[BUG](ci) Tolerate no-package diff in the changelog fragment check

[Seth Fitzsimmons (sethfitz)]

Fixes #635.

Problem

The Require changelog on package change job aborts with a bare exit 1 on any PR whose diff touches no file under packages/ (a workflow-only, docs-only, or root-only change). The touched pipeline runs grep -oE "^packages/[^/]+/" under set -euo pipefail; with no packages/ path in the diff the grep matches nothing and exits 1, the command substitution inherits that status, and set -e kills the job before any output. The result is indistinguishable from a real missing-fragment failure: no ::error::, no package list, just exit 1.

The sibling has_fragment / has_changelog substitutions already guard their grep -c with || true; the touched pipeline was missed.

Observed on #626, a workflow-only publish fix, which was forced to carry a fragment to go green.

Change

Append || true to the touched pipeline, matching the existing guard. Real detection is unaffected — a package changed without a fragment still fails.

Verification

Ran the job logic against four diffs:

Diff	Before	After
workflow only (no package)	abort exit 1 (false fail)	pass
package changed, no fragment	fail	fail
package changed + fragment	pass	pass
fragment only	pass	pass

This PR is itself workflow-only. Because the check is on: pull_request, it runs this PR's fixed workflow, so the job exercises the fix on its own diff.

[github-actions]

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🕐 Updated	Aug 05, 2026 16:11 UTC
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[John McCall (lowlydba)]

I suggest closing this in favor of #645 which handles this + other latent concerns with the fragment check that need to be fixed for progressing the automation broadly