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-dictionariesgit 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-dictionaries)<a href="https://agentmods.dev/skills/altinity/altinity-skills/altinity-expert-clickhouse-dictionaries"><img src="https://agentmods.dev/badge/skills/altinity/altinity-skills/altinity-expert-clickhouse-dictionaries/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-dictionaries"><img src="https://agentmods.dev/badge/skills/altinity/altinity-skills/altinity-expert-clickhouse-dictionaries.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 | $0.00034 | $0.00488 |
| Opus 5 | $0.00017 | $0.00244 |
| Sonnet 5 | $0.00007 | $0.00098 |
| Haiku 4.5 | $0.00003 | $0.00049 |
Grade A, and why
altinity-expert-clickhouse-dictionaries 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 11d 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.
What it actually says
Dictionary Diagnostics
Analyze external dictionaries: configuration, memory usage, reload status, and performance.
Diagnostics
Run all queries from checks.sql in this skill's directory and analyze the results.
Dictionary Reload Operations
Force Reload (syntax reference)
-- SYSTEM RELOAD DICTIONARY {database}.{name}
-- SYSTEM RELOAD DICTIONARIES
Check Reload Result for Specific Dictionary
-- Check reload result
select
name,
status,
loading_start_time,
loading_duration,
last_exception
from system.dictionaries
where name = '{dictionary_name}'
Best Practices
Dictionary Sizing Guidelines
| Elements | Recommended Type |
|---|---|
| < 100K | Flat (if sequential keys) |
| 100K - 10M | Hashed |
| > 10M | Consider partitioning or cache |
| Complex keys | ComplexKeyHashed |
| Sparse access | Cache with SSD |
Common Issues
| Symptom | Cause | Solution |
|---|---|---|
| High memory | Too many elements | Use cache type, filter data |
| Slow reload | Large source table | Add filters, use delta updates |
| Stale data | Source unreachable | Check connectivity, add retry |
| Failed status | Source query fails | Check source table/query |
Cross-Module Triggers
| Finding | Load Module | Reason |
|---|---|---|
| High memory usage | altinity-expert-clickhouse-memory |
Overall memory analysis |
| Load failures | altinity-expert-clickhouse-overview |
Error summary + routing |
| Source connectivity | altinity-expert-clickhouse-logs |
Log investigation |
| Slow lookups | altinity-expert-clickhouse-reporting |
Query optimization |
Settings Reference
| Setting | Notes |
|---|---|
dictionaries_lazy_load |
Load on first access vs startup |
dictionary_load_wait_timeout_ms |
Wait time for lazy load |
max_dictionary_num_to_warn |
Warning threshold |
What ships with it
1 file 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.
- 11d ago First seen · 85 lines · 34 tokens per session scan A 5ad80a32cc9a
altinity-expert-clickhouse-dictionaries is a skill published in the GitHub repository Altinity/altinity-skills (16 stars, last pushed 2d ago), licensed Apache-2.0. It adds 34 tokens to every session and 488 once invoked, about $0.0002 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.
Other skills, from other repositories
fix-failing-tests
Diagnose a failing test in the googleapis/mcp-toolbox repo and land a fix by reasoning from the actual error: read the failure, reproduce it, shrink it until the cause is forced into the open, then fix the cause. Use this whenever a test or CI job is red, a build breaks after a change, many packages fail at once, or a…
triage-issues
Triage GitHub issues in the googleapis/mcp-toolbox repo: propose the correct labels (type / priority / product / status), check for duplicates, verify a bug has enough info to act on, and draft a triage comment. Use whenever a maintainer asks you to triage, label, categorize, prioritize, or "look at" an issue (or a…
postgresql-indexing
PostgreSQL indexing best practices for Prowler: index design, partial indexes, partitioned table indexing, EXPLAIN ANALYZE validation, concurrent operations, monitoring, and maintenance. Trigger: When creating or modifying PostgreSQL indexes, analyzing query performance with EXPLAIN, debugging slow queries, reviewing…
graphjin-eval
Create, extend, run, baseline, and diagnose GraphJin agent evaluations through the graphjin eval CLI.
axiom-audit-grdb-performance
Use when the user mentions GRDB performance review, slow GRDB queries, app-group database setup audit, a ValueObservation that stopped updating, or pre-release GRDB scan.
django-perf-review
Django performance code review. Use when asked to "review Django performance", "find N+1 queries", "optimize Django", "check queryset performance", "database performance", "Django ORM issues", or audit Django code for performance problems.