drift

Detect when your AI agent's configuration has drifted from reality.

The Problem

You write a CLAUDE.md with rules and constraints. Sessions pass. Things change. But the config stays the same.

• "jq is not available" — but you installed it last week
• 5 tasks are "in progress" with no commits in 10 days
• 30 memory files exist that nobody indexes
• The latest handover is a week old

Your AI agent makes decisions based on stale instructions. Nobody notices.

Install

pip install drift-ai

Quick Start

# Auto-detect CLAUDE.md, ACTIVE_PLAN.md, memory dir
drift check

# Specify files explicitly
drift check --config CLAUDE.md --plan ACTIVE_PLAN.md

# Only warnings and errors
drift check --severity warning

# Machine-readable output
drift check --json

What It Checks

Check	What It Detects	Example
dead-ref	File paths in config that don't exist	IMPROVEMENT_PROTOCOL.md was moved
stale-env	Environment claims that are wrong	"jq is not available" but jq is installed
stale-task	In-progress tasks with no git activity	Task marked 🟠 for 2 weeks, zero commits
orphan-memory	Memory files not in any index	research.md exists but isn't in MEMORY.md
stale-handover	Handovers that are too old	Latest handover is 5 days ago
config-size	Config files that are too large	CLAUDE.md is 300 lines (costs tokens every session)

Example Output

WARNING CLAUDE.md:49 Claims 'Homebrew' is not available but found at /usr/local/bin/brew
INFO ACTIVE_PLAN.md:31 Task 'タイトル改善' is in progress but no related git activity in 7 days
INFO soul/memory/intelligence/metrics_tracker.md File not referenced in any index

3 issues: 1 warning, 2 info

Options

drift check
  --config PATH       Config file (default: auto-detect CLAUDE.md)
  --plan PATH         Plan file (default: auto-detect ACTIVE_PLAN.md)
  --memory-dir PATH   Memory directory
  --severity LEVEL    Minimum: error, warning, info (default: info)
  --json              Machine-readable output
  --no-color          Disable colors
  -q, --quiet         Minimal output

Exit Codes

• 0 — No errors
• 1 — Errors found

Born from Real Pain

This tool exists because:

• A product philosophy discussed in conversation was never recorded — discovered months later
• CLAUDE.md claimed "Homebrew is not available" for weeks after it was installed
• 30 intelligence files accumulated without being indexed, invisible to future sessions
• Tasks sat "in progress" for weeks with no one noticing

We built drift for ourselves first. Now it's yours.

Claude Code Plugin

Install drift as a Claude Code plugin (no pip required — skill invocable directly from Claude):

/plugin marketplace add uzucky/drift

Then invoke with /drift inside any Claude Code session.

License

MIT