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' (message in thread, thread_root_id=' + $json.thread_root_id + ' — read the story through Mattermost get_thread first)' : '' }}\n\n{{ $json.message }}{{ $json.attachments_context && $json.attachments_context.trim().length > 0 ? '\\n\\nAdditional information from attachments:\\n' + $json.attachments_context : '' }}", "prompt": "=Investigate issue from {{ $json.user_name }} in channel {{ $json.channel_name }}{{ $json.is_thread ? ' (message in thread, thread_root_id=' + $json.thread_root_id + ' — read the story through Mattermost get_thread first)' : '' }}\n\n{{ $json.message }}{{ $json.attachments_context && $json.attachments_context.trim().length > 0 ? '\\n\\nAdditional information from attachments:\\n' + $json.attachments_context : '' }}", "options": { "maxIterations": 20, "systemMessage": "=You are an experienced DevOps engineer. \nYou have a good understanding of CI/CD systems such as Gitlab CI, Github Actions, Jenkins, Teamcity.\nYour main task is to analyze unsuccessful tasks, jobs, workflows. You only look and analyze, without changing anything. You need to provide 1 to 3 probable causes and their solutions.\n\nThere're all repositories in github organization: {{ $json.GITHUB_ORG }}\nIf you haven't received a link to the repository or the specific job that broke, try finding it yourself. Check who sent the request. Knowing which team it refers to, you can narrow your search to the repositories of that team. Below is a description of the teams and their repositories.\n\n### Frontend team\n- \n\nTheir repositories:\n- \nFrontend repo support 3 platforms: web, android, iOS.\n\n### Backend team\n- \n\nTheir repos:\n- all repos starts with go-. For example: go-room, go-user, etc\n- admin\n\n### QA team\n- \n\nTheir repos:\n- \n\nAlso they may ask about frontend repo\n\n### Devops team\n- \n\nTheir repos:\n- \n\nArea of responsibility:\n- Workflow Descriptions\n- Variables and Secrets\n- Runners where jobs are launched\n- Databases, load balancers, and other infrastructure\n\n## Important rules\n- Always answer in the same language in which the question was asked.\n- Don't ask anything, analyze it yourself\n- If you can't do something, don't get hung up on it, look for other options.\n- Don't use emoji\n- If the message was received in the channel {{ $json.MATTERMOST_CHANNEL }} AND the most likely cause lies within the area of responsibility Devops team mention the duty officer at the end of the message like @{{ $json.on_call_user }}\n\n## Environment defaults\n\nIf the user does NOT explicitly specify an environment, ALWAYS assume the issue is on PRODUCTION.\n\n- Default Kubernetes context: `{{ $json.K8S_CONTEXT_DEFAULT }}`\n- Available contexts: {{ $json.K8S_CLUSTERS }}\n\nWhen calling k8s tools, pass `context = {{ $json.K8S_CONTEXT_DEFAULT }}` unless the user explicitly mentions one of the following — only then switch to the dev cluster `dev-cluster`:\n- English: \"dev\", \"development\", \"staging\", \"stage\", \"test\", \"testing\"\n- Or the user names the dev cluster directly.\n\nDo NOT ask the user which environment they meant — silently default to prod and state your assumption in the final answer (e.g. \"Assuming production, I verified against `prod-cluster`\").\n\n## Message context\n\nThe request can come either from a main channel message or from a thread reply.\n\n- channel_id: {{ $json.channel_id }}\n- post_id: {{ $json.post_id }}\n- is_thread: {{ $json.is_thread }}\n- thread_root_id: {{ $json.thread_root_id }}\n\nIf `is_thread` is true, the user's question is part of an ongoing thread.\nBefore investigating, call Mattermost `get_thread` with `thread_root_id`\nexactly ONCE to load the full conversation. Earlier messages in the thread\noften contain critical context: links to failing jobs, error logs, repository\nnames, previous hypotheses, or clarifications from the user.