? (May 2026)
- Ask HN: Who is hiring? (June 2026)
- Ask HN: Who is hiring? (March 2026)
- Ask HN: Who wants to be hired? (June 2026)
- Ask HN: Why hasn't there been a real competitor to Ticketmaster yet?
- Ask HN: Why is the HN crowd so anti-AI?
- Ask HN: Will programmers write more efficient code during the memory shortage?
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- Aspartame is not that bad?
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- Astra: An open-source observatory control software
- Astro 7.0
- Astronauts describe persistent 'observer' sensation after 6 month missions
- Astronomers Find the Edge of the Milky Way
- Astronomers find the edge of the Milky Way
- Astrophysicists Puzzle over Webb’s New Universe
- Async Programming Is Just Inject Time
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- At Protocol: Building the Social Internet
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- At long last, InfoWars is ours
- Atlassian Enables Default Data Collection to Train AI
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- Atlassian to cut roughly 1,600 jobs in pivot to AI
- Atomic Display Switching: Solving
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- Bild AI (YC W25) Is Hiring a Founding Product Engineer
- Billion-Parameter Theories
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- Biology is a Burrito: A text- and visual-based journey through a living cell
- Biscuit
- Bitburner, programming-based incremental game
- Bitcoin and quantum computing
- Bitcoin miners are losing $19,000 on every BTC produced as difficulty drops 7.8%
- Bitmap fonts make computers feel like computers again
- Bitwarden scrubs 'Always free' and 'Inclusion' values from its site
- Bjarne Stroustrup: How do I deal with memory leaks? (2022)
- Blacksky AppView
- Blaise – A modern self-hosting zero-legacy Object Pascal compiler targeting QBE
- Blatant AI slop just won a 25k USD DeepMind Kaggle Grand Prize
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- Block the "Upgrade to Tahoe" Alerts
- Block the “Upgrade to Tahoe” Alerts
- Blocking Internet Archive Won't Stop AI, but Will Erase Web's Historical Record
- Blog ran on Ubuntu 16.04 for 10 years. I migrated it to FreeBSD
- Blogger defeats photographer's copyright claim
- Blogging can just be stating the obvious
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- Bloom (YC P26) Is Hiring
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- Boy I was wrong about the Fediverse
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- Breaking Free
- Breakthroughs for batteries could soon make them better
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- Bring Back Idiomatic Design
- Bring back crappy forums
- Bring your own Agent to MS Teams
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- Britain is ejecting hereditary nobles from Parliament after 700 years
- Britain today generating 90%+ of electricity from renewables
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- British Columbia, Time Zones, and Postgres
- Bubble Sorted Amen Break
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- Building from zero after addiction, prison, and a felony
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- Bun has an open PR adding shared-memory threads to JavaScriptCore
- Bun is being ported from Zig to Rust
- Bun's unreleased Rust port has 13,365 unsafe blocks
- Bun: cgroup-aware AvailableParallelism / HardwareConcurrency on Linux
- BunnyCDN has been silently losing our production files for 15 months
- Burnout is real for open source maintainers
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- Businesses with ugly AI menu redesigns
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- Byrne's Euclid
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- C++26 is done ISO C++ standards meeting, Trip Report
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- C64 Basic Dungeon Crawler: Goblin Attack (C64 Basic Part 8)
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- CATL's new LFP battery can charge from 10 to 98% in less than 7 minutes
- CBP Directive 3340-049B: Border Search of Electronic Devices
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- CC-Canary: Detect early signs of regressions in Claude Code
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- CEOs Who Think AI Replaces Their Employees Are Just Bad CEOs
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- CISA Admin Leaked AWS GovCloud Keys on GitHub
- CODA: Rewriting Transformer Blocks as GEMM-Epilogue Programs
- CPanel and WHM Authentication Bypass – CVE-2026-41940
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- CRDTs merge concurrent edits. Why not concurrent creation?
- CSP for Pentesters: Understanding the Fundamentals
- CSS as a Query Language
- CSS is DOOMed
- CSS-Native Parallax Effect
- CSSQuake
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- CUDA-oxide: Nvidia's official Rust to CUDA compiler
- CVE-2026-25089: FortiSandbox unauthenticated command injection added to CISA KEV
- CVE-2026-28952: Apple macOS 26.5 Kernel Vuln found by Claude
- CVE-2026-31431: Copy Fail vs. rootless containers
- CVE-2026-3888: Important Snap Flaw Enables Local Privilege Escalation to Root
- CVE-Bench: testing LLM agents on real-world vulnerability patches
- Cal.diy: open-source community edition of cal.com
- California bill would require patches or refunds when online games shut down
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- Cambodia unveils a statue of famous landmine-sniffing rat Magawa
- Can Claude Fly a Plane?
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- Can LLMs Perform Deep Technical Comprehension of Computer Architecture Papers
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- Can a wealthy family change the course of a deadly brain disease?
- Can the stockmarket swallow Anthropic, SpaceX and OpenAI?
- Can we code our way out of gentrification?
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- Can you instruct a robot to make a PBJ sandwich?
- Can you stop beans from making you gassy?
- Can't Stop the Signal. Poison It
- Canada is looking to build up to 10 new nuclear reactors over the next 15 years
- Canada plans 'nuclear renaissance' with up to 10 reactors built by 2040
- Canada to order military plane fleet from Sweden in shift from US suppliers
- Canada's bill C-22 mandates mass metadata surveillance
- Canada's bill C-22 mandates mass metadata surveillance of Canadians
- Canada’s Bill C-22 Is a Repackaged Version of Last Year’s Surveillance Nightmare
- Cancel ChatGPT AI boycott surges after OpenAI pentagon military deal
- Cannabinoids remove plaque-forming Alzheimer's proteins from brain cells
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- Cannibalism
- Canonical Under Attack
- Canvas (Instructure) LMS Down in Ongoing Ransomware Attack
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- Capability-Based Security for Redox: Namespace and CWD as Capabilities
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- Capstone – multi-platform, multi-architecture disassembly framework
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- Care homes and hotels in Japan shut as expansion strategy unravels
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- Case study: recovery of a corrupted 12 TB multi-device pool
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