Stop tracking Vercel local artifacts via root ignore guard

[Copilot]

Canonical issue

Outcome

Prevents Vercel local build/diagnostic residue from entering git so deploys continue to rebuild from source state.

• Ignore policy hardening: root ignore rules now cover Vercel debug diagnostics in addition to .vercel output.
• Regression guard: a focused unit test now enforces both entries as repository hygiene invariants.

.vercel
vercel-debug.log*

Scope

• Included:
  • Update /home/runner/work/EventRelay/EventRelay/.gitignore with vercel-debug.log*
  • Add /home/runner/work/EventRelay/EventRelay/tests/unit/test_vercel_artifact_hygiene.py to lock the rule
• Explicitly excluded:
  • Runtime/app logic changes
  • Deployment flow or Vercel adapter behavior changes
  • Broad repo hygiene refactors

Risk

• Risk level: low
• Failure mode: local debug logs could be recommitted if ignore rule is removed or altered.
• Rollback: revert the .gitignore line and associated test file in one commit.

Verification

List exact automated and manual checks, tied to the current head SHA.

• Focused tests
• Required CI
• Review threads resolved

Production evidence

Not applicable: change is repository hygiene + test coverage only; no runtime or deployment-path behavior change.

Agent handoff

• One canonical issue is linked
• No competing PR implements the same issue
• Acceptance criteria are satisfied
• Required checks pass on the current head
• Human decision is requested only for product, security, irreversible infrastructure, or production approval

• Fixes Stop committing Vercel build artifacts to the repo #1642

[vercel]

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Project	Deployment	Actions	Updated
v0-uvai	Ready	Preview, v0	Sep 8, 2026 11:52pm UTC