pi-daily-journal

A pi extension that turns your day's pi coding sessions into a natural-language diary entry.

It scans all of pi's stored sessions, finds the ones from a given day, extracts a token-efficient digest (only your prompts and the assistant's text replies — no thinking blocks, tool-call args, tool results, or images), and asks the current agent to write a clean Markdown diary into your chosen output folder.

Great for keeping an Obsidian-style daily journal of what you worked on.

Features

• 🗓️ Summarize today (/daily) or any specific day (/daily 2026-07-08).
• 🔎 Scans every session folder under pi's sessions directory automatically.
• 💰 Token-efficient: streams each .jsonl line-by-line and keeps only user/assistant text, dropping reasoning, tool calls, tool results, and images. Per-session caps keep the digest small.
• 🚫 Excludes sessions whose working directory is your journal folder itself, so the diary doesn't summarize its own generation.
• 🌏 Matches days by your local date (session filenames are UTC timestamps and are converted before comparison).
• ⚙️ Simple config: input dir, output dir, and journal language.
• 🌐 Write your journal in any language (English, 中文, …) via the language option.
• ⌨️ Argument autocompletion suggests the last 7 days.

Install

# From GitHub (replace with your repo if you fork it)
pi install git:github.com/daviddong/pi-daily-journal

# Or try it for a single run without installing
pi -e git:github.com/daviddong/pi-daily-journal

# Or from a local checkout
pi install /path/to/pi-daily-journal

To remove:

pi remove git:github.com/daviddong/pi-daily-journal

Usage

Open pi in the folder where you keep your journal (for example an Obsidian daily notes folder), then run:

/daily                # summarize today
/daily 2026-07-08     # summarize a specific day (YYYY-MM-DD)

The extension gathers the day's sessions, builds a compact digest, and hands it to the current agent with instructions to write <outputDir>/<date>.md. The file is overwritten on each run; if the file already exists, its contents are passed to the agent so any manual notes you added can be preserved.

Typing /daily and triggering completion will suggest the last 7 days.

Configuration

Configuration is intentionally minimal — three fields:

Field	Meaning	Default
inputDir	Directory containing pi session folders (each with .jsonl).	~/.pi/agent/sessions
outputDir	Where the daily YYYY-MM-DD.md files are written.	current working directory
language	Language the journal is written in (e.g. English, 中文).	English

~ is expanded to your home directory. A relative outputDir is resolved against the current working directory; an empty outputDir means "write into the current working directory".

Config is read from (later overrides earlier):

1. Built-in defaults
2. ~/.pi/agent/daily-journal.json (global)
3. <cwd>/.pi/daily-journal.json (project-local, only when the project is trusted)

Example ~/.pi/agent/daily-journal.json:

{
  "inputDir": "~/.pi/agent/sessions",
  "outputDir": "~/Documents/daily",
  "language": "中文"
}

Leaving outputDir empty writes the diary into whatever folder you launched pi in.

How it works

Each pi session is stored as ~/.pi/agent/sessions/<encoded-cwd>/<UTC-timestamp>_<uuid>.jsonl. This extension:

1. Iterates over every session folder in inputDir.
2. Parses the UTC timestamp from each filename and converts it to your local date; keeps files matching the target day.
3. Streams each matching file line-by-line, reading the first session entry for its cwd and collecting only user/assistant text blocks (capped per session).
4. Skips any session whose cwd equals your current journal folder.
5. Renders a compact grouped digest and sends it to the agent with a prompt to write the diary file.

License

MIT