1  # Session Metrics — Bob
 2  
 3  ## Session 3: Voice Assistant UI/UX Research (2026-03-30)
 4  
 5  ### Turn Log
 6  
 7  | Turn | Start (UTC) | End (UTC) | Duration | Description |
 8  |------|-------------|-----------|----------|-------------|
 9  | 1 | 13:57:58 | 14:09:06 | ~11m | Deep research: 25+ web searches, 10+ page fetches on voice assistant UI/UX best practices |
10  
11  ## Session 2: NixOS Flake & Install (2026-03-24)
12  
13  ### Turn Log
14  
15  | Turn | Start (UTC) | End (UTC) | Duration | Description |
16  |------|-------------|-----------|----------|-------------|
17  | 1 | 19:54:12 | 19:58:24 | ~4m | Flake creation: 10 nix files, research agent, flake check fix |
18  | 2 | 20:14:33 | 20:19:46 | ~5m | Nix install on WSL, SSH key added, pre-flight check |
19  | 3 | 20:19:46 | 20:49:24 | ~30m | nixos-anywhere attempts (3x), manual partitioning, manual bootloader, reboot |
20  | 4 | 01:19:31 | 01:25:00 | ~6m | Documentation & metrics update |
21  
22  ### Token Summary (from session JSONL, extracted via `scripts/session-metrics.py`)
23  
24  | Metric | Value |
25  |--------|-------|
26  | Input tokens | 256 |
27  | Output tokens | 45,132 |
28  | Cache read | 15,827,840 |
29  | Cache write | 472,099 |
30  | Assistant messages | 198 |
31  | Tool uses | 117 |
32  | Estimated cost | $28.90 |
33  
34  ### Session Summary
35  
36  - **Total wall time**: ~55 min (turn 1 start to turn 3 end) + ~6 min docs
37  - **Subagent usage**: 1 Explore agent (research, ~93s, ~50k tokens)
38  - **Key artifacts**: 10 nix config files, ops docs updated, known-issues documented, session-metrics.py created
39  - **Outcome**: NixOS installed but boot blocked on partition label mismatch (needs console fix)
40  
41  ## Session 1: Research & Planning (2026-03-23)
42  
43  > Metrics not tracked (pre-metrics setup). Estimated ~2-3 hours based on work volume.