From claude-mods
Sends and receives messages between Claude Code sessions in different project directories via global SQLite database. Commands include read, send to project by git-hash ID, reply, broadcast, list, search, clear.
npx claudepluginhub 0xdarkmatter/claude-modsThis skill is limited to using the following tools:
Inter-session messaging for Claude Code. Send and receive pmail between sessions running in different projects.
Creates isolated Git worktrees for feature branches with prioritized directory selection, gitignore safety checks, auto project setup for Node/Python/Rust/Go, and baseline verification.
Executes implementation plans in current session by dispatching fresh subagents per independent task, with two-stage reviews: spec compliance then code quality.
Dispatches parallel agents to independently tackle 2+ tasks like separate test failures or subsystems without shared state or dependencies.
Inter-session messaging for Claude Code. Send and receive pmail between sessions running in different projects.
All commands go through MAIL, a shorthand for bash "$HOME/.claude/pigeon/mail-db.sh".
Set this at the top of execution:
MAIL="$HOME/.claude/pigeon/mail-db.sh"
Then use it for all commands below.
Parse the user's input after pigeon (or /pigeon) and run the matching command:
| User says | Run |
|---|---|
pigeon read | bash "$MAIL" read |
pigeon read 42 | bash "$MAIL" read 42 |
pigeon send <project> "<subject>" "<body>" | bash "$MAIL" send "<project>" "<subject>" "<body>" |
pigeon send --urgent <project> "<subject>" "<body>" | bash "$MAIL" send --urgent "<project>" "<subject>" "<body>" |
pigeon send --attach <path> <project> "<subject>" "<body>" | bash "$MAIL" send --attach "<path>" "<project>" "<subject>" "<body>" |
pigeon reply <id> "<body>" | bash "$MAIL" reply <id> "<body>" |
pigeon reply --attach <path> <id> "<body>" | bash "$MAIL" reply --attach "<path>" <id> "<body>" |
pigeon broadcast "<subject>" "<body>" | bash "$MAIL" broadcast "<subject>" "<body>" |
pigeon search <keyword> | bash "$MAIL" search "<keyword>" |
pigeon status | bash "$MAIL" status |
pigeon unread | bash "$MAIL" unread |
pigeon list | bash "$MAIL" list |
pigeon list 50 | bash "$MAIL" list 50 |
pigeon projects | bash "$MAIL" projects |
pigeon clear | bash "$MAIL" clear |
pigeon clear 7 | bash "$MAIL" clear 7 |
pigeon alias <old> <new> | bash "$MAIL" alias "<old>" "<new>" |
pigeon purge | bash "$MAIL" purge |
pigeon purge --all | bash "$MAIL" purge --all |
pigeon id | bash "$MAIL" id |
pigeon migrate | bash "$MAIL" migrate |
pigeon init | bash "$MAIL" init |
When the user just says "check mail", "read mail", "inbox", "any mail?", or "any pmail?" - run bash "$MAIL" read.
When the user says "send mail to X", "send pmail to X", or "message X" - parse out the project name, subject, and body, then run bash "$MAIL" send.
Each project gets a stable 6-character hash ID derived from its git root commit (the very first commit in the repo). This means:
For non-git directories, falls back to a hash of the canonical path (pwd -P).
Use pigeon id to see your project's name and hash:
claude-mods 7663d6
When sending messages, you can address projects by name, hash, or path - they all resolve to the same hash ID.
Each project hash renders as a unique pixel-art identicon (11x11 symmetric grid using Unicode half-block characters). Run identicon.sh to see yours, or view all projects with pigeon projects.
A global PreToolUse hook checks for pmail on every tool call (no cooldown). Silent when inbox is empty.
=== PMAIL: 3 unread message(s) ===
From: some-api | Auth endpoints ready
From: frontend | Need updated types
... and 1 more
Use pigeon read to read messages.
Send file references with --attach <path> (repeatable). Paths are resolved to absolute and stored as references - files are not copied.
