I want to know about X.
\",\n1431\t\t\tTags: []string{},\n1432\t\t})\n1433\t\trequire.NoError(t, err)\n1434\t\trequire.NotZero(t, q.ID)\n1435\t\tassert.Equal(t, \"How does X work?\", q.Title)\n1436\t\tassert.Equal(t, u.ID, q.UserID)\n1437\t\n1438\t\tgot, err := s.GetQuestion(ctx, q.ID)\n1439\t\trequire.NoError(t, err)\n1440\t\tassert.Equal(t, q.ID, got.ID)\n1441\t\tassert.Equal(t, \"How does X work?\", got.Title)\n1442\t}\n1443\t\n1444\tfunc TestListQuestions_Pagination(t *testing.T) {\n1445\t\ts := testStore(t)\n1446\t\tctx := context.Background()\n1447\t\n1448\t\tu, err := s.CreateUser(ctx, store.CreateUserParams{DisplayName: \"List Author\"})\n1449\t\trequire.NoError(t, err)\n1450\t\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM users WHERE id=$1\", u.ID) })\n1451\t\n1452\t\tfor i := 0; i < 3; i++ {\n1453\t\t\tq, err := s.CreateQuestion(ctx, store.CreateQuestionParams{\n1454\t\t\t\tUserID: u.ID, Title: \"Question\", BodyMarkdown: \"body\", BodyHTML: \"body
\",\n1455\t\t\t})\n1456\t\t\trequire.NoError(t, err)\n1457\t\t\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM questions WHERE id=$1\", q.ID) })\n1458\t\t}\n1459\t\n1460\t\tquestions, total, err := s.ListQuestions(ctx, store.ListQuestionsParams{Page: 1, PerPage: 2, Sort: \"newest\"})\n1461\t\trequire.NoError(t, err)\n1462\t\tassert.GreaterOrEqual(t, total, 3)\n1463\t\tassert.LessOrEqual(t, len(questions), 2)\n1464\t}\n1465\t```\n1466\t\n1467\t- [ ] **Step 2: Run test β expect compile error**\n1468\t\n1469\t```bash\n1470\tTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n1471\t go test -race ./internal/store/... -run TestCreateAndGetQuestion -v\n1472\t```\n1473\t\n1474\tExpected: compile error β `CreateQuestion` undefined.\n1475\t\n1476\t- [ ] **Step 3: Write `internal/store/questions.go`**\n1477\t\n1478\t```go\n1479\tpackage store\n1480\t\n1481\timport (\n1482\t\t\"context\"\n1483\t\t\"fmt\"\n1484\t\t\"strings\"\n1485\t)\n1486\t\n1487\tfunc (p *Postgres) ListQuestions(ctx context.Context, params ListQuestionsParams) ([]*Question, int, error) {\n1488\t\tif params.PerPage <= 0 {\n1489\t\t\tparams.PerPage = 20\n1490\t\t}\n1491\t\tif params.Page <= 0 {\n1492\t\t\tparams.Page = 1\n1493\t\t}\n1494\t\toffset := (params.Page - 1) * params.PerPage\n1495\t\n1496\t\torderBy := \"q.created_at DESC\"\n1497\t\tswitch params.Sort {\n1498\t\tcase \"active\":\n1499\t\t\torderBy = \"q.updated_at DESC\"\n1500\t\tcase \"votes\":\n1501\t\t\torderBy = \"q.score DESC, q.created_at DESC\"\n1502\t\tcase \"unanswered\":\n1503\t\t\torderBy = \"q.created_at DESC\"\n1504\t\t}\n1505\t\n1506\t\tconditions := []string{\"q.is_deleted = FALSE\"}\n1507\t\targs := []any{}\n1508\t\targIdx := 1\n1509\t\n1510\t\tif params.Sort == \"unanswered\" {\n1511\t\t\tconditions = append(conditions, \"q.is_answered = FALSE\")\n1512\t\t}\n1513\t\tif params.Tag != \"\" {\n1514\t\t\tconditions = append(conditions, fmt.Sprintf(`\n1515\t\t\t\tEXISTS (SELECT 1 FROM question_tags qt JOIN tags t ON t.id=qt.tag_id\n1516\t\t\t\t WHERE qt.question_id=q.id AND t.name=$%d)`, argIdx))\n1517\t\t\targs = append(args, params.Tag)\n1518\t\t\targIdx++\n1519\t\t}\n1520\t\tif params.Query != \"\" {\n1521\t\t\tconditions = append(conditions, fmt.Sprintf(\"q.search_vector @@ plainto_tsquery('english', $%d)\", argIdx))\n1522\t\t\targs = append(args, params.Query)\n1523\t\t\targIdx++\n1524\t\t}\n1525\t\n1526\t\twhere := \"WHERE \" + strings.Join(conditions, \" AND \")\n1527\t\n1528\t\tvar total int\n1529\t\tcountArgs := make([]any, len(args))\n1530\t\tcopy(countArgs, args)\n1531\t\terr := p.db.QueryRow(ctx,\n1532\t\t\tfmt.Sprintf(\"SELECT COUNT(*) FROM questions q %s\", where), countArgs...).Scan(&total)\n1533\t\tif err != nil {\n1534\t\t\treturn nil, 0, fmt.Errorf(\"count questions: %w\", err)\n1535\t\t}\n1536\t\n1537\t\tlistArgs := append(args, params.PerPage, offset)\n1538\t\trows, err := p.db.Query(ctx, fmt.Sprintf(`\n1539\t\t\tSELECT q.id, q.user_id, q.title, q.body_markdown, q.body_html,\n1540\t\t\t q.is_answered, q.is_deleted, q.is_obsolete,\n1541\t\t\t q.view_count, q.score, q.up_vote_count, q.down_vote_count,\n1542\t\t\t q.accepted_answer_id, q.created_at, q.updated_at,\n1543\t\t\t u.id, u.display_name, u.profile_image, u.reputation,\n1544\t\t\t COALESCE(array_agg(DISTINCT t.name) FILTER (WHERE t.name IS NOT NULL), '{}') as tags\n1545\t\t\tFROM questions q\n1546\t\t\tJOIN users u ON u.id = q.user_id\n1547\t\t\tLEFT JOIN question_tags qt ON qt.question_id = q.id\n1548\t\t\tLEFT JOIN tags t ON t.id = qt.tag_id\n1549\t\t\t%s\n1550\t\t\tGROUP BY q.id, u.id\n1551\t\t\tORDER BY %s\n1552\t\t\tLIMIT $%d OFFSET $%d`,\n1553\t\t\twhere, orderBy, argIdx, argIdx+1), listArgs...)\n1554\t\tif err != nil {\n1555\t\t\treturn nil, 0, fmt.Errorf(\"list questions query: %w\", err)\n1556\t\t}\n1557\t\tdefer rows.Close()\n1558\t\n1559\t\tvar questions []*Question\n1560\t\tfor rows.Next() {\n1561\t\t\tq := &Question{Owner: &User{}}\n1562\t\t\tif err := rows.Scan(\n1563\t\t\t\t&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n1564\t\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete,\n1565\t\t\t\t&q.ViewCount, &q.Score, &q.UpVoteCount, &q.DownVoteCount,\n1566\t\t\t\t&q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt,\n1567\t\t\t\t&q.Owner.ID, &q.Owner.DisplayName, &q.Owner.ProfileImage, &q.Owner.Reputation,\n1568\t\t\t\t&q.Tags,\n1569\t\t\t); err != nil {\n1570\t\t\t\treturn nil, 0, fmt.Errorf(\"scan question row: %w\", err)\n1571\t\t\t}\n1572\t\t\tquestions = append(questions, q)\n1573\t\t}\n1574\t\treturn questions, total, rows.Err()\n1575\t}\n1576\t\n1577\tfunc (p *Postgres) GetQuestion(ctx context.Context, id int) (*Question, error) {\n1578\t\tq := &Question{Owner: &User{}}\n1579\t\terr := p.db.QueryRow(ctx, `\n1580\t\t\tSELECT q.id, q.user_id, q.title, q.body_markdown, q.body_html,\n1581\t\t\t q.is_answered, q.is_deleted, q.is_obsolete,\n1582\t\t\t q.view_count, q.score, q.up_vote_count, q.down_vote_count,\n1583\t\t\t q.accepted_answer_id, q.created_at, q.updated_at,\n1584\t\t\t u.id, u.display_name, u.profile_image, u.reputation,\n1585\t\t\t COALESCE(array_agg(DISTINCT t.name) FILTER (WHERE t.name IS NOT NULL), '{}')\n1586\t\t\tFROM questions q\n1587\t\t\tJOIN users u ON u.id = q.user_id\n1588\t\t\tLEFT JOIN question_tags qt ON qt.question_id = q.id\n1589\t\t\tLEFT JOIN tags t ON t.id = qt.tag_id\n1590\t\t\tWHERE q.id = $1 AND q.is_deleted = FALSE\n1591\t\t\tGROUP BY q.id, u.id`, id).\n1592\t\t\tScan(&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n1593\t\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete,\n1594\t\t\t\t&q.ViewCount, &q.Score, &q.UpVoteCount, &q.DownVoteCount,\n1595\t\t\t\t&q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt,\n1596\t\t\t\t&q.Owner.ID, &q.Owner.DisplayName, &q.Owner.ProfileImage, &q.Owner.Reputation,\n1597\t\t\t\t&q.Tags)\n1598\t\tif err != nil {\n1599\t\t\treturn nil, fmt.Errorf(\"get question: %w\", err)\n1600\t\t}\n1601\t\treturn q, nil\n1602\t}\n1603\t\n1604\tfunc (p *Postgres) CreateQuestion(ctx context.Context, params CreateQuestionParams) (*Question, error) {\n1605\t\tvar q Question\n1606\t\terr := p.db.QueryRow(ctx, `\n1607\t\t\tINSERT INTO questions (user_id, title, body_markdown, body_html)\n1608\t\t\tVALUES ($1,$2,$3,$4)\n1609\t\t\tRETURNING id, user_id, title, body_markdown, body_html,\n1610\t\t\t is_answered, is_deleted, is_obsolete, view_count, score,\n1611\t\t\t up_vote_count, down_vote_count, accepted_answer_id, created_at, updated_at`,\n1612\t\t\tparams.UserID, params.Title, params.BodyMarkdown, params.BodyHTML).