docs(clickhouse): connect PostgreSQL notification listener - #3375
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Navigate logical layers of code changes, visualize relationships, and explore their blast radius. 📝 SummarySummary by CodeRabbit
WalkthroughThe ClickHouse skill documents replace the PostgreSQL CDC example with a LISTEN/NOTIFY forwarding example. The example connects before listening, tracks pending writes, and logs processing and startup errors. The documents describe session scope, no retry or replay, and durable alternatives. ChangesPostgreSQL notification forwarding
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Merge Risk: 🔵 Low · up to The listener example may wait indefinitely during a stalled PostgreSQL connection instead of reporting startup failure. A finite connection timeout would address this bounded risk before merge. Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 3 systems. Changed systems: Architecture concerns Review detailsSystems and components
Before / after behavior
🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
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ECC Tools / Security EvidenceCommit: Security evidence gate passed (success) No security-sensitive scanner-evidence gap detected. Mode: enforce Scanned 6 changed file(s). No missing scanner-evidence signal was detected. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / PR Risk TaxonomyCommit: PR taxonomy review recommended (neutral) Detected 5 PR taxonomy bucket(s): Harness Drift, Install Manifest Integrity, Reference Set Validation, Skill Quality, Agent Config Review. Scanned 6 changed file(s). Roadmap taxonomy buckets: Harness DriftHarness-facing changes can drift across Claude Code, Codex, OpenCode, and shared adapter surfaces. Signals:
Paths:
Install Manifest IntegrityInstall manifests, plugin metadata, and shipped skills should stay synchronized with user-facing setup guidance. Signals:
Paths:
Reference Set ValidationAI, analyzer, skill, agent, command, and harness guidance changes should be compared against a maintained eval, golden trace, benchmark, or reference set. Signals:
Paths:
Skill QualitySkill, agent, command, and rule guidance should carry examples, triggers, validation, or reference evidence. Signals:
Paths:
Agent Config ReviewAgent, command, skill, MCP, and local instruction changes should be reviewed as executable agent configuration. Signals:
Paths:
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Reference Set ReadinessCommit: Reference set readiness gaps detected (neutral) Reference evidence present for 0/7 areas (0%) across 6 changed file(s). This check is based on files changed in this PR. Repository-level readiness is still reported by
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Hosted Promotion ReadinessCommit: Hosted promotion readiness passed (success) No hosted promotion evidence gaps detected across 6 changed file(s); 0 corpus scenarios had matching evidence. This check compares PR file changes against the evaluator/RAG promotion corpus in No evaluator corpus scenarios matched this PR. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Security EvidenceCommit: Security evidence gate passed (success) No security-sensitive scanner-evidence gap detected. Mode: enforce Scanned 6 changed file(s). No missing scanner-evidence signal was detected. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / PR Risk TaxonomyCommit: PR taxonomy review recommended (neutral) Detected 5 PR taxonomy bucket(s): Harness Drift, Install Manifest Integrity, Reference Set Validation, Skill Quality, Agent Config Review. Scanned 6 changed file(s). Roadmap taxonomy buckets: Harness DriftHarness-facing changes can drift across Claude Code, Codex, OpenCode, and shared adapter surfaces. Signals:
Paths:
Install Manifest IntegrityInstall manifests, plugin metadata, and shipped skills should stay synchronized with user-facing setup guidance. Signals:
Paths:
Reference Set ValidationAI, analyzer, skill, agent, command, and harness guidance changes should be compared against a maintained eval, golden trace, benchmark, or reference set. Signals:
Paths:
Skill QualitySkill, agent, command, and rule guidance should carry examples, triggers, validation, or reference evidence. Signals:
Paths:
Agent Config ReviewAgent, command, skill, MCP, and local instruction changes should be reviewed as executable agent configuration. Signals:
Paths:
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Reference Set ReadinessCommit: Reference set readiness gaps detected (neutral) Reference evidence present for 0/7 areas (0%) across 6 changed file(s). This check is based on files changed in this PR. Repository-level readiness is still reported by
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Hosted Promotion ReadinessCommit: Hosted promotion readiness passed (success) No hosted promotion evidence gaps detected across 6 changed file(s); 0 corpus scenarios had matching evidence. This check compares PR file changes against the evaluator/RAG promotion corpus in No evaluator corpus scenarios matched this PR. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Security EvidenceCommit: Security evidence gate passed (success) No security-sensitive scanner-evidence gap detected. Mode: enforce Scanned 6 changed file(s). No missing scanner-evidence signal was detected. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / PR Risk TaxonomyCommit: PR taxonomy review recommended (neutral) Detected 5 PR taxonomy bucket(s): Harness Drift, Install Manifest Integrity, Reference Set Validation, Skill Quality, Agent Config Review. Scanned 6 changed file(s). Roadmap taxonomy buckets: Harness DriftHarness-facing changes can drift across Claude Code, Codex, OpenCode, and shared adapter surfaces. Signals:
Paths:
Install Manifest IntegrityInstall manifests, plugin metadata, and shipped skills should stay synchronized with user-facing setup guidance. Signals:
Paths:
Reference Set ValidationAI, analyzer, skill, agent, command, and harness guidance changes should be compared against a maintained eval, golden trace, benchmark, or reference set. Signals:
Paths:
Skill QualitySkill, agent, command, and rule guidance should carry examples, triggers, validation, or reference evidence. Signals:
Paths:
Agent Config ReviewAgent, command, skill, MCP, and local instruction changes should be reviewed as executable agent configuration. Signals:
Paths:
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Reference Set ReadinessCommit: Reference set readiness gaps detected (neutral) Reference evidence present for 0/7 areas (0%) across 6 changed file(s). This check is based on files changed in this PR. Repository-level readiness is still reported by
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Hosted Promotion ReadinessCommit: Hosted promotion readiness passed (success) No hosted promotion evidence gaps detected across 6 changed file(s); 0 corpus scenarios had matching evidence. This check compares PR file changes against the evaluator/RAG promotion corpus in No evaluator corpus scenarios matched this PR. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
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Inline comments:
Review comments at @skills/clickhouse-io/SKILL.md:
- Line 438: Add a finite connectionTimeoutMillis setting to every new Client
call in all six examples so pgClient.connect() eventually rejects on timeout and
allows the startup catch handler to run. Update
skills/clickhouse-io/SKILL.md:438, docs/ja-JP/skills/clickhouse-io/SKILL.md:427,
docs/ko-KR/skills/clickhouse-io/SKILL.md:448,
docs/zh-CN/skills/clickhouse-io/SKILL.md:438,
docs/zh-TW/skills/clickhouse-io/SKILL.md:427, and
pi/core/skills/clickhouse-io/SKILL.md:438.
