plugins/claude/code/scripts/check-coverage.sh
Snider bd4207c806 feat(hooks): implement expose/hide output policy (#17)
Add consistent policy for what hook output to show vs suppress:
- EXPOSE: errors, warnings, debug statements, uncommitted work
- HIDE: format success, coverage stable, pass confirmations

New files:
- output-policy.sh: helper functions (expose_error, expose_warning, hide_success)
- hook-output-policy.md: documentation

Updated hooks to use proper Claude Code JSON output format:
- check-debug.sh: expose warnings via additionalContext
- post-commit-check.sh: expose uncommitted work warnings
- check-coverage.sh: expose coverage drops
- go-format.sh: suppress output on success
- php-format.sh: suppress output on success

Closes #17

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-02-02 15:08:07 +00:00

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#!/bin/bash
# Check for a drop in test coverage.
# Policy: EXPOSE warning when coverage drops, HIDE when stable/improved
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$SCRIPT_DIR/output-policy.sh"
# Source the main coverage script to use its functions
source claude/code/commands/coverage.sh 2>/dev/null || true
read -r input
# Get current and previous coverage (with fallbacks)
CURRENT_COVERAGE=$(get_current_coverage 2>/dev/null || echo "0")
PREVIOUS_COVERAGE=$(get_previous_coverage 2>/dev/null || echo "0")
# Compare coverage
if awk -v current="$CURRENT_COVERAGE" -v previous="$PREVIOUS_COVERAGE" 'BEGIN {exit !(current < previous)}'; then
DROP=$(awk -v c="$CURRENT_COVERAGE" -v p="$PREVIOUS_COVERAGE" 'BEGIN {printf "%.1f", p - c}')
expose_warning "Test coverage dropped by ${DROP}%" "Previous: ${PREVIOUS_COVERAGE}% → Current: ${CURRENT_COVERAGE}%"
else
pass_through "$input"
fi