docs: add GSD methodology mention with evaluation

- Added GSD to Tier 1: Strategic Orchestration (guide/methodologies.md:47-55)
- Meta-prompting 6-phase workflow with fresh 200k-token contexts per task
- Note: Core concepts overlap with existing patterns (Ralph Loop, Gas Town, BMAD)
- Resource evaluation saved in claudedocs/resource-evaluations/gsd-evaluation.md (score: 2/5 - marginal/redundant)
- Updated CHANGELOG.md and machine-readable/reference.yaml for LLM indexing
- Source: https://github.com/glittercowboy/get-shit-done (7.5k stars, created Dec 2025)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

guide/methodologies.md

@@ -44,6 +44,7 @@ Organized in a 6-tier pyramid from strategic orchestration down to optimization
 | Name | What | Best For | Claude Fit |
 |------|------|----------|------------|
 | **BMAD** | Multi-agent governance with constitution as guardrail | Enterprise 10+ teams, long-term projects | ⭐⭐ Niche but powerful |
+| **GSD** | Meta-prompting 6-phase workflow with fresh contexts per task | Solo devs, Claude Code CLI | ⭐⭐ Similar to patterns in guide |
 
 **BMAD (Breakthrough Method for Agile AI-Driven Development)** inverts the traditional paradigm: documentation becomes the source of truth, not code. Uses specialized agents (Analyst, PM, Architect, Developer, QA) orchestrated with strict governance.
 
@@ -51,6 +52,8 @@ Organized in a 6-tier pyramid from strategic orchestration down to optimization
 - **When to use**: Complex enterprise projects needing governance
 - **When to avoid**: Small teams, MVPs, rapid prototyping
 
+**GSD (Get Shit Done)** addresses context rot through systematic 6-phase workflow (Initialize → Discuss → Plan → Execute → Verify → Complete) with fresh 200k-token contexts per task. Core concepts (multi-agent orchestration, fresh context management) overlap significantly with existing patterns like Ralph Loop, Gas Town, and BMAD. See [resource evaluation](../claudedocs/resource-evaluations/gsd-evaluation.md) for detailed comparison.
+
 > **Emerging**: [Ralph Inferno](https://github.com/sandstream/ralph-inferno) implements autonomous multi-persona workflows (Analyst→PM→UX→Architect→Business) with VM-based execution and self-correcting E2E loops. Experimental but interesting for "vibe coding at scale".
 
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