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Claude-Code-Monitor/plugins/ccam-devtools/skills/event-trace/SKILL.md
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nntrivi2001 57dc91585d feat: Claude Code Monitor — lanes, pipelines and a merged workspace
Internal SmartGift build of a Claude Code monitoring dashboard.

Lanes: a durable unit of parallel agent work, one per working directory,
tracked across session restarts. Managed lanes are git worktrees the
dashboard provisions and can reset or remove behind a three-check destroy
guard and a counted preflight; adopted lanes are directories you already
own and are never destroyable.

Pipelines: a lane moves through pipeline stages. A stage the agent declares
with evidence renders green; a stage inferred from the tool-event stream
renders dashed amber and never counts as done. Detection is forward-only
within a 30-minute window, and never writes the declared stage.

Workspace: one page at /run with a lane grid, the selected lane's pipeline,
and a full Claude console behind a disclosure.
2026-07-30 14:39:03 +07:00

3.0 KiB

description
description
Trace the full event chain for one Claude Code session into an ordered timeline of every event type with tool_name and summary, highlighting gaps, out-of-order events, and failures. Reads /api/events?session_id= and /api/sessions/:id from the Agent Monitor dashboard. Use when debugging what a session actually did, step by step.

Event Trace

Build a chronological, annotated event timeline for a single session.

Input

The user provides: $ARGUMENTS

This is a session ID. It may also be:

  • latest / last — trace the most recently updated session
  • errors — trace the most recent session whose status is error

Data Sources

Endpoint Returns
GET /api/sessions?limit=N session list (used to resolve latest/errors and the target id)
GET /api/sessions/:id full session detail (status, model, cwd, started_at, ended_at, cost, nested agents + events)
GET /api/events?session_id=X the ordered event stream: event_type, tool_name, summary, data, timestamp

Report Sections

1. Resolve the session

If $ARGUMENTS is a raw id, use it. If latest/last, call GET /api/sessions?limit=1. If errors, call GET /api/sessions?limit=10&status=error and pick the newest. Confirm the id resolves via GET /api/sessions/:id; if not, report it as missing and stop.

2. Session header

From GET /api/sessions/:id: id, status, model, cwd, started_at → ended_at, total duration, cost (USD to 4 decimals), and counts (events, agents).

3. Ordered timeline

From GET /api/events?session_id=X, list every event in timestamp order. One row per event:

| # | time | Δ since prev | event_type | tool_name | summary |

Cover all event types present: SessionStart, PreToolUse, PostToolUse, Stop, SubagentStop, Compaction, APIError, TurnDuration, Notification, SessionEnd.

4. Gap & failure highlights

Annotate the timeline:

  • Gaps: any Δ > 30s between consecutive events — mark and note the wait.
  • Unpaired tool calls: a PreToolUse with no matching PostToolUse (same tool_name, next in stream) — mark ⚠️ "no completion recorded".
  • Failures: APIError events and PostToolUse whose summary/data indicates an error — mark with the error text.
  • Compaction: mark ♻️ and note it resets the visible token baseline.
  • Missing bookends: no SessionStart at the head or no Stop/SessionEnd at the tail of an ended session — mark 🚩.

5. Verdict

One line: CLEAN, GAPS DETECTED, or FAILURES PRESENT — with the count of each flag type and the single most likely thing to investigate next.

Output

  • Markdown timeline table, events in strict timestamp order.
  • Status glyphs inline: ok, error, ⚠️ warning/unpaired, gap, ♻️ compaction, 🚩 missing bookend.
  • Currency in USD to 4 decimals.
  • Cite only event data returned by the API — do not invent timestamps or summaries.
  • If the dashboard is unreachable, tell the user to start it with npm start from the repo root.