Scripts and Tools

Collection of tools and scripts made for personal use

extend-loop

A Python script for extending audio files by looping a specific section until a target duration is reached. Perfect for creating hour-long ambient music from shorter tracks.

The script takes an audio file and:

1. Plays the beginning up to the loop start point
2. Repeatedly loops a specified section until the minimum length is reached
3. Plays the remainder of the original file after the loop end point

Preserves the original codec and bitrate when possible. Supports flexible time formats (e.g., 1:30.5, 90s, 1h).

Usage:

./bin/extend-loop -i input.mp3 --loop-start 0:18.744 --loop-end 1:52.563 --min-length 1h --output extended.mp3

transcribe-audio

Transcribes an audio file using mlx-whisper on Apple Silicon, with mlx-community/whisper-large-v3-turbo. Live-prints each segment with timestamps as it decodes, and writes .txt, .vtt, .srt, .tsv, and .json files next to the input.

Usage:

transcribe-audio path/to/audio.mp3 --lang en
transcribe-audio path/to/audio.mp3 --lang ja

diarize-audio

Speaker diarization with pyannote.audio 4.x (pyannote/speaker-diarization-community-1). Prints start end speaker ranges to stdout and writes an .rttm file next to the input. Optional --num-speakers / --min-speakers / --max-speakers hints improve quality when the count is known. Requires accepting the model license on HuggingFace once and setting HF_TOKEN (or HUGGINGFACE_TOKEN) to a read token.

Usage:

export HF_TOKEN=hf_xxxxxxxxxxxx
diarize-audio path/to/audio.mp3
diarize-audio path/to/audio.mp3 --num-speakers 2

is-mic-on / is-camera-on

Swift utilities to check if the microphone or camera is currently in use on macOS. Returns exit code 0 if in use, 1 if not. Use -q for quiet mode (exit code only).

claude-history

A Ruby CLI tool for browsing Claude Code conversation histories from ~/.claude/projects/. A session is one JSONL file: the tool resolves a session id to that file and prints it as a readable transcript, in the order Claude Code wrote it, so the output matches the file line for line — where a session was reverted and continued, the abandoned attempt and the retry both appear. Lines Claude Code writes for its own bookkeeping are counted rather than printed, and any line the tool cannot read is reported under the transcript.

Usage:

claude-history projects                              # List all projects
claude-history sessions --project myproject          # List a project's session files
claude-history show-session SESSION_ID               # Print a transcript
claude-history show-session SESSION_ID --verbose     # …with thinking, full tool output, metadata
claude-history show-session ID --subagent AGENT_ID   # Print a subagent's own transcript
claude-history show-session path/to/session.jsonl    # Print a session file from anywhere
claude-history sessions-updated-on 2026-04-12        # Find sessions by date
claude-history check-format                          # Report format drift across all files

A session id is matched by prefix, and searched across all projects unless --project narrows it. A path to an existing file opens that file instead, so a session copied out of ~/.claude/projects reads the same as one still in it. Subagents are reached through the session that spawned them: every Agent call names the agent it ran, and each transcript ends with the commands that open what the view left out.

format-md

Formats markdown files in-place. Wraps prose paragraphs and list items at 80 columns (preserving list continuation indent), leaves fenced and indented code blocks alone, and never splits inline backtick spans. Pads table columns to uniform width, wraps wide tables in <!-- markdownlint-disable MD013 --> comments, and removes the wrapper from tables that no longer need it. All width calculations are Unicode display-width aware (CJK and emoji count as 2 columns). Finally runs markdownlint-cli2 --fix for general cleanup. Tables that fail to parse are left untouched.

Usage:

format-md file1.md file2.md

joplin

A Ruby CLI for the Joplin note-taking app that communicates with Joplin's REST API. Supports listing notebooks/notes, searching, creating and managing notes/folders, adding and removing tags, and updating note content and metadata.

Usage:

export JOPLIN_TOKEN=your_token_from_joplin_settings
joplin folders                              # List all notebooks
joplin search "query"                       # Search notes
joplin create-note <folder-id> "Title" "Body"  # Create note

with-secure-env

A CLI tool for launching processes with encrypted environment variables. Stores secrets securely in the macOS Keychain and prompts for approval before injection, preventing plain-text .env files from being scattered around the filesystem. Available in both Go and Ruby implementations.

Usage:

with-secure-env init                      # Generate and store encryption key
with-secure-env edit /path/to/app         # Edit envs for an application
with-secure-env launch /path/to/app args  # Launch with injected envs

worktime

Command-line tool for tracking work sessions, breaks, and lunch to generate timesheet data for employer reporting. Records start/stop events and automatically calculates daily and monthly work hours with overtime tracking.

Usage:

worktime start              # Start a work session
worktime stop               # End work
worktime lunch              # Toggle lunch break
worktime status [DATE]      # Show current status
worktime month [MONTH]      # Show monthly overview with overtime

claude-chat-pdf-export

Exports a Claude.ai conversation as a printable PDF. Two pieces:

• A Chrome extension that adds a floating "PDF" button to any claude.ai/chat/* page. Clicking it opens a print-ready tab; pick Save as PDF from Chrome's print dialog.
• A Node CLI (render.mjs) that turns a conversation JSON into a standalone HTML file, ready to feed into chrome --headless --print-to-pdf for unattended export.

Both share the same renderer, which lays out text, thinking, tool_use, and tool_result blocks with print-friendly CSS.

Usage (extension):

cd src/claude-chat-pdf-export && npm install && npm run build
# then chrome://extensions → Developer mode → Load unpacked →
#   src/claude-chat-pdf-export/extension

Usage (CLI):

cd src/claude-chat-pdf-export && npm install
node render.mjs path/to/conv.json path/to/out.html
"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" \
  --headless --disable-gpu --no-pdf-header-footer \
  --print-to-pdf=out.pdf "file://$PWD/out.html"

md-render

A single-page Markdown renderer. Split view: paste/edit Markdown on the left, see it rendered with GitHub-style typography on the right. Each pane scrolls independently. Pick from a few themes (GitHub Light, GitHub Dark, a serif Reading theme, Solarized Light) and use the browser's print dialog to save the rendered side as PDF. Content and theme persist in localStorage so the page survives reloads. Runs from a single HTML file with CDN-loaded marked, highlight.js, and github-markdown-css.

Usage:

md-render            # opens src/md-render/index.html in your default browser

hammerspoon-spoons/

Custom Hammerspoon Spoons for macOS automation.