Практика Shadowing: Rethinking Claude Code Best Practices — Lydia Hallie, Anthropic - Изучайте разговорный английский по видео

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I had some technical difficulties during my talk this morning.

So I ran back home and I'm just going to record it from my computer instead.

So hi everyone.

I'm Lydia.

I work on the clock code team at Anthropic and the models have gotten really good lately.

So we have Opus 5 .5, which is my favorite daily driver.

And earlier this week, we also launched Fable 5 .2.

And these models are extremely good at long running tasks and understanding your code base.

And especially Fable was also really good at verifying its own output.

But as these models get better, the way that we work with them in Cloud Code also changes.

So earlier this year, I don't know if you remember, but sessions kind of used to look like this.

So we'd use a model like Opus 4 .5, which honestly for its time was really good.

I really enjoyed working with Opus 4 .5.

But compared to today, it would just stop a lot earlier.

So it would just run for shorter amounts of time.

And we'd also keep correcting it.

We'd keep reminding it to do things, add things like importance, exclamation mark, all these things to our CloudMD file.

And also features like auto mode didn't exist yet.

So we were either approving everything manually or taking the riskier approach with dangerously skip remission.

So we were still very much in the loop as humans.

But as these models got better at taking on bigger tasks, our sessions also changed.

So nowadays, at least at Anthropic, our sessions look more like this.

So we're running dozens of sessions at the same time, running for hours, verifying their own results along the way,

and we even have sessions orchestrate other sessions.

So whereas we used to be in the loop for almost every step

and running one or just a couple sessions at a time, we've now essentially become managers for dozens of sessions.

We also get a lot more done, though.

Now, you may have seen our blog post in October about

how Enthropic went from about 2 ,500 changes a day in May to more than 30 ,000 a day in September.

But this also means that we as developers just have to rethink on what we're focused on instead.

So if you think about our best practices from earlier this year, it was mainly about steering sessions,

approving commands, saying no to certain things or restricting what

Cloud could do, checking the output and also starting the sessions.

So everywhere that we now step out of that loop, something else has to take over.

And this is either the model, the harness, or the environment that it's running in.

So if we are not in a loop to approve every command and we're running so many sessions at the same time,

how can we make sure that the code it's writing is still high quality?

And most importantly, if these sessions are running for hours without our supervision, how can we make sure that they're running safely?

So let's go through that by taking this old session

and seeing what we have to change to get to that end result that I showed earlier.

Well, first of all, let's use the actual defaults we start sessions in nowadays.

So that's not really something you should think about.

So let's update the model here from Opus 4 .5 to Opus 5 .5 and change the manual permission to auto mode.

And Opus 5 .5 is a lot better at understanding your intent and understanding your code base.

So we really don't have to steer it as much anymore mid -session.

And you also no longer have to approve every command

because we started making auto mode the default permission mode back in August.

Now being better at understanding your intent and your code base also means

that we have to rethink the instructions we have in our code base.

So if you followed our best practices from earlier this year you may still have things like important

or never do this exclamation mark all these things in your cloud MD file

but with today's models you really don't need that

and it can actually make the model go off track

so you end up with more tool calls and overall a worse results

so nowadays your cloud md file should only include the things

that cloud cannot see from your code

so for example maybe you have a service that's still using some legacy source somewhere

but it's not directly referenced in the code that's still good to keep in there

but everything else like what stack you're on

or where to look you really don't need that anymore

and we actually have a command for this called dr prompt audit

which makes it really easy to optimize your environment for a specific model.

So if you're on Opus 5 .5 here and you run this command,

it will automatically check your CloudMD and your skills to see what the new model no longer needs.

Now auto mode is a permission mode

that runs a separate classifier on pretty much everything that isn't just reading or editing files in your project.

So it automatically allows commands that it knows are safe, like running tests or installing dependencies, but still blocks commands where it's unsure whether they're safe

and normally that's pretty good normally that's kind of you know what we want

but for example here

if we ask it to ship something to staging

we would have just you know approved the push to our deploy repo

but by default auto mode only trusts this folder and this repo

so it would block that command

so we're back in the loop now the defaults should be good in most cases

but if you still notice that you have to approve a lot of commands, even in auto mode.