\n1613\t\t\tScan(&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n1614\t\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete, &q.ViewCount, &q.Score,\n1615\t\t\t\t&q.UpVoteCount, &q.DownVoteCount, &q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt)\n1616\t\tif err != nil {\n1617\t\t\treturn nil, fmt.Errorf(\"create question: %w\", err)\n1618\t\t}\n1619\t\tif err := p.setQuestionTags(ctx, q.ID, params.Tags); err != nil {\n1620\t\t\treturn nil, err\n1621\t\t}\n1622\t\tq.Tags = params.Tags\n1623\t\treturn &q, nil\n1624\t}\n1625\t\n1626\tfunc (p *Postgres) UpdateQuestion(ctx context.Context, params UpdateQuestionParams) (*Question, error) {\n1627\t\t_, err := p.db.Exec(ctx, `\n1628\t\t\tUPDATE questions SET title=$2, body_markdown=$3, body_html=$4, updated_at=NOW()\n1629\t\t\tWHERE id=$1`, params.ID, params.Title, params.BodyMarkdown, params.BodyHTML)\n1630\t\tif err != nil {\n1631\t\t\treturn nil, fmt.Errorf(\"update question: %w\", err)\n1632\t\t}\n1633\t\tif err := p.setQuestionTags(ctx, params.ID, params.Tags); err != nil {\n1634\t\t\treturn nil, err\n1635\t\t}\n1636\t\treturn p.GetQuestion(ctx, params.ID)\n1637\t}\n1638\t\n1639\tfunc (p *Postgres) DeleteQuestion(ctx context.Context, id int) error {\n1640\t\t_, err := p.db.Exec(ctx, `UPDATE questions SET is_deleted=TRUE, updated_at=NOW() WHERE id=$1`, id)\n1641\t\treturn err\n1642\t}\n1643\t\n1644\tfunc (p *Postgres) IncrementQuestionViewCount(ctx context.Context, id int) error {\n1645\t\t_, err := p.db.Exec(ctx, `UPDATE questions SET view_count=view_count+1 WHERE id=$1`, id)\n1646\t\treturn err\n1647\t}\n1648\t\n1649\tfunc (p *Postgres) UpsertQuestionFromImport(ctx context.Context, params UpsertQuestionParams) (*Question, error) {\n1650\t\tvar q Question\n1651\t\terr := p.db.QueryRow(ctx, `\n1652\t\t\tINSERT INTO questions (legacy_id, user_id, title, body_markdown, body_html,\n1653\t\t\t is_answered, is_deleted, is_obsolete, view_count, score,\n1654\t\t\t up_vote_count, down_vote_count, created_at, updated_at)\n1655\t\t\tSELECT $1, u.id, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14\n1656\t\t\tFROM users u WHERE u.legacy_id = $2\n1657\t\t\tON CONFLICT (legacy_id) WHERE legacy_id IS NOT NULL DO UPDATE SET\n1658\t\t\t title = EXCLUDED.title,\n1659\t\t\t body_markdown = EXCLUDED.body_markdown,\n1660\t\t\t body_html = EXCLUDED.body_html,\n1661\t\t\t is_answered = EXCLUDED.is_answered,\n1662\t\t\t is_deleted = EXCLUDED.is_deleted,\n1663\t\t\t is_obsolete = EXCLUDED.is_obsolete,\n1664\t\t\t view_count = EXCLUDED.view_count,\n1665\t\t\t score = EXCLUDED.score,\n1666\t\t\t up_vote_count = EXCLUDED.up_vote_count,\n1667\t\t\t down_vote_count = EXCLUDED.down_vote_count,\n1668\t\t\t updated_at = EXCLUDED.updated_at\n1669\t\t\tRETURNING id, user_id, title, body_markdown, body_html,\n1670\t\t\t is_answered, is_deleted, is_obsolete, view_count, score,\n1671\t\t\t up_vote_count, down_vote_count, accepted_answer_id, created_at, updated_at`,\n1672\t\t\tparams.LegacyID, params.UserLegacyID, params.Title, params.BodyMarkdown, params.BodyHTML,\n1673\t\t\tparams.IsAnswered, params.IsDeleted, params.IsObsolete, params.ViewCount, params.Score,\n1674\t\t\tparams.UpVoteCount, params.DownVoteCount, params.CreatedAt, params.UpdatedAt).\n1675\t\t\tScan(&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n1676\t\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete, &q.ViewCount, &q.Score,\n1677\t\t\t\t&q.UpVoteCount, &q.DownVoteCount, &q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt)\n1678\t\tif err != nil {\n1679\t\t\treturn nil, fmt.Errorf(\"upsert question: %w\", err)\n1680\t\t}\n1681\t\tif err := p.setQuestionTags(ctx, q.ID, params.Tags); err != nil {\n1682\t\t\treturn nil, err\n1683\t\t}\n1684\t\treturn &q, nil\n1685\t}\n1686\t\n1687\tfunc (p *Postgres) setQuestionTags(ctx context.Context, questionID int, tags []string) error {\n1688\t\tif _, err := p.db.Exec(ctx, `DELETE FROM question_tags WHERE question_id=$1`, questionID); err != nil {\n1689\t\t\treturn fmt.Errorf(\"clear question tags: %w\", err)\n1690\t\t}\n1691\t\tfor _, name := range tags {\n1692\t\t\tif _, err := p.db.Exec(ctx, `\n1693\t\t\t\tINSERT INTO question_tags (question_id, tag_id)\n1694\t\t\t\tSELECT $1, id FROM tags WHERE name=$2\n1695\t\t\t\tON CONFLICT DO NOTHING`, questionID, name); err != nil {\n1696\t\t\t\treturn fmt.Errorf(\"set question tag %q: %w\", name, err)\n1697\t\t\t}\n1698\t\t}\n1699\t\treturn nil\n1700\t}\n1701\t```\n1702\t\n1703\t- [ ] **Step 4: Run tests β expect PASS**\n1704\t\n1705\t```bash\n1706\tTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n1707\t go test -race ./internal/store/... -v\n1708\t```\n1709\t\n1710\tExpected: PASS\n1711\t\n1712\t- [ ] **Step 5: Commit**\n1713\t\n1714\t```bash\n1715\tgit add internal/store/questions.go internal/store/questions_test.go\n1716\tgit commit -m \"feat: question store with list, get, create, update, delete, import\"\n1717\t```\n1718\t\n1719\t---\n1720\t\n1721\t## Task 7: Store β Answers, Comments & Votes\n1722\t\n1723\t**Files:**\n1724\t- Create: `internal/store/answers.go`\n1725\t- Create: `internal/store/comments.go`\n1726\t- Create: `internal/store/votes.go`\n1727\t\n1728\t- [ ] **Step 1: Write `internal/store/answers.go`**\n1729\t\n1730\t```go\n1731\tpackage store\n1732\t\n1733\timport (\n1734\t\t\"context\"\n1735\t\t\"fmt\"\n1736\t)\n1737\t\n1738\tfunc (p *Postgres) ListAnswersByQuestion(ctx context.Context, questionID int) ([]*Answer, error) {\n1739\t\trows, err := p.db.Query(ctx, `\n1740\t\t\tSELECT a.id, a.question_id, a.user_id, a.body_markdown, a.body_html,\n1741\t\t\t a.is_accepted, a.score, a.up_vote_count, a.down_vote_count,\n1742\t\t\t a.created_at, a.updated_at,\n1743\t\t\t u.id, u.display_name, u.profile_image, u.reputation\n1744\t\t\tFROM answers a\n1745\t\t\tJOIN users u ON u.id = a.user_id\n1746\t\t\tWHERE a.question_id = $1\n1747\t\t\tORDER BY a.is_accepted DESC, a.score DESC, a.created_at ASC`, questionID)\n1748\t\tif err != nil {"}]},"uuid":"b1c2d96b-fe93-4eac-948f-f07b3315066d","timestamp":"2026-05-13T17:55:08.276Z","toolUseResult":{"type":"text","file":{"filePath":"/Users/steve.briggs/projects/heapoverflow/docs/superpowers/plans/2026-05-07-heapoverflow-backend.md","content":"## Task 5: Store β Users & Tags\n\n**Files:**\n- Create: `internal/store/testhelper_test.go`\n- Create: `internal/store/users.go`\n- Create: `internal/store/users_test.go`\n- Create: `internal/store/tags.go`\n\n- [ ] **Step 1: Write test helpers in `internal/store/testhelper_test.go`**\n\n```go\npackage store_test\n\nimport (\n\t\"context\"\n\t\"os\"\n\t\"testing\"\n\n\t\"github.com/immuta/heapoverflow/internal/store\"\n\t\"github.com/jackc/pgx/v5/pgxpool\"\n\t\"github.com/stretchr/testify/require\"\n)\n\nfunc testStore(t *testing.T) *store.Postgres {\n\tt.Helper()\n\turl := os.Getenv(\"TEST_DATABASE_URL\")\n\tif url == \"\" {\n\t\tt.Skip(\"TEST_DATABASE_URL not set β skipping integration test\")\n\t}\n\tpool, err := pgxpool.New(context.Background(), url)\n\trequire.NoError(t, err)\n\tt.Cleanup(pool.Close)\n\treturn store.New(pool)\n}\n```\n\n- [ ] **Step 2: Write failing test for user creation in `internal/store/users_test.go`**\n\n```go\npackage store_test\n\nimport (\n\t\"context\"\n\t\"testing\"\n\n\t\"github.com/immuta/heapoverflow/internal/store\"\n\t\"github.com/stretchr/testify/assert\"\n\t\"github.com/stretchr/testify/require\"\n)\n\nfunc TestCreateAndGetUser(t *testing.T) {\n\ts := testStore(t)\n\tctx := context.Background()\n\n\temail := ptr(\"testuser@example.com\")\n\tu, err := s.CreateUser(ctx, store.CreateUserParams{\n\t\tDisplayName: \"Test User\",\n\t\tEmail: email,\n\t})\n\trequire.NoError(t, err)\n\trequire.NotZero(t, u.ID)\n\tassert.Equal(t, \"Test User\", u.DisplayName)\n\n\tgot, err := s.GetUserByID(ctx, u.ID)\n\trequire.NoError(t, err)\n\tassert.Equal(t, u.ID, got.ID)\n\tassert.Equal(t, \"Test User\", got.DisplayName)\n\n\tt.Cleanup(func() {\n\t\t_, _ = s.DB().Exec(ctx, \"DELETE FROM users WHERE id = $1\", u.ID)\n\t})\n}\n\nfunc ptr[T any](v T) *T { return &v }\n```\n\n- [ ] **Step 3: Run test β expect FAIL (CreateUser not implemented)**\n\n```bash\nTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n go test -race ./internal/store/... -run TestCreateAndGetUser -v\n```\n\nExpected: compile error β `s.CreateUser` undefined, `s.DB()` undefined.