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docs/ja-JP/skills/clickhouse-io/SKILL.mddocs/ko-KR/skills/clickhouse-io/SKILL.mddocs/zh-CN/skills/clickhouse-io/SKILL.mddocs/zh-TW/skills/clickhouse-io/SKILL.mdpi/core/skills/clickhouse-io/SKILL.mdskills/clickhouse-io/SKILL.md
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Focus on prompt-injection resilience, tool-permission scope, destructive action guards, and secret exfiltration risks.
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Files:
skills/clickhouse-io/SKILL.md
Source excerpt: スキル：明確なセクション（使用タイミング、仕組み、例）
📄 CodeRabbit inference engine (docs/ja-JP/CLAUDE.md)
Files:
docs/ja-JP/skills/clickhouse-io/SKILL.md
Source excerpt: **console.log audit**: Check all modified files for `console.log` before session ends
📄 CodeRabbit inference engine (.cursor/rules/typescript-hooks.md)
Files:
pi/core/skills/clickhouse-io/SKILL.mddocs/ja-JP/skills/clickhouse-io/SKILL.mdskills/clickhouse-io/SKILL.mddocs/zh-TW/skills/clickhouse-io/SKILL.mddocs/zh-CN/skills/clickhouse-io/SKILL.mddocs/ko-KR/skills/clickhouse-io/SKILL.md
ECC Tools / Security EvidenceCommit: Security evidence gate passed (success) No security-sensitive scanner-evidence gap detected. Mode: enforce Scanned 6 changed file(s). No missing scanner-evidence signal was detected. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / PR Risk TaxonomyCommit: PR taxonomy review recommended (neutral) Detected 5 PR taxonomy bucket(s): Harness Drift, Install Manifest Integrity, Reference Set Validation, Skill Quality, Agent Config Review. Scanned 6 changed file(s). Roadmap taxonomy buckets: Harness DriftHarness-facing changes can drift across Claude Code, Codex, OpenCode, and shared adapter surfaces. Signals:
Paths:
Install Manifest IntegrityInstall manifests, plugin metadata, and shipped skills should stay synchronized with user-facing setup guidance. Signals:
Paths:
Reference Set ValidationAI, analyzer, skill, agent, command, and harness guidance changes should be compared against a maintained eval, golden trace, benchmark, or reference set. Signals:
Paths:
Skill QualitySkill, agent, command, and rule guidance should carry examples, triggers, validation, or reference evidence. Signals:
Paths:
Agent Config ReviewAgent, command, skill, MCP, and local instruction changes should be reviewed as executable agent configuration. Signals:
Paths:
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Reference Set ReadinessCommit: Reference set readiness gaps detected (neutral) Reference evidence present for 0/7 areas (0%) across 6 changed file(s). This check is based on files changed in this PR. Repository-level readiness is still reported by
Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
ECC Tools / Hosted Promotion ReadinessCommit: Hosted promotion readiness passed (success) No hosted promotion evidence gaps detected across 6 changed file(s); 0 corpus scenarios had matching evidence. This check compares PR file changes against the evaluator/RAG promotion corpus in No evaluator corpus scenarios matched this PR. Check publication was denied or unavailable. An app owner must enable Checks: read and write, and the installation owner must approve the updated permission. |
The PostgreSQL notification example constructs a
pg.Clientand queuesLISTENwithout ever connecting it, so the listener cannot become active. The CDC heading also implies replay that a session-scoped LISTEN/NOTIFY example does not provide.Register the notification handler before activation, await
connect(), then awaitLISTENinside an explicit startup function. Catch malformed notifications and rejected inserts in the callback, report connection errors, and close the client after startup failure. This also avoids a top-level-await requirement for CommonJS readers. Describe the example as application-emitted change notifications and explain the session lifetime and durable CDC boundary, including the absence of retry or replay after a failed notification. Synchronize four translations and generated Pi core.Validation: source and execution order checked against the official node-postgres connection guide and PostgreSQL LISTEN and NOTIFY contracts. The actual documented snippet was transpiled to CommonJS and executed with stubbed database operations: both prior malformed-JSON and insert failures produced unhandled rejections; all six updated cases passed (valid notification, malformed JSON, insert rejection, connection rejection, LISTEN rejection, and idle connection error). Pi generation/freshness passes (123 skills, 24 commands); all six diffs reviewed and
git diff --checkpasses. No live database connection, notification delivery, ClickHouse insertion, full-suite or client-session rerun was performed.Review follow-up (2026-10-02)
drain already received notification inserts before exit; ignore repeat connection errors; bounded 5000ms PostgreSQL startup; O(1) promise-chain tracking per notification
Validation: 18 compiled snippets incl six 10000-notification backlogs; configured timeout asserted; Pi freshness/diff; no live database run.