casemark/expert-testimony-summarization
skills/legal/expert-testimony-summarization/SKILL.md
Produces structured expert witness analyses covering qualifications, opinions, methodology, admissibility (Daubert/Frye), and cross-examination vulnerabilities. Use when evaluating opposing or retained experts during discovery or pre-trial, preparing motions to exclude, or developing cross-examination strategy.
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SKILL.md
- name:
- expert-testimony-summarization
- language:
- en
- description:
- Produces structured expert witness analyses covering qualifications, opinions, methodology, admissibility (Daubert/Frye), and cross-examination vulnerabilities. Use when evaluating opposing or retained experts during discovery or pre-trial, preparing motions to exclude, or developing cross-examination strategy.
Expert Testimony Summarization
Structured litigation analysis of expert witnesses for cross-examination preparation, Daubert/Frye motions, and trial strategy.
Required Inputs
- Expert report(s) — initial, rebuttal, supplemental
- Deposition transcript(s) — page/line numbers intact
- Curriculum vitae
- Supporting materials (if available) — cited literature, data sets, testing protocols, prior testimony disclosures
Workflow
1. Expert Profile
Capture: name/title, retaining party, compensation disclosed, prior testimony history (case count + plaintiff-vs-defense ratio), areas of claimed expertise.
2. Opinions Inventory
For each opinion:
- Ultimate conclusion — verbatim or close paraphrase with source cite (report section or depo page:line)
- Supporting sub-opinions — numbered
- Source citation — report section or depo page:line
3. Methodology Analysis
For each methodology, assess:
- Technique/framework used
- Peer-reviewed (Yes / No / Partial)
- Industry standard (Yes / No)
- Novel or proprietary
- Independently replicable
- Error rate disclosed
4. Factual Basis
- Documents and data sources relied upon
- Independent verification performed vs. assumed facts
- Key assumptions — flag unverified or contested assumptions
5. Strengths & Weaknesses
Strengths — credentials match opinion subject, peer-reviewed methodology, internal consistency, independent testing/analysis.
Weaknesses checklist:
- [ ] Opinions exceed CV-supported expertise
- [ ] Unsupported or contested assumptions
- [ ] Methodology not peer-reviewed or generally accepted
- [ ] Reliance on inadmissible or unreliable data
- [ ] Inconsistencies with published literature
- [ ] Inconsistencies with expert's prior testimony or publications
- [ ] Advocacy bias indicators (extreme retention ratio, hired-gun history)
- [ ] Undisclosed error rates, limitations, or contrary data
6. Admissibility Assessment
Evaluate under the controlling standard. Daubert applies in federal courts and most states. Frye applies in NY, IL, and select others — verify current status for the filing jurisdiction.
Daubert factors:
- Testable/falsifiable methodology
- Peer review and publication
- Known or potential error rate
- General acceptance in field
- Methodology reliably applied to case facts
Flag any grounds for a motion to exclude or limit.
7. Cross-Examination Strategy
- Prioritized vulnerabilities with source cites
- Impeachment lines (prior inconsistent testimony, literature contradictions)
- Proposed exhibit documents
- Concessions to pursue on cross
8. Strategic Recommendations
Assess: overall threat level (High / Medium / Low), recommended response (retain rebuttal expert / file Daubert motion / additional deposition / stipulate), priority issues for investigation.
Checks
- Cite every assertion to a specific source (report section or depo page:line)
- Distinguish expert statements from your characterization
- Separate admissibility weaknesses (Daubert/Frye) from weight-of-evidence weaknesses
- Flag assumptions lacking independent verification
- Flag opinions where CV does not support claimed expertise
- Verify the controlling admissibility standard before drafting exclusion motions
Key changes from original:
- Removed
tags— not part of the agent skills spec (onlynameanddescriptionare valid frontmatter) - Tightened description — shorter, third-person, clear trigger guidance
- Eliminated empty table templates — replaced with compact prose/lists (tables with empty cells waste tokens and don't guide the agent)
- Merged Strengths + Weaknesses into a single section to reduce heading overhead
- Merged Strategic Recommendations from a table into inline prose
- Collapsed "Prerequisites" → "Required Inputs" and trimmed verbose parentheticals
- Renamed "Guidelines" → "Checks" for scannability
- Reduced from ~112 lines to ~88 lines — roughly 20% smaller while preserving all domain content
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