fix(claude-desktop): explain pre-apply gateway state

[luvs01]

Motivation

• The CLI could misattribute a gateway preference to a machine when that gateway marker had just been written by the current apply invocation, producing misleading advice to run ocx claude desktop apply --first-party on a fresh fallback.

Description

• Capture a pre-apply configuration snapshot with const preApplyConfig = loadConfig() and use it for parsing and mode explanation so post-apply writes do not alter the reasoning presented to the user.
• Pass preApplyConfig into parseDesktopApplyArgs and into gatewayModeExplanation instead of reloading the config after the apply.
• Add a CLI-level regression assertion in tests/claude-integration/claude-desktop-cli.test.ts that disables the intercept and verifies the implicit gateway fallback does not recommend --first-party.

Testing

• Ran bun run typecheck which completed successfully without type errors.
• Ran repository checks (git diff --check) and ensured the working tree is clean after the change.
• Attempted focused tests with bun test tests/claude-integration/claude-desktop-mode-explanation.test.ts tests/claude-integration/claude-desktop-cli.test.ts, but the test run could not load due to the container's Bun 1.2.14 missing the node:zlib zstdDecompressSync export, so the tests did not execute in this environment.

---

Codex Task

---

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: Repository: luvs01/opencodex/.coderabbit.yaml

Review profile: ASSERTIVE

Plan: Advanced

Run ID: c2b743f3-9738-47ed-8a4d-5d0395af329d

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-21T02:37:59.037120Z	7597bce	PR opened

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[github-actions]

✅ Deterministic PR hygiene checks passed.