The first thing to look at is settings here because you can configure auto mode in your own settings, just in plain English.

And this is what gets sent to the classifier, which then decides whether to reject or allow certain commands.

So here we can just write which repos, buckets, domains we trust and what it should always allow or never do.

Okay, so honestly, this was pretty easy by just using today's defaults, we've already gotten rid of most of our in the loop stuff

because the model took over the steering

and auto mode took over all the approving so getting out of the loop is easy.

But the harder question now is how do we make sure it's okay that we're not there anymore?

So first is keeping it safe, and then also verification.

So let's start with keeping it safe, because everything so far, so upgrading the model and using auto mode, it's just working with a model.

And in most cases, it does what you tell it to do, but that's not a guarantee.

So in a study we published back in August, we tested auto mode versus real people in the loop,

and only about 14 % of people caught a clearly dangerous command.

AutoMode blocked 89 % of them, so it is a lot better at it than we were.

But about 1 in 10 of those commands still went through.

So if you do want the guarantee, you can only enforce that in the harness.

And this is where some of our older best practices still matters, and that's permission.

So, for example, if you have a deny rule for a specific tool call in your project,

clot code looks at this rule before the automo classifier even looks at it in fact

if a tool call matches a deny rule the classifier never even sees it

so having deny rules is still the best way to make sure clot actually never does something

but then how do you know what needs to be a

rule in your project versus what the model can just know

because they've gotten so good at it i think it kind of just comes down to

if clot gets this wrong once can i take it back so if it writes the wrong code, you can still revert that.

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So you can still leave that to the model.

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But if it throws away our uncommitted changes

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or it reads a key that's now in your transcript and you don't want that, that should still be a rule.

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So for example, let's say that we just never want Claude reading our .end file.

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Now by default, Automode is fine with this.

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So it would have just approved it.

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So if you want to make sure that Claude can never read this file, you should just add a deny rule

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and then commands like cat cannot open this file either

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but it's not always that straightforward because sometimes certain commands can have side effects

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so for example let's say

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that npm test here a very normal command it's just a test

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so automote runs it that's fine but

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when the script is running it runs code

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that you didn't write like your dependencies

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or maybe clod runs a script real quick

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that it wrote just to quickly check something so

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if one of those scripts is compromised it could just open

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that same end file or your ssh keys

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and send those to a server you've never heard of right

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and even if we were still there as humans approving everything honestly we would have just clicked allow

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because there's nothing to say no to it's just part of the script

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that in this example case npm test runs and permissions only decide

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if a tool call runs but they cannot limit what it can reach once it's running

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so we want to make sure that these kinds of scripts can still run

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because this is just part of you know how cloud can check its own work running tests

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so we cannot just block npm tests

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but we want to limit its side effects

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so really we just want to limit the environment

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that it's running in so if you're running it locally

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or on your own machine you can run commands like

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that in a sandbox so then you have control over

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which files in a command it can read

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which folders it can write to which hosts it can reach

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and the operating system enforces that also this also applies to everything that command then starts so any child processes

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so on its own that deny rule got checked by claude before the command runs

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but all it sees there is npm test so it doesn't see

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which files that scripts ends up opening but with the sandbox on

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that same rule gets passed on to the operating system

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so now when when

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that dependency tries to open our end file the operating system just doesn't let it

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and by default it can still read most of your machine

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so you'd want to add another rule for your ssh keys

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if you care about that um and it also cannot reach a host

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that wasn't approved but the sandbox only covers the shell commands

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that cloud runs and whatever those start but claude's own files your mcp servers

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and all of your hooks still run outside of it

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so the rest of your session still runs on your own machine

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and everything that's on there

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so ideally you want this whole thing to run somewhere where none of

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that is even there in the first place and

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that is a cloud session

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because there it gets its own machine with a fresh copy of a repo

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and this runs even when we close our laptop

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which is definitely something you want for these longer running sessions

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that run for hours so in this case this automatically gets rid of the end file issue

