feat: consolidate all Anthropic plugins into ECC v2.0.0

Ports functionality from 10+ separate plugins into ECC so users only
need one plugin installed. Consolidates: pr-review-toolkit, feature-dev,
commit-commands, hookify, code-simplifier, security-guidance,
frontend-design, explanatory-output-style, and personal skills.

New agents (8): code-architect, code-explorer, code-simplifier,
comment-analyzer, conversation-analyzer, pr-test-analyzer,
silent-failure-hunter, type-design-analyzer

New commands (9): commit, commit-push-pr, clean-gone, review-pr,
feature-dev, hookify, hookify-list, hookify-configure, hookify-help

New skills (8): frontend-design, hookify-rules, github-ops,
knowledge-ops, lead-intelligence, oura-health, pmx-guidelines, remotion

Enhanced skills (8): article-writing, content-engine, market-research,
investor-materials, investor-outreach, x-api, security-scan,
autonomous-loops — merged with personal skill content

New hook: security-reminder.py (pattern-based OWASP vulnerability
warnings on file edits)

Totals: 36 agents, 69 commands, 128 skills, 29 hook scripts

skills/remotion/rules/transitions.md

@@ -0,0 +1,122 @@
+---
+name: transitions
+description: Fullscreen scene transitions for Remotion.
+metadata:
+  tags: transitions, fade, slide, wipe, scenes
+---
+
+## Fullscreen transitions
+
+Using `<TransitionSeries>` to animate between multiple scenes or clips.  
+This will absolutely position the children.
+
+## Prerequisites
+
+First, the @remotion/transitions package needs to be installed.  
+If it is not, use the following command:
+
+```bash
+npx remotion add @remotion/transitions # If project uses npm
+bunx remotion add @remotion/transitions # If project uses bun
+yarn remotion add @remotion/transitions # If project uses yarn
+pnpm exec remotion add @remotion/transitions # If project uses pnpm
+```
+
+## Example usage
+
+```tsx
+import {TransitionSeries, linearTiming} from '@remotion/transitions';
+import {fade} from '@remotion/transitions/fade';
+
+<TransitionSeries>
+  <TransitionSeries.Sequence durationInFrames={60}>
+    <SceneA />
+  </TransitionSeries.Sequence>
+  <TransitionSeries.Transition presentation={fade()} timing={linearTiming({durationInFrames: 15})} />
+  <TransitionSeries.Sequence durationInFrames={60}>
+    <SceneB />
+  </TransitionSeries.Sequence>
+</TransitionSeries>;
+```
+
+## Available Transition Types
+
+Import transitions from their respective modules:
+
+```tsx
+import {fade} from '@remotion/transitions/fade';
+import {slide} from '@remotion/transitions/slide';
+import {wipe} from '@remotion/transitions/wipe';
+import {flip} from '@remotion/transitions/flip';
+import {clockWipe} from '@remotion/transitions/clock-wipe';
+```
+
+## Slide Transition with Direction
+
+Specify slide direction for enter/exit animations.
+
+```tsx
+import {slide} from '@remotion/transitions/slide';
+
+<TransitionSeries.Transition presentation={slide({direction: 'from-left'})} timing={linearTiming({durationInFrames: 20})} />;
+```
+
+Directions: `"from-left"`, `"from-right"`, `"from-top"`, `"from-bottom"`
+
+## Timing Options
+
+```tsx
+import {linearTiming, springTiming} from '@remotion/transitions';
+
+// Linear timing - constant speed
+linearTiming({durationInFrames: 20});
+
+// Spring timing - organic motion
+springTiming({config: {damping: 200}, durationInFrames: 25});
+```
+
+## Duration calculation
+
+Transitions overlap adjacent scenes, so the total composition length is **shorter** than the sum of all sequence durations.
+
+For example, with two 60-frame sequences and a 15-frame transition:
+
+- Without transitions: `60 + 60 = 120` frames
+- With transition: `60 + 60 - 15 = 105` frames
+
+The transition duration is subtracted because both scenes play simultaneously during the transition.
+
+### Getting the duration of a transition
+
+Use the `getDurationInFrames()` method on the timing object:
+
+```tsx
+import {linearTiming, springTiming} from '@remotion/transitions';
+
+const linearDuration = linearTiming({durationInFrames: 20}).getDurationInFrames({fps: 30});
+// Returns 20
+
+const springDuration = springTiming({config: {damping: 200}}).getDurationInFrames({fps: 30});
+// Returns calculated duration based on spring physics
+```
+
+For `springTiming` without an explicit `durationInFrames`, the duration depends on `fps` because it calculates when the spring animation settles.
+
+### Calculating total composition duration
+
+```tsx
+import {linearTiming} from '@remotion/transitions';
+
+const scene1Duration = 60;
+const scene2Duration = 60;
+const scene3Duration = 60;
+
+const timing1 = linearTiming({durationInFrames: 15});
+const timing2 = linearTiming({durationInFrames: 20});
+
+const transition1Duration = timing1.getDurationInFrames({fps: 30});
+const transition2Duration = timing2.getDurationInFrames({fps: 30});
+
+const totalDuration = scene1Duration + scene2Duration + scene3Duration - transition1Duration - transition2Duration;
+// 60 + 60 + 60 - 15 - 20 = 145 frames
+```