test: add bats test suite for lib/ helper scripts

110 tests across 10 test files covering all lib/ scripts:
- archeflow-event.sh: JSONL format, seq numbering, parent fields, validation
- archeflow-memory.sh: add/list/decay/forget/inject/extract commands
- archeflow-git.sh: branch creation, commit format, merge strategies, safety
- archeflow-report.sh: markdown output, summary mode, in-progress handling
- archeflow-progress.sh: progress.md generation, JSON mode, error handling
- archeflow-score.sh: archetype scoring, effectiveness report, validation
- archeflow-dag.sh: DAG rendering, color flags, tree structure
- archeflow-rollback.sh: arg parsing, phase validation, mutual exclusivity
- archeflow-init.sh: template listing, clone from project, arg validation
- archeflow-review.sh: diff modes, stats, branch/commit range review

Includes test_helper.bash (shared setup/teardown with temp git repos)
and scripts/run-tests.sh runner.

tests/archeflow-progress.bats

@@ -0,0 +1,78 @@
+# Tests for archeflow-progress.sh — live progress file generation.
+#
+# Validates: markdown output structure, JSON mode, missing events handling, exit codes.
+
+setup() {
+  load test_helper
+  _common_setup
+
+  # Create standard events for progress tests
+  mkdir -p .archeflow/events
+  cat > ".archeflow/events/test-run.jsonl" <<'EVENTS'
+{"ts":"2026-04-03T10:00:00Z","run_id":"test-run","seq":1,"parent":[],"type":"run.start","phase":"plan","agent":null,"data":{"task":"Build feature","workflow":"standard","team":"default"}}
+{"ts":"2026-04-03T10:01:00Z","run_id":"test-run","seq":2,"parent":[1],"type":"agent.complete","phase":"plan","agent":"creator","data":{"archetype":"creator","duration_ms":60000,"tokens":1500,"estimated_cost_usd":0.02,"summary":"Planned"}}
+EVENTS
+}
+
+@test "progress: exits 1 with usage when called with no args" {
+  run "$LIB_DIR/archeflow-progress.sh"
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"Usage"* ]]
+}
+
+@test "progress: exits 1 when events file not found" {
+  run "$LIB_DIR/archeflow-progress.sh" nonexistent-run
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"not found"* ]]
+}
+
+@test "progress: default mode generates progress.md" {
+  run "$LIB_DIR/archeflow-progress.sh" test-run
+  [ "$status" -eq 0 ]
+  [ -f ".archeflow/progress.md" ]
+  [[ "$output" == *"# ArcheFlow Run: test-run"* ]]
+  [[ "$output" == *"Status:"* ]]
+  [[ "$output" == *"Progress"* ]]
+}
+
+@test "progress: json mode outputs valid JSON" {
+  run "$LIB_DIR/archeflow-progress.sh" test-run --json
+  [ "$status" -eq 0 ]
+  echo "$output" | jq empty
+  local run_id
+  run_id=$(echo "$output" | jq -r '.run_id')
+  [ "$run_id" = "test-run" ]
+}
+
+@test "progress: json mode includes completed agents" {
+  run "$LIB_DIR/archeflow-progress.sh" test-run --json
+  [ "$status" -eq 0 ]
+  local completed_count
+  completed_count=$(echo "$output" | jq '.completed | length')
+  [ "$completed_count" -eq 1 ]
+  local agent
+  agent=$(echo "$output" | jq -r '.completed[0].agent')
+  [ "$agent" = "creator" ]
+}
+
+@test "progress: json mode shows correct phase" {
+  run "$LIB_DIR/archeflow-progress.sh" test-run --json
+  [ "$status" -eq 0 ]
+  local phase
+  phase=$(echo "$output" | jq -r '.phase')
+  [ "$phase" = "plan" ]
+}
+
+@test "progress: reports error in json when events file missing" {
+  run "$LIB_DIR/archeflow-progress.sh" missing-run --json
+  # JSON mode returns the JSON even on error
+  local error
+  error=$(echo "$output" | jq -r '.error // empty')
+  [[ "$error" == *"not found"* ]]
+}
+
+@test "progress: rejects unknown flags" {
+  run "$LIB_DIR/archeflow-progress.sh" test-run --invalid
+  [ "$status" -eq 1 ]
+  [[ "$output" == *"Unknown flag"* ]]
+}