# Conversation a3e6a076f0ba8db7e

- Source: `claude`
- User: `pascal`
- System: `Pascals-MBP.local`
- Started: `2026-02-24T17:17:42.578Z`
- CWD: `/Users/pascal/Code/business/convx`

## User

_`2026-02-24T17:17:42.578Z`_

In the repo at /Users/pascal/Code/business/convx, find one or two actual exported session JSON blob files (they live under history/ directories, likely hidden files starting with . or just .json files alongside .md files). Read them and report:
1. The full top-level structure/keys
2. What timestamp fields exist (started_at, created_at, updated_at, etc.) and their format
3. What the messages look like — keys, content field name, whether there's a per-message timestamp
4. What project/cwd field exists if any
5. Approximate size/content of a typical session

Also look at src/convx_ai/models.py and report the NormalizedSession and NormalizedMessage model fields.

## Agent

_`2026-02-24T17:17:43.830Z`_

I'll help you find and analyze the exported session JSON blob files and examine the models. Let me start by exploring the structure.

## Agent

_`2026-02-24T17:17:45.739Z`_

Now let me read a couple of the actual session JSON blob files to see the real structure:

## Agent

_`2026-02-24T17:17:48.018Z`_

Good start! Let me read the second file with a limit:

## Agent

_`2026-02-24T17:17:51.774Z`_

Perfect! Now let me check the size of one more file and get a better sample:

## Agent

_`2026-02-24T17:17:53.638Z`_

Now let me get a better view of the second JSON file to see the timestamp fields:

## Agent

_`2026-02-24T17:17:55.203Z`_

Excellent! Now let me get the end of the codex JSON file to see the top-level structure:

## Agent

_`2026-02-24T17:18:09.258Z`_

Perfect! Now I have all the information I need. Let me create a comprehensive report:

## Summary of Session JSON Blob Files and Models

Based on my analysis of actual exported session JSON files and the models definition, here's the complete structure:

---

### 1. Top-Level Structure/Keys (JSON Blob)

All session JSON files have these top-level keys:

- `session_key` - unique identifier (format: `<source_system>:<session_id>`)
- `source_system` - string ("cursor", "codex", "claude")
- `session_id` - UUID string
- `source_path` - absolute file path to original source
- `started_at` - ISO 8601 timestamp (session start)
- `user` - username string
- `system_name` - machine name
- `cwd` - current working directory where session occurred
- `messages` - array of message objects
- `summary` - optional string (null in many cases)
- `child_sessions` - optional nested array (null in observed cases)

---

### 2. Timestamp Fields and Format

**Session-level timestamps:**
- `started_at`: ISO 8601 format with UTC timezone (e.g., `"2026-02-19T18:05:59.880000Z"`)

**Per-message timestamps:**
- Each message has a `timestamp` field
- Format: ISO 8601 with millisecond precision and `Z` suffix (e.g., `"2026-02-15T16:42:31.307Z"`)
- Can be `null` for some messages (e.g., in Cursor sessions, often null for user/assistant messages)
- Always present and populated for system messages and tool call/result messages

---

### 3. Message Structure

Each message in the `messages` array is an object with:

- `role` - string ("user", "assistant", "system", "tool")
- `text` - string (message content, can be very long multi-line text)
- `kind` - string ("user" | "assistant" | "system" | "tool")
  - Distinguishes rendering roles; system messages may have `kind="system"` even if `role="user"` (for injected context)
- `timestamp` - ISO 8601 string or `null`

**Example from Cursor session:**
```json
{
  "kind": "user",
  "role": "user",
  "text": "let's come up with a simple UI to explore the history...",
  "timestamp": null
}
```

**Example from Codex session:**
```json
{
  "kind": "assistant",
  "role": "assistant",
  "text": "I found Codex-related files...",
  "timestamp": "2026-02-15T16:42:39.602Z"
}
```

---

### 4. Project/CWD Field

- **Field name:** `cwd` (string)
- **Example:** `/Users/pascal/Code/business/convx`
- Present in all exported sessions
- Represents the working directory context when the session was created/exported

---

### 5. Typical Session Size

From actual files in the repo:

| Source | File | Size | Lines | Messages |
|--------|------|------|-------|----------|
| Cursor | `.2026-02-19-1805-ui-design-for-history-exploration.json` | 26 KB | ~400-500 | ~94 messages |
| Codex | `.2026-02-15-1642-can-you-check--history-codex-...json` | 67 KB | 350 | ~95+ messages |

Typical characteristics:
- Ranges from ~26-67 KB for moderate-length conversations
- Messages can be very long (multi-paragraph assistant responses with code blocks)
- System messages with instructions/context can be several KB each

---

### 6. NormalizedSession Model Fields

From `/Users/pascal/Code/business/convx/src/convx_ai/models.py`:

```python
@dataclass
class NormalizedSession:
    session_key: str              # Format: "<source_system>:<session_id>"
    source_system: str            # "cursor", "codex", "claude", etc.
    session_id: str               # UUID
    source_path: str              # Absolute path to original source file
    started_at: str               # ISO 8601 timestamp (UTC)
    user: str                     # Username
    system_name: str              # Machine hostname
    cwd: str                      # Working directory
    messages: list[NormalizedMessage]  # Array of normalized messages
    summary: str | None = None    # Optional session title/summary
    child_sessions: list["NormalizedSession"] | None = None  # Nested sessions
```

**Helper method:**
- `to_dict()` - converts dataclass to dict with messages expanded

---

### 7. NormalizedMessage Model Fields

From the same models file:

```python
@dataclass
class NormalizedMessage:
    role: str                     # "user", "assistant", "system", "tool"
    text: str                     # Message content
    timestamp: str | None = None  # ISO 8601 or None
    kind: str = "user"            # Rendering classification:
                                  # "user" | "assistant" | "system" | "tool"
```

**Key point on `kind`:** This field classifies how the message should be rendered and is used to distinguish between actual user input vs. injected system context (both might have `role="user"` but one is `kind="system"`).

---

### File Paths for Reference

- **Cursor session example:** `/Users/pascal/Code/business/convx/history/pascal/cursor/.2026-02-19-1805-ui-design-for-history-exploration.json`
- **Codex session example:** `/Users/pascal/Code/business/convx/history/pascal/codex/.2026-02-15-1642-can-you-check--history-codex-for-the-previous-conversation-w.json`
- **Models definition:** `/Users/pascal/Code/business/convx/src/convx_ai/models.py`
