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Compress oversized Claude Code session files to prevent crashes and recover disk space. Uses the claude-session-optimizer tool from GitHub (javimosch/claude-session-optimizer).
デフォルトでは、最初にソースを確認する Prompt が選択されています。直接コマンドに切り替えるか、ローカルコピーをダウンロードすることもできます。
インストールを決める前に、SKILL.md と SkillsMP に表示されている付属ファイルをお読みください。
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
直接コマンドでは確認用 Prompt が省略されます。実行前にソースを確認してください。
npx skills add https://github.com/javimosch/supercli --skill claude-session-optimizerコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
ローカルで確認しますか？SkillsMP が現在取得できるファイルをダウンロードできます。
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SOC 職業分類に基づく
SKILL.md を表示中
| name | claude-session-optimizer |
| description | Compress oversized Claude Code session files to prevent crashes and recover disk space. Uses the claude-session-optimizer tool from GitHub (javimosch/claude-session-optimizer). |
Claude Code sessions (~/.claude/projects/*/*.jsonl) grow unbounded. Once a session exceeds ~75 MB, Claude crashes on load. This tool compresses them back to < 50 MB while keeping conversation history intact.
# First-time: sync latest plugins, install, and run health check
sc plugins update && sc plugins install claude-session-optimizer
sc claude-session-optimizer self auto
The auto command auto-installs the optimizer (cached), scans all sessions, reports oversized ones, and tells you how to compress. Never modifies files — safe to run anytime.
Note for npx users: Replace
scwithnpx superacli. Theplugins updatecommand fetches the latest plugin catalog directly from GitHub — no npm publish needed.
# List all sessions with sizes
sc claude-session-optimizer self list
# Compress all sessions over 50 MB
sc claude-session-optimizer self compress
# Preview savings (no writes)
sc claude-session-optimizer self dry-run
# Target a specific session
sc claude-session-optimizer self file --path ~/.claude/projects/-my-project/uuid.jsonl
# Custom threshold (e.g., 30 MB)
sc claude-session-optimizer self compress-threshold --threshold 30
| Component | Why | Typical savings |
|---|---|---|
| thinking blocks | Internal reasoning (not needed to continue) | ~11 MB |
| file-history-snapshots | Undo history (auto-rebuilt) | ~17 MB |
| pr-link, queue-operation | Redundant metadata | ~1 MB |
| tool_result (large) | Command output → [truncated: N B] | ~3 MB |
| tool_use input (large) | Tool args → tool name + size note | ~4 MB |
Kept: user messages, assistant text, attachments/goals, system prompts, last-prompt, mode markers.
mkdir -p ~/.local/bin
curl -sL https://raw.githubusercontent.com/javimosch/claude-session-optimizer/main/compress-claude-session.py -o ~/.local/bin/compress-claude-session
chmod +x ~/.local/bin/compress-claude-session
Or run directly without installing:
python3 <(curl -sL https://raw.githubusercontent.com/javimosch/claude-session-optimizer/main/compress-claude-session.py) --list
.bak backup before modifying any file--dry-run to preview