docs+skills: add main UI/UX visual-truth PRD and skill links

.agents/skills/linus-beads-discipline/resources/BEADS_MEMORY.md

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+# Beads as Shared Memory
+
+**The shared brain for all Linus-agents.**
+
+## The Principle
+
+```
+All Linus-agents share the same beads.
+Your notes are read by other agents.
+Their notes inform your work.
+Coordinate through truth, not messages.
+```
+
+## Every Session
+
+### Start: READ
+```bash
+bd ready              # What's unblocked?
+bd show <id>          # What are the details?
+bd query "status=closed AND notes~=<topic>"  # What was learned before?
+```
+
+**NEVER start work without reading beads first.**
+
+### During: WRITE
+```bash
+bd update <id> --notes "Progress: ...
+Evidence: ...
+Blockers: ...
+Next: ..."
+```
+
+**Every meaningful progress = update.**
+
+### End: SYNC
+```bash
+bd sync    # Share with other agents
+```
+
+**NEVER end session without syncing.**
+
+## Handoff Protocol
+
+### When You're Done
+```bash
+bd update <id> --notes "Handoff:
+## Completed
+- X, Y done, evidence: [gates]
+
+## Incomplete
+- Z remaining
+
+## For Next Agent
+- Gotcha: <non-obvious thing>
+- Pattern: <what to follow>
+- Files: <what changed>"
+```
+
+### When Picking Up Another's Work
+```bash
+bd show <id>          # Read their notes
+bd query "id=<id>" --comments  # Read comments
+# Acknowledge their work in your first update
+bd update <id> --notes "Continuing from <agent>. Last state: ..."
+```
+
+## Memory That Survives Compaction
+
+When conversation is compacted, beads survives:
+
+```
+Previous session:
+- bd update bb-xyz --notes "Implemented X, need tests"
+
+After compaction:
+- bd show bb-xyz
+- Notes say: "Implemented X, need tests"
+- You know: Add tests
+- Zero context lost
+```
+
+**This is the point. Memory that survives session boundaries.**
+
+## Notes For Future Agents
+
+Your notes should answer:
+- **What did you learn?** (findings)
+- **What did you decide?** (decisions + rationale)
+- **What's incomplete?** (handoff)
+- **What blocked you?** (blockers)
+- **What would help next agent?** (hints)
+
+## Cross-Agent Visibility
+
+```bash
+# See who else is working
+bd query "status=in_progress"
+
+# See what was recently closed
+bd query "status=closed AND updated<1d"
+
+# See agent activity
+bd query "labels~=gt:agent"
+```
+
+## The Promise
+
+By using beads religiously:
+- **No lost context** - Compaction can't kill your work
+- **No truth drift** - State always matches reality
+- **No coordination overhead** - BD coordinates for you
+- **No "what was I doing?"** - Notes tell you
+- **No "who else is working?"** - Query tells you