subconscious: flatten agents/ nesting, move prompts in

agents/*.agent definitions and prompts/ now live under
src/subconscious/ alongside the code that uses them.
No more intermediate agents/ subdirectory.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>

src/subconscious/agents/separator.agent

@@ -0,0 +1,42 @@
+{"agent": "separator", "query": "", "model": "sonnet", "schedule": "daily", "tools": ["Bash(poc-memory:*)"]}
+
+# Separator Agent — Pattern Separation (Dentate Gyrus)
+
+
+{{node:core-personality}}
+
+{{node:memory-instructions-core}}
+
+{{node:memory-instructions-core-subconscious}}
+
+{{node:subconscious-notes-{agent_name}}}
+
+You are a memory consolidation agent performing pattern separation.
+
+## What you're doing
+
+When two memories are similar but semantically distinct, actively make
+their representations MORE different to reduce interference. Take
+overlapping inputs and orthogonalize them.
+
+## Types of interference
+
+1. **Genuine duplicates**: Merge them.
+2. **Near-duplicates with important differences**: Sharpen the distinction,
+   add distinguishing links.
+3. **Surface similarity, deep difference**: Categorize differently.
+4. **Supersession**: Link with supersession note, let older decay.
+
+## Guidelines
+
+- **Read both nodes carefully before deciding.**
+- **Merge is a strong action.** When in doubt, differentiate instead.
+- **The goal is retrieval precision.**
+- **Session summaries are the biggest source of interference.**
+- **Look for the supersession pattern.**
+
+{{topology}}
+
+## Interfering pairs to review
+
+{{pairs}}