OpenCode Session Reader

读取本地 OpenCode SQLite 数据库，支持跨目录检索 session、message、part、project。

适用场景

• 列出最近会话、按目录过滤、按标题搜索
• 读取某个 session 的 message JSON
• 查看 OpenCode 数据库结构和索引（按需读取 references/schema.md）

工作流程

1. 通过 opencode db path 解析数据库路径。
2. 所有查询只读执行，避免误写。
3. 需要字段细节时再读取 references/schema.md。

1. 解析数据库路径

if ! command -v opencode >/dev/null 2>&1; then
  echo "opencode command not found in PATH" >&2
  exit 1
fi

if ! DB_PATH="$(opencode db path 2>/dev/null)"; then
  echo "Failed to resolve OpenCode DB path via: opencode db path" >&2
  exit 1
fi

if [ -z "${DB_PATH:-}" ] || [ ! -f "$DB_PATH" ]; then
  echo "OpenCode DB not found: $DB_PATH" >&2
  exit 1
fi

echo "Using DB: $DB_PATH"

列出当前存在的 DB 文件（无匹配也不会报错）：

find "${XDG_DATA_HOME:-$HOME/.local/share}/opencode" -maxdepth 1 -name '*.db' -print 2>/dev/null

2. 时间转换与格式化

时间转换：所有时间字段为毫秒级 Unix timestamp，可用 datetime() 直接在 SQL 中转换。

# 在 SQL 中转换（推荐，无需外部命令）
datetime(time_updated/1000, 'unixepoch', 'localtime')

# 用 shell 辅助变量计算时间范围
NOW_MS=$(date +%s000)
LAST_7D=$((NOW_MS - 7*86400*1000))   # 最近 7 天
LAST_30D=$((NOW_MS - 30*86400*1000))  # 最近 30 天

表格对齐：普通字段查询可通过 column -t -s '|' 对齐（SQLite 默认列分隔符为 |）；包含 message.data 这类长 JSON 字段时建议使用 -json 输出。

sqlite3 -readonly "$DB_PATH" "SELECT id, title, time_updated FROM session LIMIT 5;" | column -t -s '|'

3. 常用只读查询

> 💡 不含长 JSON 字段的查询可追加 | column -t -s '|' 以对齐输出表格。

列出最近 20 个 session（按更新时间倒序）

sqlite3 -readonly "$DB_PATH" \
  "SELECT id, title, directory,
          datetime(time_updated/1000,'unixepoch','localtime') as updated
   FROM session
   ORDER BY time_updated DESC
   LIMIT 20;" | column -t -s '|'

按目录过滤 session

sqlite3 -readonly "$DB_PATH" \
  "SELECT id, title, datetime(time_updated/1000,'unixepoch','localtime') as updated
   FROM session
   WHERE directory LIKE '/path/to/project%'
   ORDER BY time_updated DESC
   LIMIT 20;" | column -t -s '|'

按 project_id 过滤 session（最精确的目录关联方式）

sqlite3 -readonly "$DB_PATH" \
  "SELECT s.id, s.title, s.directory,
          datetime(s.time_updated/1000,'unixepoch','localtime') as updated
   FROM session s
   WHERE s.project_id = 'your-project-id'
   ORDER BY s.time_updated DESC
   LIMIT 20;" | column -t -s '|'

> project_id 对应 project 表的 id 字段，可通过 SELECT id, worktree, name FROM project; 查看项目列表。

跨所有目录全量列出 session（带 project 信息）

sqlite3 -readonly "$DB_PATH" \
  "SELECT s.id, s.title, s.directory, p.worktree,
          datetime(s.time_updated/1000,'unixepoch','localtime') as updated
   FROM session s
   LEFT JOIN project p ON s.project_id = p.id
   ORDER BY s.time_updated DESC
   LIMIT 50;" | column -t -s '|'

按时间范围过滤

# 最近 7 天活跃的 session
sqlite3 -readonly "$DB_PATH" \
  "SELECT id, title, datetime(time_updated/1000,'unixepoch','localtime') as updated
   FROM session
   WHERE time_updated > $(( $(date +%s000) - 7*86400*1000 ))
   ORDER BY time_updated DESC
   LIMIT 20;" | column -t -s '|'

# 今天创建的 session
sqlite3 -readonly "$DB_PATH" \
  "SELECT id, title, datetime(time_created/1000,'unixepoch','localtime') as created
   FROM session
   WHERE date(time_created/1000,'unixepoch','localtime') = date('now','localtime')
   ORDER BY time_created DESC
   LIMIT 20;" | column -t -s '|'

查看某 session 的消息内容

sqlite3 -readonly -json "$DB_PATH" \
  "SELECT m.id, datetime(m.time_created/1000,'unixepoch','localtime') as created, m.data
   FROM message m
   WHERE m.session_id = 'your-session-id'
   ORDER BY m.time_created ASC;"

解析 message.data JSON 字段

# 提取 role、modelID 等关键字段（json_extract）
sqlite3 -readonly "$DB_PATH" \
  "SELECT id,
          json_extract(data, '$.role') as role,
          json_extract(data, '$.modelID') as model,
          datetime(time_created/1000,'unixepoch','localtime') as created
   FROM message
   WHERE session_id = 'your-session-id'
   ORDER BY time_created ASC;" | column -t -s '|'

# 搜索 message 内容（full-text like）
sqlite3 -readonly "$DB_PATH" \
  "SELECT id, json_extract(data, '$.role') as role, time_created
   FROM message
   WHERE data LIKE '%keyword%'
   ORDER BY time_created DESC
   LIMIT 20;" | column -t -s '|'

搜索 session 标题

sqlite3 -readonly "$DB_PATH" \
  "SELECT id, title, directory, datetime(time_updated/1000,'unixepoch','localtime') as updated
   FROM session
   WHERE title LIKE '%keyword%'
   ORDER BY time_updated DESC
   LIMIT 20;" | column -t -s '|'

查看会话统计

sqlite3 -readonly "$DB_PATH" \
  "SELECT title, summary_additions, summary_deletions, summary_files,
          datetime(time_created/1000,'unixepoch','localtime') as created
   FROM session
   ORDER BY time_updated DESC
   LIMIT 20;" | column -t -s '|'

4. 查看 schema

sqlite3 -readonly "$DB_PATH" ".schema session"
sqlite3 -readonly "$DB_PATH" ".schema message"
sqlite3 -readonly "$DB_PATH" ".schema part"
sqlite3 -readonly "$DB_PATH" ".schema project"

完整字段与索引说明见 references/schema.md。

5. 查看所有表

sqlite3 -readonly "$DB_PATH" ".tables"

6. 示例输出

id          title                     directory                   updated
----------  -----------------------  --------------------------  -------------------
ses_abc123  My Session - 2026-03-24  /home/user/project         2026-03-24 10:00:00
ses_def456  Another Session          /home/user/other           2026-03-23 15:30:00

（配合 | column -t -s '|' 对齐后的效果）

7. 注意事项

• 数据库使用 WAL 模式，会产生 .db-wal 和 .db-shm 文件
• 所有时间字段为毫秒级 Unix timestamp，用 datetime(ts/1000,'unixepoch','localtime') 在 SQL 中直接转换
• data 字段为 JSON：做结构化抽取时用 json_extract(data, '$.field')，查看原始消息时优先 sqlite3 -json
• Session 隔离按 project_id，跨目录检索时建议关联 project.worktree
• 直接修改数据库可能导致数据损坏，操作前建议备份
• account / control_account 表含敏感凭证，查询时注意脱敏