MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Unified telemetry hub. An agent skill from SethGammon/Citadel.
The automated check flagged lines worth reading first. See the safety section below.
$ npx skills add SethGammon/Citadel --skill telemetry -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install SethGammon/Citadel telemetry --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/telemetry .claude/skills/telemetry && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "telemetry" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/telemetry into .claude/skills/telemetry/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "telemetry", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/SethGammon/Citadel/tree/main/skills/telemetryType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add SethGammon/Citadel --skill telemetry -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install SethGammon/Citadel telemetry --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/telemetry .agents/skills/telemetry && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "telemetry" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/telemetry into .agents/skills/telemetry/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "telemetry", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add SethGammon/Citadel --skill telemetry -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install SethGammon/Citadel telemetry --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/telemetry .cursor/skills/telemetry && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "telemetry" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/telemetry into .cursor/skills/telemetry/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "telemetry", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/SethGammon/Citadel.git --path skills/telemetry--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add SethGammon/Citadel --skill telemetry -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install SethGammon/Citadel telemetry --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/telemetry .gemini/skills/telemetry && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "telemetry" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/telemetry into .gemini/skills/telemetry/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "telemetry", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install SethGammon/Citadel telemetryInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add SethGammon/Citadel --skill telemetry -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/telemetry .github/skills/telemetry && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "telemetry" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/telemetry into .github/skills/telemetry/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "telemetry", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add SethGammon/Citadel --skill telemetry -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install SethGammon/Citadel telemetry --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/telemetry .opencode/skills/telemetry && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "telemetry" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/telemetry into .opencode/skills/telemetry/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "telemetry", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
telemetryUnified telemetry hub. An agent skill from SethGammon/Citadel.
Telemetry is an agent skill from SethGammon/Citadel. Unified telemetry hub. Shows current session cost, today's spend, all-time totals, hook activity, trust level, and a directory of every telemetry command available. Also the control surface to toggle telemetry on/off and tune thresholds. Single entry point for anyone asking "what does this cost" or "what telemetry does Citadel have".
Its SKILL.md is about 2.9k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows. The repository describes itself as: The operating layer for Claude Code + OpenAI Codex: persistent project memory, intent routing, safety hooks, cost telemetry, and parallel agent fleets. The licence is MIT.
4 steps, taken from the step headings in SKILL.md.
Read from SKILL.md and the folder at commit e41ff1d. It shows what the files ask for, not the result of running them.
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Shell commands in SKILL.md call:
nodedockergitFrom the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md. Its commands use docker and git, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Telemetry loads about 2.9k tokens when it runs. Until then it costs about 86 tokens; SKILL.md has 970 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
The automated check found patterns that need a careful read before installing.
- `/telemetry off` must NOT disable safety hooks — make this explicit in outputAutomated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
The full file from SethGammon/Citadel at commit e41ff1d, republished under its MIT licence (© SethGammon). 970 words, ~2,942 tokens.
.claude/skills/telemetry/SKILL.md (or your agent's skills folder)./telemetryRouted 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".
| 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 $10) |
Read the following in parallel. All are optional — treat missing files as zero/empty.
Live session cost:
node scripts/session-tokens.js --today 2>/dev/null — captures real token data.planning/telemetry/cost-tracker-state.json for burn rate$X.XX vs $X.XX (est)Historical costs:
node scripts/session-tokens.js --all 2>/dev/null for all-time real totals.planning/telemetry/session-costs.jsonl for recent sessionsreal_cost > override_cost > estimated_costHook activity:
.planning/telemetry/hook-timing.jsonlevent: "timing" entry: extract hook, duration_ms, timestampevent: "counter" entry: extract hook, metric.planning/telemetry/hook-errors.jsonl (last 20 lines) for recent blocksTrust level:
.claude/harness.json (Citadel's shared config path for all runtimes, including Codex) → trust objecttrust.override set, use thatSettings:
.claude/harness.json → telemetry objectOutput this format. Omit a section only if the data source is completely unavailable.
