# Conversation ab982a4fd68e3cee9

- Source: `claude`
- User: `pascal`
- System: `Pascals-MBP.local`
- Started: `2026-02-24T19:30:11.880Z`
- CWD: `/Users/pascal/Code/business/convx`

## User

_`2026-02-24T19:30:11.880Z`_

Look at the convx codebase at /Users/pascal/Code/business/convx. I need to understand:
1. How the Claude adapter discovers sessions (src/convx_ai/adapters/ directory)
2. How sessions are filtered in engine.py and cli.py
3. What the session key format is for Claude sessions
4. How the cwd filtering works for the sync command
5. Any recent changes or issues in the Claude adapter

Please read all relevant files and provide a detailed summary of the code, especially anything that might cause Claude sessions from the current working directory to not be picked up.

## Agent

_`2026-02-24T19:30:13.100Z`_

I'll explore the codebase to understand the Claude adapter, session discovery, filtering, and how the cwd filtering works. Let me start by examining the key files.

## Agent

_`2026-02-24T19:30:15.067Z`_

Now let me read the key files:

## Agent

_`2026-02-24T19:30:16.988Z`_

Now let me look at the models to understand the data structures:

## Agent

_`2026-02-24T19:30:19.199Z`_

Let me check the recent commit that mentions this issue:

## Agent

_`2026-02-24T19:30:21.089Z`_

Perfect! Now let me verify the current state of the code and check for any other related files:

## Agent

_`2026-02-24T19:30:23.192Z`_

Now let me check the tests to understand better how filtering works:

## Agent

_`2026-02-24T19:30:25.922Z`_

Now let me check one more test to understand the sync filtering better:

## Agent

_`2026-02-24T19:30:47.541Z`_

Perfect! Now let me create a comprehensive summary document:

## Summary Report: Claude Adapter Session Discovery and CWD Filtering

Based on my thorough analysis of the convx codebase, here's a detailed explanation of how Claude sessions are discovered, filtered, and processed:

### 1. **Claude Adapter Session Discovery** (`src/convx_ai/adapters/claude.py`)

**Location**: `~/.claude/projects/` (default)

The `ClaudeAdapter.discover_files()` method (lines 147-189) works as follows:

1. **Project Directory Enumeration**: Iterates through subdirectories in the input path (`~/.claude/projects/`)
2. **Project Name Encoding**: Project directories are named by encoding the full repository path with a special format:
   - Forward slashes are replaced with dashes: `/` → `-`
   - The path is prefixed with `-` if it doesn't already start with one
   - Examples: 
     - `/Users/pascal/Code/backend` → `--Users-pascal-Code-backend`
     - `/home/user/project` → `--home-user-project`

3. **Sessions Index Lookup**: For each project directory, it looks for `sessions-index.json`:
   - If found, it reads entries and extracts session file paths
   - It tracks which sessions are indexed in a set called `indexed_sids`
   - **IMPORTANT (Fixed in commit b4bd968)**: It also globs for `.jsonl` files NOT yet in the index

4. **Session Files**: Sessions are stored as `<session-id>.jsonl` JSONL files

5. **Repository Filtering** (optional): If `repo_filter_path` is provided, only projects matching that repository path are included

### 2. **Session Key Format for Claude Sessions**

Session keys follow this format:
```
<source_system>:<session_id>
```

For Claude adapter:
- `source_system` = `"claude"`
- `session_id` = extracted from the JSONL filename stem
  - For subagents: if the filename is `agent-xyz123.jsonl`, the session_id becomes `xyz123` (prefix removed)

Example: `claude:a1b2c3d4-e5f6-g7h8-i9j0-k1l2m3n4o5p6`

### 3. **CWD (Current Working Directory) Filtering**

The filtering happens at **two levels**:

#### **Level 1: Peek and Filter** (engine.py, lines 128-137)
```python
peek = adapter.peek_session(source_path, source_system)
cwd = str(peek.get("cwd", ""))
if repo_filter_path and not _is_under_repo(cwd, repo_filter_path):
    result.filtered += 1
    continue
```

#### **Level 2: Post-Parse Filter** (engine.py, lines 155-157)
```python
if repo_filter_path and not _is_under_repo(session.cwd, repo_filter_path):
    result.filtered += 1
    continue
```

#### **The `_is_under_repo()` Function** (engine.py, lines 87-99):
```python
def _is_under_repo(cwd: str, repo_path: Path) -> bool:
    if not cwd:
        return False
    resolved_repo = repo_path.resolve()
    try:
        Path(cwd).resolve().relative_to(resolved_repo)
        return True
    except ValueError:
        cwd_parts = [part for part in Path(cwd).parts if part not in {"", "/"}]
        repo_name = resolved_repo.name
        if repo_name in cwd_parts:
            return True
        return False
```

