headcount is an organization of independently installable Claude Code plugins, each grouping skills for a department such as finance, security, or demand generation. Claude Code users install the departments they need and invoke their skills for specialized work; the catalogue entries are skills and related agent tooling from that organization.
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.
npx skills add cbrock84/headcount --skill observability-and-reliabilitygit clone --depth 1 https://github.com/cbrock84/headcountWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/cbrock84/headcount/observability-and-reliability)<a href="https://agentmods.dev/skills/cbrock84/headcount/observability-and-reliability"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/observability-and-reliability/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/cbrock84/headcount/observability-and-reliability"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/observability-and-reliability.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00072 | $0.00695 |
| Opus 5.5 | $0.00029 | $0.00278 |
| Sonnet 5.5 | $0.00014 | $0.00139 |
| Haiku 4.5 | $0.00007 | $0.00069 |
Grade A, and why
observability-and-reliability 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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 73 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Observability and reliability
Monitoring tells you a thing you predicted is happening. Observability lets you ask a question you did not anticipate. Production failures are mostly the unanticipated kind.
Instrument for questions you have not thought of yet
Emit structured events with enough context to slice afterwards — request identifiers, user or tenant, version, dependency, outcome, duration. Free-text logs are unsearchable at volume and become expensive noise.
Propagate a correlation identifier across every hop. Without it, a distributed system is a set of independent stories and reconstructing one request is manual archaeology.
Measure what the user experiences at the percentile they experience it. A p50 latency graph is mostly a graph of the people who were not affected.
Alert on symptoms, not causes
Alert when users are affected or imminently will be. High CPU is not an alert; requests failing or slowing is. Cause-based alerting produces pages for conditions the system handled and no page for novel failures that hurt.
Every alert must be actionable, urgent and specific. If the recipient's honest response is to look and close it, delete the alert — it is training the on-call to ignore the page, and the ignored page is eventually the real one.
Alert fatigue is the actual reliability risk in most organizations. Fewer, better alerts beat coverage.
Objectives and error budgets
Set service level objectives from what users need, then treat the remainder as a budget to spend. This converts a sterile argument between shipping and stability into arithmetic: budget remaining means ship, budget exhausted means the next work is reliability.
Keep the internal objective tighter than any external commitment made through
operations:service-level-management, so you find out before the customer does.
Learn from incidents
Post-incident review exists to find what made the failure possible and hard to detect, not who touched it last. Human error is a starting question, never the finding: what made the error easy, and why did nothing catch it?
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.
- 1mo ago First seen · 73 lines · 72 tokens per session scan A f8fa5c5127ce
observability-and-reliability is a skill published in the GitHub repository cbrock84/headcount (2,077 stars, last pushed 2d ago), licensed MIT. It adds 72 tokens to every session and 695 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-09-03.
Other skills, from other repositories
launch-google-search
Launch a complete Google Ads Search campaign — campaign, ad group, responsive search ads, keywords, sitelinks, callouts, and negatives — built paused and ready to review. Use when the user wants to spin up a new Search campaign on Google Ads.
negative-keyword-sweep
Find wasted spend in Google Ads search terms and add negatives at the right scope (account list, campaign, or ad group). Use when the user says "find junk keywords", "stop wasting on bad searches", or wants a search-terms cleanup.
rotate-creative
Pause fatigued ads and ship fresh creative variants in their place. Works on both Meta and Google Ads. Use when CTR is dropping, frequency is climbing, or the user says "creative is tired" / "let's refresh ads". Always starts new variants paused.
go
Compatibility entry for Visual Stack's former /vstack:go command. Runs the wireframe and UI review tool, now called review. Use only when the user invokes /vstack:go.
save
Save durable decisions, findings, plans, and implementation knowledge from the visible Codex conversation into a new or existing NeatContext context. Use only when the user explicitly invokes this skill or asks to preserve the current conversation as reusable context.
dns
This skill should be used when the user asks about "DNS", "domain resolution", "GeoDNS / geo routing", "latency-based routing", "weighted / failover routing", "Route 53 / Cloud DNS", an "A/CNAME/ALIAS record", "anycast", or "DNS TTL / propagation". It gives the global front door that maps a name to the right IP and…