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)

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.

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