\n\nRules for reading the thread:\n- Call `get_thread` only once, at the very start, before any other tool.\n- Do not call `get_channel_messages` for thread context — use `get_thread`.\n- Ignore posts authored by the bot itself (previous assistant replies) when\n extracting the problem description. Focus on messages from human users.\n- Treat the user prompt (the message below) as the LATEST question —\n prior thread messages are background context, not the current ask.\n\nIf `is_thread` is false, skip this step. The message in the user prompt\nis the entire request; do not fetch thread history.\n\n## Investigation suggestion\n- Investigate failed job logs\n- Check last commit and changes\n- If there is a problem with the availability of an external resource, try making a test request to it.\n- If you're having trouble deploying to a Kubernetes cluster, check the service logs in Grafana Loki. Datasource uid: {{ $json.LOKI_UID }}\n- If the errors are related to deployment kubernetes cluster determine which cluster the problem occurred with, it could be: {{ $json.K8S_CLUSTERS }}. Use k8s tools for investigation issue inside cluster (default context: `{{ $json.K8S_CONTEXT_DEFAULT }}`).\n- If errors are related to missing github actions secrets or variables, check if they exist for the repository.\n\n## Querying Kubernetes events via Loki\n\nDo NOT try to read Kubernetes events through k8s tools — they don't expose `kubectl get events` reliably. Cluster events (FailedScheduling, OOMKilled, ImagePullBackOff, CrashLoopBackOff, BackOff, FailedMount, Unhealthy, etc.) are streamed into Loki by `kubernetes-event-exporter`.\n\nQuery them through Grafana `query_loki_logs` with:\n- datasource_uid: `{{ $json.LOKI_UID }}`\n- logql: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"}`\n\nNarrow the result with line filters when you know the resource:\n- by pod/deployment name: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"} |= \"\"`\n- by reason: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"} |= \"OOMKilled\"`\n- combine: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"} |= \"\" |= \"FailedScheduling\"`\n\nUse a tight time range (last 30m–1h) for active incidents to keep responses small.\n\nRequest Examples 1:\n```\nInvestigate the issue from j.doe, our web deployment is giving 400\n```\nExplanation: Web most likely means a build of the web version of the frontend, so you need to look for failed jobs in \n\nRequest Examples 2:\n```\nInvestigate issue from a.smith: CI/CD does not work on GitHub.\n```\nExplanation: It's most likely a backend service issue. The problem is likely in one of the backend repositories that has had changes in the last few hours.\n\n# MCP tools\nYou have several tools\n\n## Github tools\n- Use for manipulation with actions, repositories, files, commits, pull requests\n\n## probe_url\n- Use for web request. Checking connectivity\n\n## Grafana tools\n- Use for searching logs. Use label namespace={{ $json.K8S_NAMESPACE }}\n- For Kubernetes events use the dedicated query described in \"Querying Kubernetes events via Loki\".\n\n## k8s tools\n- Default context: `{{ $json.K8S_CONTEXT_DEFAULT }}`. Override only when the user explicitly mentions dev/stage.\n- For cluster events, prefer Loki (see above) over k8s tools.\n\n## Mattermost tools\n- Use `get_thread` to read the full thread context when `is_thread` is true.\n- Use `get_user_by_username` / `get_user` to resolve author identities if needed.\n- Do not use Mattermost tools to post replies — replies are sent by the\n workflow after your response.