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because it's not in git and neither are my ssh keys

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or our github token and if it still needs an api key uh you can add

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that as a network secret where it will it will tell you like hey

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i'm missing an api key mid -session um

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so it can use it without actually ever sending it to the model

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and by default also in a cloud session network access is limited to things like package registries and github

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so you have to explicitly add those domains to your environment for claw to to reach other hosts okay

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so with a cloud session we can run these long running sessions even with our laptop closed

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and it keeps us safe

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because it runs in its own environment now it's still good to remember

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that this machine is disposable but the things that leave it aren't

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so a commit that pushed or a message it sent through a connector

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so we still run it in auto mode with our deny rules just commit it into the repo

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so they come along so it could still catch things like a force push

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or a secret and a commit all that kind of stuff

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and beyond just safety we also need to make sure

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that Claude is actually working on the right thing

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so next is verification

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and the nice thing about being in a loop uh like we kind of knew the work was good

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because we'd already kind of seen every change we'd proved everything

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but now if claude works for hours in the background we don't have

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that anymore and we're not really going to read every file at the end either

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so you know say

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that we ask it to move our auth to a new

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api well claude is very good at understanding what we want

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but there are still a lot of small decisions

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that it has to make along the way

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so with the exact same problems you know one run might move it over

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but leave the old api in there or one might move it

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but only for new logins and another one might move it

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but log everyone out and these all look pretty reasonable

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but it really helps to set up these verification points along the way

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so claude keeps verifying its own results and those can be anything

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that comes back as a pass or fail

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so tests a build a screenshot whatever you have

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so now we just want to make sure that we review these verification points.

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They're a lot shorter to review than if we just had to, you know, review the whole change at the end.

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So that's pretty reasonable.

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So if one of these runs would still log everyone out, it doesn't get past that first check,

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and then it just has to find another way.

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And there's a couple ways to set this up.

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The easiest one is, of course, just in your prompt.

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So, you know, you say what done looks like

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and ask it to split that into tasks so they have their own tests.

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And I also like to ask it to show the actual output

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because you weren't there to see it but again prompting is not a guarantee

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that a model will do it so for the ones

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that have to run guaranteed run i would use hooks

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which are just you know scripts that cloud code runs at a specific point

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and those give you a lot of control because you decide

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when they run and what they run and what they check

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so for example every time it edits a file

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we can run our linter every time

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it wants to mark a task as complete we can run the tests for what it changed um

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so you know if it touch our off code or something.

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It has to pass the off tests.

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And when it wants to finish the whole session, we can just run the entire test suite.

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And if one of those fails, it goes, oh, that's still broken.

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It goes back until it passes.

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So it fixes it.

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Now, just one thing, when a test fails, by default, most tools that exit with a one exit code.

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But with a one, that task by Cloud Code just gets marked as completed anyway.

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So make sure that your scripts exit with a two exit code

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because that's what actually sends cloud back to fix it

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so okay now we have one session that i'm pretty comfortable with leaving alone

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so now we can start with a few more of those

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because they've all got their own machine

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so they're you know not all working in the same folder

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and we don't really have to think about work trees too much ourselves anymore

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but then we still start every session ourselves

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and we review every one of them

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and honestly this is already a pretty good place to be

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we are still fully in control over what gets started and

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when we call a task done

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but even there um you know we're still the ones kicking off every session

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and we're still in the loop for all of them

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so i think the most important thing to have in place here now is your ci

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because all of these sessions eventually open a pr

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and your ci runs the same checks on every one of them no matter how

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that session was set up or you know what claude decided to do along the way.

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And if you turn on autofix, we have like CI autofix,

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Cloud can also see when one of those checks fails and then go back to fix it.

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So you're not the one spending your review on things that, you know, a check could have already caught.

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And for some of them, you can even turn on merge when ready.

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So then GitHub merges the PR once all of the checks have passed.

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So you're not in the loop to review.

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But again, that's not the default.