=== Citadel Telemetry ===
CURRENT SESSION
Cost: $X.XX [real] | $X.XX (est)
Duration: N min | $X.XX/min burn rate
Tokens: NNK input | NK output | NK cache read | NK cache write
Messages: N
Agents: N spawned
Hooks fired: N (today)
TODAY
$X.XX across N sessions
Most expensive: {slug or "unattached"} — $X.XX
ALL TIME
$X.XX across N sessions, N campaigns
Cache savings: ~$X.XX (cache reads vs full input price)
BY CAMPAIGN (recent 5)
{slug}: $X.XX — N sessions
_unattached: $X.XX — N sessions
HOOK ACTIVITY (last 10 fires)
{relative time} | {hook} | {duration_ms}ms | {outcome}
(no hook timing recorded yet)
TRUST LEVEL
Level: {novice | familiar | trusted}
Sessions: N completed
Campaigns: N completed
(novice = 0-4 sessions | familiar = 5-19 | trusted = 20+ with 2+ campaigns)
TELEMETRY SETTINGS
Enabled: {true | false}
Session summary: {auto | always | off} ← the [session] line at session end
Cost alerts: {on | off} at thresholds: {list or "default ($5,$15,$30...)"}
Hook timing: {on | off}
Audit log: {on | off}
— or, when harness.json is absent —
(harness.json not found — defaults active)
→ Run /do setup to unlock cost tracking, configure thresholds, and register your install.
COMMAND DIRECTORY
/telemetry This screen
/telemetry --costs Cost breakdown only
/telemetry --hooks Hook activity only
/telemetry --verify Telemetry/artifact integrity check (hash/signature verification)
/cost Deep cost exploration by session/campaign/week
/dashboard Full harness state (campaigns, fleet, all costs)
node scripts/session-tokens.js --today Today's sessions with exact token counts
node scripts/session-tokens.js --all All-time totals (real data, not estimates)
cat .planning/telemetry/session-costs.jsonl Raw session cost log
cat .planning/telemetry/hook-timing.jsonl Raw hook execution log
cat .planning/telemetry/audit.jsonl Raw tool call audit log
CONTROLS
/telemetry off Disable session summary + reduce verbosity
/telemetry on Re-enable
/telemetry --threshold N Alert every $N (writes to harness.json)
/telemetry --config Edit settings interactively/telemetry off: Set telemetry.sessionSummary = "off" and telemetry.costAlerts = false in harness.json. Output: "Telemetry summary disabled. Hook safety checks remain active." Safety hooks (protect-files, circuit-breaker, external-action-gate) are never disabled.
/telemetry on: Set telemetry.sessionSummary = "auto" and telemetry.costAlerts = true. Output: "Telemetry re-enabled."
/telemetry --threshold N: Validate N is positive. Generate [N, N*2, N*5, N*10, N*20, N*50, N*100] (capped at 500). Write to harness.json under policy.costTracker.thresholds.
/telemetry --verify: Run the project verifier:
node scripts/verify-telemetry-integrity.jsThe verifier scans .planning/telemetry/*.jsonl and .planning/artifacts/*.jsonl. Display verified, signed, legacy, tampered, invalid, and signature-warning counts. Use --strict-legacy only when old unsigned records should fail the check.
Output format:
=== Telemetry Integrity ===
file.jsonl
Total records: N
Verified (hash): N
Verified (signed): N
Legacy (no hash): N
TAMPERED: N
Invalid JSON: N
Signature warnings: N
Status: CLEAN or FAILEDIf any tampered records: list each with timestamp, event, and both the stored and expected hash (first 16 chars each). Tampering can indicate log corruption, manual edits, or a bug — not necessarily malicious.
If only legacy records (no tampered): note "Legacy records were written before telemetry integrity hashing was added. New telemetry and artifact records are hashed automatically."
/telemetry --config: Show current settings with the node -e "..." command to change each — don't auto-apply.
Always mark data source clearly:
[real] — data from Claude Code's native session JSONL (exact)(est) — estimated from the fallback model ($1 base + $0.50/agent + $0.10/min)(override) — manually entered by the userNever blend real and estimated in the same total without flagging it.
Covered: session cost (real token data), duration/burn rate/message count, agent spawn count, hook timing and outcomes, campaign cost attribution, trust level.
Not covered (by design): per-tool-call cost, per-subagent cost isolation, real-time streaming token count.
Safety hooks always on (cannot be disabled): protect-files, external-action-gate, circuit-breaker, quality-gate.
The JSONL files under .planning/telemetry/ stay canonical. For standard observability
stacks, scripts/telemetry-otlp-export.js translates new records into OTLP/HTTP JSON
metrics and POSTs them to a collector. Byte offsets per source file live in
.planning/telemetry/otlp-export-state.json, so repeat runs export only new records.
# Preview the OTLP payload without sending or advancing state
node scripts/telemetry-otlp-export.js --dry-run
# Export new records to a local collector (/v1/metrics appended when the url has no path)
node scripts/telemetry-otlp-export.js --endpoint http://localhost:4318| Metric | Type | Source file |
|---|---|---|
citadel.session.cost.usd | sum (delta), session.id / cost.source attributes | session-costs.jsonl |
citadel.session.tokens | sum (delta), token.type attribute | session-costs.jsonl |
citadel.hook.duration.ms | gauge, hook.name attribute | hook-timing.jsonl |
citadel.agent.runs | sum (delta), run.status / run.event attributes | agent-runs.jsonl |
--reset clears the offsets for a full re-export. On a non-2xx response or network
error the exporter exits 1 without advancing state, so the next run retries the same
records. Data point timestamps come from the JSONL records, never the current clock.
