DevOps and Platform Engineering
Use this skill for platform, infrastructure, CI/CD, GitOps, observability, and incident-operating-model design. Keep the output operational: target architecture, rollout path, guardrails, ownership, and artifacts.
Quick Reference
| Need |
Starting Direction |
| infrastructure provisioning |
Terraform, OpenTofu, Pulumi, or cloud-native IaC |
| cluster or app deployment |
GitOps first for steady-state, direct tooling for local iteration |
| CI/CD |
protected pipelines plus workload identity and supply-chain controls — see supply-chain-security |
| observability |
OpenTelemetry plus metrics, logs, traces, and SLO-based alerting |
| platform engineering |
golden paths, policy-as-code, and self-service interfaces |
| incident operations |
runbooks, severity model, escalation, and postmortems |
Workflow
- classify the dominant problem:
- provisioning
- deployment
- CI/CD
- observability
- platform engineering
- security hardening
- incident operations
- choose the smallest viable toolchain that matches the runtime and team skill
- load the relevant reference and template set
- verify version-sensitive or vendor-sensitive claims before final guidance
- finish with concrete operational outputs: plan, controls, owners, and artifacts
Decision Rules
| Situation |
Rule |
| any infrastructure change |
IaC first; no clickops |
| steady-state production reconciliation |
GitOps (Argo CD / Flux) over push-based deploys |
| CI credentials |
workload identity (OIDC) over long-lived secrets |
| alerting |
SLO burn-rate alerts; suppress raw host-metric noise |
| new environments |
platform template + policy guard; no snowflakes |
| supply-chain integrity |
SLSA build track + cosign keyless signing |
| drift |
detect via reconciler or terraform plan in CI; never discover by accident |
Related Routing
Guardrails
| Domain |
Do |
Anti-pattern to avoid |
| Provisioning |
all material changes in IaC; explicit promotion gates |
clickops drift; untagged infrastructure |
| Delivery |
protected pipelines; artifact provenance; rollback + smoke checks |
pipelines without identity boundaries |
| Platform |
golden paths before self-service; policy-as-code that reduces variation |
tools shipped without adoption path or ownership |
| Observability |
define SLOs first; join logs/traces/metrics on shared trace ID |
alert fatigue from raw host-metric thresholds |
| Incidents |
postmortems feed runbooks and platform changes |
postmortems that stop at narrative |
| Cost |
tagging + budget alerts at resource creation; monthly right-sizing |
unmanaged snowflake environments; unreviewed reservations |
Navigation
Reference routing
| Load when… |
Reference |
| supply-chain, SBOM, signing, SLSA |
references/supply-chain-security.md |
| DORA's five metrics and team archetypes (Elite/High/Medium/Low tiers are retired), AI-adoption instability tax, general DevOps best practices |
references/devops-best-practices.md |
| GitLab CI — parent/child pipelines, MR variable traps, env-export pattern |
references/gitlab-ci-patterns.md |
| choosing a tool (IaC, GitOps, CI, policy, observability) |
references/tool-landscape.md |
| golden paths, internal developer portal, platform maturity, when NOT to build an IDP, platform-vs-product boundary, measuring team cognitive load (Weis four-cluster model, Teamperature, leadership load), CI/IaC/GitOps adoption sequencing |
references/platform-engineering-patterns.md |
| GitOps multi-env promotion, Argo CD / Flux patterns, automation lag and why continuous apply beats apply-on-change |
references/gitops-workflows.md |
Terraform state isolation, why terraform workspace is wrong for environments, stage/prod/mgmt/global layout, secrets-in-state and backend choice |
references/terraform-state-architecture.md |
| stack sizing (monolithic → application-group → service → micro), blast radius, "is my stack a monolith?" |
references/stack-sizing-patterns.md |
| IaC testing rungs and their blind spots, infrastructure test diamond vs pyramid, Swiss-cheese layering |
references/infrastructure-testing-strategy.md |
| on-call, severity model, escalation, postmortems |
references/sre-incident-management.md |
| day-2 operational runbooks, environment hygiene |
references/operational-patterns.md |
| AIOps alert correlation, automated triage |
references/aiops-patterns.md |
| Kalman canary, cost autoscaler, CI capacity stabiliser |
references/control-theory-applied.md |
