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by cursorcursor/plugins9.1k stars
857

Use for 'why does X work this way', 'why we picked Y', design rationale, regressions, postmortems, or data-backed thresholds. Discovers available MCPs and queries each evidence category (source control, issue tracker, long-form docs, real-time chat, infrastructure observability, error tracking, product analytics warehouse) in parallel, then returns a cited read on decisions and tradeoffs. Use how for runtime behavior.

Use this Skill: https://skilld.dev/gh/cursor/plugins/why

This session only. Nothing lands on disk.

referencessource-playbook.md

≈341 tokens on demand. Your agent reads this file only when SKILL.md points to it.

Source playbooks

The why skill spawns one investigator per available evidence category, each reading a single source-specific playbook below. The playbooks are concrete examples for common MCPs. Adapt them for a different MCP in the same category.

Category Playbook Example MCP it documents
Source control history code-archaeology.md git, gh
Issue / ticket tracker linear.md Linear (adapt for Jira, GitHub Issues, Plane, Shortcut)
Long-form documents notion.md Notion (adapt for Confluence, Google Docs, Coda)
Real-time team chat slack.md Slack (adapt for Discord, Microsoft Teams, Mattermost)
Infrastructure observability datadog.md Datadog (adapt for New Relic, Honeycomb, Grafana, Splunk)
Error / exception tracking sentry.md Sentry (adapt for Rollbar, Bugsnag, Airbrake)
Product analytics warehouse databricks.md Databricks SQL (adapt for Snowflake, BigQuery, ClickHouse, dbt)

Cross-cutting:

  • incident-postmortem.md. Add this if the target code looks defensive (null checks, retry, timeout, rate limit, feature flag, egress guard, OOM handler).

Source: SKILL.md on GitHub

1 warning7d3 checks · Risk SAFE
  • Gen Agent Trust Hub7d

    The skill is a professional investigative tool designed to analyze the rationale behind code by aggregating data from various engineering tools. It is categorized as low risk due to the potential for indirect prompt injection from the diverse data sources it processes.

  • Socket7d

    No alerts

  • Snyk7d

    Risk: MEDIUM · 1 issue

Signed by skilld at 12d587d. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub yesterday.

Activeupdated last week
disable-model-invocation
true

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