\n\n- [ ] **Step 4: Write `internal/store/users.go`**\n\n```go\npackage store\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\t\"time\"\n\n\t\"github.com/jackc/pgx/v5\"\n\t\"github.com/jackc/pgx/v5/pgxpool\"\n)\n\n// DB exposes the underlying connection for test cleanup.\nfunc (p *Postgres) DB() DBTX { return p.db }\n\nfunc (p *Postgres) GetUserByID(ctx context.Context, id int) (*User, error) {\n\trow := p.db.QueryRow(ctx, `\n\t\tSELECT id, legacy_id, user_id, account_id, okta_id, display_name, email,\n\t\t profile_image, about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at\n\t\tFROM users WHERE id = $1`, id)\n\treturn scanUser(row)\n}\n\nfunc (p *Postgres) GetUserByOktaID(ctx context.Context, oktaID string) (*User, error) {\n\trow := p.db.QueryRow(ctx, `\n\t\tSELECT id, legacy_id, user_id, account_id, okta_id, display_name, email,\n\t\t profile_image, about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at\n\t\tFROM users WHERE okta_id = $1`, oktaID)\n\treturn scanUser(row)\n}\n\nfunc (p *Postgres) GetUserByEmail(ctx context.Context, email string) (*User, error) {\n\trow := p.db.QueryRow(ctx, `\n\t\tSELECT id, legacy_id, user_id, account_id, okta_id, display_name, email,\n\t\t profile_image, about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at\n\t\tFROM users WHERE email = $1`, email)\n\treturn scanUser(row)\n}\n\nfunc (p *Postgres) CreateUser(ctx context.Context, params CreateUserParams) (*User, error) {\n\trow := p.db.QueryRow(ctx, `\n\t\tINSERT INTO users (display_name, email, okta_id, profile_image)\n\t\tVALUES ($1, $2, $3, $4)\n\t\tRETURNING id, legacy_id, user_id, account_id, okta_id, display_name, email,\n\t\t profile_image, about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at`,\n\t\tparams.DisplayName, params.Email, params.OktaID, params.ProfileImage)\n\treturn scanUser(row)\n}\n\nfunc (p *Postgres) UpdateUser(ctx context.Context, params UpdateUserParams) (*User, error) {\n\trow := p.db.QueryRow(ctx, `\n\t\tUPDATE users SET display_name=$2, about_me=$3\n\t\tWHERE id=$1\n\t\tRETURNING id, legacy_id, user_id, account_id, okta_id, display_name, email,\n\t\t profile_image, about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at`,\n\t\tparams.ID, params.DisplayName, params.AboutMe)\n\treturn scanUser(row)\n}\n\nfunc (p *Postgres) UpsertUserFromImport(ctx context.Context, params UpsertUserParams) (*User, error) {\n\trow := p.db.QueryRow(ctx, `\n\t\tINSERT INTO users (legacy_id, user_id, account_id, display_name, email, profile_image,\n\t\t about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at)\n\t\tVALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14)\n\t\tON CONFLICT (legacy_id) WHERE legacy_id IS NOT NULL DO UPDATE SET\n\t\t display_name = EXCLUDED.display_name,\n\t\t email = EXCLUDED.email,\n\t\t profile_image = EXCLUDED.profile_image,\n\t\t about_me = EXCLUDED.about_me,\n\t\t reputation = EXCLUDED.reputation,\n\t\t badge_bronze = EXCLUDED.badge_bronze,\n\t\t badge_silver = EXCLUDED.badge_silver,\n\t\t badge_gold = EXCLUDED.badge_gold,\n\t\t is_employee = EXCLUDED.is_employee,\n\t\t last_access_at = EXCLUDED.last_access_at\n\t\tRETURNING id, legacy_id, user_id, account_id, okta_id, display_name, email,\n\t\t profile_image, about_me, reputation, badge_bronze, badge_silver, badge_gold,\n\t\t is_employee, created_at, last_access_at`,\n\t\tparams.LegacyID, params.UserID, params.AccountID, params.DisplayName,\n\t\tparams.Email, params.ProfileImage, params.AboutMe,\n\t\tparams.Reputation, params.BadgeBronze, params.BadgeSilver, params.BadgeGold,\n\t\tparams.IsEmployee, params.CreatedAt, params.LastAccessAt)\n\treturn scanUser(row)\n}\n\nfunc scanUser(row pgx.Row) (*User, error) {\n\tvar u User\n\terr := row.Scan(\n\t\t&u.ID, &u.LegacyID, &u.UserID, &u.AccountID, &u.OktaID,\n\t\t&u.DisplayName, &u.Email, &u.ProfileImage, &u.AboutMe,\n\t\t&u.Reputation, &u.BadgeBronze, &u.BadgeSilver, &u.BadgeGold,\n\t\t&u.IsEmployee, &u.CreatedAt, &u.LastAccessAt,\n\t)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"scan user: %w\", err)\n\t}\n\treturn &u, nil\n}\n```\n\n- [ ] **Step 5: Run test β expect PASS**\n\n```bash\nTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n go test -race ./internal/store/... -run TestCreateAndGetUser -v\n```\n\nExpected: PASS\n\n- [ ] **Step 6: Write `internal/store/tags.go`**\n\n```go\npackage store\n\nimport (\n\t\"context\"\n\t\"fmt\"\n)\n\nfunc (p *Postgres) ListTags(ctx context.Context, query string) ([]*Tag, error) {\n\tq := `\n\t\tSELECT t.id, t.legacy_id, t.name, t.description, t.count, t.is_moderator_only, t.is_required\n\t\tFROM tags t`\n\targs := []any{}\n\tif query != \"\" {\n\t\tq += ` WHERE t.name ILIKE '%' || $1 || '%'`\n\t\targs = append(args, query)\n\t}\n\tq += ` ORDER BY t.count DESC, t.name LIMIT 100`\n\n\trows, err := p.db.Query(ctx, q, args...)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"list tags: %w\", err)\n\t}\n\tdefer rows.Close()\n\n\tvar tags []*Tag\n\tfor rows.Next() {\n\t\tvar t Tag\n\t\tif err := rows.Scan(&t.ID, &t.LegacyID, &t.Name, &t.Description, &t.Count, &t.IsModeratorOnly, &t.IsRequired); err != nil {\n\t\t\treturn nil, fmt.Errorf(\"scan tag: %w\", err)\n\t\t}\n\t\ttags = append(tags, &t)\n\t}\n\treturn tags, rows.Err()\n}\n\nfunc (p *Postgres) GetTagByName(ctx context.Context, name string) (*Tag, error) {\n\tvar t Tag\n\terr := p.db.QueryRow(ctx, `\n\t\tSELECT id, legacy_id, name, description, count, is_moderator_only, is_required\n\t\tFROM tags WHERE name = $1`, name).\n\t\tScan(&t.ID, &t.LegacyID, &t.Name, &t.Description, &t.Count, &t.IsModeratorOnly, &t.IsRequired)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"get tag: %w\", err)\n\t}\n\n\t// Load synonyms\n\trows, err := p.db.Query(ctx, `SELECT synonym FROM tag_synonyms WHERE tag_id = $1`, t.ID)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tdefer rows.Close()\n\tfor rows.Next() {\n\t\tvar s string\n\t\tif err := rows.Scan(&s); err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\tt.Synonyms = append(t.Synonyms, s)\n\t}\n\n\t// Load SMEs\n\tsmeRows, err := p.db.Query(ctx, `\n\t\tSELECT u.id, u.display_name, u.profile_image, u.reputation\n\t\tFROM users u\n\t\tJOIN tag_smes ts ON ts.user_id = u.id\n\t\tWHERE ts.tag_id = $1`, t.ID)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\tdefer smeRows.Close()\n\tfor smeRows.Next() {\n\t\tvar u User\n\t\tif err := smeRows.Scan(&u.ID, &u.DisplayName, &u.ProfileImage, &u.Reputation); err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\tt.SMEs = append(t.SMEs, &u)\n\t}\n\n\treturn &t, nil\n}\n\nfunc (p *Postgres) UpsertTagFromImport(ctx context.Context, params UpsertTagParams) (*Tag, error) {\n\tvar t Tag\n\terr := p.db.QueryRow(ctx, `\n\t\tINSERT INTO tags (legacy_id, name, description, count, is_moderator_only, is_required)\n\t\tVALUES ($1,$2,$3,$4,$5,$6)\n\t\tON CONFLICT (name) DO UPDATE SET\n\t\t legacy_id = EXCLUDED.legacy_id,\n\t\t description = EXCLUDED.description,\n\t\t count = EXCLUDED.count,\n\t\t is_moderator_only = EXCLUDED.is_moderator_only,\n\t\t is_required = EXCLUDED.is_required\n\t\tRETURNING id, legacy_id, name, description, count, is_moderator_only, is_required`,\n\t\tparams.LegacyID, params.Name, params.Description, params.Count,\n\t\tparams.IsModeratorOnly, params.IsRequired).