README.md

Copilot Reasoning Effort Defaults

This optional Linux feature patches Codex webview bundles so Copilot-auth sessions can persist and select reasoning effort defaults for new chats.

By default, upstream Copilot-auth paths only read and write copilot-default-model, hardcode the loaded reasoning effort to medium, and collapse Copilot model reasoning effort choices to one medium entry. This feature keeps those changes local and opt-in instead of shipping them as a core Linux compatibility patch.

Enable it by copying linux-features/features.example.json to linux-features/features.json and adding the feature id:

{
  "enabled": [
    "copilot-reasoning-effort"
  ]
}

Then rerun the install or package build so the ASAR patch step can apply the feature to the generated app.

What It Patches

• The current ...thread-app-shell~cf704xib-*.js bundle reads and writes copilot-default-reasoning-effort next to copilot-default-model and keeps the model's full supportedReasoningEfforts list for Copilot auth.
• The current ...~ho~iufn7mg3-*.js bundle keeps the reasoning effort controls and /reasoning command enabled when the normal model and effort prerequisites are present.

Validation

Run the feature tests with:

node --test linux-features/copilot-reasoning-effort/test.js

Or run all feature tests with:

node --test linux-features/*/test.js

The patch is fail-soft. If the upstream minified bundle shape changes, the build logs a warning and leaves the affected bundle unchanged.