docs(memory): update skills for opencode-memory plugin, deprecate mem0

.sisyphus/notepads/memory-system/decisions.md

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+
+## Task 5: Update Mem0 Memory Skill (2026-02-12)
+
+### Decisions Made
+
+1. **Section Placement**: Added new sections without disrupting existing content structure
+   - "Memory Categories" after "Identity Scopes" (line ~109)
+   - "Dual-Layer Sync" after "Workflow Patterns" (line ~138)
+   - Extended "Health Check" section with Pre-Operation Check
+   - "Error Handling" at end, before API Reference
+
+2. **Content Structure**: 
+   - Memory Categories: 5-category classification with table format
+   - Dual-Layer Sync: Complete sync pattern with bash example
+   - Health Check: Added pre-operation verification
+   - Error Handling: Comprehensive graceful degradation patterns
+
+3. **Validation Approach**: 
+   - Used `./scripts/test-skill.sh --validate` for skill structure validation
+   - All sections verified with grep commands
+   - Commit and push completed successfully
+
+### Success Patterns
+
+- Edit tool works well for adding sections to existing markdown files
+- Preserving existing content while adding new sections
+- Using grep for verification of section additions
+- `./scripts/test-skill.sh --validate` validates YAML frontmatter automatically

.sisyphus/notepads/memory-system/learnings.md

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+
+## Core Memory Skill Creation (2026-02-12)
+
+**Task**: Create `skills/memory/SKILL.md` - dual-layer memory orchestration skill
+
+**Pattern Identified**:
+- Skill structure follows YAML frontmatter with required fields:
+  - `name`: skill identifier
+  - `description`: Use when (X), triggers (Y) pattern
+  - `compatibility`: "opencode"
+- Markdown structure: Overview, Prerequisites, Workflows, Error Handling, Integration, Quick Reference, See Also
+
+**Verification Pattern**:
+```bash
+test -f <path> && echo "File exists"
+grep "name: <skill>" <path>
+grep "key-term" <path>
+```
+
+**Key Design Decision**: 
+- Central orchestration skill that references underlying implementation skills (mem0-memory, obsidian)
+- 4 core workflows: Store, Recall, Auto-Capture, Auto-Recall
+- Error handling with graceful degradation
+
+## Apollo Agent Prompt Update (2026-02-12)
+
+**Task**: Add memory management responsibilities to Apollo agent system prompt
+
+**Edit Pattern**: Multiple targeted edits to single file preserving existing content
+- Line number-based edits require precise matching of surrounding context
+- Edit order: Core Responsibilities → Quality Standards → Tool Usage → Edge Cases
+- Each edit inserts new bullet items without removing existing content
+
+**Key Additions**:
+1. Core Responsibilities: "Manage dual-layer memory system (Mem0 + Obsidian CODEX)"
+2. Quality Standards: Memory storage, auto-capture, retrieval, categories
+3. Tool Usage: Mem0 REST API (localhost:8000), Obsidian MCP integration
+4. Edge Cases: Mem0 unavailable, Obsidian unavailable handling
+
+**Verification Pattern**:
+```bash
+grep -c "memory" ~/p/AI/AGENTS/prompts/apollo.txt  # Count occurrences
+grep "Mem0" ~/p/AI/AGENTS/prompts/apollo.txt         # Check specific term
+grep -i "auto-capture" ~/p/AI/AGENTS/prompts/apollo.txt  # Case-insensitive
+```
+
+**Observation**: grep is case-sensitive by default - use -i for case-insensitive searches