Maintenance

Periodic housekeeping skill for Harness projects. Handles stale state file removal, plugin cache purging, and orphaned worktree cleanup.

Quick Reference

Subcommand	What It Does
--clear-state	Remove stale files from .claude/state/
--purge-cache	Clear the plugin cache from ~/.claude/plugins/cache/
--clean-worktrees	Remove git worktrees with no associated branch
--all	Run all of the above in sequence

When to Use

Run /maintenance when any of the following apply:

• .claude/state/ contains loop-active.json but no loop is running
• Old sprint contracts from completed phases are cluttering .claude/state/contracts/
• git worktree list shows entries for branches that have been deleted
• The plugin cache has grown stale after a Harness version upgrade

Operations

--clear-state

Scans .claude/state/ and removes files that are safe to delete:

• loop-active.json — only if no Breezing/harness-work loop is currently running
• Sprint contract files (*.sprint-contract.json) for tasks marked cc:Done in Plans.md
• Stale review-result.json files older than 7 days

Will not touch: Active loop state, pending fix proposals, or the contracts/ directory itself.

--purge-cache

Removes the plugin cache directory at ~/.claude/plugins/cache/. The cache is rebuilt automatically on next plugin load. Use after a major Harness version upgrade if stale cached files are causing unexpected behavior.

--clean-worktrees

Lists all git worktrees (git worktree list) and removes entries where the associated branch no longer exists in the repository.

Safe: uses git worktree remove --force only on worktrees confirmed to have no live branch.

Safety Guarantees

• All operations print a dry-run summary before making changes
• Destructive operations (--purge-cache) require explicit confirmation
• Operations never touch files outside their defined scope
• The main working tree is never modified

Execution Details

See ${CLAUDE_SKILL_DIR}/references/cleanup.md for step-by-step execution procedures for each subcommand.

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Session Lifecycle

Consolidates session-related subcommands: listing, inbox checks, and broadcasting.

User Input	Behavior
session list	Show all active Claude Code sessions in the current project
session inbox	Check for incoming messages from other sessions
session broadcast "message"	Send a message to all active sessions

session list

Shows all active Claude Code sessions in the current project.

Active Sessions

| Session ID | Status | Last Activity |
|------------|--------|---------------|
| abc123     | active | 2 min ago     |
| def456     | idle   | 15 min ago    |

session inbox

Checks for incoming messages from other sessions.

Session Inbox

| From   | Time    | Message            |
|--------|---------|---------------------|
| abc123 | 5m ago  | "Ready for review"  |

session broadcast "message"

Sends a message to all active sessions.

For memory optimization, session lifecycle details, and state transitions, see:

• references/session-control.md
• references/memory-optimization.md
• references/execution-flow.md

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Related Skills

• harness-plan archive — Archive completed phases from Plans.md (not the same as maintenance)
• harness-work — Implementation; run maintenance before long breezing sessions