docs(skills): salvage dropped trigger content into skill bodies

For 14 of 74 compressed skills, the original description contained
trigger keywords, technique counts, attribution, or use-case phrases
not covered by the existing body content. Prepends a 'When to use' /
'What's inside' block near the top so the agent still has the full
context when the skill is loaded.

Skills salvaged:
- codex, ascii-video, creative-ideation, excalidraw, manim-video, p5js
- gif-search, heartmula, youtube-content
- lm-evaluation-harness, obliteratus, vllm, axolotl
- powerpoint

Remaining 60 skills were verified to already cover the dropped content
in their existing body sections (When to Use, overview, intro prose)
or had short descriptions fully captured by the new compressed form.

skills/creative/ascii-video/SKILL.md

@@ -5,6 +5,14 @@ description: "ASCII video: convert video/audio to colored ASCII MP4/GIF."
 
 # ASCII Video Production Pipeline
 
+## When to use
+
+Use when users request: ASCII video, text art video, terminal-style video, character art animation, retro text visualization, audio visualizer in ASCII, converting video to ASCII art, matrix-style effects, or any animated ASCII output.
+
+## What's inside
+
+Production pipeline for ASCII art video — any format. Converts video/audio/images/generative input into colored ASCII character video output (MP4, GIF, image sequence). Covers: video-to-ASCII conversion, audio-reactive music visualizers, generative ASCII art animations, hybrid video+audio reactive, text/lyrics overlays, real-time terminal rendering.
+
 ## Creative Standard
 
 This is visual art. ASCII characters are the medium; cinema is the standard.

skills/creative/creative-ideation/SKILL.md

@@ -14,6 +14,10 @@ metadata:
 
 # Creative Ideation
 
+## When to use
+
+Use when the user says 'I want to build something', 'give me a project idea', 'I'm bored', 'what should I make', 'inspire me', or any variant of 'I have tools but no direction'. Works for code, art, hardware, writing, tools, and anything that can be made.
+
 Generate project ideas through creative constraints. Constraint + direction = creativity.
 
 ## How It Works

skills/creative/excalidraw/SKILL.md

@@ -16,6 +16,10 @@ metadata:
 
 Create diagrams by writing standard Excalidraw element JSON and saving as `.excalidraw` files. These files can be drag-and-dropped onto [excalidraw.com](https://excalidraw.com) for viewing and editing. No accounts, no API keys, no rendering libraries -- just JSON.
 
+## When to use
+
+Generate `.excalidraw` files for architecture diagrams, flowcharts, sequence diagrams, concept maps, and more. Files can be opened at excalidraw.com or uploaded for shareable links.
+
 ## Workflow
 
 1. **Load this skill** (you already did)

skills/creative/manim-video/SKILL.md

@@ -6,6 +6,10 @@ version: 1.0.0
 
 # Manim Video Production Pipeline
 
+## When to use
+
+Use when users request: animated explanations, math animations, concept visualizations, algorithm walkthroughs, technical explainers, 3Blue1Brown style videos, or any programmatic animation with geometric/mathematical content. Creates 3Blue1Brown-style explainer videos, algorithm visualizations, equation derivations, architecture diagrams, and data stories using Manim Community Edition.
+
 ## Creative Standard
 
 This is educational cinema. Every frame teaches. Every animation reveals structure.

skills/creative/p5js/SKILL.md

@@ -10,6 +10,14 @@ metadata:
 
 # p5.js Production Pipeline
 
+## When to use
+
+Use when users request: p5.js sketches, creative coding, generative art, interactive visualizations, canvas animations, browser-based visual art, data viz, shader effects, or any p5.js project.
+
+## What's inside
+
+Production pipeline for interactive and generative visual art using p5.js. Creates browser-based sketches, generative art, data visualizations, interactive experiences, 3D scenes, audio-reactive visuals, and motion graphics — exported as HTML, PNG, GIF, MP4, or SVG. Covers: 2D/3D rendering, noise and particle systems, flow fields, shaders (GLSL), pixel manipulation, kinetic typography, WebGL scenes, audio analysis, mouse/keyboard interaction, and headless high-res export.
+
 ## Creative Standard
 
 This is visual art rendered in the browser. The canvas is the medium; the algorithm is the brush.