\n\t\tScan(&t.ID, &t.LegacyID, &t.Name, &t.Description, &t.Count, &t.IsModeratorOnly, &t.IsRequired)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"upsert tag: %w\", err)\n\t}\n\n\t// Upsert synonyms\n\tfor _, syn := range params.Synonyms {\n\t\t_, err := p.db.Exec(ctx, `\n\t\t\tINSERT INTO tag_synonyms (tag_id, synonym) VALUES ($1,$2)\n\t\t\tON CONFLICT (tag_id, synonym) DO NOTHING`, t.ID, syn)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"upsert synonym: %w\", err)\n\t\t}\n\t}\n\n\t// Upsert SMEs by legacy user_id\n\tfor _, legacyUID := range params.SMELegacyIDs {\n\t\t_, err := p.db.Exec(ctx, `\n\t\t\tINSERT INTO tag_smes (tag_id, user_id)\n\t\t\tSELECT $1, id FROM users WHERE legacy_id = $2\n\t\t\tON CONFLICT DO NOTHING`, t.ID, legacyUID)\n\t\tif err != nil {\n\t\t\treturn nil, fmt.Errorf(\"upsert tag sme: %w\", err)\n\t\t}\n\t}\n\n\treturn &t, nil\n}\n```\n\n- [ ] **Step 7: Run all store tests**\n\n```bash\nTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n go test -race ./internal/store/... -v\n```\n\nExpected: PASS\n\n- [ ] **Step 8: Commit**\n\n```bash\ngit add internal/store/\ngit commit -m \"feat: user and tag store implementations with integration tests\"\n```\n\n---\n\n## Task 6: Store β Questions\n\n**Files:**\n- Create: `internal/store/questions.go`\n- Create: `internal/store/questions_test.go`\n\n- [ ] **Step 1: Write failing test in `internal/store/questions_test.go`**\n\n```go\npackage store_test\n\nimport (\n\t\"context\"\n\t\"testing\"\n\t\"time\"\n\n\t\"github.com/immuta/heapoverflow/internal/store\"\n\t\"github.com/stretchr/testify/assert\"\n\t\"github.com/stretchr/testify/require\"\n)\n\nfunc TestCreateAndGetQuestion(t *testing.T) {\n\ts := testStore(t)\n\tctx := context.Background()\n\n\t// Need a user first\n\tu, err := s.CreateUser(ctx, store.CreateUserParams{DisplayName: \"Q Author\"})\n\trequire.NoError(t, err)\n\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM users WHERE id=$1\", u.ID) })\n\n\tq, err := s.CreateQuestion(ctx, store.CreateQuestionParams{\n\t\tUserID: u.ID,\n\t\tTitle: \"How does X work?\",\n\t\tBodyMarkdown: \"I want to know about X.\",\n\t\tBodyHTML: \"I want to know about X.
\",\n\t\tTags: []string{},\n\t})\n\trequire.NoError(t, err)\n\trequire.NotZero(t, q.ID)\n\tassert.Equal(t, \"How does X work?\", q.Title)\n\tassert.Equal(t, u.ID, q.UserID)\n\n\tgot, err := s.GetQuestion(ctx, q.ID)\n\trequire.NoError(t, err)\n\tassert.Equal(t, q.ID, got.ID)\n\tassert.Equal(t, \"How does X work?\", got.Title)\n}\n\nfunc TestListQuestions_Pagination(t *testing.T) {\n\ts := testStore(t)\n\tctx := context.Background()\n\n\tu, err := s.CreateUser(ctx, store.CreateUserParams{DisplayName: \"List Author\"})\n\trequire.NoError(t, err)\n\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM users WHERE id=$1\", u.ID) })\n\n\tfor i := 0; i < 3; i++ {\n\t\tq, err := s.CreateQuestion(ctx, store.CreateQuestionParams{\n\t\t\tUserID: u.ID, Title: \"Question\", BodyMarkdown: \"body\", BodyHTML: \"body
\",\n\t\t})\n\t\trequire.NoError(t, err)\n\t\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM questions WHERE id=$1\", q.ID) })\n\t}\n\n\tquestions, total, err := s.ListQuestions(ctx, store.ListQuestionsParams{Page: 1, PerPage: 2, Sort: \"newest\"})\n\trequire.NoError(t, err)\n\tassert.GreaterOrEqual(t, total, 3)\n\tassert.LessOrEqual(t, len(questions), 2)\n}\n```\n\n- [ ] **Step 2: Run test β expect compile error**\n\n```bash\nTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n go test -race ./internal/store/... -run TestCreateAndGetQuestion -v\n```\n\nExpected: compile error β `CreateQuestion` undefined.\n\n- [ ] **Step 3: Write `internal/store/questions.go`**\n\n```go\npackage store\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\t\"strings\"\n)\n\nfunc (p *Postgres) ListQuestions(ctx context.Context, params ListQuestionsParams) ([]*Question, int, error) {\n\tif params.PerPage <= 0 {\n\t\tparams.PerPage = 20\n\t}\n\tif params.Page <= 0 {\n\t\tparams.Page = 1\n\t}\n\toffset := (params.Page - 1) * params.PerPage\n\n\torderBy := \"q.created_at DESC\"\n\tswitch params.Sort {\n\tcase \"active\":\n\t\torderBy = \"q.updated_at DESC\"\n\tcase \"votes\":\n\t\torderBy = \"q.score DESC, q.created_at DESC\"\n\tcase \"unanswered\":\n\t\torderBy = \"q.created_at DESC\"\n\t}\n\n\tconditions := []string{\"q.is_deleted = FALSE\"}\n\targs := []any{}\n\targIdx := 1\n\n\tif params.Sort == \"unanswered\" {\n\t\tconditions = append(conditions, \"q.is_answered = FALSE\")\n\t}\n\tif params.Tag != \"\" {\n\t\tconditions = append(conditions, fmt.Sprintf(`\n\t\t\tEXISTS (SELECT 1 FROM question_tags qt JOIN tags t ON t.id=qt.tag_id\n\t\t\t WHERE qt.question_id=q.id AND t.name=$%d)`, argIdx))\n\t\targs = append(args, params.Tag)\n\t\targIdx++\n\t}\n\tif params.Query != \"\" {\n\t\tconditions = append(conditions, fmt.Sprintf(\"q.search_vector @@ plainto_tsquery('english', $%d)\", argIdx))\n\t\targs = append(args, params.Query)\n\t\targIdx++\n\t}\n\n\twhere := \"WHERE \" + strings.Join(conditions, \" AND \")\n\n\tvar total int\n\tcountArgs := make([]any, len(args))\n\tcopy(countArgs, args)\n\terr := p.db.QueryRow(ctx,\n\t\tfmt.Sprintf(\"SELECT COUNT(*) FROM questions q %s\", where), countArgs...).Scan(&total)\n\tif err != nil {\n\t\treturn nil, 0, fmt.Errorf(\"count questions: %w\", err)\n\t}\n\n\tlistArgs := append(args, params.PerPage, offset)\n\trows, err := p.db.Query(ctx, fmt.Sprintf(`\n\t\tSELECT q.id, q.user_id, q.title, q.body_markdown, q.body_html,\n\t\t q.is_answered, q.is_deleted, q.is_obsolete,\n\t\t q.view_count, q.score, q.up_vote_count, q.down_vote_count,\n\t\t q.accepted_answer_id, q.created_at, q.updated_at,\n\t\t u.id, u.display_name, u.profile_image, u.reputation,\n\t\t COALESCE(array_agg(DISTINCT t.name) FILTER (WHERE t.name IS NOT NULL), '{}') as tags\n\t\tFROM questions q\n\t\tJOIN users u ON u.id = q.user_id\n\t\tLEFT JOIN question_tags qt ON qt.question_id = q.id\n\t\tLEFT JOIN tags t ON t.id = qt.tag_id\n\t\t%s\n\t\tGROUP BY q.id, u.id\n\t\tORDER BY %s\n\t\tLIMIT $%d OFFSET $%d`,\n\t\twhere, orderBy, argIdx, argIdx+1), listArgs...)\n\tif err != nil {\n\t\treturn nil, 0, fmt.Errorf(\"list questions query: %w\", err)\n\t}\n\tdefer rows.Close()\n\n\tvar questions []*Question\n\tfor rows.Next() {\n\t\tq := &Question{Owner: &User{}}\n\t\tif err := rows.Scan(\n\t\t\t&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete,\n\t\t\t&q.ViewCount, &q.Score, &q.UpVoteCount, &q.DownVoteCount,\n\t\t\t&q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt,\n\t\t\t&q.Owner.ID, &q.Owner.DisplayName, &q.Owner.ProfileImage, &q.Owner.Reputation,\n\t\t\t&q.Tags,\n\t\t); err != nil {\n\t\t\treturn nil, 0, fmt.Errorf(\"scan question row: %w\", err)\n\t\t}\n\t\tquestions = append(questions, q)\n\t}\n\treturn questions, total, rows.Err()\n}\n\nfunc (p *Postgres) GetQuestion(ctx context.Context, id int) (*Question, error) {\n\tq := &Question{Owner: &User{}}\n\terr := p.db.QueryRow(ctx, `\n\t\tSELECT q.id, q.user_id, q.title, q.body_markdown, q.body_html,\n\t\t q.is_answered, q.is_deleted, q.is_obsolete,\n\t\t q.view_count, q.score, q.up_vote_count, q.down_vote_count,\n\t\t q.accepted_answer_id, q.created_at, q.updated_at,\n\t\t u.id, u.display_name, u.profile_image, u.reputation,\n\t\t COALESCE(array_agg(DISTINCT t.name) FILTER (WHERE t.name IS NOT NULL), '{}')\n\t\tFROM questions q\n\t\tJOIN users u ON u.id = q.user_id\n\t\tLEFT JOIN question_tags qt ON qt.question_id = q.id\n\t\tLEFT JOIN tags t ON t.id = qt.tag_id\n\t\tWHERE q.id = $1 AND q.is_deleted = FALSE\n\t\tGROUP BY q.id, u.id`, id).\n\t\tScan(&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete,\n\t\t\t&q.ViewCount, &q.Score, &q.UpVoteCount, &q.DownVoteCount,\n\t\t\t&q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt,\n\t\t\t&q.Owner.ID, &q.Owner.DisplayName, &q.Owner.ProfileImage, &q.Owner.Reputation,\n\t\t\t&q.Tags)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"get question: %w\", err)\n\t}\n\treturn q, nil\n}\n\nfunc (p *Postgres) CreateQuestion(ctx context.Context, params CreateQuestionParams) (*Question, error) {\n\tvar q Question\n\terr := p.db.QueryRow(ctx, `\n\t\tINSERT INTO questions (user_id, title, body_markdown, body_html)\n\t\tVALUES ($1,$2,$3,$4)\n\t\tRETURNING id, user_id, title, body_markdown, body_html,\n\t\t is_answered, is_deleted, is_obsolete, view_count, score,\n\t\t up_vote_count, down_vote_count, accepted_answer_id, created_at, updated_at`,\n\t\tparams.UserID, params.Title, params.BodyMarkdown, params.BodyHTML).