Add per-CDP control for Network.setCacheDisabled

[staylor]

Summary

• add LP.configureCDP with a disableSetCacheDisabled option
• scope the option to the current CDP connection and keep existing behavior by default
• allow browser-target CDP sessions to be created before a browser context exists
• acknowledge but ignore Network.setCacheDisabled while the option is enabled

Usage

const client = await browser.newBrowserCDPSession();
await client.send("LP.configureCDP", {
  disableSetCacheDisabled: true,
});

Sending the option as false restores the standard handling of subsequent Network.setCacheDisabled commands.

Motivation

Automation libraries can send Network.setCacheDisabled(true) as a side effect of enabling request interception. That makes a configured HTTP cache ineffective even when the caller wants interception and caching to coexist.

The custom command provides an explicit, per-connection override without adding a library-specific CLI flag or changing the default cache policy.

Validation

• zig fmt --check ./*.zig ./**/*.zig
• added unit coverage for configuration toggling and both cache-disable paths
• added coverage for creating a browser-target session before a browser context
• make test reached the final local link step, which is blocked on this machine by a Nix/macOS framework search-path mismatch; CI provides the authoritative full run

[krichprollsch]

@staylor thanks for the PR and the issue. I didn't know playwright disable cache when request interception are set.
I'm not sure with this new flag which is very specific to this playwright's behavior...

What if we add instead a custom LP.configureCDP with something like disableSetCacheDisabled: true you could call with:

const client = await browser.newBrowserCDPSession();
await client.send('LP.configureCDP', {
  disableSetCacheDisabled: true,
});

[staylor]

What if we add instead a custom LP.configureCDP

@krichprollsch I'll take a pass at it

[staylor]

@krichprollsch Implemented—thanks for the suggestion. The PR now adds the per-connection command:

const client = await browser.newBrowserCDPSession();
await client.send("LP.configureCDP", {
  disableSetCacheDisabled: true,
});

The default Network.setCacheDisabled behavior is unchanged, and sending false restores normal handling for subsequent commands. I also updated browser-target sessions so this configuration can be applied before creating a browser context, and removed the interception-specific CLI flag.

[krichprollsch]

thanks!