🦐 Shrink — Three-Tier Multimodal Context Optimizer

Replace base64 images in session history with context-aware text descriptions, reducing image token cost by 96-99%. Use when: (1) user says /shrink, /shrink,...

This skill generally does what it claims: it finds base64 images in OpenClaw session JSONL files, sends the images plus surrounding conversation to an Anthropic vision model, and replaces the raw image blocks with three-tier text descriptions. Before installing or running it, consider the following: (1) Privacy: images and the surrounding messages (possibly containing PII, passwords, keys, or IPs) are sent to an external API. If that is unacceptable, do not run this skill or run it on copies of sessions with sensitive content removed. (2) Credentials on disk: the script may read auth-profiles.json to auto-discover Anthropic tokens for agents — review those files and prefer setting ANTHROPIC_API_KEY in the environment to prevent disk scanning. (3) Backups & testing: always run the --dry-run and keep .bak backups enabled; inspect the JSON output before committing. (4) Redaction: the '--redact' option relies on the remote model to remove secrets — that does not guarantee secrets are never transmitted. If you need strong guarantees, perform local redaction before using the skill. (5) Scope and restart: the skill writes session files in-place and can restart the gateway (global impact) — be prepared for brief downtime and confirm interactive prompts will be enforced in your deployment. (6) Code review: because this is an instruction-only install with a shipped script, review scripts/shrink.py yourself (or run in an isolated environment) to validate behavior and endpoints. If you want lower risk, run it only against targeted session files via --session-file or use an isolated agent account with no sensitive data.

Type: OpenClaw Skill Name: shrink Version: 1.2.0 The "shrink" skill is a utility designed to optimize OpenClaw session history by replacing large base64 image strings with concise, AI-generated text descriptions using the Anthropic Vision API. The core script (`scripts/shrink.py`) handles image processing, deduplication, and session file modification with safety features like automatic backups and optional PII redaction. All behaviors, including credential access to `auth-profiles.json` and the instruction to restart the gateway in `SKILL.md`, are transparently documented and strictly aligned with the tool's stated purpose of context optimization.