Claude Code Session Commands: Beat Context Rot with Smart Session Management

Key Takeaways

• Context rot begins at roughly 300,000–400,000 tokens — not because the window is full, but because older tokens dilute attention on the current task. Anthropic's own user research confirmed this threshold.
• The 1M token context window is a double-edged sword: longer autonomous sessions are possible, but unmanaged sessions degrade silently — Claude produces confident but increasingly off-target responses.
• /clear resets the session entirely: fastest and cheapest option, best when moving to an unrelated task or after a major error. /compact summarizes the current context into a compressed form, preserving what matters while shedding noise.
• Checkpoints let you save session state mid-task. When you restart from a checkpoint, Claude has focused context instead of an empty slate — critical for long multi-stage projects.
• The deliberate session hygiene pattern: use /compact every 200K tokens on long tasks, /clear between major context shifts, and checkpoints before risky operations (large refactors, destructive changes).

What Context Pollution Actually Looks Like

Bart demos the degradation pattern live: a session that starts with crisp, accurate responses begins producing responses that reference earlier (now-irrelevant) context, re-explaining things already established, or making decisions that contradict earlier conclusions. The model isn't broken — it's attending to too many signals at once.

Anthropic's internal finding: the degradation is highly task-dependent. Simple tasks (file edits, grep, one-shot code generation) are barely affected even at 800K tokens. Complex tasks (architectural decisions, multi-file refactors, debugging subtle logic) degrade noticeably at 300K.

Session Command Reference

• /clear — Wipes the entire session context. Free to use. Best between unrelated tasks or after hitting a wall.
• /compact — Summarizes current context into a condensed form. Costs a small amount of tokens to generate the summary, but typically reduces context size by 60–80%.
• Checkpoint (save) — Snapshots the current session state. Use before destructive operations or at natural task milestones.
• Checkpoint (restore) — Returns to a saved state. Useful if a long agentic run goes off the rails and you need to rewind without starting from zero.

Related on OpenClawDatabase

• Claude Cowork Setup Guide — getting started with Claude's broader environment
• OpenClaw Configuration — context management strategies across agent platforms