config(git,claude,ssh): templated gitconfig; claude settings/commands/hooks/skills; ssh config

gitconfig: name/email from chezmoi data, gh credential helper by PATH
lookup (portable to darwin). claude: no credentials, history, projects,
sessions, or plugin caches. ssh config as private_ (0600).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

dot_claude/skills/cloudflare/references/r2-sql/gotchas.md

@@ -0,0 +1,39 @@
+# R2 SQL Gotchas
+
+Operational pitfalls. For the authoritative list of supported features, unsupported features, and recommended workarounds, pull `https://developers.cloudflare.com/r2-sql/reference/limitations-best-practices/` and `https://developers.cloudflare.com/r2-sql/troubleshooting/`.
+
+## Access
+
+- **No Workers binding.** There is no `env.R2_SQL`. Query the REST endpoint via `fetch()` from a Worker ([patterns.md](patterns.md#dashboard-worker)), or use D1 / an external DB for OLTP.
+- Wrangler needs `WRANGLER_R2_SQL_AUTH_TOKEN` — it does **not** reuse the `wrangler login` OAuth session.
+- Open beta: R2 Storage **Admin Read & Write is required even for read-only** queries.
+
+## Type Safety
+
+```sql
+-- ❌ wrong                          -- ✅ right
+WHERE status = '200'                 WHERE status = 200
+WHERE ts > '2026-01-01'              WHERE ts > '2026-01-01T00:00:00Z'   -- need time + tz
+WHERE method = GET                   WHERE method = 'GET'
+```
+
+No implicit conversions. Timestamps must be RFC3339 with timezone; dates ISO 8601.
+
+## Performance
+
+- **File count dominates latency** — enable automatic compaction.
+- **Partition-filter + narrow time windows + always `LIMIT`.**
+- **Multi-way JOINs on large tables** can exceed resource limits — filter heavily, join through dimension tables.
+- Per-query `metrics` (`files_scanned`, `bytes_scanned`, `cache_hits`) are the primary observability signal; `bytes_scanned` ≈ billable data. For LIMIT bounds, pagination, and other guidance, see the limitations-best-practices doc.
+
+## Debug Checklist
+
+1. `wrangler r2 bucket catalog enable <bucket>` — catalog on?
+2. `echo $WRANGLER_R2_SQL_AUTH_TOKEN` — token set?
+3. `SHOW DATABASES` → `SHOW TABLES IN ns` → `DESCRIBE ns.table`
+4. `SELECT COUNT(*) FROM ns.table` — data present?
+5. Add filters incrementally; read `metrics` to tune.
+
+## See Also
+
+- [api.md](api.md) · [patterns.md](patterns.md) · [configuration.md](configuration.md)