Why DeepSeek Harness Just Became The Fastest Growing Github Repo EVER

CChase AI
Computing/SoftwareInternet Technology

Transcript

00:00:00so deep seek just open source their own harness it's called deep seek harness think of clod code
00:00:05for clod this is deep seek harness for deep seek and it has become the fastest growing repo ever
00:00:10we're at 167 000 stars in under a week now the thing you keep hearing with this harness
00:00:16is that everything is a plugin and this can get kind of confusing because we already have plugins
00:00:21in other harnesses like clod code and codex oftentimes those look like skills or mcps or clis
00:00:26these different outside tools we can tack on to the harness itself how is deep seek harness any
00:00:32different well the deep seek harness allows us to actually edit and change the harness itself in ways
00:00:38you just can't do with these other harnesses and big picture what deep seek is really trying to sell
00:00:43you is the infinitely customizable harness that can be somewhat self-improving in certain respects it can
00:00:49write its own plugins for its own harness that could be custom to whatever it is you're trying to do and
00:00:55so the response to this has been an exploding ecosystem of deep seek harness plugins that you
00:01:00can attach to whatever your build looks like on top of that this is something we can make completely
00:01:04local we can use this with any sort of model we want so there's a lot to work with here but the big
00:01:09question becomes does this live up to the hype is this new harness actually worth 167 000 stars in a
00:01:16handful of days especially for someone who's already using clod code or codex well that's exactly what we're
00:01:21going to talk about today and i'm also going to break down how this thing actually works so you can make
00:01:25an informed decision about whether you should move to this harness now first let's talk about installing
00:01:30this thing if you just search for the deep seek harness on github you will find this page to install
00:01:35it you'll just run this command in the terminal and it's going to bring up a web ui that looks just like
00:01:40this now this setup should be pretty familiar as it follows pretty much all the conventions of all the
00:01:44other harnesses over there on the left hand side we have our workspaces which is just the folders
00:01:49underneath here you'll have your different chat windows right up front we have our prompt window
00:01:53again you can choose your workspace and then we have a series of modes we can choose from so we have
00:01:59standard mode ptc mode minimal mode and creator mode so standard mode exactly what it sounds like it's
00:02:05standard this is like what you do for inside a cloud code ptc mode is all about multi-step tasks so in
00:02:10standard mode if you wanted it to do a bunch of tool calls it would do those tool calls one by one
00:02:15in ptc mode instead it would create a script where it runs all the tools essentially in one
00:02:21go the idea is if you're doing like complex tasks this will reduce some of the context blow that you
00:02:26get when you're just calling the tools one by one we then have minimal mode that's for very simple tasks
00:02:31and then lastly we have creator mode and we'll touch on that later but creator mode is where you can
00:02:35create your own plugins for this harness we press this plus button we have a number of different slash
00:02:41commands again some of these should be familiar to you things like compact things like goal
00:02:46i then have permissions for read only workspace right in full access and then lastly we have our
00:02:51model in our effort now remember this is an open source tool you don't have to use deep seek for this
00:02:56in my case i'm not using the deep seek api i'm using open router so i have access to you know
00:03:01essentially every single model out there now in order to set that up i'm going to come down and go to
00:03:05settings i'm going to go to models and then you just add a provider and insert your api key over
00:03:12here in general just sort of your standard stuff one thing i'll mention is the enter behavior while
00:03:17busy this is similar to what we see in codex so if it is executing some sort of tool call you can have
00:03:21it by default bq or steer so if it's on queue it's going to wait till it's done doing what it's doing
00:03:26before it takes your next message versus steer that's where it's going to finish its current tool
00:03:30call and then bring in your additional message next we have plugins so over here on the plugin list
00:03:35this is essentially every single thing you can do inside of the deep seek harness specified as a
00:03:40plugin and then we have the plugin configuration which shows us things we can actually edit inside
00:03:46of the harness itself like when we look at something like the agent loop this is literally
00:03:50like a core part of the plumbing of the deep seek harness that you can begin to edit just in
00:03:55terms of parallel tool calls and you can go deeper with these sort of edits using creator mode
00:03:59this is the difference between deep seek harness and cloud code cloud code you can sort of approximate
00:04:04a lot of these changes that we make at the harness level inside of the deep seek harness
00:04:08with things like skills and hooks but you aren't changing the actual plumbing under the hood you can
00:04:13do that here but on the flip side with all this customizability comes some annoyances for example
00:04:18like the web search if you want to be able to use web search out of the box you need to provide
00:04:22the deep seek api key well if you don't have that and you're using some sort of other model well you
00:04:27now need to find a plugin that allows you to do web search with with essentially any model for example
00:04:33i installed this free search plugin which allows me to use things like bing or duck duck go for my
00:04:38web search so i found this plugin on github again there is a huge exploding library of different deep
00:04:44seek harness plugins and simply follow the instructions to install it now does that seem somewhat sketchy that
00:04:49i'm installing some random chinese plugin well first of all i actually had cloud code take a look at it to
00:04:54make sure it wasn't sketchy but two this whole idea of sketchy plugins is something you want to pay
00:04:58attention to and is a major sort of red flag with the whole deep seek harness concept because as of
00:05:04right now out of the box remember this is in developer preview every single plugin you add to deep seek
00:05:09harness gets full shell access and full access to your entire file system so like if you install a
00:05:15random plugin into deep seek harness again this is very reminiscent to like when opencloth first came onto the
00:05:20scene be wary make sure you know what you're doing because if there is a bad actor that has some sort
