test(sync): compare cowork shadow parity

Cowork is a sidecar-backed Claude transcript provider, so add source-level migration coverage that compares provider observation with ParseCoworkSession.

The fixture includes local-agent metadata plus the nested Claude transcript and verifies session, messages, usage, excluded IDs, and data-version planning parity while preserving provider-computed hashes.

Validation: go test -tags "fts5" ./internal/parser ./internal/sync -run 'TestObserveProviderSourceMatchesCoworkLegacyParser|TestCoworkProvider|TestParseCowork|TestClassifyCoworkPath' -count=1; go test -tags "fts5" ./internal/parser ./internal/sync -count=1; go fmt ./...; go vet ./...; ./custom-gcl run --config .golangci.nilaway.yml ./internal/parser/... ./internal/sync/...; git diff --check

Author: mariusvniekerk

internal/sync/provider_shadow_cowork_test.go

@@ -0,0 +1,94 @@
+package sync
+
+import (
+	"context"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"go.kenn.io/agentsview/internal/parser"
+)
+
+func TestObserveProviderSourceMatchesCoworkLegacyParser(t *testing.T) {
+	root := t.TempDir()
+	cli := "c0000000-0000-4000-8000-000000000201"
+	sessionUUID := "50000000-0000-4000-8000-000000000201"
+	workspaceDir := filepath.Join(root, "org", "workspace")
+	sessionDir := filepath.Join(workspaceDir, "local_"+sessionUUID)
+	metaPath := sessionDir + ".json"
+	transcriptPath := filepath.Join(
+		sessionDir,
+		".claude",
+		"projects",
+		"-Users-dev-code-demo",
+		cli+".jsonl",
+	)
+	writeProviderShadowSourceFile(t, metaPath, coworkShadowMeta(sessionUUID, cli))
+	writeProviderShadowSourceFile(
+		t,
+		transcriptPath,
+		strings.Join(coworkShadowTranscript(cli), "\n")+"\n",
+	)
+
+	provider, ok := parser.NewProvider(parser.AgentCowork, parser.ProviderConfig{
+		Roots:   []string{root},
+		Machine: "devbox",
+	})
+	require.True(t, ok)
+	sources, err := provider.Discover(context.Background())
+	require.NoError(t, err)
+	require.Len(t, sources, 1)
+
+	legacyResults, legacyExcluded, err := parser.ParseCoworkSession(
+		transcriptPath,
+		"devbox",
+	)
+	require.NoError(t, err)
+	require.Len(t, legacyResults, 1)
+
+	observation, err := ObserveProviderSource(context.Background(), provider, ProviderObserveRequest{
+		Source:  sources[0],
+		Machine: "devbox",
+	})
+	require.NoError(t, err)
+	require.Len(t, observation.Results, 1)
+	legacyResults[0].Session.File.Hash = observation.Fingerprint.Hash
+
+	assert.Equal(t, legacyResults[0].Session, observation.Results[0].Session)
+	assert.Equal(t, legacyResults[0].Messages, observation.Results[0].Messages)
+	assert.Equal(t, legacyResults[0].UsageEvents, observation.Results[0].UsageEvents)
+	assert.Equal(t, legacyExcluded, observation.ExcludedSessionIDs)
+	assert.Equal(t, []string{legacyResults[0].Session.ID}, observation.Planned.DataVersionSessionIDs())
+	assert.Empty(t, observation.Planned.Diagnostics)
+}
+
+func coworkShadowMeta(sessionUUID, cli string) string {
+	return `{"sessionId":"local_` + sessionUUID + `",` +
+		`"cliSessionId":"` + cli + `",` +
+		`"title":"Provider title",` +
+		`"userSelectedFolders":["/Users/dev/code/demo"],` +
+		`"createdAt":1772373600000,` +
+		`"lastActivityAt":1772373605000}`
+}
+
+func coworkShadowTranscript(cli string) []string {
+	return []string{
+		`{"type":"ai-title","aiTitle":"Auto title","sessionId":"` + cli + `"}`,
+		`{"type":"user","uuid":"u1","parentUuid":null,` +
+			`"sessionId":"` + cli + `","cwd":"/Users/dev/code/demo",` +
+			`"gitBranch":"main","version":"2.1.119",` +
+			`"timestamp":"2026-03-01T10:00:00.000Z",` +
+			`"message":{"role":"user","content":"provider question"}}`,
+		`{"type":"assistant","uuid":"a1","parentUuid":"u1",` +
+			`"sessionId":"` + cli + `","requestId":"req_1",` +
+			`"timestamp":"2026-03-01T10:00:05.000Z",` +
+			`"message":{"role":"assistant","id":"msg_1",` +
+			`"model":"claude-sonnet-4-6","stop_reason":"end_turn",` +
+			`"content":[{"type":"text","text":"Done."}],` +
+			`"usage":{"input_tokens":10,"cache_read_input_tokens":2,` +
+			`"output_tokens":5}}}`,
+	}
+}