Test with node scripts/test-telemetry-otlp.js.
Local collector demo: examples/otel-collector/ contains a ready-made collector
config (OTLP HTTP receiver on 4318, debug exporter to stdout) and a README with the
two-command flow: docker run with the config mounted, then
node scripts/telemetry-otlp-export.js --endpoint http://localhost:4318. Without
Docker, --dry-run prints the exact OTLP payload instead.
/telemetry off must NOT disable safety hooks — make this explicit in output.planning/telemetry/ missing: Show empty state with "Run /do setup to initialize telemetry."session-tokens.js unavailable: Fall back to session-costs.jsonl; mark (est).telemetry.enabled: false: Show banner "Telemetry is disabled. Run /telemetry on to re-enable."--verify with missing files: Report "No telemetry or artifact JSONL files found." Not an error.--verify when scripts/verify-telemetry-integrity.js is unavailable: Report that the verifier is missing and show the raw file paths to inspect; do not claim hash verification ran.Disclosure: Read-only by default. --threshold, off, on, --config write harness.json.
Reversibility: amber — harness.json writes; undo with git checkout .claude/harness.json.
Trust gates: Any — no restrictions.
/telemetry does not produce a HANDOFF block. It is a read-only observability
tool (except for --threshold, off, on, --config which write harness.json).
After displaying output, wait for the next user command.
© SethGammon, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Just SKILL.md in skills/telemetry of SethGammon/Citadel.
Open the folder on GitHubat commit e41ff1d
Telemetry next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Telemetry this skillSethGammon/Citadel | 922 | — | ~2.9k | Automated safety check: Warn | MIT | |
| MCP Server Builderanthropics/skills | 180k | 62 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 37k | 11 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 34 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 296k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 37k | 8 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 |
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
farm-fe/farm
A skill your agent uses when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
obra/superpowers
Has the agent carry out an implementation plan itself, task by task in the current session, keeping a ledger, proving each step with a test and ending with one whole-branch review.
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
Azure/azqr
Create new skills, modify and improve existing skills, and measure skill performance.
SethGammon/Citadel
Creates new skills from the user's repeating patterns. An agent skill from SethGammon/Citadel.
SethGammon/Citadel
Cross-drive storage audit and cleanup. An agent skill from SethGammon/Citadel.
SethGammon/Citadel
Bounded foreground repetition for the current session. An agent skill from SethGammon/Citadel.
SethGammon/Citadel
GitHub issue and PR investigator. An agent skill from SethGammon/Citadel.
SethGammon/Citadel
File sentinel that monitors the working directory for changes and marker comments, then auto-triggers appropriate skills.
SethGammon/Citadel
Autonomous multi-session campaign agent. An agent skill from SethGammon/Citadel.
Categories
Unified telemetry hub. An agent skill from SethGammon/Citadel. Telemetry is an agent skill from SethGammon/Citadel. Unified telemetry hub.
Telemetry fits situations like: agent Workflows work in your project.
Run `npx skills add SethGammon/Citadel --skill telemetry -a claude-code`. Or copy the skill folder (skills/telemetry in SethGammon/Citadel) into .claude/skills/telemetry in your project. Claude Code loads it when a task matches its description.
Run `npx skills add SethGammon/Citadel --skill telemetry -a codex`. Or copy the skill folder (skills/telemetry in SethGammon/Citadel) into .agents/skills/telemetry in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add SethGammon/Citadel --skill telemetry -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/telemetry, .gemini/skills/telemetry, .github/skills/telemetry and .opencode/skills/telemetry in your project.
Going by SKILL.md and its folder, Telemetry needs the command-line tools its instructions call (node, docker and git). Our summary lists: Docker.
SKILL.md contains no URLs. Its commands use docker and git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Our automated static check of SKILL.md flagged 1 warning(s): contains instruction-override wording (e.g. “without asking the user”). Read the flagged lines before installing; the check is not a guarantee either way.
Telemetry is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
About 2.9k tokens (SKILL.md is roughly 12k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Telemetry: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 37k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 296k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
SethGammon (a GitHub user) maintains it in SethGammon/Citadel, which has 922 GitHub stars. The repository holds 48 skills in this directory. The repository was last updated on October 1, 2026.
Source: SethGammon/Citadel on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.