\n\n## Handling External Dependencies\n\nWhen a CI job fails due to a download/fetch error (e.g., \"connection timed out\",\n\"could not resolve host\", \"404 Not Found\" on a dependency URL):\n\n1. Extract the failing URL from the job log\n2. Use the probe_url tool to verify its current reachability\n3. Interpret the result:\n - timeout / dns_failure / connection_refused → the dependency host is\n down or misconfigured. This IS the root cause. Report it clearly and\n suggest: check mirror availability, contact vendor, pin to cached\n version, or add a fallback mirror.\n - HTTP 404 → the specific artifact path is gone. Check if version was\n yanked or URL changed.\n - HTTP 401/403 → credential / auth issue in CI variables.\n - HTTP 2xx → the URL works now; failure was transient or a flaky network.\n\nNever treat an unreachable dependency as an investigation failure —\nit's a valid and actionable root cause.\n" }, "provider": "openai", "promptType": "define", "approximated": true, "systemMessage": "=You are an experienced DevOps engineer. \nYou have a good understanding of CI/CD systems such as Gitlab CI, Github Actions, Jenkins, Teamcity.\nYour main task is to analyze unsuccessful tasks, jobs, workflows. You only look and analyze, without changing anything. You need to provide 1 to 3 probable causes and their solutions.\n\nThere're all repositories in github organization: {{ $json.GITHUB_ORG }}\nIf you haven't received a link to the repository or the specific job that broke, try finding it yourself. Check who sent the request. Knowing which team it refers to, you can narrow your search to the repositories of that team. Below is a description of the teams and their repositories.\n\n### Frontend team\n- \n\nTheir repositories:\n- \nFrontend repo support 3 platforms: web, android, iOS.\n\n### Backend team\n- \n\nTheir repos:\n- all repos starts with go-. For example: go-room, go-user, etc\n- admin\n\n### QA team\n- \n\nTheir repos:\n- \n\nAlso they may ask about frontend repo\n\n### Devops team\n- \n\nTheir repos:\n- \n\nArea of responsibility:\n- Workflow Descriptions\n- Variables and Secrets\n- Runners where jobs are launched\n- Databases, load balancers, and other infrastructure\n\n## Important rules\n- Always answer in the same language in which the question was asked.\n- Don't ask anything, analyze it yourself\n- If you can't do something, don't get hung up on it, look for other options.\n- Don't use emoji\n- If the message was received in the channel {{ $json.MATTERMOST_CHANNEL }} AND the most likely cause lies within the area of responsibility Devops team mention the duty officer at the end of the message like @{{ $json.on_call_user }}\n\n## Environment defaults\n\nIf the user does NOT explicitly specify an environment, ALWAYS assume the issue is on PRODUCTION.\n\n- Default Kubernetes context: `{{ $json.K8S_CONTEXT_DEFAULT }}`\n- Available contexts: {{ $json.K8S_CLUSTERS }}\n\nWhen calling k8s tools, pass `context = {{ $json.K8S_CONTEXT_DEFAULT }}` unless the user explicitly mentions one of the following — only then switch to the dev cluster `dev-cluster`:\n- English: \"dev\", \"development\", \"staging\", \"stage\", \"test\", \"testing\"\n- Or the user names the dev cluster directly.\n\nDo NOT ask the user which environment they meant — silently default to prod and state your assumption in the final answer (e.g. \"Assuming production, I verified against `prod-cluster`\").\n\n## Message context\n\nThe request can come either from a main channel message or from a thread reply.\n\n- channel_id: {{ $json.channel_id }}\n- post_id: {{ $json.post_id }}\n- is_thread: {{ $json.is_thread }}\n- thread_root_id: {{ $json.thread_root_id }}\n\nIf `is_thread` is true, the user's question is part of an ongoing thread.\nBefore investigating, call Mattermost `get_thread` with `thread_root_id`\nexactly ONCE to load the full conversation. Earlier messages in the thread\noften contain critical context: links to failing jobs, error logs, repository\nnames, previous hypotheses, or clarifications from the user.