Personal fork setup: .bnpnecode home dir, worktree default, .env* carryover

[bnpne]

What Changed

• Renamed the default home directory from ~/.t3 to ~/.bnpnecode across the dev runner, desktop fallback, SSH remote launcher, .gitignore, and tests. The T3CODE_HOME env var name is unchanged, so existing overrides still work.
• resolveEffectiveEnvMode now defaults a brand-new draft thread to "worktree" instead of "local". Behavior when already inside a worktree is unchanged.
• After git worktree add succeeds, root-level .env* files are copied from the source repo into the new worktree so threads inherit env vars. Copy failures are swallowed per-file and never fail the worktree creation.
• Added BUILD.md with personal-build + GitHub-Releases-based auto-update instructions.

Why

Personal-fork ergonomics: I want a single command to build a self-updating app for myself, and I want every new thread to land in its own worktree with .env* already populated so I don't have to re-paste secrets each time.

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes (n/a)
• I included a video for animation/interaction changes (n/a)

---

Note

Medium Risk
Medium risk because it changes default filesystem locations and environment/worktree behavior, which can affect existing local state and thread/worktree creation flows across desktop, SSH, and dev tooling.

Overview
Shifts the default T3 Code data directory from ~/.t3 to ~/.bnpnecode across the desktop app, SSH remote launch/pairing scripts, dev runner defaults/tests, and .gitignore (while keeping T3CODE_HOME as the override).

Adjusts branch toolbar logic so a brand-new draft thread defaults to worktree mode unless explicitly set to local.

Enhances GitVcsDriver.createWorktree to copy root-level .env* files into newly created worktrees (best-effort; failures are swallowed), and adds BUILD.md documenting personal desktop builds with GitHub Releases-based auto-updates.

^{Reviewed by Cursor Bugbot for commit 574e78a. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Change default home directory from ~/.t3 to ~/.bnpnecode and copy .env* files into new worktrees

• Updates all references to the default home directory (~/.t3 → ~/.bnpnecode) across the desktop app, dev runner, SSH tunnel scripts, and .gitignore.
• When creating a new git worktree, .env* files from the source repo root are now copied into the worktree directory; copy errors are silently ignored.
• Adjusts resolveEffectiveEnvMode fallback in BranchToolbar.logic.ts to default to 'worktree' mode unless the draft explicitly requests 'local'.
• Adds BUILD.md documenting how to build and release a personal desktop app with auto-updates.
• Behavioral Change: any existing data stored under ~/.t3 will not be migrated automatically; users must move it manually.

^{Macroscope summarized 574e78a.}

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[bnpne]

Apologies — opened against upstream by mistake. Moving to my fork. Please disregard.

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit 574e78a. Configure here.}

[cursor]

SSH stop/log scripts use stale .t3 path

High Severity

REMOTE_STOP_SCRIPT and REMOTE_LOG_TAIL_SCRIPT still reference $HOME/.t3/ssh-launch/ while REMOTE_LAUNCH_SCRIPT and REMOTE_PAIRING_SCRIPT (in the same file) were updated to $HOME/.bnpnecode/ssh-launch/. The launch script creates state (PID, port, log files) under .bnpnecode, but the stop script looks for them under .t3, so stopping a remote server and tailing its logs will silently fail to find the correct files.

Additional Locations (1)

• packages/ssh/src/tunnel.ts#L652-L653

 

^{Reviewed by Cursor Bugbot for commit 574e78a. Configure here.}

[macroscopeapp]

Approvability

Verdict: Needs human review

This PR has an unresolved high-severity bug where SSH stop/log scripts weren't updated with the new path, which will cause silent failures. Additionally, it changes runtime defaults (env mode flip to 'worktree') and adds new .env file copying behavior that warrant human review.

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