00:05:26of sketchy plugin that can take a look at your api keys because it will essentially have permission to
00:05:30do so you can be in a bad spot so just be careful there hopefully this is something that changes and
00:05:35again that is one of the differences between deep seek and cloud code now let's say i want to install
00:05:40a plugin a great resource right now is the awesome deep seek harness plugin page on github which has a huge
00:05:46curated list of a bunch of different ones let's say i'm looking for ui enhancements because again since
00:05:50we can edit the harness itself we can do things like change what the actual user interface looks
00:05:55like let's say i want to add an effort slider well then brings me to that github page and then i just
00:06:00follow the instructions for the install which in this case is just running this command inside of the
00:06:05terminal so i run the command i then restart the deep seek harness and i now have this effort level slider
00:06:12now one thing you're gonna see on a lot of people's sort of like pages and content related is deep seek
00:06:16harness and plugins is the idea that when i there's like a built-in hot reload system for the plugins
00:06:21where you don't have to restart the harness that is kind of sort of true it depends on the plugin itself
00:06:25for certain plugins like the one you saw here yes you do need to restart the harness and it takes like
00:06:30two seconds but that's as easy as installing plugins is now if i want to create my own plugin which i think
00:06:36is the big sell for this thing is i'm just going to go into creator mode and i'm just going to
00:06:40describe the type of plugin i want to create so let's keep it kind of simple here with the ui and say
00:06:46i want you to create a plugin that changes the ui color scheme to look like the matrix with the
00:06:58falling ascii characters in the background can't type
00:07:09so another thing i want to point out here as it begins creating its own plugin so right here at the
00:07:15bottom we get a little more information than you might necessarily get with other harnesses i can
00:07:18see things like the cache hit percentage i can see the input and output tokens i can see my tokens per
00:07:23second all this cool stuff also in terms of what i actually see on the screen here i think it goes a
00:07:29little bit more in depth than where we see uh what other models show us right context injection i can see
00:07:34the actual system prompt itself and what's really cool is this thing up here called the trajectory
00:07:39where i get like deep insight into everything that is happening like the user the context the assistant
00:07:45the tools if i click on these things i can get even more information right a summary a preview raw
00:07:52source and this is like way more insight and way more visibility than a harness like cloud code is going to
00:07:58give you so in the situations where you're having to do a lot of troubleshooting like where is stuff
00:08:02actually going wrong well this is where i can find it and if you see this thing called cordis all over
00:08:07the place well this harness at its core the kernel the engine of this thing is this program called
00:08:14cordis this is what it all runs on and so cordis is like just this chassis of the car and the plugins
00:08:20is the engine and all these other things we're putting on it now you also have the ability to download
00:08:24the entire session log which goes into a zip folder and that is going to show you all this inside
00:08:28of json and i can also break it down by turns and calls and all this stuff so that's the other big
00:08:33sell for this harness that i think it does better than anything else is the insights to what's actually
00:08:37going on under the hood and the second thing is this this idea of custom plugins that affect the
00:08:43harness because again take this to like it's extreme once this thing is actually pretty flushed out
00:08:49well imagine changing how the harness works at its most base level so that it is perfect for your
00:08:55particular problems again we try to approximate that in things like cloud code and codex with
00:09:00skills and hooks and really you see that with dynamic workflows but this lets you get extremely granular
00:09:06so here's a look at what it created obviously this is ugly as sin but the silly example shows you how
00:09:11easy it is to create custom plugins that affect the harness itself now one thing to note when you create
00:09:16custom plugins it doesn't save it it's not permanent you have to tell it that you want it to be saved so
00:09:22that is just a prompt to say hey i want to save this plugin or i want to save this plugin with a toggle
00:09:26something to that effect or else you're going to lose it at the end of this session so that's the
00:09:31deep seek harness in a nutshell again the two big cells here are the custom plugins the fact that we can
00:09:36edit the harness at an extremely base foundational level and i would say this trajectory right the ability
00:09:42to actually get really deep with what the ai system is actually doing under the hood when we're
00:09:48giving it prompts and things of that nature we just don't have that same level of control with any
00:09:53other harness plus the fact that it's open source and it can be fully local all that is great as well
00:09:57so with all that being said should you leave cloud code should you leave codex and jump ship to the
00:10:02deep seek harness probably not don't get me wrong i think the deep seek harness is awesome i'm glad they
00:10:08didn't try to just create a cloud code clone or create another harness that looks like everything else out
00:10:12there this everything is a plugin approach and the fact that it's extremely customizable is awesome and
00:10:19the dream of this you know self-improving harness that can create its own plugins and adjust itself to
00:10:25your task sounds awesome in theory but in reality i don't know if it's ever going to actually happen
00:10:31and maybe it will but not today and there's also the question of like is it worth it to do something
00:10:37like that is it really moving the needle so much to have this custom harness for your problem
00:10:41and is it also worth the time and energy to get to that place maybe maybe not maybe eventually will
00:10:48either way today i think it's tough to say it's really a step above cloud code in any sense
00:10:53but it's free it's open source it's fully local so why not use it why not tinker with it
00:10:58and give it a shot because we can use both of these things we aren't stuck with any one tool
00:11:02and in general we should definitely be tool agnostic so definitely try it out let me know what you think
00:11:08as always make sure to check out chase ai plus if you want to get your hands on my cloud code masterclass
00:11:13and besides that i'll see you around