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And that really depends on how risky the changes

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so for example on our team every pr gets reviewed by cloud first

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so not by the session that wrote it

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so it comes with a fresh context

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and also a separate group of agents to just double check every bug it finds

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and then how much we review ourselves just depends on the risk

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so smaller changes like docs or copy they don't need a person so once the automated checks are green

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we're pretty good to go.

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Maybe ordinary product changes just need one reviewer, and then risky changes might need two.

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Now, ultimately, kind of where we see things going, and we're already kind of doing more of that adnthropic,

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is that you're not really starting all of those sessions yourself either.

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Because if you're anything like me, I'm terrible at context switching, so having to manage so many sessions at the same time doesn't always go well.

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So instead, you just have one main session that's your orchestrator

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and you can already see this in things like cloud code projects

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which is still in beta but you just tell it what it needs to be done

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and the orchestrator splits it up and then starts other sessions for each task

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and it keeps track of what comes back so it automatically starts

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and verifies these threads which are just new sessions

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so instead of talking to eight sessions you're just talking to one

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and the main session doesn't write the code itself

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so there you want a model that's really good at deciding what to do

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and judging what comes back a model like fable and

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if something comes back that isn't actually done it just you know sends it back

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so until it's actually done and passes everything

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and the threads need a model that's good at actually doing the work like opus 55

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and you can set those separately so you know one model for the main session

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and then another one for the threads and another benefit is

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that with this setup with cloud code projects specifically we don't manage context anymore that's all done automatically for us

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so we no longer have to think about you know

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when to compact or clear all of that stuff okay so

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if you look back at those old best practices they're all still there but they've just moved

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so the model sears it now um auto mode approves your deny rules

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and the environment restrict what's possible your test your hooks

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and your ci check set and then ultimately cloud can just start them as well

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so almost everything we used to do ourselves is now either the model the harness

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or the environments and we're really just here to start

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that first one and to just review what comes out so

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if you want to try this in your own setup

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i would say just take one thing

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that's way bigger than you normally give claude make sure your ci actually catches the things you care about

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and then spend a bit of time just configuring your environment like it's network access it's secret

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and it's you know setup script and then start in the cloud

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and see where your sessions get stuck and where you're still in the loop

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because that's the next thing to hand over to claude

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i also highly recommend checking out our best practices in the docs as well thank you so much

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FOR YOU

Лексика и советы по произношению к этому уроку

Этот урок разговорной практики построен на видео «Rethinking Claude Code Best Practices — Lydia Hallie, Anthropic». Чаще всего повторяются слова: session, model, command, code, cloud. В этом видео 286 предложений и 3581 слов для шедоуинга. Речь длится 17:31. Говорящий говорит быстро, около 204 слов в минуту, поэтому звуки часто сливаются и сокращаются. 86% слов входят в 3000 самых частых слов английского языка; остальные стоит разобрать перед занятием.

Ключевая лексика этого видео

15 слов из видео, которые стоит выучить, с произношением и значением:

Слово	Произношение	Значение
cloud существительное	/ˈklaʊ̯d/	о́блако, ту́ча
loop существительное	/luːp/	пе́тля, петля́
approve глагол	/əˈpɹuːv/	утвержда́ть, утверди́ть
default существительное	/dɪˈfɔlt/	дефо́лт, неплатёж
script существительное	/skɹɪpt/	скрипт, письмо́
deny глагол	/dəˈnaɪ/	отрица́ть, отверга́ть
guarantee существительное	/ˌɡæɹ.ənˈtiː/	гара́нтия, пору́ка
exit существительное	/ˈɛɡzət/	вы́ход
verify глагол	/ˈvɛɹɪfaɪ/	дока́зывать, доказа́ть
verification существительное	/ˌvɛ.ɹə.fɪˈkeɪ.ʃən/	прове́рка, верифика́ция
thread существительное	/ˈθɹɛd/	нить, ни́тка
output существительное	/ˈaʊtpʊt/	произво́дство, проду́кция
hook существительное	/hʊk/	крюк, крючо́к
commit глагол	/kəˈmɪt/	вверя́ть
nowadays наречие	/ˈnaʊ.ə.deɪz/	в на́ше вре́мя, тепе́рь

