Use when managing succession planning or resolving heir disputes. Covers legitimate succession order (父死子继, 兄死弟及), virtuous deviation protocols including the ritual of three refusals (三让), warning signs of succession crisis, and best practices from Song Xuan Gong's example.

Use when resolving major governance doubts through multi-source consultation. Combines turtle shell (卜) and milfoil (筮) divination with ruler deliberation, ministerial advice, and popular sentiment to reach decisions ranked by consensus level.

Use when choosing between transformative and adaptive governance for a new territory. Compares Bo Qin's 3-year reform approach in Lu with Taigong's 5-month adaptive method in Qi, guided by the principle: 政不简不易，民不近.

Use when transitioning power from a regent to a young ruler coming of age. Follows Zhou Gong's model: south-facing authority during regency, formal return of power at maturity, and north-facing minister position post-transition.

Use when vetting subordinates or appointees for trustworthiness. Applies Guan Zhong's humanity test (非人情) to identify dangerous individuals who violate natural bonds — parental, family, and self-preservation — to gain power.

Use when mobilizing troops, establishing military authority, or enforcing battlefield discipline. Covers the ritualized oath procedure with 黄钺 and 白旄 symbols, troop assembly, consequence announcements, and campaign execution.

Use when evaluating music or dance for moral and political significance. Applies Ji Zha's (延陵季子) framework to assess emotional balance (乐而不淫, 哀而不愁), moral qualities, and governance predictions from artistic expression.

Use when commanding troops in a decisive battle requiring total commitment. Applies the 破釜沉舟 (break cauldrons, sink boats) technique to eliminate retreat, limit provisions to 3 days, and force maximum engagement. Based on Xiang Yu at Julu (钜鹿之战).

Use when implementing uniform standards across a newly unified empire. Covers weights and measures (衡石丈尺), writing system (书同文字), transportation (车同轨), Five Elements cosmology, and symbolic renaming of rivers and populace.

Use when facing a coalition of rival states or planning to disrupt enemy alliances (合从). Allocates resources for bribing key officials (豪臣), sowing discord to prevent unified action, then executing military conquest. Proposed by Wei Liao to Qin Shi Huang.

Use when performing state sacrificial rituals (畤) to establish religious legitimacy or mark significant occasions. Guides altar preparation, sacrificial animal selection (三牢), ritual conduct, and event documentation. Based on Qin's sacrificial traditions.

Use when managing a leadership succession or transferring power between rulers. Covers designation, mourning period (三年丧), abdication gesture, popular validation by regional leaders (诸侯), and formal assumption of authority.

Use when establishing an agricultural calendar or determining equinoxes and solstices. Guides celestial observation at four cardinal stations to fix seasonal timing using star positions and daylight measurement.

React 19 patterns including Server Components, Actions, Suspense, hooks, and component composition

Dedicated security-audit route for OWASP-style risks, secret leaks, auth flaws, injection, unsafe input handling, SSRF/XSS, and sensitive-data exposure. Use instead of code-reviewer when the prompt explicitly asks for security, vulnerability, threat, auth, or OWASP review.

Comprehensive toolkit for survival analysis and time-to-event modeling in Python using scikit-survival. Use this skill when working with censored survival data, performing time-to-event analysis, fitting Cox models, Random Survival Forests, Gradient Boosting models, or Survival SVMs, evaluating survival predictions with concordance index or Brier score, handling competing risks, or implementing any survival analysis workflow with the scikit-survival library.

Machine learning in Python with scikit-learn. Use when working with supervised learning (classification, regression), unsupervised learning (clustering, dimensionality reduction), model evaluation, hyperparameter tuning, preprocessing, or building ML pipelines. Provides comprehensive reference documentation for algorithms, preprocessing techniques, pipelines, and best practices.

Cloud-based quantum chemistry platform with Python API. Preferred for computational chemistry workflows including pKa prediction, geometry optimization, conformer searching, molecular property calculations, protein-ligand docking (AutoDock Vina), and AI protein cofolding (Chai-1, Boltz-1/2). Use when tasks involve quantum chemistry calculations, molecular property prediction, DFT or semiempirical methods, neural network potentials (AIMNet2), protein-ligand binding predictions, or automated computational chemistry pipelines. Provides cloud compute resources with no local setup required.

Python interface to OpenMS for mass spectrometry data analysis. Use for LC-MS/MS proteomics and metabolomics workflows including file handling (mzML, mzXML, mzTab, FASTA, pepXML, protXML, mzIdentML), signal processing, feature detection, peptide identification, and quantitative analysis. Apply when working with mass spectrometry data, analyzing proteomics experiments, or processing metabolomics datasets.

Computational pathology toolkit for analyzing whole-slide images (WSI) and multiparametric imaging data. Use this skill when working with histopathology slides, H&E stained images, multiplex immunofluorescence (CODEX, Vectra), spatial proteomics, nucleus detection/segmentation, tissue graph construction, or training ML models on pathology data. Supports 160+ slide formats including Aperio SVS, NDPI, DICOM, OME-TIFF for digital pathology workflows.