Make the backfill refusal test use a genuinely unrelated repository

Two repositories built from identical content, author, and second produce
byte-identical commit objects, so the unrelated repository shared the
very boundary the refusal test needed it to miss, and the import it should
have refused succeeded. The content now carries the repository's name, and
the test asserts the repositories really are unrelated before drawing any
conclusion from the refusal.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KnhfrafYx5ZGaMbzZEJQ2d

Co-Authored-By

Claude Opus 5 (1M context) <noreply@anthropic.com>

Claude-Session

https://claude.ai/code/session_01KnhfrafYx5ZGaMbzZEJQ2d

Deploy story

What this commit did to the running system — joined from the forge receipt chain, the part a commit page elsewhere cannot show.

pushed

by user · WAL seq 384 · 2026-08-25T14:43:34.402022Z

Changed files

• modified test/openagents/forge/backfill_test.exs

Diff

1 file changed, +11 -2

    bundle = Path.join(base, "unrelated.bundle")

    sh!(unrelated, "git", ["bundle", "create", bundle, "--all"])

    # The refusal below means nothing unless this repository really is

    # unrelated, so say so rather than assume it.

    [boundary] = Backfill.open_boundaries(storage_key)

    refute sh!(unrelated, "git", ["rev-list", "--all"]) =~ boundary

    assert {:error, {:still_grafted, [_boundary]}} =

             Backfill.import_history(storage_key, bundle, "operator:test")

    sh!(source, "git", ["config", "user.email", "test@example.com"])

    sh!(source, "git", ["config", "user.name", "Forge Test"])

    # The content carries the repository's name because two repositories built

    # from identical content, author, and second produce byte-identical commit

    # objects — and therefore the same SHAs, which would make an "unrelated"

    # repository share the very boundary the refusal test needs it to miss.

    Enum.each(1..4, fn n ->

      File.write!(Path.join(source, "history-#{n}.txt"), "history #{n}\n")

      File.write!(Path.join(source, "history-#{n}.txt"), "#{name} history #{n}\n")

      sh!(source, "git", ["add", "."])

      sh!(source, "git", ["commit", "-m", "history #{n}"])

      sh!(source, "git", ["commit", "-m", "#{name} history #{n}"])

    end)

    source