| capacity planning, saturation SLO, pipeline bottleneck hunt |
references/queueing-theory-applied.md |
| CI/CD throughput recovery, constraint surfacing, spend reallocation |
references/theory-of-constraints-applied.md |
| platform-team charter, algedonic escalation, PRR audit |
references/cybernetics-vsm-applied.md |
| MTBF/MTTR, availability budgets, FMEA |
references/reliability-theory-applied.md |
| CAP/PACELC, consensus, idempotency, quorums |
references/distributed-systems-applied.md |
| source URLs and release trackers |
data/sources.json |
Templates
AWS / GCP / Azure
- assets/aws/template-aws-ops.md — AWS day-2 ops checklist
- assets/aws/template-aws-terraform.md — AWS Terraform module skeleton
- assets/aws/template-cost-optimization.md — AWS cost right-sizing and reservation review
- assets/gcp/template-gcp-ops.md — GCP day-2 ops checklist
- assets/gcp/template-gcp-terraform.md — GCP Terraform module skeleton
- assets/azure/template-azure-ops.md — Azure day-2 ops checklist
Kubernetes
- assets/kubernetes/template-kubernetes-ops.md — cluster day-2 ops
- assets/kubernetes/template-ha-dr.md — HA and disaster-recovery topology
- assets/kubernetes/template-platform-api.md — platform API contract for self-service
- assets/kubernetes/template-k8s-deploy.yaml — base Deployment manifest
Docker / Kafka
- assets/docker/template-docker-ops.md — image build and runtime hardening
- assets/kafka/template-kafka-ops.md — Kafka cluster operations
Terraform / IaC
- assets/terraform-iac/template-iac-terraform.md — root module structure
- assets/terraform-iac/template-module.md — reusable child module
- assets/terraform-iac/template-env-promotion.md — environment promotion workflow
CI/CD and GitOps
- assets/cicd-pipelines/template-ci-cd.md — generic CI/CD pipeline design
- assets/cicd-pipelines/template-github-actions.md — GitHub Actions workflow with OIDC
- assets/cicd-pipelines/template-gitops.md — GitOps promotion pipeline
- assets/cicd-pipelines/template-release-safety.md — release gates and rollback
Monitoring / Observability
- assets/monitoring-observability/template-slo.md — SLO definition sheet
- assets/monitoring-observability/template-alert-rules.md — burn-rate alert rules
- assets/monitoring-observability/template-observability-slo.md — full observability + SLO stack
- assets/monitoring-observability/template-loadtest-perf.md — load-test and performance baseline
Incident response
- assets/incident-response/template-postmortem.md — blameless postmortem
- assets/incident-response/template-runbook-starter.md — runbook starter
- assets/incident-response/template-incident-comm.md — stakeholder communications
- assets/incident-response/template-incident-response.md — full IR playbook
Security / Cost
- assets/security/template-security-hardening.md — hardening checklist
- assets/cost-governance/template-cost-governance.md — FinOps tagging and budget controls
Shared utilities
Related Skills
Trend Awareness Protocol
When users ask for current tool recommendations, verify:
- current supported Kubernetes and ecosystem versions
- active IaC and GitOps tool state
- current observability and policy-engine capabilities
- current CI/CD and platform-tool support windows
Prefer official docs and release notes over blogs or rankings.
Fact-Checking
- Verify current versions, deprecations, support windows, pricing, and cloud limits before final answers.
- Prefer official docs and release notes for named tools and platforms.
- If web access is unavailable, mark version-sensitive guidance as unverified.
Learnings Loop
Before applying this skill on a non-trivial task, read learnings.consolidated.md in this directory (and learnings.md if present).
After applying it, if you encountered a pattern worth remembering, a mistake worth preventing, or a domain fact that surprised you, append one dated bullet to learnings.md via agents-skills-feedback-loop/scripts/append_learning.py. Do not modify SKILL.md itself.
1---2name: ops-devops-platform3description: Designs DevOps and platform engineering systems. Use when planning Kubernetes, Terraform, GitOps, CI/CD, observability, incident response, or cloud-native operations.4---5
6# DevOps and Platform Engineering
7
8Use this skill for platform, infrastructure, CI/CD, GitOps, observability, and incident-operating-model design. Keep the output operational: target architecture, rollout path, guardrails, ownership, and artifacts.
