Claude-skill-registry extract-transcripts

Extract readable transcripts from Claude Code and Codex CLI session JSONL files

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/extract-transcripts" ~/.claude/skills/majiayu000-claude-skill-registry-extract-transcripts && rm -rf "$T"

manifest: skills/data/extract-transcripts/SKILL.md

source content

Extract Transcripts

Extracts readable markdown transcripts from Claude Code and Codex CLI session JSONL files.

Scripts

Claude Code Sessions

# Extract a single session
uv run ~/.claude/skills/extract-transcripts/extract_transcript.py <session.jsonl>

# With tool calls and thinking blocks
uv run ~/.claude/skills/extract-transcripts/extract_transcript.py <session.jsonl> --include-tools --include-thinking

# Extract all sessions from a directory
uv run ~/.claude/skills/extract-transcripts/extract_transcript.py <directory> --all

# Output to file
uv run ~/.claude/skills/extract-transcripts/extract_transcript.py <session.jsonl> -o output.md

# Summary only (quick overview)
uv run ~/.claude/skills/extract-transcripts/extract_transcript.py <session.jsonl> --summary

# Skip empty/warmup-only sessions
uv run ~/.claude/skills/extract-transcripts/extract_transcript.py <directory> --all --skip-empty

Options:

```
--include-tools
```
: Include tool calls and results
```
--include-thinking
```
: Include Claude's thinking blocks
```
--all
```
: Process all .jsonl files in directory
```
-o, --output
```
: Output file path (default: stdout)
```
--summary
```
: Only output brief summary
```
--skip-empty
```
: Skip empty and warmup-only sessions
```
--min-messages N
```
: Minimum messages for --skip-empty (default: 2)

Codex CLI Sessions

# Extract a Codex session
uv run ~/.claude/skills/extract-transcripts/extract_codex_transcript.py <session.jsonl>

# Extract from Codex history file
uv run ~/.claude/skills/extract-transcripts/extract_codex_transcript.py ~/.codex/history.jsonl --history

Session File Locations

Claude Code

Sessions:

~/.claude/projects/<project-path>/<session-id>.jsonl

Codex CLI

Sessions:

~/.codex/sessions/<session_id>/rollout.jsonl

History:
```
~/.codex/history.jsonl
```

DuckDB-Based Transcript Index

For querying across many sessions, use the DuckDB-based indexer:

# Index all sessions (incremental - only new/changed files)
uv run ~/.claude/skills/extract-transcripts/transcript_index.py index

# Force full reindex
uv run ~/.claude/skills/extract-transcripts/transcript_index.py index --full

# Limit number of files to process
uv run ~/.claude/skills/extract-transcripts/transcript_index.py index --limit 10

# List recent sessions
uv run ~/.claude/skills/extract-transcripts/transcript_index.py recent
uv run ~/.claude/skills/extract-transcripts/transcript_index.py recent --limit 20
uv run ~/.claude/skills/extract-transcripts/transcript_index.py recent --project myapp
uv run ~/.claude/skills/extract-transcripts/transcript_index.py recent --since 7d

# Search across sessions
uv run ~/.claude/skills/extract-transcripts/transcript_index.py search "error handling"
uv run ~/.claude/skills/extract-transcripts/transcript_index.py search "query" --cwd ~/myproject

# Show a session transcript
uv run ~/.claude/skills/extract-transcripts/transcript_index.py show <file_path>
uv run ~/.claude/skills/extract-transcripts/transcript_index.py show <file_path> --summary

Requirements: uv (dependencies auto-installed via inline script metadata)

Database location:

~/.claude/transcript-index/sessions.duckdb

Output Format

Transcripts are formatted as markdown with:

Session metadata (date, duration, model, working directory, git branch)
User messages prefixed with
```
## User
```
Assistant responses prefixed with
```
## Assistant
```
Tool calls in code blocks (if --include-tools)
Thinking in blockquotes (if --include-thinking)
Tool usage summary for Codex sessions