Document portable skill hardening

Author: tmusser

CHANGELOG.md

@@ -7,11 +7,17 @@
 - `LLM.md` as a compact agent-readable guide to the repo.
 - README front-door cleanup, including the routing table and compatibility/control matrix.
 - A clearer repo-specific `AGENTS.md`.
+- A portable output contract inside every installed skill.
+- Validation that rejects skill links escaping the installed skill folder.
 
 ### Changed
 
 - README sections were consolidated for faster scanning.
+- The quickstart now asks users to choose one install target instead of running both installers.
+- Downstream skills now accept fact ledgers or conversation-state records explicitly and preserve their source classifications.
+- Optional template references no longer use repository-relative paths that break after installation.
 
-### Notes
+### Fixed
 
-- This branch is documentation and productization only; skill behavior is unchanged.
+- Installed skills no longer depend on `../../references` or `../../templates` paths that are absent from the installed layout.
+- Assumptions, open questions, proposed actions, and stakeholder positions may not be promoted into facts, decisions, commitments, owners, or deadlines without new source support.