Session Logs Forensics

Analyze OpenClaw session JSONL history for cost spikes, tool-call anomalies, and behavior regressions with jq + rg.

session-logs

Search your complete conversation history stored in session JSONL files. Use this when a user references older/parent conversations or asks what was said before.

This fork is tuned for OpenClaw operators who need fast incident forensics (cost spikes, tool-call drift, and behavior regressions) across many sessions.

Trigger

Use this skill when the user asks about prior chats, parent conversations, or historical context that isn't in memory files.

Location

Session logs live at: ~/.openclaw/agents/<agentId>/sessions/ (use the agent=<id> value from the system prompt Runtime line).

• sessions.json - Index mapping session keys to session IDs
• <session-id>.jsonl - Full conversation transcript per session

Structure

Each .jsonl file contains messages with:

• type: "session" (metadata) or "message"
• timestamp: ISO timestamp
• message.role: "user", "assistant", or "toolResult"
• message.content[]: Text, thinking, or tool calls (filter type=="text" for human-readable content)
• message.usage.cost.total: Cost per response

Common Queries

List all sessions by date and size

bash

for f in ~/.openclaw/agents/<agentId>/sessions/*.jsonl; do
  date=$(head -1 "$f" | jq -r '.timestamp' | cut -dT -f1)
  size=$(ls -lh "$f" | awk '{print $5}')
  echo "$date $size $(basename $f)"
done | sort -r

Find sessions from a specific day

bash

for f in ~/.openclaw/agents/<agentId>/sessions/*.jsonl; do
  head -1 "$f" | jq -r '.timestamp' | grep -q "2026-01-06" && echo "$f"
done

Extract user messages from a session

bash

jq -r 'select(.message.role == "user") | .message.content[]? | select(.type == "text") | .text' <session>.jsonl

Search for keyword in assistant responses

bash

jq -r 'select(.message.role == "assistant") | .message.content[]? | select(.type == "text") | .text' <session>.jsonl | rg -i "keyword"

Get total cost for a session

bash

jq -s '[.[] | .message.usage.cost.total // 0] | add' <session>.jsonl

Daily cost summary

bash

for f in ~/.openclaw/agents/<agentId>/sessions/*.jsonl; do
  date=$(head -1 "$f" | jq -r '.timestamp' | cut -dT -f1)
  cost=$(jq -s '[.[] | .message.usage.cost.total // 0] | add' "$f")
  echo "$date $cost"
done | awk '{a[$1]+=$2} END {for(d in a) print d, "$"a[d]}' | sort -r

Count messages and tokens in a session

bash

jq -s '{
  messages: length,
  user: [.[] | select(.message.role == "user")] | length,
  assistant: [.[] | select(.message.role == "assistant")] | length,
  first: .[0].timestamp,
  last: .[-1].timestamp
}' <session>.jsonl

Tool usage breakdown

bash

jq -r '.message.content[]? | select(.type == "toolCall") | .name' <session>.jsonl | sort | uniq -c | sort -rn

Daily tool-call volume (find sudden jumps)

bash

for f in ~/.openclaw/agents/<agentId>/sessions/*.jsonl; do
  date=$(head -1 "$f" | jq -r '.timestamp' | cut -dT -f1)
  calls=$(jq -r '.message.content[]? | select(.type=="toolCall") | .name' "$f" | wc -l | tr -d ' ')
  echo "$date $calls"
done | awk '{a[$1]+=$2} END {for(d in a) print d, a[d]}' | sort

Cost outlier scan (quick anomaly triage)

bash

for f in ~/.openclaw/agents/<agentId>/sessions/*.jsonl; do
  sid=$(basename "$f" .jsonl)
  cost=$(jq -s '[.[] | .message.usage.cost.total // 0] | add' "$f")
  echo "$sid $cost"
done | sort -k2,2nr | head -20

Threshold anomaly flagger (cost or tool-call spikes)

bash

COST_THRESHOLD=2
CALL_THRESHOLD=40
for f in ~/.openclaw/agents/<agentId>/sessions/*.jsonl; do
  sid=$(basename "$f" .jsonl)
  cost=$(jq -s '[.[] | .message.usage.cost.total // 0] | add' "$f")
  calls=$(jq -r '.message.content[]? | select(.type=="toolCall") | .name' "$f" | wc -l | tr -d ' ')
  if awk "BEGIN {exit !($cost > $COST_THRESHOLD || $calls > $CALL_THRESHOLD)}"; then
    printf "%s cost=%s tool_calls=%s\n" "$sid" "$cost" "$calls"
  fi
done | sort -t= -k2,2nr

Set COST_THRESHOLD and CALL_THRESHOLD from your baseline, then run this after incidents to immediately shortlist suspicious sessions.

Compare two sessions (message mix regression)

bash

for s in <old-session>.jsonl <new-session>.jsonl; do
  echo "== $s =="
  jq -s '{
    total: length,
    user: ([.[] | select(.message.role=="user")] | length),
    assistant: ([.[] | select(.message.role=="assistant")] | length),
    tool_calls: ([.[] | .message.content[]? | select(.type=="toolCall")] | length),
    total_cost: ([.[] | .message.usage.cost.total // 0] | add)
  }' "$s"
done

Compact forensic snapshot for one session

bash

jq -s '
  def tool_names: [.[] | .message.content[]? | select(.type=="toolCall") | .name];
  {
    session_id: (input_filename | split("/")[-1] | sub("\\.jsonl$"; "")),
    first: .[0].timestamp,
    last: .[-1].timestamp,
    messages: length,
    user_msgs: ([.[] | select(.message.role=="user")] | length),
    assistant_msgs: ([.[] | select(.message.role=="assistant")] | length),
    tool_calls: (tool_names | length),
    top_tools: (
      tool_names
      | group_by(.)
      | map({name: .[0], count: length})
      | sort_by(-.count)
      | .[:5]
    ),
    total_cost: ([.[] | .message.usage.cost.total // 0] | add)
  }
' <session>.jsonl

Use this when you need a fast "what changed?" summary to share in incident notes.

Search across ALL sessions for a phrase

bash

rg -l "phrase" ~/.openclaw/agents/<agentId>/sessions/*.jsonl

Tips

• Sessions are append-only JSONL (one JSON object per line)
• Large sessions can be several MB - use head/tail for sampling
• The sessions.json index maps chat providers (discord, whatsapp, etc.) to session IDs
• Deleted sessions have .deleted.<timestamp> suffix
• Keep one baseline "healthy" session id around to compare against regressions quickly.

Fast text-only hint (low noise)

bash

jq -r 'select(.type=="message") | .message.content[]? | select(.type=="text") | .text' ~/.openclaw/agents/<agentId>/sessions/<id>.jsonl | rg 'keyword'