Use when the user wants to critically analyze a book's arguments, find weaknesses, evaluate evidence quality, or understand a book's intellectual context and gaps
Supported book formats: .txt, .pdf, .md. For other formats (EPUB, MOBI), ask the user to convert to text first.
Produce a critical analysis of a book's arguments — what's strong, what's weak, what's missing, and where it sits in the broader intellectual landscape. This is evaluation, not summary.
This skill reads 01_comprehension.md from the book's output directory to ground the critique in what the book actually says. If it doesn't exist:
book_review/ directory exists next to the book file.01_comprehension.md is missing, tell the user: "I need to summarize the book first to ground the critique. Run the comprehension stage?" Wait for confirmation before proceeding.book_review/ in the same directory as the book file.01_comprehension.md02_critical_analysis.md already exists. If it does, ask the user whether to overwrite or skip.02_critical_analysis.md following the output format below.Write 02_critical_analysis.md in this structure:
# Critical Analysis: [Book Title]
## Strongest Arguments
- **[argument]** — [why it's strong, what evidence supports it]
## Weakest Arguments
- **[argument]** — [why it's weak, what's missing or unconvincing]
## Rhetoric Over Evidence
- [where the author relies on rhetoric, analogy, or assertion rather than evidence]
## Gaps and Silences
- [what the book conspicuously ignores, counterarguments not addressed, evidence that would undermine the thesis]
## Intellectual Context
[How this book relates to other thinkers in the field. Who agrees, who disagrees, where it sits in the broader debate.]
## Temporal Lens
[What has happened since publication that validates, undermines, or recontextualizes the argument. Has the field moved on? Were predictions confirmed?]
## Audience and Purpose
[Who the book is written for. Does it succeed on its own terms?]
## Interesting Threads
- [underexplored ideas, surprising implications the author doesn't draw out, moments where the author is more interesting than they realize]