786762587d
Stale/max-wait takeover was not safe against concurrent breakers: two
breakers could both judge the lock stale and both proceed, re-introducing
the tight-loop. POSIX/Node has no content- or inode-conditional unlink or
rename, so "judge stale, then replace" can never be atomic with pure path
ops.
Serialize ALL lock transitions (acquire, release, takeover) under one
short-lived registry mutex held only across a few fs ops, never across the
restart itself. This makes check-then-mutate atomic, so exactly one breaker
can take over a stale lock while the others wait and re-evaluate.
The mutex itself uses mtime-based staleness (open('wx') creates an empty
inode before the token is written; a content check would reap a lock that is
still being acquired). The mutex populates-or-cleans-up on write failure so a
half-created mutex never leaks.
Regression coverage at two widths: a 2-breaker barrier test (exactly one
takes over, the other waits) and the existing 3-breaker test (maxActive===1,
distinct tokens, final lock released).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
@mosaicstack/mosaic
CLI package for the Mosaic self-hosted AI agent platform.
Usage
mosaic wizard # First-run setup wizard
mosaic gateway install # Install the gateway daemon
mosaic config show # View current configuration
mosaic config hooks list # Manage Claude hooks
Headless / CI Installation
Set MOSAIC_ASSUME_YES=1 (or ensure stdin is not a TTY) to skip all interactive prompts. The following environment variables control the install:
Gateway configuration (mosaic gateway install)
| Variable | Default | Required |
|---|---|---|
MOSAIC_STORAGE_TIER |
local |
No |
MOSAIC_GATEWAY_PORT |
14242 |
No |
MOSAIC_DATABASE_URL |
(none) | Yes if tier=team |
MOSAIC_VALKEY_URL |
(none) | Yes if tier=team |
MOSAIC_ANTHROPIC_API_KEY |
(none) | No |
MOSAIC_CORS_ORIGIN |
http://localhost:3000 |
No |
Admin user bootstrap
| Variable | Default | Required |
|---|---|---|
MOSAIC_ADMIN_NAME |
(none) | Yes (headless) |
MOSAIC_ADMIN_EMAIL |
(none) | Yes (headless) |
MOSAIC_ADMIN_PASSWORD |
(none) | Yes (headless) |
MOSAIC_ADMIN_PASSWORD must be at least 8 characters. In headless mode a missing or too-short password causes a non-zero exit.
Example: Docker / CI install
export MOSAIC_ASSUME_YES=1
export MOSAIC_ADMIN_NAME="Admin"
export MOSAIC_ADMIN_EMAIL="admin@example.com"
export MOSAIC_ADMIN_PASSWORD="securepass123"
mosaic gateway install
Hooks management
After running mosaic wizard, Claude hooks are installed in ~/.claude/hooks-config.json.
mosaic config hooks list # Show all hooks and enabled/disabled status
mosaic config hooks disable PostToolUse # Disable a hook (reversible)
mosaic config hooks enable PostToolUse # Re-enable a disabled hook
Set CLAUDE_HOME to override the default ~/.claude directory.