Фразовые глаголы, которые вы услышите

Слово	Произношение	Значение
come back глагол		возвраща́ться, возврати́ться
take over глагол		брать на себя́, взять на себя́
set up глагол	/ˌsɛt ˈʌp/	устана́вливать, установи́ть
check out глагол		проверя́ть, прове́рить
come along глагол		сопровожда́ть, составля́ть компа́нию
come down to глагол		спадать до
come out глагол	/ˌkʌm ˈaʊt/	выходи́ть, вы́йти
end up глагол		зака́нчиваться, зако́нчиться

Грамматика в этом видео

Конструкции, которые говорящий использует чаще всего, с точными словами из видео:

Конструкция	В видео
«Used to» used to + глагол — прошлая привычка или состояние, которых больше нет	used to look · used to be · used to do
Present Perfect have/has + причастие прошедшего времени — прошлое действие, важное сейчас	have gotten · we've now essentially become · we've already gotten
Пассивный залог be + причастие прошедшего времени — важно, что происходит, а не кто это делает	is compromised · wasn't approved · was set

Произношение, на которое стоит обратить внимание

Говорящий использует 63 сокращённых и редуцированных форм, например we're, don't, you're. Произносите их коротко, так, как слышите.

Звуки «th»: thread /ˈθɹɛd/, rethink /ɹiːˈθɪŋk/, auth /ɔːθ/
Звуки «sh» и «zh»: verification /ˌvɛ.ɹə.fɪˈkeɪ.ʃən/, essentially /ɪˈsɛnʃəli/, shell /ʃɛl/, instruction /ɪnˈstɹʌkʃən/, supervision /ˌs(j)uːpəˈvɪʒən/
Длинные слова — следите за ударением: verification /ˌvɛ.ɹə.fɪˈkeɪ.ʃən/, dependency /dɪˈpɛndənsi/, essentially /ɪˈsɛnʃəli/, ordinary /ˈɔɹdɪnɛɹi/, difficulty /ˈdɪfɪkəlti/

Звуки, трудные для русскоязычных:

/w/ — губы округлены, это не /v/: whereas /(h)wɛɹˈæz/, suite /swiːt/, straightforward /ˌstɹeɪtˈfɔː(ɹ)wə(ɹ)d/
/h/ — лёгкий выдох, а не русское «х»: hook /hʊk/, harness /ˈhɑɹ.nəs/, whereas /(h)wɛɹˈæz/
Звонкие согласные в конце слова — не оглушайте их: cloud /ˈklaʊ̯d/, approve /əˈpɹuːv/, thread /ˈθɹɛd/, nowadays /ˈnaʊ.ə.deɪz/, depend /dɪˈpɛnd/

Как заниматься с этим видео

Прослушайте всё видео один раз молча и выпишите незнакомые слова.
Начните со скорости 0,75×, повторяйте предложение за предложением и вернитесь к обычной скорости, когда станет легко.
Запишите себя и сравните с оригиналом, обращая внимание на такие слова, как cloud, loop, approve.

Что такое техника Shadowing?

Shadowing — это научно обоснованная техника изучения языка, изначально разработанная для подготовки профессиональных переводчиков и популяризированная полиглотом доктором Александром Аргуэльесом. Метод прост, но эффективен: вы слушаете аудио на английском от носителей языка и немедленно повторяете вслух — как тень, следующая за говорящим с задержкой в 1–2 секунды. В отличие от пассивного прослушивания или грамматических упражнений, Shadowing заставляет мозг и мышцы рта одновременно обрабатывать и воспроизводить реальные речевые паттерны. Исследования показывают, что это значительно улучшает точность произношения, интонацию, ритм, связную речь, понимание на слух и беглость речи — что делает его одним из самых эффективных методов для подготовки к IELTS Speaking и реального общения на английском.

Техника шедоуинга: читать полное пошаговое руководство →

Практика Shadowing: Rethinking Claude Code Best Practices — Lydia Hallie, Anthropic - Изучайте разговорный английский по видео

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Что такое техника Shadowing?