Querying Tempo
tempoxyz/tidx
Query indexed Tempo chain data via tidx HTTP API and CLI. An agent skill from tempoxyz/tidx.
Workflow for optimizing ClickHouse and HogQL queries. An agent skill from PostHog/posthog.
Install Optimizing Clickhouse And Hogql Queries
$ npx skills add PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install PostHog/posthog optimizing-clickhouse-and-hogql-queries --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/PostHog/posthog.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/optimizing-clickhouse-and-hogql-queries .claude/skills/optimizing-clickhouse-and-hogql-queries && 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 "optimizing-clickhouse-and-hogql-queries" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queries into .claude/skills/optimizing-clickhouse-and-hogql-queries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimizing-clickhouse-and-hogql-queries", 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/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queriesType 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 PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install PostHog/posthog optimizing-clickhouse-and-hogql-queries --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/optimizing-clickhouse-and-hogql-queries .agents/skills/optimizing-clickhouse-and-hogql-queries && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "optimizing-clickhouse-and-hogql-queries" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queries into .agents/skills/optimizing-clickhouse-and-hogql-queries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimizing-clickhouse-and-hogql-queries", 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 PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install PostHog/posthog optimizing-clickhouse-and-hogql-queries --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/optimizing-clickhouse-and-hogql-queries .cursor/skills/optimizing-clickhouse-and-hogql-queries && 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 "optimizing-clickhouse-and-hogql-queries" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queries into .cursor/skills/optimizing-clickhouse-and-hogql-queries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimizing-clickhouse-and-hogql-queries", 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/PostHog/posthog.git --path .agents/skills/optimizing-clickhouse-and-hogql-queries--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 PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install PostHog/posthog optimizing-clickhouse-and-hogql-queries --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/optimizing-clickhouse-and-hogql-queries .gemini/skills/optimizing-clickhouse-and-hogql-queries && 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 "optimizing-clickhouse-and-hogql-queries" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queries into .gemini/skills/optimizing-clickhouse-and-hogql-queries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimizing-clickhouse-and-hogql-queries", 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 PostHog/posthog optimizing-clickhouse-and-hogql-queriesInstalls 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 PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/optimizing-clickhouse-and-hogql-queries .github/skills/optimizing-clickhouse-and-hogql-queries && 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 "optimizing-clickhouse-and-hogql-queries" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queries into .github/skills/optimizing-clickhouse-and-hogql-queries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimizing-clickhouse-and-hogql-queries", 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 PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install PostHog/posthog optimizing-clickhouse-and-hogql-queries --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/PostHog/posthog.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/optimizing-clickhouse-and-hogql-queries .opencode/skills/optimizing-clickhouse-and-hogql-queries && 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 "optimizing-clickhouse-and-hogql-queries" agent skill from https://github.com/PostHog/posthog/tree/master/.agents/skills/optimizing-clickhouse-and-hogql-queries into .opencode/skills/optimizing-clickhouse-and-hogql-queries/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "optimizing-clickhouse-and-hogql-queries", 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.
Facts
- Skill name
optimizing-clickhouse-and-hogql-queries- GitHub stars
- 40k
- Token cost
- ~5.7k tokens
- SKILL.md length
- 2,329 words
- Files
- 3 (incl. references)
- Skills in repo
- 252
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Workflow for optimizing ClickHouse and HogQL queries. An agent skill from PostHog/posthog.
- Works in 6 steps: confirm you're at the right layer → get the ClickHouse SQL → scan for the common smells → …
- Report is too slow
- SKILL.md covers Optimizing every query a team…, Step 0: confirm you're at the…, Background: read these once and Step 1: get the ClickHouse SQL, plus 7 more sections
- Needs ANTHROPIC_API_KEY
What it does
Optimizing Clickhouse And Hogql Queries is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Workflow for optimizing ClickHouse and HogQL queries. Use when a HogQL query, query runner, insight, or report is too slow; when a hand-written ClickHouse query (via syncexecute or in a migration) is too slow; when ClickHouse times out or hits memory limits; when investigating a slow system.querylog row; or when reviewing a proposed HogQL printer change for performance. Covers extracting the ClickHouse SQL, common smells (FROM ... FINAL, JSONExtract over properties, missing skip indexes, self-joins, CTE blow-up)…
Its SKILL.md is about 5.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including reference files (for example `references/investigation-playbook.md` and `references/learnings.md`).
It sits in Databases, covering Data warehousing and REST APIs. It works with ClickHouse, SQL, PostgreSQL and Django. The repository describes itself as: :hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error…
When your agent uses it
- Report is too slow
- A hand-written ClickHouse query (via syncexecute
- In a migration) is too slow
- ClickHouse times out
Example prompts
- “/optimizing-clickhouse-and-hogql-queries”
Requirements
- Python 3
Workflow steps
6 steps, taken from the step headings in SKILL.md.
- confirm you're at the right layer
- get the ClickHouse SQL
- scan for the common smells
- run EXPLAIN
- measure for real
- apply the optimization
What it can do on your machine
Read from SKILL.md and the folder at commit 812e5c6. It shows what the files ask for, not the result of running them.