This checks:
1. If the session's `cwd` is a subdirectory of the repo (using `relative_to()`)
2. If that fails, it checks if the repo name appears anywhere in the path parts

### 4. **How CWD is Extracted from Claude Sessions**

The CWD is found in the JSONL file itself (claude.py, lines 96-97, 119-120):

```python
if not cwd:
    cwd = obj.get("cwd", "")
```

The first user or assistant message that contains a `"cwd"` field sets the session's CWD. If no message has it, the session gets an empty CWD.

The `peek_session()` method (lines 191-232) tries to read it from:
1. `sessions-index.json` entry: `projectPath` field
2. First user/assistant message: `cwd` field

### 5. **Peek Session Logic** (Important for Understanding Filtering)

The `peek_session()` method performs **quick metadata extraction** without parsing the full session:

```python
def peek_session(self, source_path: Path, source_system: str) -> dict:
    # First: Check sessions-index.json for metadata
    # If found, return: session_id, session_key, cwd, started_at, fingerprint
    
    # If index entry not found: scan first line of JSONL
    # Extract: cwd, timestamp from first user/assistant message
    
    # Returns dict with: cwd, session_id, session_key, started_at, fingerprint
```

### 6. **Recent Important Fix** (Commit b4bd968 - Feb 22, 2026)

**Issue**: New Claude sessions written to disk after the last index update were silently skipped because `discover_files()` only looked at sessions listed in `sessions-index.json`.

**Fix**: Added fallback glob pattern (lines 182-184):
```python
# Also pick up any .jsonl files on disk not yet in the index
for p in sorted(project_dir.glob("*.jsonl")):
    if p.is_file() and p.stem not in indexed_sids:
        paths.append(p)
```

This ensures sessions that:
- Exist as `.jsonl` files on disk
- Are NOT yet in `sessions-index.json`
- Have a stem (filename) not already in `indexed_sids`

...are still discovered and processed.

### 7. **Sync Command Filtering Chain**

When running `convx sync` in a repo:

1. **Discover**: Find all Claude sessions in `~/.claude/projects/`
2. **Filter by repo**: Keep only projects matching current repo path
3. **Peek**: Extract CWD from each session
4. **Filter by CWD**: Keep only sessions whose CWD is under the current repo
5. **Parse**: Full session parsing
6. **Filter by CWD (again)**: Secondary check after parsing
7. **Filter by marker**: Skip if contains `CONVX_NO_SYNC` marker (by default)
8. **Export**: Write to `history/<user>/<source>/` in flat structure

### 8. **Potential Issues That Could Prevent Session Discovery**

Based on code analysis, Claude sessions from the current working directory might not be picked up due to:

1. **Missing `sessions-index.json`**: Sessions won't be discovered unless either:
   - `sessions-index.json` exists AND lists the session, OR
   - The `.jsonl` file exists on disk (post-fix b4bd968)

2. **Wrong project directory name**: If the encoded repo path doesn't match the directory name in `~/.claude/projects/`, sessions won't be found

3. **CWD mismatch**: Session's `cwd` field must be:
   - Set in the JSONL file, OR
   - Listed in `sessions-index.json` as `projectPath`
   - AND must match or be under the current repo being synced

4. **Empty CWD**: If a session has no CWD metadata, `_is_under_repo("")` returns `False`

5. **Subagent filtering**: Subagent sessions with `"isSidechain": true` in the index are explicitly skipped

6. **Fingerprint/File state**: Sessions marked with the skip marker (`CONVX_NO_SYNC`) are filtered

### 9. **Test Coverage**

Key tests verify:
- `test_claude_sync_filters_to_repo_and_subfolders`: Confirms CWD filtering works
- `test_claude_backup_is_idempotent`: Idempotency via fingerprint tracking
- Session folder structure with subagents

All absolute file paths referenced in this analysis:
- `/Users/pascal/Code/business/convx/src/convx_ai/adapters/claude.py`
- `/Users/pascal/Code/business/convx/src/convx_ai/engine.py`
- `/Users/pascal/Code/business/convx/src/convx_ai/cli.py`
- `/Users/pascal/Code/business/convx/src/convx_ai/models.py`
- `/Users/pascal/Code/business/convx/tests/test_integration_claude.py`
- `/Users/pascal/Code/business/convx/tests/test_integration_sync.py`
