Add .tasks/ folder for subagent task management with Round 26 backlog

Author: subtleGradient

.tasks/README.md

@@ -0,0 +1,75 @@
+# Subagent Task Cards
+
+This folder contains task assignments for AI subagents. Each task is a markdown file that the assigned subagent updates as work progresses.
+
+## Folder Structure
+
+```
+.tasks/
+├── README.md                    # This file
+├── active/                      # Currently assigned tasks
+│   └── TASK-001-description.md  # Task being worked on
+├── done/                        # Completed tasks
+│   └── TASK-001-description.md  # Completed with notes
+└── backlog/                     # Planned but not yet assigned
+    └── TASK-002-description.md  # Ready for next round
+```
+
+## Task File Format
+
+```markdown
+# TASK-XXX: [Short Description]
+
+## Status
+- [ ] Assigned
+- [ ] In Progress
+- [ ] Blocked (reason: ...)
+- [ ] Complete
+
+## Priority
+high | medium | low
+
+## Assigned To
+[subagent type: general | explore | ...]
+
+## Description
+What needs to be done.
+
+## Files to Modify
+- `path/to/file1.zig`
+- `path/to/file2.ts`
+
+## Acceptance Criteria
+- [ ] Criterion 1
+- [ ] Criterion 2
+
+## Progress Log
+### YYYY-MM-DD HH:MM
+- [What was done]
+- [What's next]
+
+## Completion Notes
+[Filled in when done: what was accomplished, commit hash, any follow-up needed]
+```
+
+## Workflow
+
+### Orchestrator (Main Agent)
+1. Creates task cards in `.tasks/backlog/`
+2. Moves to `.tasks/active/` when assigning to subagent
+3. Reviews completed tasks
+4. Moves to `.tasks/done/` and updates gap-backlog
+
+### Subagent
+1. Reads assigned task from `.tasks/active/`
+2. Updates status to "In Progress"
+3. Adds progress log entries as work proceeds
+4. Updates status to "Complete" with completion notes
+5. Does NOT move the file (orchestrator does that)
+
+## Rules
+1. **One task per file** - keeps diffs clean
+2. **Update frequently** - progress log should reflect current state
+3. **Be specific** - acceptance criteria must be testable
+4. **No stale tasks** - if blocked >1 round, document why
+5. **Commit task updates** - task card changes are part of the commit

.tasks/backlog/TASK-026-A-macos-universal-binary.md

@@ -0,0 +1,44 @@
+# TASK-026-A: Build macOS Universal Binary
+
+## Status
+- [x] Planned
+- [ ] Assigned
+- [ ] In Progress
+- [ ] Complete
+
+## Priority
+medium
+
+## Assigned To
+general
+
+## Description
+Create a macOS universal binary (aarch64 + x86_64) for the Zig CR-SQLite extension using the lipo-based approach documented in Round 23 research.
+
+## Files to Modify
+- `zig/Makefile` - Add universal binary target
+
+## Acceptance Criteria
+- [ ] `make universal` target exists in `zig/Makefile`
+- [ ] Builds both aarch64-macos and x86_64-macos
+- [ ] Uses `lipo -create` to combine into single binary
+- [ ] Output at `zig-out-universal/lib/libcrsqlite.dylib`
+- [ ] `lipo -info` shows both architectures
+- [ ] All tests pass with universal binary
+
+## Implementation Notes
+From Round 23 research:
+```makefile
+build-macos-universal: build-macos-arm64 build-macos-x64
+	lipo -create \
+		zig-out-arm64/lib/libcrsqlite.dylib \
+		zig-out-x64/lib/libcrsqlite.dylib \
+		-output zig-out-universal/lib/libcrsqlite.dylib
+```
+
+## Progress Log
+### 2025-12-14
+- Task created from Round 23 research findings
+
+## Completion Notes
+[To be filled when complete]

AGENTS.md

@@ -70,6 +70,33 @@ This project is undergoing a major rewrite from C/Rust to Zig. The following wor
 10. While not yet done, goto step 1
 ```
 
+### Subagent Task Management
+
+Task cards live in `.tasks/` folder:
+
+```
+.tasks/
+├── README.md           # Instructions for task management
+├── backlog/            # Planned tasks ready for next round
+│   └── TASK-XXX-*.md   # Task cards waiting to be assigned
+├── active/             # Currently assigned tasks (move here when assigning)
+│   └── TASK-XXX-*.md   # Tasks being worked on
+└── done/               # Completed tasks archive
+    └── TASK-XXX-*.md   # With completion notes
+```
+
+**Orchestrator workflow**:
+1. Create task cards in `.tasks/backlog/`
+2. Move to `.tasks/active/` when assigning to subagent
+3. Subagent updates progress in the task card
+4. Move to `.tasks/done/` when complete
+
+**Subagent workflow**:
+1. Read assigned task from `.tasks/active/`
+2. Update status checkboxes and progress log
+3. Commit task card updates with code changes
+4. Mark complete when done (orchestrator moves file)
+
 ### Document Organization
 
 ```