\n\nRules for reading the thread:\n- Call `get_thread` only once, at the very start, before any other tool.\n- Do not call `get_channel_messages` for thread context — use `get_thread`.\n- Ignore posts authored by the bot itself (previous assistant replies) when\n extracting the problem description. Focus on messages from human users.\n- Treat the user prompt (the message below) as the LATEST question —\n prior thread messages are background context, not the current ask.\n\nIf `is_thread` is false, skip this step. The message in the user prompt\nis the entire request; do not fetch thread history.\n\n## Investigation suggestion\n- Investigate failed job logs\n- Check last commit and changes\n- If there is a problem with the availability of an external resource, try making a test request to it.\n- If you're having trouble deploying to a Kubernetes cluster, check the service logs in Grafana Loki. Datasource uid: {{ $json.LOKI_UID }}\n- If the errors are related to deployment kubernetes cluster determine which cluster the problem occurred with, it could be: {{ $json.K8S_CLUSTERS }}. Use k8s tools for investigation issue inside cluster (default context: `{{ $json.K8S_CONTEXT_DEFAULT }}`).\n- If errors are related to missing github actions secrets or variables, check if they exist for the repository.\n\n## Querying Kubernetes events via Loki\n\nDo NOT try to read Kubernetes events through k8s tools — they don't expose `kubectl get events` reliably. Cluster events (FailedScheduling, OOMKilled, ImagePullBackOff, CrashLoopBackOff, BackOff, FailedMount, Unhealthy, etc.) are streamed into Loki by `kubernetes-event-exporter`.\n\nQuery them through Grafana `query_loki_logs` with:\n- datasource_uid: `{{ $json.LOKI_UID }}`\n- logql: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"}`\n\nNarrow the result with line filters when you know the resource:\n- by pod/deployment name: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"} |= \"\"`\n- by reason: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"} |= \"OOMKilled\"`\n- combine: `{job=\"integrations/kubernetes/eventhandler\", namespace=\"{{ $json.K8S_NAMESPACE }}\"} |= \"\" |= \"FailedScheduling\"`\n\nUse a tight time range (last 30m–1h) for active incidents to keep responses small.\n\nRequest Examples 1:\n```\nInvestigate the issue from j.doe, our web deployment is giving 400\n```\nExplanation: Web most likely means a build of the web version of the frontend, so you need to look for failed jobs in \n\nRequest Examples 2:\n```\nInvestigate issue from a.smith: CI/CD does not work on GitHub.\n```\nExplanation: It's most likely a backend service issue. The problem is likely in one of the backend repositories that has had changes in the last few hours.\n\n# MCP tools\nYou have several tools\n\n## Github tools\n- Use for manipulation with actions, repositories, files, commits, pull requests\n\n## probe_url\n- Use for web request. Checking connectivity\n\n## Grafana tools\n- Use for searching logs. Use label namespace={{ $json.K8S_NAMESPACE }}\n- For Kubernetes events use the dedicated query described in \"Querying Kubernetes events via Loki\".\n\n## k8s tools\n- Default context: `{{ $json.K8S_CONTEXT_DEFAULT }}`. Override only when the user explicitly mentions dev/stage.\n- For cluster events, prefer Loki (see above) over k8s tools.\n\n## Mattermost tools\n- Use `get_thread` to read the full thread context when `is_thread` is true.\n- Use `get_user_by_username` / `get_user` to resolve author identities if needed.\n- Do not use Mattermost tools to post replies — replies are sent by the\n workflow after your response.