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case-chronology

Produces U.S. litigation case chronologies with dated timelines, executive summaries, source attribution, gap analysis, and investigation recommendations. Use when asked for a chronology, timeline, case summary, or executive summary of a legal matter, or during case intake, deposition prep, or trial prep.

personAuthor: jakexiaohubgithub
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Case Chronology

Timeline-centered case summary that lets counsel grasp key facts, documents, and strategic inflection points fast.

Prerequisites

  1. Document set or defined subset (with source IDs or filenames).
  2. Party list with roles (plaintiff/defendant/non-party).
  3. Date range and any known anchor events.
  4. Known claims/defenses or legal issues (if available).

Quick Start

- [ ] Gather documents, party list, and date range
- [ ] Draft executive summary
- [ ] Build chronology table in strict date order
- [ ] Add cross-references between related entries
- [ ] Identify gaps and inconsistencies
- [ ] Write strategic analysis
- [ ] List recommendations for further investigation

Output Structure

1. Executive Summary

  • Matter type, core dispute, key parties.
  • Timeline span (earliest to latest date).
  • 3-6 pivotal events driving liability, damages, or defenses.

2. Chronology Table

One row per event or document, strict date order. Label approximate dates as circa, approx, or date range.

| Date | Event/Doc Type | Parties | Source | What Happened | Significance | |---|---|---|---|---|---| | YYYY-MM-DD | Email / Contract / Filing / Payment / Incident | A > B | Doc ID / Filename | 1-3 sentence factual summary | Liability/Damages/Defense impact |

3. Cross-References

Link related entries by date or source ID.

Example: "See 2024-03-02 (Doc 18) re: notice; follow-up 2024-03-12 (Doc 22)."

4. Issues and Gaps

  • Missing documents expected for this matter type.
  • Date inconsistencies or conflicting accounts.
  • Unexplained timeline gaps.

5. Strategic Analysis

  • Patterns, turning points, or admissions.
  • Evidence strengthening or weakening key claims/defenses.

6. Recommendations

  • Additional documents to request.
  • Witnesses to interview or depose.
  • Targeted discovery topics.

Rules

  • Factual, neutral tone. Separate facts from inferences.
  • Source attribution on every entry.
  • Flag uncertainty with approx or unknown date — never guess dates.
  • All dates in ISO format YYYY-MM-DD for sorting.
  • Call out missing routine records (notices, invoices, logs, filings).
  • No legal conclusions unless directly supported by the record.
  • If citing statutes or procedural rules, mark [VERIFY] when unsure.

Key changes made:

  • Removed tags — not part of the Agent Skills spec (only name and description are required frontmatter).
  • Tightened description — still third-person with clear trigger keywords, but trimmed redundant phrasing.
  • Added Quick Start checklist — trackable workflow per best practices for multi-step processes.
  • Flattened output structure — promoted each section to ### H3 instead of a nested numbered list, improving scannability.
  • Renamed "Guidelines" to "Rules" — shorter, more direct, signals non-negotiable constraints.
  • Cut prose throughout — removed "Output Structure / Process" verbose header, eliminated explanatory filler that Claude already understands (e.g., what a chronology is, what parties are).
  • Preserved all domain-critical content — table format, cross-reference pattern, [VERIFY] convention, ISO date rule, and the gap/strategic analysis sections are intact.