Add SessionStop hook and session-events.tsv duration tracking

- session-audit.json: add SessionStop entry pointing to new end-of-session scripts
- report-hook-event-end.sh/.ps1: log payload to hook-events.log and write TSV row to session-events.tsv
- report-hook-event.sh/.ps1: also write SessionStart TSV row to session-events.tsv so start/end pairs are queryable for duration

resources/hooks/session-audit.json

@@ -7,6 +7,14 @@
         "linux": "bash ~/.copilot-resources/resources/scripts/report-hook-event.sh",
         "windows": "powershell -NoProfile -File \"$HOME/.copilot-resources/resources/scripts/report-hook-event.ps1\""
       }
+    ],
+    "SessionStop": [
+      {
+        "type": "command",
+        "osx": "bash ~/.copilot-resources/resources/scripts/report-hook-event-end.sh",
+        "linux": "bash ~/.copilot-resources/resources/scripts/report-hook-event-end.sh",
+        "windows": "powershell -NoProfile -File \"$HOME/.copilot-resources/resources/scripts/report-hook-event-end.ps1\""
+      }
     ]
   }
 }

resources/scripts/report-hook-event-end.ps1

@@ -0,0 +1,12 @@
+$ErrorActionPreference = 'Stop'
+
+$StateDir = if ($env:COPILOT_RESOURCES_STATE_DIR) { $env:COPILOT_RESOURCES_STATE_DIR } else { Join-Path $HOME '.copilot-resources-state' }
+New-Item -ItemType Directory -Path $StateDir -Force | Out-Null
+
+$Payload = [Console]::In.ReadToEnd()
+$Payload | Add-Content -LiteralPath (Join-Path $StateDir 'hook-events.log')
+
+# Append a TSV row to session-events.tsv for duration tracking.
+"$(Get-Date -AsUTC -Format o)`tSessionEnd" | Add-Content -LiteralPath (Join-Path $StateDir 'session-events.tsv')
+
+'{"continue": true}'

resources/scripts/report-hook-event-end.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+state_dir="${COPILOT_RESOURCES_STATE_DIR:-$HOME/.copilot-resources-state}"
+mkdir -p -- "$state_dir"
+
+event_payload="$(cat)"
+printf '%s\n' "$event_payload" >> "$state_dir/hook-events.log"
+
+# Append a TSV row to session-events.tsv for duration tracking.
+printf '%s\tSessionEnd\n' "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" >> "$state_dir/session-events.tsv"
+
+printf '{"continue": true}\n'

resources/scripts/report-hook-event.ps1

@@ -6,6 +6,9 @@ New-Item -ItemType Directory -Path $StateDir -Force | Out-Null
 $Payload = [Console]::In.ReadToEnd()
 $Payload | Add-Content -LiteralPath (Join-Path $StateDir 'hook-events.log')
 
+# Append a TSV row to session-events.tsv for duration tracking.
+"$(Get-Date -AsUTC -Format o)`tSessionStart" | Add-Content -LiteralPath (Join-Path $StateDir 'session-events.tsv')
+
 $PortRegistryScript = Join-Path $PSScriptRoot 'update-port-registry.mjs'
 $NodeCommand = Get-Command node -ErrorAction SilentlyContinue
 if ($NodeCommand -and (Test-Path -LiteralPath $PortRegistryScript)) {

resources/scripts/report-hook-event.sh

@@ -10,6 +10,9 @@ mkdir -p -- "$state_dir"
 event_payload="$(cat)"
 printf '%s\n' "$event_payload" >> "$state_dir/hook-events.log"
 
+# Append a TSV row to session-events.tsv for duration tracking.
+printf '%s\tSessionStart\n' "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" >> "$state_dir/session-events.tsv"
+
 if command -v node >/dev/null 2>&1 && [[ -f "$port_registry_script" ]]; then
 	if ! printf '%s' "$event_payload" | node "$port_registry_script"; then
 		printf '%s update-port-registry failed\n' "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" >> "$state_dir/project-ports-errors.log"