v7.78.6

Summary

• Fix /swarm close git alignment so a missing git executable is reported
  separately from a non-git directory, and transient git errors are reported
  separately from both.
• Preserve the existing reset behavior when the workspace is a real git repo.
• Update the adjacent close test suite to use canonical plan fixtures and a
  ledger-backed terminal-state helper.

Why

The close command was conflating git lookup failures ("git binary not found",
"spawnSync timeout") with "not a git repository," which hid the real failure
mode and forced manual archiving/reset handling.

The adjacent test suite had drifted from the current plan schema and ledger
identity rules, so it could no longer prove the terminal-write path accurately.

Migration

No migration required. The isGitRepo() function is retained as a thin wrapper
over the new getGitRepositoryStatus() so that callers outside the close path
are unaffected.

Caveats

• scripts/repro-704.mjs times out in both the branch worktree and a clean
  origin/main worktree in this environment; it is tracked as a pre-existing
  validation issue and is not part of this change.

7.78.6 (2026-06-17)

Bug Fixes

• close: distinguish git lookup failures (#1254) (37eb88f)

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