save-session
Save AI agent session information for later resumption. Use when: (1) Finishing a work session and want to save progress (2) User says "save session", "remember this session", or "save your session ID" (3) Before ending a long coding/debugging session (4) When user wants to be able to resume this conversation later Supports Claude, Codex, Gemini, Copilot, Cursor, and other AI agents.
What this skill does
# Save Session
Save session metadata to `docs/.ai/sessions.json` for future resumption by any AI agent.
## Usage
```bash
python3 ~/.agents/skills/save-session/scripts/save_session.py \
--session-id "SESSION_ID" \
--agent "claude" \
--summary "Brief description of work done" \
--repo-root "$(pwd)"
```
For Codex, you can use automatic detection:
```bash
python3 ~/.agents/skills/save-session/scripts/save_session.py \
--session-id auto \
--agent codex \
--summary "Brief description of work done" \
--repo-root "$(pwd)"
```
## Finding Your Session ID by Agent
### Claude Code
**Session storage:** `~/.claude/projects/<project-hash>/<SESSION_ID>.jsonl`
**How to find:**
- Extract UUID from file paths in context (e.g., tool output paths contain the session ID)
- Use `/status` command to see session info
- List sessions: `claude --resume` (interactive picker)
**Environment:** `CLAUDE_CONFIG_DIR` changes storage location (default: `~/.claude`)
**Resume:** `claude --resume SESSION_ID` or `claude -r SESSION_ID`
### OpenAI Codex CLI
**Session storage:** `~/.codex/sessions/`
**How to find:**
- Use `/status` command within Codex
- Copy from session picker
- List files in `~/.codex/sessions/`
- Or pass `--session-id auto` (uses latest `~/.codex/shell_snapshots/*.sh` filename; verify if multiple sessions are active)
**Note:** Session ID is not currently exposed to the model itself (see GitHub issue #5912)
**Resume:** `codex resume SESSION_ID`
### Google Gemini CLI
**Session storage:** `~/.gemini/tmp/<project_hash>/chats/`
**How to find:**
- Use `gemini --list-sessions` to see all sessions with UUIDs
- Sessions are project-specific
**Resume options:**
- `gemini --resume` (latest session)
- `gemini --resume <UUID>` (specific session)
- `gemini --resume <index>` (by index number)
- `/resume` command within interactive mode
### GitHub Copilot CLI
**How to find:**
- Use `/session` or `/usage` command to display current session ID
- Use `gh agent-task list` (requires gh v2.80.0+)
- Use `gh agent-task view` for session details
**Resume:** `/resume SESSION_ID` or `/resume last`
**Note:** Auto-compaction maintains context across long sessions
### Cursor IDE
**Session storage:** SQLite databases in workspace storage
- **macOS:** `~/Library/Application Support/Cursor/User/workspaceStorage/`
- **Linux:** `~/.config/Cursor/User/workspaceStorage/`
- **Windows:** `%APPDATA%\Cursor\User\workspaceStorage\`
**How to find:** Sessions stored in `.vscdb` files as JSON blobs
**Note:** No built-in session ID. Use SpecStory extension for backup/export.
### Aider
**Session storage:** Chat history in `.aider.chat.history.md` in repo root
**Note:** No formal session ID system. History is file-based and can be referenced by timestamp.
## Session File Format
```json
{
"sessions": [
{
"id": "uuid-session-id",
"agent": "claude",
"summary": "Implemented multi-platform CI",
"created_at": "2026-01-31T15:45:00Z",
"tags": ["ci", "rust"]
}
]
}
```
## Resuming Sessions
| Agent | Resume Command |
|-------|----------------|
| Claude Code | `claude --resume SESSION_ID` |
| Codex | `codex resume SESSION_ID` |
| Gemini CLI | `gemini --resume SESSION_ID` |
| Copilot CLI | `/resume SESSION_ID` |
| Cursor | Restore from workspaceStorage backup |
| Aider | Reference `.aider.chat.history.md` |
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