\n\t\tScan(&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete, &q.ViewCount, &q.Score,\n\t\t\t&q.UpVoteCount, &q.DownVoteCount, &q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"create question: %w\", err)\n\t}\n\tif err := p.setQuestionTags(ctx, q.ID, params.Tags); err != nil {\n\t\treturn nil, err\n\t}\n\tq.Tags = params.Tags\n\treturn &q, nil\n}\n\nfunc (p *Postgres) UpdateQuestion(ctx context.Context, params UpdateQuestionParams) (*Question, error) {\n\t_, err := p.db.Exec(ctx, `\n\t\tUPDATE questions SET title=$2, body_markdown=$3, body_html=$4, updated_at=NOW()\n\t\tWHERE id=$1`, params.ID, params.Title, params.BodyMarkdown, params.BodyHTML)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"update question: %w\", err)\n\t}\n\tif err := p.setQuestionTags(ctx, params.ID, params.Tags); err != nil {\n\t\treturn nil, err\n\t}\n\treturn p.GetQuestion(ctx, params.ID)\n}\n\nfunc (p *Postgres) DeleteQuestion(ctx context.Context, id int) error {\n\t_, err := p.db.Exec(ctx, `UPDATE questions SET is_deleted=TRUE, updated_at=NOW() WHERE id=$1`, id)\n\treturn err\n}\n\nfunc (p *Postgres) IncrementQuestionViewCount(ctx context.Context, id int) error {\n\t_, err := p.db.Exec(ctx, `UPDATE questions SET view_count=view_count+1 WHERE id=$1`, id)\n\treturn err\n}\n\nfunc (p *Postgres) UpsertQuestionFromImport(ctx context.Context, params UpsertQuestionParams) (*Question, error) {\n\tvar q Question\n\terr := p.db.QueryRow(ctx, `\n\t\tINSERT INTO questions (legacy_id, user_id, title, body_markdown, body_html,\n\t\t is_answered, is_deleted, is_obsolete, view_count, score,\n\t\t up_vote_count, down_vote_count, created_at, updated_at)\n\t\tSELECT $1, u.id, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14\n\t\tFROM users u WHERE u.legacy_id = $2\n\t\tON CONFLICT (legacy_id) WHERE legacy_id IS NOT NULL DO UPDATE SET\n\t\t title = EXCLUDED.title,\n\t\t body_markdown = EXCLUDED.body_markdown,\n\t\t body_html = EXCLUDED.body_html,\n\t\t is_answered = EXCLUDED.is_answered,\n\t\t is_deleted = EXCLUDED.is_deleted,\n\t\t is_obsolete = EXCLUDED.is_obsolete,\n\t\t view_count = EXCLUDED.view_count,\n\t\t score = EXCLUDED.score,\n\t\t up_vote_count = EXCLUDED.up_vote_count,\n\t\t down_vote_count = EXCLUDED.down_vote_count,\n\t\t updated_at = EXCLUDED.updated_at\n\t\tRETURNING id, user_id, title, body_markdown, body_html,\n\t\t is_answered, is_deleted, is_obsolete, view_count, score,\n\t\t up_vote_count, down_vote_count, accepted_answer_id, created_at, updated_at`,\n\t\tparams.LegacyID, params.UserLegacyID, params.Title, params.BodyMarkdown, params.BodyHTML,\n\t\tparams.IsAnswered, params.IsDeleted, params.IsObsolete, params.ViewCount, params.Score,\n\t\tparams.UpVoteCount, params.DownVoteCount, params.CreatedAt, params.UpdatedAt).\n\t\tScan(&q.ID, &q.UserID, &q.Title, &q.BodyMarkdown, &q.BodyHTML,\n\t\t\t&q.IsAnswered, &q.IsDeleted, &q.IsObsolete, &q.ViewCount, &q.Score,\n\t\t\t&q.UpVoteCount, &q.DownVoteCount, &q.AcceptedAnswerID, &q.CreatedAt, &q.UpdatedAt)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"upsert question: %w\", err)\n\t}\n\tif err := p.setQuestionTags(ctx, q.ID, params.Tags); err != nil {\n\t\treturn nil, err\n\t}\n\treturn &q, nil\n}\n\nfunc (p *Postgres) setQuestionTags(ctx context.Context, questionID int, tags []string) error {\n\tif _, err := p.db.Exec(ctx, `DELETE FROM question_tags WHERE question_id=$1`, questionID); err != nil {\n\t\treturn fmt.Errorf(\"clear question tags: %w\", err)\n\t}\n\tfor _, name := range tags {\n\t\tif _, err := p.db.Exec(ctx, `\n\t\t\tINSERT INTO question_tags (question_id, tag_id)\n\t\t\tSELECT $1, id FROM tags WHERE name=$2\n\t\t\tON CONFLICT DO NOTHING`, questionID, name); err != nil {\n\t\t\treturn fmt.Errorf(\"set question tag %q: %w\", name, err)\n\t\t}\n\t}\n\treturn nil\n}\n```\n\n- [ ] **Step 4: Run tests β expect PASS**\n\n```bash\nTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n go test -race ./internal/store/... -v\n```\n\nExpected: PASS\n\n- [ ] **Step 5: Commit**\n\n```bash\ngit add internal/store/questions.go internal/store/questions_test.go\ngit commit -m \"feat: question store with list, get, create, update, delete, import\"\n```\n\n---\n\n## Task 7: Store β Answers, Comments & Votes\n\n**Files:**\n- Create: `internal/store/answers.go`\n- Create: `internal/store/comments.go`\n- Create: `internal/store/votes.go`\n\n- [ ] **Step 1: Write `internal/store/answers.go`**\n\n```go\npackage store\n\nimport (\n\t\"context\"\n\t\"fmt\"\n)\n\nfunc (p *Postgres) ListAnswersByQuestion(ctx context.Context, questionID int) ([]*Answer, error) {\n\trows, err := p.db.Query(ctx, `\n\t\tSELECT a.id, a.question_id, a.user_id, a.body_markdown, a.body_html,\n\t\t a.is_accepted, a.score, a.up_vote_count, a.down_vote_count,\n\t\t a.created_at, a.updated_at,\n\t\t u.id, u.display_name, u.profile_image, u.reputation\n\t\tFROM answers a\n\t\tJOIN users u ON u.id = a.user_id\n\t\tWHERE a.question_id = $1\n\t\tORDER BY a.is_accepted DESC, a.score DESC, a.created_at ASC`, questionID)\n\tif err != nil 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{"parentUuid":"0604844d-c9c8-4074-ab7c-9e53bc9fb416","isSidechain":false,"message":{"model":"claude-opus-4-7","id":"msg_01WyWEW1Wj1ucM8fXxkaZ59x","type":"message","role":"assistant","content":[{"type":"text","text":"Hold up β I peep a bug in the migrations. The plan uses `UNIQUE NULLS NOT DISTINCT (legacy_id)` but the spec needs many NULLs allowed (newly-created records always have NULL legacy_id). `NULLS NOT DISTINCT` means only ONE null permitted. Also `ON CONFLICT (legacy_id) WHERE legacy_id IS NOT NULL` needs a partial unique index, not a constraint. 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Committing the migration fix."}],"stop_reason":"tool_use","stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":685,"cache_read_input_tokens":125058,"output_tokens":752,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":685,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[{"input_tokens":1,"output_tokens":752,"cache_read_input_tokens":125058,"cache_creation_input_tokens":685,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":685},"type":"message"}],"speed":"standard"},"diagnostics":null},"requestId":"req_011CazzuzHwVCQjSpmjPuW2c","type":"assistant","uuid":"9b2543aa-23c3-42ff-aa84-8d8f73fec5cc","timestamp":"2026-05-13T17:56:33.851Z","userType":"external","entrypoint":"cli","cwd":"/Users/steve.briggs/projects/heapoverflow","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262","version":"2.1.140","gitBranch":"HEAD"} {"parentUuid":"9b2543aa-23c3-42ff-aa84-8d8f73fec5cc","isSidechain":false,"message":{"model":"claude-opus-4-7","id":"msg_01AtUYcyCnFqJFMpaXS5B8sF","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01SPyrrfKydJnYjGBitPhRtA","name":"Bash","input":{"command":"git add migrations/000001_initial_schema.up.sql && git commit -m \"fix: use partial unique indexes for nullable legacy_id (multiple new users vibe check)\n\nOriginal UNIQUE NULLS NOT DISTINCT only allows one NULL row, but\nthe spec requires multiple new users/questions/etc to have NULL\nlegacy_id (only import-sourced rows get a legacy_id). 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\",\n\t\tTags: []string{},\n\t})\n\trequire.NoError(t, err)\n\trequire.NotZero(t, q.ID)\n\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM questions WHERE id=$1\", q.ID) })\n\n\tassert.Equal(t, \"How does X work?\", q.Title)\n\tassert.Equal(t, u.ID, q.UserID)\n\n\tgot, err := s.GetQuestion(ctx, q.ID)\n\trequire.NoError(t, err)\n\tassert.Equal(t, q.ID, got.ID)\n\tassert.Equal(t, \"How does X work?\", got.Title)\n}\n\nfunc TestListQuestions_Pagination(t *testing.T) {\n\ts := testStore(t)\n\tctx := context.Background()\n\n\tu, err := s.CreateUser(ctx, store.CreateUserParams{DisplayName: \"List Author\"})\n\trequire.NoError(t, err)\n\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM users WHERE id=$1\", u.ID) })\n\n\tfor i := 0; i < 3; i++ {\n\t\tq, err := s.CreateQuestion(ctx, store.CreateQuestionParams{\n\t\t\tUserID: u.ID, Title: \"Question\", BodyMarkdown: \"body\", BodyHTML: \"body
