diagnose-clickhouse-errors

When Not To Use

Do not use this skill when the user's primary goal is:

• investigating application or repository source code
• tracing where failing SQL was constructed in code
• finding code paths that produced the ClickHouse error

In those cases, prefer source-code-inspection. Do not start this skill's error-code intake flow unless the user is asking for database-level diagnosis.

Workflow

1. Determine whether the user is asking for database-level diagnosis or source-code investigation. If the primary goal is source-code investigation or file-cited code analysis, stop and prefer source-code-inspection.
2. Extract the numeric ClickHouse error code from the conversation or error text (e.g. Code: 60).
3. If no numeric error code is detected and the user is asking for database-level diagnosis, call ask_user_question with exactly one question. Do NOT reply with natural-language text before the tool call.
   • header: Please provide a ClickHouse error code for diagnosis
   • options: [ { "id": "error_code", "label": "error code", "input": "text" } ]
   • Treat the returned value as the numeric error code and continue.
4. Load references/<code>.md with skill_resource (e.g. references/60.md) and follow its workflow.
5. If the orchestrator provides database context facts, use them when they materially change the cause or fix.
6. If skill_resource returns nothing, use your ClickHouse knowledge to provide a best-effort response.

Response format

• Section 1 (Cause) — One short sentence explaining why the error occurred.
• Section 2 (Fix) — Bullet list of concrete steps.
• Section 3 (Example) — A single fenced SQL block with the corrected query; omit if not applicable.

Heading rules:

• Default (English): use headings ## Cause, ## Fix, and optional ## Example.
• If a response language is specified by system policy or user message (Response language (BCP-47): …), localize the heading text to that language while keeping the same 3-section structure.
• Keep SQL, codes, and identifiers as-is.

Keep answers brief and action-first. Do not repeat the raw error verbatim. Do not add extra headings.