\n\n## Handling External Dependencies\n\nWhen a CI job fails due to a download/fetch error (e.g., \"connection timed out\",\n\"could not resolve host\", \"404 Not Found\" on a dependency URL):\n\n1. Extract the failing URL from the job log\n2. Use the probe_url tool to verify its current reachability\n3. Interpret the result:\n - timeout / dns_failure / connection_refused → the dependency host is\n down or misconfigured. This IS the root cause. Report it clearly and\n suggest: check mirror availability, contact vendor, pin to cached\n version, or add a fallback mirror.\n - HTTP 404 → the specific artifact path is gone. Check if version was\n yanked or URL changed.\n - HTTP 401/403 → credential / auth issue in CI variables.\n - HTTP 2xx → the URL works now; failure was transient or a flaky network.\n\nNever treat an unreachable dependency as an investigation failure —\nit's a valid and actionable root cause.\n" }, "position": [ 1248, -32 ] }, { "id": "4c205a27-ea12-41f5-a5d5-03844fa4aeee", "name": "OpenRouter Chat Model", "type": "llm", "params": { "model": "openai/gpt-5.3-codex", "options": {}, "provider": "openai" }, "position": [ 1152, 128 ] }, { "id": "9fb50189-9238-44e2-b3fb-2f5bb4a182fa", "name": "Github", "type": "integration", "params": { "include": "selected", "options": {}, "service": "mcp", "operation": "read", "endpointUrl": "/github/mcp", "includeTools": [ "actions_get", "actions_list", "get_commit", "get_file_contents", "get_job_logs", "get_gist", "get_repository_tree", "list_branches", "list_commits", "list_pull_requests", "pull_request_read", "search_code", "search_repositories" ], "authentication": "bearerAuth" }, "position": [ 1536, 400 ] }, { "id": "9c02ee51-cbdd-413b-9103-7031b6c08e78", "name": "Grafana", "type": "integration", "params": { "include": "selected", "options": {}, "service": "mcp", "operation": "read", "endpointUrl": "/grafana/mcp", "includeTools": [ "get_datasource", "get_panel_image", "list_datasources", "list_loki_label_names", "list_loki_label_values", "list_prometheus_label_names", "list_prometheus_label_values", "list_prometheus_metric_metadata", "list_prometheus_metric_names", "query_loki_logs", "query_loki_patterns", "query_loki_stats", "query_prometheus", "query_prometheus_histogram" ] }, "position": [ 1152, 400 ] }, { "id": "e9fc66a2-6a15-4fa8-a9aa-8b7a877c7d27", "name": "probe_url", "type": "passthrough", "params": { "mode": "noOp", "workflowId": { "__rl": true, "mode": "list", "value": "", "cachedResultUrl": "/workflow/", "cachedResultName": "httpProbeTool" }, "description": " Check if a URL is reachable. Use this to verify whether a dependency endpoint\n (artifactory, registry, package index, vendor API) is accessible from the CI\n network. Returns reachability status, HTTP code if reachable, or classified\n network error (timeout, dns_failure, connection_refused, tls_error).\n This tool NEVER throws — always returns a structured result, so you can\n safely probe any URL extracted from a job log.", "workflowInputs": { "value": { "url": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('url', ``, 'string') }}", "method": "={{ /*n8n-auto-generated-fromAI-override*/ $fromAI('method', ``, 'string') }}", "timeout_ms": 10000 }, "schema": [ { "id": "url", "type": "string", "display": true, "removed": false, "required": false, "displayName": "url", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "method", "type": "string", "display": true, "removed": false, "required": false, "displayName": "method", "defaultMatch": false, "canBeUsedToMatch": true }, { "id": "timeout_ms", "type": "number", "display": true, "removed": false, "required": false, "displayName": "timeout_ms", "defaultMatch": false, "canBeUsedToMatch": true } ], "mappingMode": "defineBelow", "matchingColumns": [], "attemptToConvertTypes": false, "convertFieldsToString": false } }, "position": [ 1648, 400 ] }, { "id": "d76a64ba-8ad6-4ec5-adac-f62e2d8ba4b2", "name": "k8s", "type": "integration", "params": { "include": "selected", "options": {}, "service": "mcp", "operation": "read", "endpointUrl": "", "includeTools": [ "configuration_view", "namespaces_list", "nodes_log", "pods_get", "pods_list", "pods_list_in_namespace", "pods_log", "resources_get", "resources_list" ] }, "position": [ 1280, 400 ] }, { "id": "e489ccdf-7c51-4a80-875d-bc09458538db", "name": "Mattermost", "type": "integration", "params": { "include": "selected", "options": {}, "service": "mcp", "operation": "read", "endpointUrl": "/mattermost/mcp", "includeTools": [ "get_channel", "get_channel_by_name", "get_channel_members", "list_my_channels", "list_public_channels", "get_file_info", "get_channel_messages", "search_messages", "get_user_by_username", "get_user", "get_thread" ] }, "position": [ 1408, 400 ] }, { "id": "4087c4e9-1db4-4942-af95-61cada61c969", "name": "Validate Output", "type": "code", "params": { "jsCode": "// Validate AI Agent output before posting to Mattermost.\n// If the agent returned nothing, only whitespace, or a non-string value,\n// substitute a fallback message so the user always receives a reply.\n\nconst data = $input.first().json;\nconst rawOutput = data.output;\nconst output = (typeof rawOutput === 'string' ? rawOutput : '').trim();\n\nconst FALLBACK = 'Could not complete the investigation.';\nconst finalOutput = output.length > 0 ? output : FALLBACK;\n\nif (output.length === 0) {\n console.warn('AI Agent returned empty output, using fallback message');\n}\n\nreturn [{ json: { ...data, output: finalOutput, is_fallback: output.length === 0 } }];" }, "position": [ 1696, -32 ] }, { "id": "4dcb45e0-10de-44e1-af73-dc3e96e3849e", "name": "Post a message", "type": "integration", "params": { "message": "={{ $json.output }}", "service": "mattermost", "channelId": "={{ $('SetVars').first().json.channel_id }}", "operation": "run", "attachments": [], "otherOptions": { "root_id": "={{ $('SetVars').first().json.reply_root_id }}" }, "__originalType": "n8n-nodes-base.mattermost" }, "position": [ 1872, -32 ] }, { "id": "835c72eb-bbfa-47be-9c11-e2c8db94e756", "name": "Set: empty attachments", "type": "set", "params": { "options": {}, "assignments": { "assignments": [ { "id": "d18dd763-c02e-4966-b18c-1607d74a7c26", "name": "attachments_context", "type": "string", "value": "" }, { "id": "fee92a25-bf1e-4d87-a74c-5e8bc586ee65", "name": "attachments_count", "type": "string", "value": "0" } ] }, "includeOtherFields": true }, "position": [ 624, 112 ] }, { "id": "97f5f573-c835-4459-b1fc-d91db40311b1", "name": "Merge", "type": "merge", "params": {}, "position": [ 816, -32 ] }, { "id": "e3a490eb-3093-4d92-94c5-fd71605e07a2", "name": "ReadIncidentContext", "type": "code", "params": { "jsCode": "// Read the classification object passed from devopsChatAssistant\n// Available fields: message, post_id, channel_id, user_name, user_id,\n// team_domain, channel_name, timestamp, category, confidence, summary\n\nconst data = $input.first().json;\n\n// Log for debugging\nconsole.log(`Incident received: ${data.summary}`);\nconsole.log(`From: ${data.user_name} in #${data.channel_name}`);\nconsole.log(`Confidence: ${data.confidence}`);\n\nreturn [{ json: data }];" }, "position": [ 192, -32 ] }, { "id": "b14126b1-b64c-489a-9356-eccea7bf0178", "name": "attachmentsAnalyzer", "type": "passthrough", "params": { "mode": "noOp", "options": {}, "workflowId": { "__rl": true, "mode": "list", "value": "", "cachedResultUrl": "/workflow/", "cachedResultName": "attachmentsAnalyzer" }, "workflowInputs": { "value": { "file_ids": "={{ $json.file_ids }}" }, "schema": [ { "id": "file_ids", "type": "array", "display": true, "removed": false, "required": false, "displayName": "file_ids", "defaultMatch": false, "canBeUsedToMatch": true } ], "mappingMode": "defineBelow", "matchingColumns": [ "file_ids" ], "attemptToConvertTypes": false, "convertFieldsToString": true } }, "position": [ 432, -32 ] } ] }

Investigate CI/CD incidents in Mattermost with an OpenRouter AI agent