Telemetry Inspect

/ork:telemetry-inspect

One-shot health check for OrchestKit's telemetry pipeline. Reports writer activity, file sizes, schema lock coverage, orphan files, and growth warnings. Use when verifying the pipeline is flowing correctly or debugging a missing writer.

When to use

• Before or after a risky hook refactor, to prove telemetry still writes as expected
• Weekly health check on a long-running project
• When /ork:analytics output looks suspicious — inspect the underlying data first
• When adding a new telemetry file and wanting to confirm it's picked up
• Auditing which files are schema-locked vs. drift-vulnerable

What it checks

1. Writer activity — for each registered telemetry file, recent write count (from mtime scan) and last-write delta 2. File health — size (warn at 256 KB, critical at 1 MB), line count, mtime 3. Schema lock status — which files have validators in lib/telemetry-schemas.ts 4. Orphan detection — files on disk under .claude/{telemetry,logs,state,feedback}/ that aren't in the registry (possible stale writer or new file needing schema) 5. Growth trend — bytes per hour since session start (fire alert if > 100 KB/hr) 6. Coordination layer (M168) — live counts from sessions.db (running sessions, held locks, pending worktree links, skill invocations) plus write throughput from coordination-metrics.jsonl

Usage

/ork:telemetry-inspect
/ork:telemetry-inspect --session sess-abc123
/ork:telemetry-inspect --json

Default mode: terminal-friendly ASCII report. --json emits a structured result suitable for piping into another tool or uploading.

Output shape (ASCII mode)

Telemetry Health — 2026-04-23 13:45
────────────────────────────────────

Schema-locked files (7)
  .claude/telemetry/pre-compact-decisions.jsonl  ◆ 3 lines  1.1 KB  ✓ healthy
  .claude/telemetry/image-responses.jsonl        ◆ 0 lines  —       ✗ no writes
  .claude/logs/decisions.jsonl                   ◆ 18 lines 12 KB   ✓ healthy
  .claude/logs/subagent-spawns.jsonl             ◆ 6 lines  3 KB    ✓ healthy
  .claude/state/edit-history.jsonl               ◆ 94 lines 412 KB  ⚠ rotate
  .claude/state/ork-metrics-*.json               ◆ (N/A)    2.1 KB  ✓ healthy
  .claude/feedback/skill-usage.json              ◆ (N/A)    1.2 KB  ✓ healthy

Unlocked telemetry files (14)
  .claude/feedback/changelog-decisions.json      ○ 4 KB    ✗ no schema
  .claude/feedback/code-style-profile.json       ○ 8 KB    ✗ no schema
  (...14 more...)

Orphan files (0)
  (none detected)

Summary
  Pipeline health:  GREEN  (21/21 expected writers active)
  Schema coverage:  7/21 (33%)
  Largest file:     edit-history.jsonl (412 KB)
  Hotspot:          edit-history.jsonl  +40 KB/hr

Implementation plan (for an agent/LLM running this skill)

1. List known files — read lib/telemetry-schemas.ts's SCHEMA_LOCKED inventory for the 7 locked paths. Extend with a hardcoded inventory of the other 14 unlocked paths (copy from the skill-local references/telemetry-inventory.md). 2. For each file:

• Use Glob to resolve .claude/state/ork-metrics-*.json pattern → may be multiple
• Use Read with limit: 10 to see shape and Bash wc -l for line count
• Use Bash stat for mtime + size

3. Classify health:

• size > 1 MB → critical
• size > 256 KB → warn
• mtime > 7 days → "no recent writes"
• line count 0 → "no writes"

4. Orphan scan — Bash find .claude/{telemetry,logs,state,feedback} -type f cross-check against registered paths. Any on-disk files not in inventory → orphan. 5. Render report — ASCII table by default, JSON if --json argument passed.

Core logic is deterministic + read-only. Do NOT write to any telemetry file — this skill is an observer.

