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-linter.md

@@ -0,0 +1,41 @@
+# skill: /linter
+
+**Location:** `custom-claude-skills/skills/linter/SKILL.md`
+
+## Purpose
+
+Audits and manages project formatters/linters. Three modes: scan (audit setup), run (format all files), cleanup (remove orphaned `.pre-lint` files).
+
+## Usage
+
+```
+/linter          # Scan mode (default) — audit setup
+/linter scan     # Same as above
+/linter run      # Format and lint all files
+/linter cleanup  # Remove orphaned .pre-lint files
+```
+
+## How it works
+
+### Scan mode
+1. Finds all file extensions in the project
+2. Checks `formatters/` directory for symlinks
+3. Verifies tool availability (ruff, shfmt, shellcheck, biome, sqlfluff, prettier)
+4. Checks for config files (pyproject.toml, .editorconfig, biome.json, .sqlfluff, .prettierrc)
+5. Checks pre-commit hook installation
+6. Presents results as a table with status per extension
+
+### Run mode
+1. Creates a git stash checkpoint
+2. Runs each formatter on all matching files
+3. Reports errors and `git diff --stat` summary
+
+### Cleanup mode
+1. Finds `*.pre-lint` files (orphaned checkpoint files from interrupted lint runs)
+2. Lists and removes them
+
+## Gotchas
+
+- Scan mode is non-destructive — safe to run anytime
+- Run mode creates a stash checkpoint for safety
+- `.pre-lint` files are git blob SHA references used by the PostToolUse hook for rollback