\",\n\t\t})\n\t\trequire.NoError(t, err)\n\t\tt.Cleanup(func() { s.DB().Exec(ctx, \"DELETE FROM questions WHERE id=$1\", q.ID) })\n\t}\n\n\tquestions, total, err := s.ListQuestions(ctx, store.ListQuestionsParams{Page: 1, PerPage: 2, Sort: \"newest\"})\n\trequire.NoError(t, err)\n\tassert.GreaterOrEqual(t, total, 3)\n\tassert.LessOrEqual(t, len(questions), 2)\n}\n","structuredPatch":[],"originalFile":null,"userModified":false},"sourceToolAssistantUUID":"ed982a58-a3b4-4dfb-8a0d-5c26d3c13f08","userType":"external","entrypoint":"cli","cwd":"/Users/steve.briggs/projects/heapoverflow","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262","version":"2.1.140","gitBranch":"HEAD"} {"parentUuid":"87ed1cfe-f902-44b2-9077-c88700e93feb","isSidechain":false,"attachment":{"type":"hook_success","hookName":"PostToolUse:Write","toolUseID":"toolu_01Y9mrCkHBQ3RUctraFeEFR6","hookEvent":"PostToolUse","content":"","stdout":"{\"continue\":true}\n","stderr":"","exitCode":0,"command":"node \"${CLAUDE_PLUGIN_ROOT}/dist/hooks/post-tool-use.js\"","durationMs":682},"type":"attachment","uuid":"ce301ed5-7460-44db-9cac-5e49a1f22a65","timestamp":"2026-05-13T17:59:15.989Z","userType":"external","entrypoint":"cli","cwd":"/Users/steve.briggs/projects/heapoverflow","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262","version":"2.1.140","gitBranch":"HEAD"} {"type":"last-prompt","lastPrompt":"lets make it lit fam","leafUuid":"ce301ed5-7460-44db-9cac-5e49a1f22a65","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262"} {"type":"ai-title","aiTitle":"Continue previous project","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262"} {"type":"permission-mode","permissionMode":"acceptEdits","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262"} {"parentUuid":"94db9905-076a-4103-9e62-2eed7ebb4bd3","isSidechain":false,"promptId":"08175a93-6e3b-4e68-8ca5-a22f144b8712","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01CJAnEtC9hRiiFqcQp7woD6","type":"tool_result","content":"ok \tgithub.com/immuta/heapoverflow/internal/store\t1.820s","is_error":false}]},"uuid":"b05ff4d8-6783-4dc8-bcf2-5addad6d1560","timestamp":"2026-05-13T17:59:25.652Z","toolUseResult":{"stdout":"ok \tgithub.com/immuta/heapoverflow/internal/store\t1.820s","stderr":"","interrupted":false,"isImage":false,"noOutputExpected":false},"sourceToolAssistantUUID":"94db9905-076a-4103-9e62-2eed7ebb4bd3","userType":"external","entrypoint":"cli","cwd":"/Users/steve.briggs/projects/heapoverflow","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262","version":"2.1.140","gitBranch":"HEAD"} {"parentUuid":"b05ff4d8-6783-4dc8-bcf2-5addad6d1560","isSidechain":false,"attachment":{"type":"hook_success","hookName":"PostToolUse:Bash","toolUseID":"toolu_01CJAnEtC9hRiiFqcQp7woD6","hookEvent":"PostToolUse","content":"","stdout":"{\"continue\":true}\n","stderr":"","exitCode":0,"command":"node \"${CLAUDE_PLUGIN_ROOT}/dist/hooks/post-tool-use.js\"","durationMs":610},"type":"attachment","uuid":"7ca2ca18-3686-407e-b3f5-2c870415050a","timestamp":"2026-05-13T17:59:25.651Z","userType":"external","entrypoint":"cli","cwd":"/Users/steve.briggs/projects/heapoverflow","sessionId":"e6214a80-a972-4ce0-bc68-5e99ecd04262","version":"2.1.140","gitBranch":"HEAD"} {"parentUuid":"7ca2ca18-3686-407e-b3f5-2c870415050a","isSidechain":false,"message":{"model":"claude-opus-4-7","id":"msg_01U5bVukCemeUNH4KbY57KG5","type":"message","role":"assistant","content":[{"type":"text","text":"Questions store passes. 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{"parentUuid":"63b1f8f3-d4c0-420b-9234-88c79cf64949","isSidechain":false,"promptId":"08175a93-6e3b-4e68-8ca5-a22f144b8712","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_017tNmXXqP2MgTp34XQafBp4","type":"tool_result","content":"1721\t## Task 7: Store β Answers, Comments & Votes\n1722\t\n1723\t**Files:**\n1724\t- Create: `internal/store/answers.go`\n1725\t- Create: `internal/store/comments.go`\n1726\t- Create: `internal/store/votes.go`\n1727\t\n1728\t- [ ] **Step 1: Write `internal/store/answers.go`**\n1729\t\n1730\t```go\n1731\tpackage store\n1732\t\n1733\timport (\n1734\t\t\"context\"\n1735\t\t\"fmt\"\n1736\t)\n1737\t\n1738\tfunc (p *Postgres) ListAnswersByQuestion(ctx context.Context, questionID int) ([]*Answer, error) {\n1739\t\trows, err := p.db.Query(ctx, `\n1740\t\t\tSELECT a.id, a.question_id, a.user_id, a.body_markdown, a.body_html,\n1741\t\t\t a.is_accepted, a.score, a.up_vote_count, a.down_vote_count,\n1742\t\t\t a.created_at, a.updated_at,\n1743\t\t\t u.id, u.display_name, u.profile_image, u.reputation\n1744\t\t\tFROM answers a\n1745\t\t\tJOIN users u ON u.id = a.user_id\n1746\t\t\tWHERE a.question_id = $1\n1747\t\t\tORDER BY a.is_accepted DESC, a.score DESC, a.created_at ASC`, questionID)\n1748\t\tif err != nil {\n1749\t\t\treturn nil, fmt.Errorf(\"list answers: %w\", err)\n1750\t\t}\n1751\t\tdefer rows.Close()\n1752\t\n1753\t\tvar answers []*Answer\n1754\t\tfor rows.Next() {\n1755\t\t\ta := &Answer{Owner: &User{}}\n1756\t\t\tif err := rows.Scan(\n1757\t\t\t\t&a.ID, &a.QuestionID, &a.UserID, &a.BodyMarkdown, &a.BodyHTML,\n1758\t\t\t\t&a.IsAccepted, &a.Score, &a.UpVoteCount, &a.DownVoteCount,\n1759\t\t\t\t&a.CreatedAt, &a.UpdatedAt,\n1760\t\t\t\t&a.Owner.ID, &a.Owner.DisplayName, &a.Owner.ProfileImage, &a.Owner.Reputation,\n1761\t\t\t); err != nil {\n1762\t\t\t\treturn nil, fmt.Errorf(\"scan answer: %w\", err)\n1763\t\t\t}\n1764\t\t\tanswers = append(answers, a)\n1765\t\t}\n1766\t\treturn answers, rows.Err()\n1767\t}\n1768\t\n1769\tfunc (p *Postgres) GetAnswer(ctx context.Context, id int) (*Answer, error) {\n1770\t\ta := &Answer{Owner: &User{}}\n1771\t\terr := p.db.QueryRow(ctx, `\n1772\t\t\tSELECT a.id, a.question_id, a.user_id, a.body_markdown, a.body_html,\n1773\t\t\t a.is_accepted, a.score, a.up_vote_count, a.down_vote_count,\n1774\t\t\t a.created_at, a.updated_at,\n1775\t\t\t u.id, u.display_name, u.profile_image, u.reputation\n1776\t\t\tFROM answers a JOIN users u ON u.id=a.user_id\n1777\t\t\tWHERE a.id = $1`, id).\n1778\t\t\tScan(&a.ID, &a.QuestionID, &a.UserID, &a.BodyMarkdown, &a.BodyHTML,\n1779\t\t\t\t&a.IsAccepted, &a.Score, &a.UpVoteCount, &a.DownVoteCount,\n1780\t\t\t\t&a.CreatedAt, &a.UpdatedAt,\n1781\t\t\t\t&a.Owner.ID, &a.Owner.DisplayName, &a.Owner.ProfileImage, &a.Owner.Reputation)\n1782\t\tif err != nil {\n1783\t\t\treturn nil, fmt.Errorf(\"get answer: %w\", err)\n1784\t\t}\n1785\t\treturn a, nil\n1786\t}\n1787\t\n1788\tfunc (p *Postgres) CreateAnswer(ctx context.Context, params CreateAnswerParams) (*Answer, error) {\n1789\t\tvar a Answer\n1790\t\terr := p.db.QueryRow(ctx, `\n1791\t\t\tINSERT INTO answers (question_id, user_id, body_markdown, body_html)\n1792\t\t\tVALUES ($1,$2,$3,$4)\n1793\t\t\tRETURNING id, question_id, user_id, body_markdown, body_html,\n1794\t\t\t is_accepted, score, up_vote_count, down_vote_count, created_at, updated_at`,\n1795\t\t\tparams.QuestionID, params.UserID, params.BodyMarkdown, params.BodyHTML).