chore: initial commit — portable agent memory & skill scaffold

Extracted and cleaned up from a prior WSL/Windows agent-memory setup.
Contains only project-agnostic content:

- Claude_Memory/: feedback rules, user profile, reusable reference docs,
  session scratch space (claude_info/, claude_log/), mirrored skill defs
- caveman/: ultra-compressed communication mode skill + subcommands
- html-slide-deck/: self-contained HTML slide deck builder skill

Project-specific knowledge (previously mixed in) was moved out to each
project's own repository as part of this cleanup.

caveman/caveman-help/README.md

@@ -0,0 +1,38 @@
+# caveman-help
+
+Quick-reference card. One shot, no mode change.
+
+## What it does
+
+Prints a cheat sheet of all caveman modes, sibling skills, deactivation triggers, and how to set the default mode via env var or config file. One-shot display — does not flip the active mode, write flag files, or persist anything. Use when you forget the slash commands.
+
+## How to invoke
+
+```
+/caveman-help
+```
+
+Also triggers on "caveman help", "what caveman commands", "how do I use caveman".
+
+## Example output
+
+```
+Modes:
+  /caveman              full (default)
+  /caveman lite         lighter
+  /caveman ultra        extreme
+  /caveman wenyan       classical Chinese
+
+Skills:
+  /caveman-commit       terse Conventional Commits
+  /caveman-review       one-line PR comments
+  /caveman-stats        session token savings
+
+Deactivate:
+  "stop caveman" or "normal mode"
+```
+
+## See also
+
+- [`SKILL.md`](./SKILL.md) — full reference card
+- [Caveman README](../../README.md) — repo overview