Signals scout for ingestion warnings — events and person/group updates that were dropped, mangled, or partially rejected during ingestion. Watches the warnings stream for new warning types, bursts above a type's own baseline, and error-severity clusters with broad reach, and files each actionable root cause as a report with the affected events and the fix.

Signals scout over PostHog's own health checks. Reads the project's active health issues, bundles them by kind, weights by blast radius, and files the ones genuinely worth acting on as reports in the inbox.

Signals scout for PostHog feature flags. Watches the flag roster and the `$feature_flag_called` stream for evaluation cliffs, ghost flags, response-distribution shifts, and flag debt, and files each validated contradiction as a report in the inbox.

Signals scout for PostHog A/B experiments. Watches running experiments for validity threats (sample ratio mismatch, contamination, exposure stalls, mid-run flag mutations) and lifecycle drift (zombies, decided-but-running), and files each validated validity threat as a report in the inbox.

Focused Signals scout for PostHog projects importing external data into the warehouse. Watches the import side — external data sources, per-table sync schemas, webhook push channels, and materialized views — for the moments an import quietly stops keeping its promise: a source connection in Error, a schema Failed or stuck Running, silent staleness behind a green Completed status, a broken webhook push channel, a row-volume cliff, and failed materialized views. When armed imports are healthy, switches to the optimization lane: reads the per-team `query_log` table for recurring, multi-user query time and read-bytes concentrated on warehouse tables or repeated query shapes, filing materialization candidates and unused matviews as P3 suggestions. Files each validated import contradiction as an inbox report; otherwise writes durable memory and closes out empty.

Signals scout for PostHog data pipelines — CDP destinations and transformations, batch exports, and hog flows. Watches for delivery failures, degraded functions, and stalled exports against each pipeline's baseline, and files each validated delivery contradiction as a report in the inbox.

Signals scout for PostHog Customer analytics (Accounts). Watches per-account engagement for churn-risk shapes — engagement cliffs, dormancy, champion departure — and the expansion inverse, weighted by commercial ownership, and files each validated risk as a report in the inbox.

Signals scout for Content Security Policy violation reports. Watches `$csp_violation` events for blocked-URL clusters, per-directive bursts, post-deploy regressions, and suspicious third-party domains, and files each validated cluster as a report in the inbox.

Plan a huge chunk of work - more than one agent session can hold - as a shared map of investigation tickets on your issue tracker, and resolve them one at a time until the way to the destination is clear.

Create professional videos autonomously using claude-code-video-toolkit — AI voiceovers, image generation, music, talking heads, and Remotion rendering.

Review local character animation with schema checks, Playwright browser previews, frame sampling, and FFmpeg/ffprobe final output checks.

Adopt and maintain the apache-magpie framework in a project repo via the snapshot-based adoption mechanism. The only framework skill committed in an adopter's repo; every other skill is a symlink the adopt sub-action wires up. Sub-actions: `/magpie-setup` - first-time adoption (default; main-checkout only) `/magpie-setup upgrade` - refresh the gitignored snapshot per the committed lock (main-checkout only) `/magpie-setup worktree-init` - symlink a worktree's snapshot to the main's `/magpie-setup verify` - health check + drift detection `/magpie-setup skill-sources` - fetch/pin/symlink skills from trusted external sources listed in the adopter trust list (main-checkout only) `/magpie-setup override <skill>` - open or scaffold an agentic override in `.apache-magpie-overrides/` `/magpie-setup unadopt` - reverse the adoption (snapshot, locks, symlinks, hook, doc sections); preserves `.apache-magpie-overrides/` by default (main-checkout only)

Break requirements into epics and user stories. Use when the user says "create the epics and stories list"

Open a pull request for the current feature

Verify implementation matches change artifacts. Use when the user wants to validate that implementation is complete, correct, and coherent before archiving.

Use when reviewing rendered HTML, interactive components, or design-system patterns related to Support content reflow at 400% zoom. Check native semantics first, then inspect keyboard behavior, focus flow, accessible names, and screen-reader output where relevant.

Use when reviewing a codebase for internationalisation readiness, setting up an i18n library, or preparing strings for a new locale.

Use when reviewing card grid layouts with misaligned content areas, or any nested grid where child items need to align with sibling cards' corresponding sections without JavaScript intervention.

Use when applies to blog posts, news articles, tutorials, and other long-form content. Less relevant for product pages, service pages, or home pages. Use when optimizing content distribution.

Use when reviewing article images, cards, galleries, or any component rendered at multiple sizes across breakpoints. Check both the markup and the CSS layout because an incorrect `sizes` attribute can negate a perfectly good `srcset`.