\n1796\t\t\tScan(&a.ID, &a.QuestionID, &a.UserID, &a.BodyMarkdown, &a.BodyHTML,\n1797\t\t\t\t&a.IsAccepted, &a.Score, &a.UpVoteCount, &a.DownVoteCount, &a.CreatedAt, &a.UpdatedAt)\n1798\t\tif err != nil {\n1799\t\t\treturn nil, fmt.Errorf(\"create answer: %w\", err)\n1800\t\t}\n1801\t\t// Mark question as having answers\n1802\t\t_, _ = p.db.Exec(ctx, `UPDATE questions SET is_answered=TRUE, updated_at=NOW() WHERE id=$1`, params.QuestionID)\n1803\t\treturn &a, nil\n1804\t}\n1805\t\n1806\tfunc (p *Postgres) UpdateAnswer(ctx context.Context, params UpdateAnswerParams) (*Answer, error) {\n1807\t\t_, err := p.db.Exec(ctx, `\n1808\t\t\tUPDATE answers SET body_markdown=$2, body_html=$3, updated_at=NOW() WHERE id=$1`,\n1809\t\t\tparams.ID, params.BodyMarkdown, params.BodyHTML)\n1810\t\tif err != nil {\n1811\t\t\treturn nil, fmt.Errorf(\"update answer: %w\", err)\n1812\t\t}\n1813\t\treturn p.GetAnswer(ctx, params.ID)\n1814\t}\n1815\t\n1816\tfunc (p *Postgres) DeleteAnswer(ctx context.Context, id int) error {\n1817\t\t_, err := p.db.Exec(ctx, `DELETE FROM answers WHERE id=$1`, id)\n1818\t\treturn err\n1819\t}\n1820\t\n1821\tfunc (p *Postgres) AcceptAnswer(ctx context.Context, answerID, questionID int) error {\n1822\t\t// Unaccept any existing accepted answer, then accept new one\n1823\t\t_, err := p.db.Exec(ctx, `UPDATE answers SET is_accepted=FALSE WHERE question_id=$1`, questionID)\n1824\t\tif err != nil {\n1825\t\t\treturn err\n1826\t\t}\n1827\t\t_, err = p.db.Exec(ctx, `UPDATE answers SET is_accepted=TRUE WHERE id=$1`, answerID)\n1828\t\tif err != nil {\n1829\t\t\treturn err\n1830\t\t}\n1831\t\t_, err = p.db.Exec(ctx, `\n1832\t\t\tUPDATE questions SET accepted_answer_id=$1, is_answered=TRUE, updated_at=NOW()\n1833\t\t\tWHERE id=$2`, answerID, questionID)\n1834\t\treturn err\n1835\t}\n1836\t\n1837\tfunc (p *Postgres) UpsertAnswerFromImport(ctx context.Context, params UpsertAnswerParams) (*Answer, error) {\n1838\t\tvar a Answer\n1839\t\terr := p.db.QueryRow(ctx, `\n1840\t\t\tINSERT INTO answers (legacy_id, question_id, user_id, body_markdown, body_html,\n1841\t\t\t is_accepted, score, up_vote_count, down_vote_count, created_at, updated_at)\n1842\t\t\tSELECT $1,\n1843\t\t\t (SELECT id FROM questions WHERE legacy_id=$2),\n1844\t\t\t (SELECT id FROM users WHERE legacy_id=$3),\n1845\t\t\t $4,$5,$6,$7,$8,$9,$10,$11\n1846\t\t\tON CONFLICT (legacy_id) WHERE legacy_id IS NOT NULL DO UPDATE SET\n1847\t\t\t body_markdown = EXCLUDED.body_markdown,\n1848\t\t\t body_html = EXCLUDED.body_html,\n1849\t\t\t is_accepted = EXCLUDED.is_accepted,\n1850\t\t\t score = EXCLUDED.score,\n1851\t\t\t up_vote_count = EXCLUDED.up_vote_count,\n1852\t\t\t down_vote_count = EXCLUDED.down_vote_count,\n1853\t\t\t updated_at = EXCLUDED.updated_at\n1854\t\t\tRETURNING id, question_id, user_id, body_markdown, body_html,\n1855\t\t\t is_accepted, score, up_vote_count, down_vote_count, created_at, updated_at`,\n1856\t\t\tparams.LegacyID, params.QuestionLegacyID, params.UserLegacyID,\n1857\t\t\tparams.BodyMarkdown, params.BodyHTML, params.IsAccepted,\n1858\t\t\tparams.Score, params.UpVoteCount, params.DownVoteCount,\n1859\t\t\tparams.CreatedAt, params.UpdatedAt).\n1860\t\t\tScan(&a.ID, &a.QuestionID, &a.UserID, &a.BodyMarkdown, &a.BodyHTML,\n1861\t\t\t\t&a.IsAccepted, &a.Score, &a.UpVoteCount, &a.DownVoteCount, &a.CreatedAt, &a.UpdatedAt)\n1862\t\tif err != nil {\n1863\t\t\treturn nil, fmt.Errorf(\"upsert answer: %w\", err)\n1864\t\t}\n1865\t\treturn &a, nil\n1866\t}\n1867\t```\n1868\t\n1869\t- [ ] **Step 2: Write `internal/store/comments.go`**\n1870\t\n1871\t```go\n1872\tpackage store\n1873\t\n1874\timport (\n1875\t\t\"context\"\n1876\t\t\"fmt\"\n1877\t)\n1878\t\n1879\tfunc (p *Postgres) ListCommentsByPost(ctx context.Context, postID int, postType string) ([]*Comment, error) {\n1880\t\trows, err := p.db.Query(ctx, `\n1881\t\t\tSELECT c.id, c.user_id, c.post_id, c.post_type, c.body_markdown, c.body_html, c.created_at,\n1882\t\t\t u.id, u.display_name, u.profile_image\n1883\t\t\tFROM comments c JOIN users u ON u.id=c.user_id\n1884\t\t\tWHERE c.post_id=$1 AND c.post_type=$2\n1885\t\t\tORDER BY c.created_at ASC`, postID, postType)\n1886\t\tif err != nil {\n1887\t\t\treturn nil, fmt.Errorf(\"list comments: %w\", err)\n1888\t\t}\n1889\t\tdefer rows.Close()\n1890\t\n1891\t\tvar comments []*Comment\n1892\t\tfor rows.Next() {\n1893\t\t\tc := &Comment{Owner: &User{}}\n1894\t\t\tif err := rows.Scan(\n1895\t\t\t\t&c.ID, &c.UserID, &c.PostID, &c.PostType, &c.BodyMarkdown, &c.BodyHTML, &c.CreatedAt,\n1896\t\t\t\t&c.Owner.ID, &c.Owner.DisplayName, &c.Owner.ProfileImage,\n1897\t\t\t); err != nil {\n1898\t\t\t\treturn nil, fmt.Errorf(\"scan comment: %w\", err)\n1899\t\t\t}\n1900\t\t\tcomments = append(comments, c)\n1901\t\t}\n1902\t\treturn comments, rows.Err()\n1903\t}\n1904\t\n1905\tfunc (p *Postgres) CreateComment(ctx context.Context, params CreateCommentParams) (*Comment, error) {\n1906\t\tvar c Comment\n1907\t\terr := p.db.QueryRow(ctx, `\n1908\t\t\tINSERT INTO comments (user_id, post_id, post_type, body_markdown, body_html)\n1909\t\t\tVALUES ($1,$2,$3,$4,$5)\n1910\t\t\tRETURNING id, user_id, post_id, post_type, body_markdown, body_html, created_at`,\n1911\t\t\tparams.UserID, params.PostID, params.PostType, params.BodyMarkdown, params.BodyHTML).\n1912\t\t\tScan(&c.ID, &c.UserID, &c.PostID, &c.PostType, &c.BodyMarkdown, &c.BodyHTML, &c.CreatedAt)\n1913\t\tif err != nil {\n1914\t\t\treturn nil, fmt.Errorf(\"create comment: %w\", err)\n1915\t\t}\n1916\t\treturn &c, nil\n1917\t}\n1918\t\n1919\tfunc (p *Postgres) DeleteComment(ctx context.Context, id int) error {\n1920\t\t_, err := p.db.Exec(ctx, `DELETE FROM comments WHERE id=$1`, id)\n1921\t\treturn err\n1922\t}\n1923\t```\n1924\t\n1925\t- [ ] **Step 3: Write `internal/store/votes.go`**\n1926\t\n1927\t```go\n1928\tpackage store\n1929\t\n1930\timport (\n1931\t\t\"context\"\n1932\t\t\"fmt\"\n1933\t)\n1934\t\n1935\tfunc (p *Postgres) CastVote(ctx context.Context, params CastVoteParams) error {\n1936\t\tif params.VoteType == 0 {\n1937\t\t\t// Retract vote\n1938\t\t\t_, err := p.db.Exec(ctx, `DELETE FROM votes WHERE user_id=$1 AND post_id=$2 AND post_type=$3`,\n1939\t\t\t\tparams.UserID, params.PostID, params.PostType)\n1940\t\t\tif err != nil {\n1941\t\t\t\treturn fmt.Errorf(\"retract vote: %w\", err)\n1942\t\t\t}\n1943\t\t} else {\n1944\t\t\t_, err := p.db.Exec(ctx, `\n1945\t\t\t\tINSERT INTO votes (user_id, post_id, post_type, vote_type)\n1946\t\t\t\tVALUES ($1,$2,$3,$4)\n1947\t\t\t\tON CONFLICT (post_id, post_type, user_id) DO UPDATE SET vote_type=EXCLUDED.vote_type`,\n1948\t\t\t\tparams.UserID, params.PostID, params.PostType, params.VoteType)\n1949\t\t\tif err != nil {\n1950\t\t\t\treturn fmt.Errorf(\"cast vote: %w\", err)\n1951\t\t\t}\n1952\t\t}\n1953\t\n1954\t\t// Recompute cached counts from votes table\n1955\t\ttable := params.PostType + \"s\" // \"questions\" or \"answers\"\n1956\t\t_, err := p.db.Exec(ctx, fmt.Sprintf(`\n1957\t\t\tUPDATE %s SET\n1958\t\t\t up_vote_count = (SELECT COUNT(*) FROM votes WHERE post_id=$1 AND post_type=$2 AND vote_type=1),\n1959\t\t\t down_vote_count = (SELECT COUNT(*) FROM votes WHERE post_id=$1 AND post_type=$2 AND vote_type=-1),\n1960\t\t\t score = (SELECT COALESCE(SUM(vote_type), 0) FROM votes WHERE post_id=$1 AND post_type=$2)\n1961\t\t\tWHERE id=$1`, table),\n1962\t\t\tparams.PostID, params.PostType)\n1963\t\treturn err\n1964\t}\n1965\t```\n1966\t\n1967\t- [ ] **Step 4: Run tests**\n1968\t\n1969\t```bash\n1970\tTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n1971\t go test -race ./internal/store/... -v\n1972\t```\n1973\t\n1974\tExpected: PASS\n1975\t\n1976\t- [ ] **Step 5: Commit**\n1977\t\n1978\t```bash\n1979\tgit add internal/store/answers.go internal/store/comments.go internal/store/votes.go\n1980\tgit commit -m \"feat: answer, comment, and vote store implementations\"\n1981\t```\n1982\t\n1983\t---\n1984\t\n1985\t## Task 8: Store β Articles & Search\n1986\t\n1987\t**Files:**\n1988\t- Create: `internal/store/articles.go`\n1989\t- Create: `internal/store/search.go`\n1990\t\n1991\t- [ ] **Step 1: Write `internal/store/articles.go`**\n1992\t\n1993\t```go\n1994\tpackage store\n1995\t\n1996\timport (\n1997\t\t\"context\"\n1998\t\t\"fmt\"\n1999\t)\n2000\t\n2001\tfunc (p *Postgres) ListArticles(ctx context.Context) ([]*Article, error) {\n2002\t\trows, err := p.db.Query(ctx, `\n2003\t\t\tSELECT a.id, a.user_id, a.title, a.body_markdown, a.body_html, a.article_type,\n2004\t\t\t a.view_count, a.score, a.created_at, a.updated_at,\n2005\t\t\t u.id, u.display_name, u.profile_image,\n2006\t\t\t COALESCE(array_agg(DISTINCT t.name) FILTER (WHERE t.name IS NOT NULL), '{}')\n2007\t\t\tFROM articles a\n2008\t\t\tJOIN users u ON u.id=a.user_id\n2009\t\t\tLEFT JOIN article_tags at ON at.article_id=a.id\n2010\t\t\tLEFT JOIN tags t ON