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 Altinity/altinity-skills --skill altinity-expert-clickhouse-memorygit clone --depth 1 https://github.com/Altinity/altinity-skillsWrote 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/altinity/altinity-skills/altinity-expert-clickhouse-memory)<a href="https://agentmods.dev/skills/altinity/altinity-skills/altinity-expert-clickhouse-memory"><img src="https://agentmods.dev/badge/skills/altinity/altinity-skills/altinity-expert-clickhouse-memory/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/altinity/altinity-skills/altinity-expert-clickhouse-memory"><img src="https://agentmods.dev/badge/skills/altinity/altinity-skills/altinity-expert-clickhouse-memory.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 | $0.00069 | $0.01404 |
| Opus 5.5 | $0.00028 | $0.00562 |
| Sonnet 5.5 | $0.00014 | $0.00281 |
| Haiku 4.5 | $0.00007 | $0.00140 |
Grade A, and why
altinity-expert-clickhouse-memory 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Memory usage and OOM diagnostics
Answers "where is the RAM going, and what will OOM next?" from system.asynchronous_metrics, system.metrics, system.dictionaries, system.parts, system.server_settings and system.query_log.
Run altinity-expert-clickhouse-connection first if the connection mode, cluster and time window are not yet established.
Query packs
checks.sql— 15 checks: RAM total vs ClickHouse resident, component breakdown (dictionaries, Memory/Set/Join tables, primary keys, caches), allocation audit, top memory consumers among queries, dictionaries, Memory-engine tables and primary keys, memory over time, MEMORY_LIMIT_EXCEEDED exceptions, a query plus part_log memory timeline, server memory settings, memory used by non-ClickHouse processes, and high-memory GROUP BY and JOIN query shapes. Check memory-08 needssystem.asynchronous_metric_logand memory-11 needssystem.part_log; skip them when those tables are absent.reference.md— background (settings, sizing, anti-patterns); read only when you need to explain a recommendation.
How to run the query packs
- Read each pack file from this skill's directory (the skill loader prints the directory path).
- Run statements one at a time, never a whole file. Statements end with
;and start with a-- @check <id> <title>header; keep the id with its result. - Honor
-- @requires: skip the statement when the named table is missing, whenkeeperis required and the server has no Keeper/ZooKeeper, or when the version condition is not met. List skipped ids with the reason. - Keep
{cluster}as written when a cluster macro exists; otherwise apply the connection skill's rewrite rule. Any other{placeholder}is a template variable: substitute a real value first or skip the statement. - On an error, record the check id and the first line of the error, then continue. Only for
UNKNOWN_IDENTIFIER, runDESCRIBE TABLE system.<table>and drop the missing column. - A
severitycolumn is the verdict for that row. Copy it; do not re-grade.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · -9 lines · +32 tokens per session 404ccdf35229
- 1mo ago First seen · 77 lines · 37 tokens per session scan A 47fd8ea86d34
altinity-expert-clickhouse-memory is a skill published in the GitHub repository Altinity/altinity-skills (17 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 69 tokens to every session and 1,404 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 2026-08-30.
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