telemetry

A dashboard for tracking coding-session costs, spending totals, hook activity, trust level, and telemetry settings. Telemetry is information recorded about what the coding system does and how much it costs.

In plain words
What is it for?
Use it to view session or overall spending, inspect recent hook runs, change telemetry settings, or verify telemetry records.
Why use it?
It puts cost and activity information in one place instead of making you inspect separate records or commands. It can also check telemetry records for tampering.

Skill for Claude CodeCodex

Part of the Citadel plugin — 48 skills, 7 agents, 2 MCP servers shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/sethgammon/citadel/telemetry
Any agent
npx skills add SethGammon/Citadel --skill telemetry
Clone the repo
git clone --depth 1 https://github.com/SethGammon/Citadel

Made for: Claude Code, Codex.

Or install Citadel, the plugin that ships this one along with the rest of its 48 skills, 7 agents, 2 MCP servers.

Per session 68 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,994 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00068 $0.02994
Opus 5 $0.00034 $0.01497
Sonnet 5 $0.00014 $0.00599
Haiku 4.5 $0.00007 $0.00299

Measured 3d ago against content hash c582bfb29d0d, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

telemetry scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/telemetry/SKILL.md · 275 lines

How it starts

The opening of the file, as written. The whole thing — 275 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/telemetry — Telemetry Hub

When to Use

  • "What does Citadel track?" / "What telemetry does it have?"
  • "What did this session cost?" / "How much have I spent?"
  • "How do I turn off the cost alerts?" / "Can I disable telemetry?"
  • "Show me hook activity" / "What hooks fired?"
  • "What trust level am I at?"
  • Directly: /telemetry

Routed here by /do for: "telemetry", "what did this cost", "session stats", "session cost", "how much did that cost", "what hooks fired", "trust level", "show me telemetry", "cost breakdown", "spending".

Commands

Command Behavior
/telemetry Full hub — stats + command directory + settings
/telemetry --costs Cost section only: session, today, all-time, by campaign
/telemetry --hooks Hook activity only: last 20 fires with timing and outcomes
/telemetry --verify Telemetry and artifact integrity check: verify hashes/signatures, flag tampered records, report legacy records
/telemetry --config Show current telemetry settings from harness.json
/telemetry off Disable session summary, reduce hook verbosity
/telemetry on Re-enable all telemetry
/telemetry --threshold N Set cost alert threshold step (e.g. --threshold 10 = alert every $10)

Protocol

Step 1: COLLECT DATA

Read the following in parallel. All are optional — treat missing files as zero/empty.

Live session cost:

  • Run node scripts/session-tokens.js --today 2>/dev/null — captures real token data
  • If unavailable, read .planning/telemetry/cost-tracker-state.json for burn rate
  • Real cost is always preferred over estimated. Mark clearly: $X.XX vs $X.XX (est)

Historical costs:

  • Run node scripts/session-tokens.js --all 2>/dev/null for all-time real totals
  • Read last 20 lines of .planning/telemetry/session-costs.jsonl for recent sessions
  • For each entry: prefer real_cost > override_cost > estimated_cost

Hook activity:

  • Read last 20 lines of .planning/telemetry/hook-timing.jsonl
  • For each event: "timing" entry: extract hook, duration_ms, timestamp
  • For each event: "counter" entry: extract hook, metric
  • Check .planning/telemetry/hook-errors.jsonl (last 20 lines) for recent blocks

Read the full file on GitHub · 275 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 275 lines · 68 tokens per session scan A c582bfb29d0d

Subscribe to this mod's changes

telemetry is a skill published in the GitHub repository SethGammon/Citadel (914 stars, last pushed 6d ago), licensed MIT. It adds 68 tokens to every session and 2,994 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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