summarizer

Rules for orchestrators handling sub-agent results without lossy re-summarization. Activates when receiving agent output, relaying research results, passing data between agents, or combining agent findings. Prevents the failure mode where 'not found' becomes 'doesn't exist' and counts get dropped.

Summarize files by reading content, extracting key passages, and applying type-specific strategies. Activates on summarize this file, what's in this file, describe this codebase, file summary, analyze this file, tl;dr this file, what does this code do, explain this config, break down this script. Routes to strategies for code, config, data, documentation, markup, and binary files based on extension and word count.

Describe images and screenshots by viewing content with multimodal Read tool and documenting only visible elements. Activates on what's in this image, describe this screenshot, summarize this diagram, image summary, what does this screenshot show, explain this diagram, break down this chart. Handles UI screenshots, architecture diagrams, charts, photos, code screenshots, and terminal output. Never infers from filenames.

Combines multiple summaries into coherent synthesis. Activates when user requests combine these summaries, synthesize results, merge findings, or multi-source synthesis. This is the reduce step after individual sources have been summarized. Enforces deduplication, conflict surfacing, confidence scoring across sources, and attribution to all sources.

Route summarization requests to the correct methodology and enforce fidelity rules. Activates on summarize, tl;dr, give me the highlights, what's important in this, break down this, what does this code do, explain this file, describe this image, read and summarize. Routes files, URLs, images, and multi-source content to type-specific strategies. Enforces anti-hallucination rules — read before summarizing, extract before abstracting, preserve counts, distinguish absence from nonexistence, prevent lossy re-summarization chains.

Summarize web content by fetching URLs, extracting key passages with quote-grounding, and producing structured output. Activates on summarize this URL, what does this page say, summarize this article, read and summarize, summarize the documentation at, tl;dr this link, give me the highlights of this page, what's important on this site. Routes to fetching strategy based on content type — documentation, articles, API references, READMEs. Reports partial accessibility explicitly.