Coordination layer (M168 #1915)

The SQLite coordination layer lives outside `.claude/`, at ~/.local/state/orchestkit/:

Live counts — the DB file is a standard SQLite database; read it with sqlite3 (read-only SELECTs only):

DB="$HOME/.local/state/orchestkit/sessions.db"
[ -f "$DB" ] || echo "coordination layer idle (no multi-session activity yet)"
sqlite3 "$DB" "SELECT COUNT(*) FROM sessions WHERE status='running'"                  # live sessions
sqlite3 "$DB" "SELECT COUNT(*) FROM locks WHERE expires_at > strftime('%s','now')"    # held locks
sqlite3 "$DB" "SELECT COUNT(*) FROM worktree_links WHERE result_status IS NULL"       # pending worktrees
sqlite3 "$DB" "SELECT COUNT(*) FROM skill_invocation"                                 # skill invocations

Write throughput — coordination-metrics.jsonl is append-only {ts, metric, count} lines emitted async by lib/metrics-emitter.ts on every sessions.db write. Event rate ≈ recent sessions_db_write lines:

M="$HOME/.local/state/orchestkit/coordination-metrics.jsonl"
[ -f "$M" ] && tail -200 "$M" | grep -c '"sessions_db_write"'

Degrade gracefully: if sqlite3 is absent or the DB / metrics file doesn't exist, report "coordination layer idle" — never error. Like the rest of this skill, these are read-only observations.

Upstream OTel metric notes

When inspecting Claude Code's own OTel metrics (downstream of this skill — claude_code.* in your collector):

• CC 2.1.129+: claude_code.pull_request.count now also counts PRs/MRs filed via MCP tools (e.g., GitHub MCP create_pull_request), not just shell commands run through the Bash tool. Dashboards built before 2.1.129 will see a step-function increase at the cutover — annotate, don't alert. See references/../monitoring-observability/references/metrics-collection.md for the join pattern that distinguishes MCP- from shell-filed PRs.
• CC 2.1.161+: OTEL_RESOURCE_ATTRIBUTES values are now attached as labels on all metric datapoints, enabling dimensional slicing (team, repo, environment). Existing dashboards keep working; new dashboards should use label selectors to segment usage.
• CC 2.1.145+: claude_code.tool OTEL spans carry agent_id + parent_agent_id, and background subagent spans nest under the dispatching Agent tool span. Build the trace tree by querying on parent_agent_id — enables per-skill fan-out timing and cost attribution for multi-agent skills (brainstorm, explore, implement); no schema change needed.
• CC 2.1.174+: /usage exposes CC-native per-component attribution — cache misses, long context, subagents, and per-skill/agent/plugin/MCP cost breakdowns over 24h/7d (surfaced first in the VSCode Account & usage dialog). Treat it as a cross-check source in the health report: if ork telemetry shows a skill/agent active but CC attribution shows zero usage for it (or vice versa), flag the divergence as a possible missing writer or stale install rather than trusting either side alone.

Related

• lib/telemetry-schemas.ts — source of truth for schema-locked paths
• /ork:analytics — aggregates data across sessions (different use case)
• M121 "Observability Consolidation" milestone

OrchestKit Telemetry File Inventory

Single source of truth listing every known file that OrchestKit hooks write to. The telemetry-inspect skill reads this inventory to distinguish "expected" files from orphans.

Last updated: 2026-04-23 (M121 #1491)

Schema-locked files (7) — validators in src/hooks/src/lib/telemetry-schemas.ts

Unlocked telemetry files (14) — no schema validator yet

.claude/feedback/ (8)

.claude/logs/ (3)

.claude/state/ (2)

Directory health budgets

How to add a new telemetry file

1. Add the writer (hook) that produces it 2. Add an entry to the appropriate section above 3. If the file has a stable shape, add a validator to lib/telemetry-schemas.ts + promote to Schema-locked table 4. Update the SCHEMA_LOCKED array export 5. Add tests to __tests__/lib/telemetry-schemas.test.ts