docs: add Talk Preparation Pipeline workflow + skill templates

6-stage pipeline: raw material → conference talk → Kimi AI slides.

New files:
- guide/workflows/talk-pipeline.md — Full workflow guide (REX vs Concept
  modes, stage-by-stage breakdown, CHECKPOINT mechanics, Kimi handoff,
  real-world DevWithAI example, 5 design patterns documented)
- examples/skills/talk-pipeline/ — 7 SKILL.md files + orchestrator + 2
  templates (feedback-draft.md, kimi-prompt-template.md)

Updated:
- README.md — badges 164→172 templates, Feb 20 date, 13→14 skills
- guide/workflows/README.md — Talk Pipeline entry under Design & Content
- machine-readable/reference.yaml — 16 new entries for pipeline components
- CHANGELOG.md — [Unreleased] entry

Design patterns showcased: skill chaining + file-based state, tool
permission scoping (Bash only Stage 2), human-in-the-loop CHECKPOINT
(Stage 4), AI-to-AI handoff (Claude → Kimi), dual execution modes
(REX/Concept).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

guide/workflows/README.md

@@ -87,6 +87,12 @@ Generate professional PDFs using Quarto/Typst with Claude Code.
 
 **When to use**: Reports, documentation, whitepapers, technical documents
 
+### [Talk Preparation Pipeline](./talk-pipeline.md) ⭐ NEW
+
+6-stage skill pipeline: raw material → structured talk → AI-generated slides via Kimi.
+
+**When to use**: Conference talks, meetup presentations, internal tech talks — from article, transcript, or notes
+
 ### [TTS Setup](./tts-setup.md)
 
 Configure Text-to-Speech for Claude Code responses (Agent Vibes integration).
@@ -120,6 +126,7 @@ Systematically explore and understand unfamiliar codebases.
 | **New project from template** | [Skeleton Projects](./skeleton-projects.md) |
 | **Team AI instructions** | [Team AI Instructions](./team-ai-instructions.md) |
 | **Documentation** | [PDF Generation](./pdf-generation.md) |
+| **Conference talk from raw material** | [Talk Preparation Pipeline](./talk-pipeline.md) |
 | **Audio feedback** | [TTS Setup](./tts-setup.md) |
 
 ---