Tool permissions
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.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
clickhouse.comgithub.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
ANTHROPIC_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Optimizing Clickhouse And Hogql Queries loads about 5.7k tokens when it runs, and up to ~16k if it reads all its reference files. Until then it costs about 197 tokens; SKILL.md has 2,329 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.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated 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.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 2,329 words (~5,700 tokens).
“Optimizes ClickHouse and HogQL queries (HogQL compiles to ClickHouse), not Postgres / Django ORM. For an app-DB query (Model.objects.filter(...)), stop and use profiling-slow-api-endpoints; Step 0 has the full triage.”
- name
- optimizing-clickhouse-and-hogql-queries
Files
SKILL.md and 2 other files (references) in .agents/skills/optimizing-clickhouse-and-hogql-queries of PostHog/posthog.
- SKILL.md
- references/investigation-playbook.md
- references/learnings.md
Open the folder on GitHubat commit 812e5c6
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders. This page covers the copy in PostHog/posthog, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Optimizing Clickhouse And Hogql Queries 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 |
|---|---|---|---|---|---|---|
| Optimizing Clickhouse And Hogql Queries this skillPostHog/posthog | 40k | — | ~5.7k | Automated safety check: Pass | Custom licence | |
| Querying Tempotempoxyz/tidx | 107 | — | ~3.1k | Automated safety check: Pass | MIT | |
| Clickhouse Logs Queriessupabase/supabase | 111k | — | ~2.4k | Automated safety check: Pass | Apache-2.0 | |
| Chdb SQLvemetric/vemetric | 395 | 1 repos | ~1.2k | Automated safety check: Pass | Apache-2.0 | |
| Semantic Analystsidequery/sidemantic | 129 | — | ~982 | Automated safety check: Pass | AGPL-3.0 | |
| Database MigrationRain-kl/OpenFlare | 288 | — | ~1.3k | Automated safety check: Pass | Apache-2.0 |
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Related
Works with
Categories
Questions about Optimizing Clickhouse And Hogql Queries
What does Optimizing Clickhouse And Hogql Queries do?
Workflow for optimizing ClickHouse and HogQL queries. An agent skill from PostHog/posthog. Optimizing Clickhouse And Hogql Queries is an agent skill from PostHog/posthog, published by the product's own GitHub organization. Workflow for optimizing ClickHouse and HogQL queries.
When should I use Optimizing Clickhouse And Hogql Queries?
Optimizing Clickhouse And Hogql Queries fits situations like: report is too slow; A hand-written ClickHouse query (via syncexecute; in a migration) is too slow; clickHouse times out.
How do I install Optimizing Clickhouse And Hogql Queries in Claude Code?
Run `npx skills add PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a claude-code`. Or copy the skill folder (.agents/skills/optimizing-clickhouse-and-hogql-queries in PostHog/posthog) into .claude/skills/optimizing-clickhouse-and-hogql-queries in your project. Claude Code loads it when a task matches its description.
How do I install Optimizing Clickhouse And Hogql Queries in Codex?
Run `npx skills add PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a codex`. Or copy the skill folder (.agents/skills/optimizing-clickhouse-and-hogql-queries in PostHog/posthog) into .agents/skills/optimizing-clickhouse-and-hogql-queries in your project. Codex loads it when a task matches its description.
Can I use Optimizing Clickhouse And Hogql Queries in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add PostHog/posthog --skill optimizing-clickhouse-and-hogql-queries -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/optimizing-clickhouse-and-hogql-queries, .gemini/skills/optimizing-clickhouse-and-hogql-queries, .github/skills/optimizing-clickhouse-and-hogql-queries and .opencode/skills/optimizing-clickhouse-and-hogql-queries in your project.
What does Optimizing Clickhouse And Hogql Queries need to run?
Going by SKILL.md and its folder, Optimizing Clickhouse And Hogql Queries needs credentials named ANTHROPIC_API_KEY. Our summary lists: Python 3.
Does Optimizing Clickhouse And Hogql Queries access the network?
SKILL.md names 2 domains. As links in the text: clickhouse.com and github.com. This is read from the text; nothing was executed.
Is Optimizing Clickhouse And Hogql Queries safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Optimizing Clickhouse And Hogql Queries use?
Optimizing Clickhouse And Hogql Queries has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Optimizing Clickhouse And Hogql Queries use?
About 5.7k tokens (SKILL.md is roughly 23k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 11k tokens, read only when the agent opens those files.
What are the alternatives to Optimizing Clickhouse And Hogql Queries?
Skills that share tags, products or a category with Optimizing Clickhouse And Hogql Queries: Querying Tempo (tempoxyz/tidx, 107 stars), Clickhouse Logs Queries (supabase/supabase, 111k stars), Chdb SQL (vemetric/vemetric, 395 stars) and Semantic Analyst (sidequery/sidemantic, 129 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Optimizing Clickhouse And Hogql Queries?
PostHog (a GitHub organization, an official publisher) maintains it in PostHog/posthog, which has 40,200 GitHub stars. The repository holds 252 skills in this directory. The repository was last updated on October 9, 2026.
Source: PostHog/posthog on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.