# Send with one attachment
pigeon send --attach src/config.ts my-api "Config update" "Updated the auth config"
# Send with multiple attachments
pigeon send --attach src/schema.sql --attach docs/API.md my-api "Schema + docs" "See attached"
# Reply with attachment
pigeon reply --attach output/report.json 42 "Here's the analysis"
Recipients see attachment paths with file sizes and can read them directly with the Read tool. If a file has been moved or deleted since sending, it shows as (missing).
touch .claude/pigeon.disable # Disable hook notifications
rm .claude/pigeon.disable # Re-enable
Only the hook is disabled - you can still send messages from the project.
Pigeon requires two things: scripts (the mail engine) and a hook (passive notifications). Both install globally - one setup, every project gets pmail.
sqlite3 - ships with macOS, most Linux distros, and Git Bash on Windows. No install needed.mkdir -p ~/.claude/pigeon
cp skills/pigeon/scripts/mail-db.sh ~/.claude/pigeon/
cp hooks/check-mail.sh ~/.claude/pigeon/
chmod +x ~/.claude/pigeon/mail-db.sh ~/.claude/pigeon/check-mail.sh
This gives you the pmail commands. You can now send and read messages manually:
bash ~/.claude/pigeon/mail-db.sh init # Create database
bash ~/.claude/pigeon/mail-db.sh status # Check it works
Add a hooks block to ~/.claude/settings.json. This makes Claude check for pmail automatically on every tool call:
{
"hooks": {
"PreToolUse": [
{
"matcher": "*",
"hooks": [
{
"type": "command",
"command": "bash \"$HOME/.claude/pigeon/check-mail.sh\"",
"timeout": 5
}
]
}
]
}
}
Important: If you already have a hooks section in your settings, merge the PreToolUse entry into the existing array - don't replace the whole block.
Without this step, pigeon still works but you have to check manually (pigeon read). With the hook, unread pmail appears automatically.
~/.claude/
settings.json # Hook config (you edit this)
pmail.db # Message store (auto-created on first use)
pigeon/
mail-db.sh # All pmail commands (send, read, reply, etc.)
check-mail.sh # PreToolUse hook (silent when inbox empty)
# Check your project identity
bash ~/.claude/pigeon/mail-db.sh id
# Send yourself a test message (use your project name from above)
bash ~/.claude/pigeon/mail-db.sh send "my-project" "Test" "Hello from pigeon"
# Check it arrived
bash ~/.claude/pigeon/mail-db.sh read
# Clean up
bash ~/.claude/pigeon/mail-db.sh purge --all
rm -rf ~/.claude/pigeon ~/.claude/pmail.db
# Then remove the hooks.PreToolUse entry from ~/.claude/settings.json
Single SQLite file at ~/.claude/pmail.db. Auto-created on first init or send.
CREATE TABLE messages (
id INTEGER PRIMARY KEY AUTOINCREMENT,
from_project TEXT NOT NULL, -- 6-char hash ID
to_project TEXT NOT NULL, -- 6-char hash ID
subject TEXT DEFAULT '',
body TEXT NOT NULL,
timestamp TEXT DEFAULT (datetime('now')),
read INTEGER DEFAULT 0,
priority TEXT DEFAULT 'normal'
);
CREATE TABLE projects (
hash TEXT PRIMARY KEY, -- 6-char ID (git root commit or path hash)
name TEXT NOT NULL, -- Display name (basename of project dir)
path TEXT NOT NULL, -- Canonical path
registered TEXT DEFAULT (datetime('now'))
);
| Issue | Fix |
|---|---|
sqlite3: not found | Ships with macOS, Linux, and Git Bash on Windows. Run sqlite3 --version to check. |
| Hook not firing | Ensure hooks block is in ~/.claude/settings.json (Step 2 above) |
| Hook fires but no notification | Working as intended - hook is silent when inbox is empty |
| Messages not arriving | Target must be a known name, hash, or path. Use pigeon projects to see registered projects |
| Upgraded from basename IDs | Run pigeon migrate to convert old messages to hash-based IDs |
| Changed display name | Use pigeon alias old-name new-name to update the project's display name |
| Want to disable for one project | touch .claude/pigeon.disable in that project's root |
| Check your project ID | Run pigeon id to see name and 6-char hash |