feat(coder/modules/claude-code): add enable_state_persistence variable

[mafredri]

Expose the new enable_state_persistence variable from the agentapi sub-module so users can control conversation state persistence across workspace restarts.

The agentapi module (v2.2.0, from #736) added state persistence support. This PR threads the toggle through to the claude-code wrapper module. The state_file_path and pid_file_path variables remain internal to agentapi -- only the enable/disable toggle is surfaced.

Changes:

• Add enable_state_persistence variable (bool, default true) to main.tf
• Pass it through to the module "agentapi" block
• Bump agentapi version from 2.0.0 to 2.2.0
• Add plan-level tests for default-on and explicit-off
• Add State Persistence section to README
• Minor version bump to 4.8.0

Refs coder/internal#1258

Generated with Mux using Claude

[DevelopmentCats]

@mafredri

Does this play nicely with the existing claude-code session resumption logic?

Provided it does LGTM. I can give this some testing as well.

[mafredri]

@DevelopmentCats it will once coder/agentapi#177 is released as well as #736.

And thanks for the offer to help testing! I've actually created a template to test this out on dev.coder.com (tasks-pause-resume-beta). It builds agentapi from the branch and uses this PR and #736 as close to verbatim as possible.

[35C4n0r]

Tested, works as expected :)
Quick question, @DevelopmentCats do we allow users to update the task prompt ?

[DevelopmentCats]

Tested, works as expected :) Quick question, @DevelopmentCats do we allow users to update the task prompt ?

@35C4n0r Are you referring to being able to update the task prompt when the workspace is stopped and started again?

I believe that you altering this prompt will not trigger the prompt to send again if session resumption is enabled.

[mafredri]

I merged the agentapi module changes and bumped it to v2.2.0. This is now ready for merge as well (and has been tested in the aforementioned Coder template on dogfood).