Key Takeaway

The DeepSeek harness provides unmatched customizability and internal transparency compared to tools like Claude Code, though security risks remain a concern for its developer preview plugins.

Highlights

  • The DeepSeek harness reached 167,000 GitHub stars in under a week, making it the fastest-growing repository ever.

  • The core engine of the harness runs on a program called cordis, which functions as the underlying chassis while plugins operate as the engine.

  • Every plugin added to the developer preview of the DeepSeek harness receives full shell access and complete access to the file system.

  • The harness features four distinct modes including standard mode, multi-step task ptc mode, minimal mode, and creator mode for building custom plugins.

  • The trajectory feature provides deep visibility into cache hit percentage, input and output tokens, tokens per second, system prompts, and tool calls.

Timeline

DeepSeek Harness Architecture and Core Concepts

  • The open-source DeepSeek harness accumulated 167,000 stars in less than a week on GitHub.
  • Unlike other harnesses, the DeepSeek harness allows users to directly edit and modify the harness plumbing itself.
  • The tool operates locally and connects with any model provider through standard API keys.

The repository introduces a distinct approach where everything functions as a plugin that can alter the foundational behavior of the agent loop. Users can configure alternative model providers such as Open Router within the settings menu. The system handles enter behavior during busy states by offering queue or steer configurations.

Modes, Settings, and Plugin Management

  • The interface provides standard, ptc, minimal, and creator modes to handle various task complexities.
  • Multi-step task ptc mode executes multiple tool calls inside a single script to minimize context bloat.
  • Unverified external plugins present significant security risks by operating with full shell and file system access.

Running the installation command in the terminal opens a web ui containing workspaces, chat windows, and slash commands. While community plugins such as free search options expand capabilities, developer preview permissions grant these third-party scripts extensive access to local files and api keys.

Custom Plugin Creation and System Trajectory Insights

  • Creator mode allows users to build and modify plugins by providing natural language descriptions.
  • The trajectory panel reveals cache hit percentages, token speeds, context injections, and raw source data.
  • Custom plugins require explicit prompt commands to save permanently before ending a session.

Users can install ui enhancements like effort sliders via terminal commands sourced from community repositories. The underlying engine, cordis, drives the core plumbing while the trajectory tool offers deep debugging visibility superior to traditional harnesses. Unsaved custom modifications disappear upon closing the session unless explicitly commanded to persist.

Comparative Evaluation and Practical Recommendations

  • Migrating entirely from established tools like Claude Code or Codex is currently unnecessary.
  • The self-improving plugin ecosystem remains largely theoretical for practical everyday production workflows.
  • The tool remains free, open source, and fully local, making it a viable option for independent experimentation.

While the deep customizability and granular trajectory insights offer strong advantages, the time and effort required to tailor the harness may not immediately surpass existing solutions. Developers benefit from remaining tool agnostic and tinkering with the local open-source repository without abandoning their primary workflows.

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