devx/docs/specs/DEVX-166.md

DEVX-166: Exclude docs/plans/* from PR size check

Problem

Planning docs in docs/plans/ are legitimately large (700+ lines) but fail the PR size check (max 500 lines). This blocks PRs that only add planning documents.

Approach

REQ-1: Add docs/plans/* to DEFAULT_EXCLUDED_PATTERNS in src/devx/ci/check_pr_size.py REQ-2: Add test coverage for the new exclusion pattern

Test Plan

• make pytest-cov passes with 100% coverage
• make lint-all passes

Deploy Plan

• Merge to master → post-merge auto-publishes new devx version
• Infra PR #1179 picks up the fix once devx is bumped

Rollback Plan

• Revert the merge commit

Acceptance Criteria

• REQ-1: Add docs/plans/* to DEFAULT_EXCLUDED_PATTERNS in src/devx/ci/check_pr_size.py
• REQ-2: Add test coverage for the new exclusion pattern