Daily Log

Generate a daily work log from Claude Code and Codex session histories.

Workflow

1. Determine the target date (default: today)
2. Launch two helper subagents in parallel - one for Claude Code sessions, one for Codex sessions
3. Merge results chronologically and write the output file

Step 1: Find session files

Claude Code sessions:

find ~/.claude/projects -name "*.jsonl" -type f | while read f; do
  mod=$(stat -f "%Sm" -t "%Y-%m-%d" "$f" 2>/dev/null)
  if [ "$mod" = "TARGET_DATE" ]; then echo "$f"; fi
done | sort

Skip files under subagents/ directories - only read main session files.

Codex sessions:

~/.codex/sessions/YYYY/MM/DD/*.jsonl

Step 2: Launch parallel subagents

Launch two helper subagents simultaneously via the Task tool:

Subagent prompt template (adapt for Claude Code vs Codex):

Read each session JSONL file for TARGET_DATE. For each session extract:

1. Start time (from filename or first timestamp)
2. Project/working directory
3. User's initial prompt
4. Key actions (bugs filed, patches submitted, files edited, commands run)
5. Outcome (completed, interrupted, result)

Return a structured summary per session, ordered chronologically.

See references/jsonl-formats.md for the JSONL structure of each tool.

Step 3: Compile the log

Merge both subagent results into a single markdown file. Use the output format in references/output-format.md.

Save to: ~/moz_artifacts/daily-log-YYYY-MM-DD.md

Notes

• Focus on user prompts and high-level outcomes, not every tool call
• Sessions under 3 lines of user interaction can be summarized in one line
• If a session was interrupted before meaningful work, note it briefly
• Combine related sessions (same bug/task across multiple sessions) in the summary