t.id=at.tag_id\n2011\t\t\tGROUP BY a.id, u.id\n2012\t\t\tORDER BY a.created_at DESC`)\n2013\t\tif err != nil {\n2014\t\t\treturn nil, fmt.Errorf(\"list articles: %w\", err)\n2015\t\t}\n2016\t\tdefer rows.Close()\n2017\t\n2018\t\tvar articles []*Article\n2019\t\tfor rows.Next() {\n2020\t\t\ta := &Article{Owner: &User{}}\n2021\t\t\tif err := rows.Scan(\n2022\t\t\t\t&a.ID, &a.UserID, &a.Title, &a.BodyMarkdown, &a.BodyHTML, &a.ArticleType,\n2023\t\t\t\t&a.ViewCount, &a.Score, &a.CreatedAt, &a.UpdatedAt,\n2024\t\t\t\t&a.Owner.ID, &a.Owner.DisplayName, &a.Owner.ProfileImage,\n2025\t\t\t\t&a.Tags,\n2026\t\t\t); err != nil {\n2027\t\t\t\treturn nil, fmt.Errorf(\"scan article: %w\", err)\n2028\t\t\t}\n2029\t\t\tarticles = append(articles, a)\n2030\t\t}\n2031\t\treturn articles, rows.Err()\n2032\t}\n2033\t\n2034\tfunc (p *Postgres) GetArticle(ctx context.Context, id int) (*Article, error) {\n2035\t\ta := &Article{Owner: &User{}}\n2036\t\terr := p.db.QueryRow(ctx, `\n2037\t\t\tSELECT a.id, a.user_id, a.title, a.body_markdown, a.body_html, a.article_type,\n2038\t\t\t a.view_count, a.score, a.created_at, a.updated_at,\n2039\t\t\t u.id, u.display_name, u.profile_image,\n2040\t\t\t COALESCE(array_agg(DISTINCT t.name) FILTER (WHERE t.name IS NOT NULL), '{}')\n2041\t\t\tFROM articles a\n2042\t\t\tJOIN users u ON u.id=a.user_id\n2043\t\t\tLEFT JOIN article_tags at ON at.article_id=a.id\n2044\t\t\tLEFT JOIN tags t ON t.id=at.tag_id\n2045\t\t\tWHERE a.id=$1\n2046\t\t\tGROUP BY a.id, u.id`, id).\n2047\t\t\tScan(&a.ID, &a.UserID, &a.Title, &a.BodyMarkdown, &a.BodyHTML, &a.ArticleType,\n2048\t\t\t\t&a.ViewCount, &a.Score, &a.CreatedAt, &a.UpdatedAt,\n2049\t\t\t\t&a.Owner.ID, &a.Owner.DisplayName, &a.Owner.ProfileImage,\n2050\t\t\t\t&a.Tags)\n2051\t\tif err != nil {\n2052\t\t\treturn nil, fmt.Errorf(\"get article: %w\", err)\n2053\t\t}\n2054\t\treturn a, nil\n2055\t}\n2056\t\n2057\tfunc (p *Postgres) UpsertArticleFromImport(ctx context.Context, params UpsertArticleParams) (*Article, error) {\n2058\t\tvar a Article\n2059\t\terr := p.db.QueryRow(ctx, `\n2060\t\t\tINSERT INTO articles (legacy_id, user_id, title, body_markdown, body_html,\n2061\t\t\t article_type, view_count, score, created_at, updated_at)\n2062\t\t\tSELECT $1, (SELECT id FROM users WHERE legacy_id=$2), $3,$4,$5,$6,$7,$8,$9,$10\n2063\t\t\tON CONFLICT (legacy_id) WHERE legacy_id IS NOT NULL DO UPDATE SET\n2064\t\t\t title = EXCLUDED.title,\n2065\t\t\t body_markdown = EXCLUDED.body_markdown,\n2066\t\t\t body_html = EXCLUDED.body_html,\n2067\t\t\t view_count = EXCLUDED.view_count,\n2068\t\t\t score = EXCLUDED.score,\n2069\t\t\t updated_at = EXCLUDED.updated_at\n2070\t\t\tRETURNING id, user_id, title, body_markdown, body_html, article_type,\n2071\t\t\t view_count, score, created_at, updated_at`,\n2072\t\t\tparams.LegacyID, params.UserLegacyID, params.Title, params.BodyMarkdown, params.BodyHTML,\n2073\t\t\tparams.ArticleType, params.ViewCount, params.Score, params.CreatedAt, params.UpdatedAt).\n2074\t\t\tScan(&a.ID, &a.UserID, &a.Title, &a.BodyMarkdown, &a.BodyHTML, &a.ArticleType,\n2075\t\t\t\t&a.ViewCount, &a.Score, &a.CreatedAt, &a.UpdatedAt)\n2076\t\tif err != nil {\n2077\t\t\treturn nil, fmt.Errorf(\"upsert article: %w\", err)\n2078\t\t}\n2079\t\n2080\t\t// Set tags\n2081\t\tif _, err := p.db.Exec(ctx, `DELETE FROM article_tags WHERE article_id=$1`, a.ID); err != nil {\n2082\t\t\treturn nil, err\n2083\t\t}\n2084\t\tfor _, name := range params.Tags {\n2085\t\t\tif _, err := p.db.Exec(ctx, `\n2086\t\t\t\tINSERT INTO article_tags (article_id, tag_id)\n2087\t\t\t\tSELECT $1, id FROM tags WHERE name=$2\n2088\t\t\t\tON CONFLICT DO NOTHING`, a.ID, name); err != nil {\n2089\t\t\t\treturn nil, fmt.Errorf(\"set article tag %q: %w\", name, err)\n2090\t\t\t}\n2091\t\t}\n2092\t\treturn &a, nil\n2093\t}\n2094\t```\n2095\t\n2096\t- [ ] **Step 2: Write `internal/store/search.go`**\n2097\t\n2098\t```go\n2099\tpackage store\n2100\t\n2101\timport (\n2102\t\t\"context\"\n2103\t\t\"fmt\"\n2104\t)\n2105\t\n2106\tfunc (p *Postgres) Search(ctx context.Context, query string) ([]SearchResult, error) {\n2107\t\tif query == \"\" {\n2108\t\t\treturn nil, nil\n2109\t\t}\n2110\t\trows, err := p.db.Query(ctx, `\n2111\t\t\tSELECT 'question' as kind, id, title,\n2112\t\t\t ts_headline('english', body_markdown, plainto_tsquery('english', $1),\n2113\t\t\t 'MaxWords=20, MinWords=5, StartSel=, StopSel=') as excerpt,\n2114\t\t\t COALESCE((SELECT array_agg(t.name) FROM question_tags qt JOIN tags t ON t.id=qt.tag_id WHERE qt.question_id=q.id), '{}'),\n2115\t\t\t ts_rank(search_vector, plainto_tsquery('english', $1)) as rank,\n2116\t\t\t created_at\n2117\t\t\tFROM questions q\n2118\t\t\tWHERE search_vector @@ plainto_tsquery('english', $1) AND is_deleted=FALSE\n2119\t\n2120\t\t\tUNION ALL\n2121\t\n2122\t\t\tSELECT 'article' as kind, id, title,\n2123\t\t\t ts_headline('english', body_markdown, plainto_tsquery('english', $1),\n2124\t\t\t 'MaxWords=20, MinWords=5, StartSel=, StopSel=') as excerpt,\n2125\t\t\t COALESCE((SELECT array_agg(t.name) FROM article_tags at JOIN tags t ON t.id=at.tag_id WHERE at.article_id=a.id), '{}'),\n2126\t\t\t ts_rank(search_vector, plainto_tsquery('english', $1)) as rank,\n2127\t\t\t created_at\n2128\t\t\tFROM articles a\n2129\t\t\tWHERE search_vector @@ plainto_tsquery('english', $1)\n2130\t\n2131\t\t\tORDER BY rank DESC\n2132\t\t\tLIMIT 50`, query)\n2133\t\tif err != nil {\n2134\t\t\treturn nil, fmt.Errorf(\"search query: %w\", err)\n2135\t\t}\n2136\t\tdefer rows.Close()\n2137\t\n2138\t\tvar results []SearchResult\n2139\t\tfor rows.Next() {\n2140\t\t\tvar r SearchResult\n2141\t\t\tif err := rows.Scan(&r.Kind, &r.ID, &r.Title, &r.Excerpt, &r.Tags, &r.Score, &r.CreatedAt); err != nil {\n2142\t\t\t\treturn nil, fmt.Errorf(\"scan search result: %w\", err)\n2143\t\t\t}\n2144\t\t\tresults = append(results, r)\n2145\t\t}\n2146\t\treturn results, rows.Err()\n2147\t}\n2148\t```\n2149\t\n2150\t- [ ] **Step 3: Run all store tests**\n2151\t\n2152\t```bash\n2153\tTEST_DATABASE_URL=\"postgres://heapoverflow:heapoverflow@localhost:5432/heapoverflow?sslmode=disable\" \\\n2154\t go test -race ./internal/store/... -v\n2155\t```\n2156\t\n2157\tExpected: PASS\n2158\t\n2159\t- [ ] **Step 4: Verify Store interface is fully satisfied**\n2160\t\n2161\tAdd a compile-time assertion to `internal/store/store.go`:\n2162\t\n2163\t```go\n2164\t// Compile-time assertion that Postgres satisfies Store.\n2165\tvar _ Store = (*Postgres)(nil)\n2166\t```\n2167\t\n2168\t```bash\n2169\tgo build ./internal/store/...\n2170\t```\n2171\t\n2172\tExpected: compiles (if any Store method is missing, this will fail with a clear error).\n2173\t\n2174\t- [ ] **Step 5: Commit**\n2175\t\n2176\t```bash\n2177\tgit add internal/store/articles.go internal/store/search.go internal/store/store.go\n2178\tgit commit -m \"feat: article and search store; compile-time Store interface assertion\"\n2179\t```\n2180\t\n2181\t---\n2182\t\n2183\t## Task 9: Markdown Renderer\n2184\t\n2185\t**Files:**\n2186\t- Create: `internal/markdown/render.go`\n2187\t- Create: `internal/markdown/render_test.go`\n2188\t\n2189\t- [ ] **Step 1: Write failing test**\n2190\t\n2191\t```go\n2192\t// internal/markdown/render_test.go\n2193\tpackage markdown_test\n2194\t\n2195\timport (\n2196\t\t\"strings\"\n2197\t\t\"testing\"\n2198\t\n2199\t\t\"github.com/immuta/heapoverflow/internal/markdown\"\n2200\t\t\"github.com/stretchr/testify/assert\"\n2201\t\t\"github.com/stretchr/testify/require\"\n2202\t)\n2203\t\n2204\tfunc TestRender_Basic(t *testing.T) {\n2205\t\thtml, err := markdown.Render(\"**hello** world\")\n2206\t\trequire.NoError(t, err)\n2207\t\tassert.Contains(t, html, \"hello\")\n2208\t\tassert.Contains(t, html, \"world\")\n2209\t}\n2210\t\n2211\tfunc TestRender_CodeBlock(t *testing.T) {\n2212\t\thtml, err := markdown.Render(\"```go\\nfmt.Println(\\\"hi\\\")\\n```\")\n2213\t\trequire.NoError(t, err)\n2214\t\tassert.Contains(t, html, \"