Backfill memory files for all existing scripts and skills

Creates MEMORY.md index and 10 memory files documenting:
- Scripts: context-load, start-claude, install-hooks, setup-formatters, git-status-report
- Skills: /log, /reflect-logs, /reflect, /distill-best-practices, /linter

Each file covers purpose, usage, how it works, and gotchas.

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

memory/skill-distill-best-practices.md

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+# skill: /distill-best-practices
+
+**Location:** `custom-claude-skills/skills/distill-best-practices/SKILL.md`
+
+## Purpose
+
+Cross-project best practices distillation. Reads changed memory files from all tracked projects and proposes additions, updates, or removals to `claude-foundations/best-practices/`. Always targets claude-foundations as output regardless of which project it's run from.
+
+## Usage
+
+```
+/distill-best-practices
+```
+
+No arguments. Interactive — presents proposals for approval before applying.
+
+## How it works
+
+1. Reads `settings.yaml` for tracked projects and `best-practices/.distill-state.json` for last-processed SHAs
+2. For each project with changes since last SHA: finds changed `memory/*.md` files via `git diff`
+3. Maps memory files to best-practices topics (e.g., `gotchas-k8s.md` → `kubernetes.md`)
+4. Classifies each potential change as ADD, UPDATE, or REMOVE
+5. Presents numbered proposals — waits for user approval
+6. Applies approved changes, updates `BESTPRACTICES.md` index if new files created
+7. Updates `.distill-state.json` with current HEADs
+
+## Part of the knowledge pipeline
+
+`/log` → `/reflect-logs` → `/distill-best-practices`
+
+## Gotchas
+
+- Generalises project-specific details: strips IPs, namespace names, hostnames — keeps principles and reasoning
+- Only promotes lessons that would apply to at least one other project type
+- Never auto-applies — always interactive