[teamleaderleo]

No bead: base red, coordinator request.

cmux-tui/crates/acpmux/src/hub/mod.rs had grown to 1003 lines on feat-cmux-next, over the Rust god-file limit of 1000 and not in the baseline. Any PR that touched the file failed hosted lint (linux) on the Rust god-file check ("split it").

Move only, no logic changes. The hub's startup group moves verbatim from hub/mod.rs into an impl Hub block in the new hub/startup.rs:

• begin_startup
• finish_startup
• after_login_env
• startup_complete
• wait_startup
• verify_launchers

The only edit inside the moved code is wait_startup's visibility, pub(super) → pub(crate). In hub/mod.rs, pub(super) meant visible to the crate; from the deeper hub/startup.rs the same reach needs pub(crate). The new file adds only a module comment, four use lines and the impl Hub {} wrapper. hub/mod.rs gains mod startup;.

A line-multiset diff of the old file against the two new ones shows no other removed or added lines.

hub/mod.rs: 1003 → 888 lines.

Testing

• rustfmt --check on both files; crash ratchet OK.
• Hosted verify-cmux-tui-hosted.sh (lint, build, tests, with the login_env filter, which runs the startup tests): results below.

Changelog

none

🤖 Generated with Claude Code

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Summary by cubic

Refactors the hub module by moving the startup group into a new hub/startup.rs, bringing hub/mod.rs from 1003 to 888 lines and clearing the 1000-line god-file lint check.

This is a move-only change. The startup methods (begin_startup, finish_startup, after_login_env, startup_complete, wait_startup, verify_launchers) move verbatim into an impl Hub block in the new file. The only edit is wait_startup's visibility from pub(super) to pub(crate), which preserves the same reach from the deeper module.

^{Written for commit c7cd706. Summary will update on new commits.}

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[teamleaderleo]

Bead cx-lmnmc created for this PR by the cmux coordinator.

[teamleaderleo]

Hosted Rust verify on this head (c7cd706): lint (linux), which includes the god-file check, test (linux) and the aarch64-apple-darwin build all passed. The macOS lint and tests job was still queued (no runner) after about 90 min and was not run; this is a move-only change and it compiles on macOS. Run: https://github.com/manaflow-ai/cmux/actions/runs/38602056080. PR checks: 77/77 green.

[github-actions]

The feat-cmux-next push run https://github.com/manaflow-ai/cmux/actions/runs/38614968020 at 0b83e73 failed: cmux-next Release compile (Xcode 26).
Those jobs last passed at 72e64ec. This pull request is one of 5 merged since: #20707, #20695, #20696, #20689, #20686.
If the failure is in your change, fix forward on feat-cmux-next. Pull requests run only the tiers their paths reach (docs/ci/cmux-next-tiers.md); label a batch PR full-ci to run them all before merging.