9
10## Quick Reference
11
12| Need | Starting Direction |
13|------|--------------------|
14| infrastructure provisioning | Terraform, OpenTofu, Pulumi, or cloud-native IaC |
15| cluster or app deployment | GitOps first for steady-state, direct tooling for local iteration |
16| CI/CD | protected pipelines plus workload identity and supply-chain controls — see [supply-chain-security](references/supply-chain-security.md) |
17| observability | OpenTelemetry plus metrics, logs, traces, and SLO-based alerting |
18| platform engineering | golden paths, policy-as-code, and self-service interfaces |
19| incident operations | runbooks, severity model, escalation, and postmortems |
20
21## Workflow
22
231. classify the dominant problem:
24 - provisioning
25 - deployment
26 - CI/CD
27 - observability
28 - platform engineering
29 - security hardening
30 - incident operations
312. choose the smallest viable toolchain that matches the runtime and team skill
323. load the relevant reference and template set
334. verify version-sensitive or vendor-sensitive claims before final guidance
345. finish with concrete operational outputs: plan, controls, owners, and artifacts
35
36## Decision Rules
37
38| Situation | Rule |
39|-----------|------|
40| any infrastructure change | IaC first; no clickops |
41| steady-state production reconciliation | GitOps (Argo CD / Flux) over push-based deploys |
42| CI credentials | workload identity (OIDC) over long-lived secrets |
43| alerting | SLO burn-rate alerts; suppress raw host-metric noise |
44| new environments | platform template + policy guard; no snowflakes |
45| supply-chain integrity | SLSA build track + cosign keyless signing |
46| drift | detect via reconciler or `terraform plan` in CI; never discover by accident |
47
48## Related Routing
49
50- service-level retries, deadlines, and chaos engineering -> [qa-resilience](../qa-resilience/SKILL.md)
51- telemetry implementation details -> [qa-observability](../qa-observability/SKILL.md)
52- backend service design -> [software-backend](../software-backend/SKILL.md)
53- system architecture -> [software-architecture-design](../software-architecture-design/SKILL.md)
54- appsec-specific design -> [software-security-appsec](../software-security-appsec/SKILL.md)
55- Git branch and PR workflow policy -> [dev-git-workflow](../dev-git-workflow/SKILL.md)
56
57---
58
59## Guardrails
60
61| Domain | Do | Anti-pattern to avoid |
62|--------|----|-----------------------|
63| Provisioning | all material changes in IaC; explicit promotion gates | clickops drift; untagged infrastructure |
64| Delivery | protected pipelines; artifact provenance; rollback + smoke checks | pipelines without identity boundaries |
65| Platform | golden paths before self-service; policy-as-code that reduces variation | tools shipped without adoption path or ownership |
66| Observability | define SLOs first; join logs/traces/metrics on shared trace ID | alert fatigue from raw host-metric thresholds |
67| Incidents | postmortems feed runbooks and platform changes | postmortems that stop at narrative |
68| Cost | tagging + budget alerts at resource creation; monthly right-sizing | unmanaged snowflake environments; unreviewed reservations |
69
70---
71
72## Navigation
73
74### Reference routing
75
76| Load when… | Reference |
77|------------|-----------|
78| supply-chain, SBOM, signing, SLSA | [references/supply-chain-security.md](references/supply-chain-security.md) |
79| DORA's five metrics and team archetypes (Elite/High/Medium/Low tiers are retired), AI-adoption instability tax, general DevOps best practices | [references/devops-best-practices.md](references/devops-best-practices.md) |
80| GitLab CI — parent/child pipelines, MR variable traps, env-export pattern | [references/gitlab-ci-patterns.md](references/gitlab-ci-patterns.md) |
81| choosing a tool (IaC, GitOps, CI, policy, observability) | [references/tool-landscape.md](references/tool-landscape.md) |
82| golden paths, internal developer portal, platform maturity, when NOT to build an IDP, platform-vs-product boundary, measuring team cognitive load (Weis four-cluster model, Teamperature, leadership load), CI/IaC/GitOps adoption sequencing | [references/platform-engineering-patterns.md](references/platform-engineering-patterns.md) |
83| GitOps multi-env promotion, Argo CD / Flux patterns, automation lag and why continuous apply beats apply-on-change | [references/gitops-workflows.md](references/gitops-workflows.md) |
84| Terraform state isolation, why `terraform workspace` is wrong for environments, stage/prod/mgmt/global layout, secrets-in-state and backend choice | [references/terraform-state-architecture.md](references/terraform-state-architecture.md) |
85| stack sizing (monolithic → application-group → service → micro), blast radius, "is my stack a monolith?" | [references/stack-sizing-patterns.md](references/stack-sizing-patterns.md) |
86| IaC testing rungs and their blind spots, infrastructure test diamond vs pyramid, Swiss-cheese layering | [references/infrastructure-testing-strategy.md](references/infrastructure-testing-strategy.md) |
87| on-call, severity model, escalation, postmortems | [references/sre-incident-management.md](references/sre-incident-management.md) |
88| day-2 operational runbooks, environment hygiene | [references/operational-patterns.md](references/operational-patterns.md) |
89| AIOps alert correlation, automated triage | [references/aiops-patterns.md](references/aiops-patterns.md) |
90| Kalman canary, cost autoscaler, CI capacity stabiliser | [references/control-theory-applied.md](references/control-theory-applied.md) |
91| capacity planning, saturation SLO, pipeline bottleneck hunt | [references/queueing-theory-applied.md](references/queueing-theory-applied.md) |
92| CI/CD throughput recovery, constraint surfacing, spend reallocation | [references/theory-of-constraints-applied.md](references/theory-of-constraints-applied.md) |
93| platform-team charter, algedonic escalation, PRR audit | [references/cybernetics-vsm-applied.md](references/cybernetics-vsm-applied.md) |
94| MTBF/MTTR, availability budgets, FMEA | [references/reliability-theory-applied.md](references/reliability-theory-applied.md) |
95| CAP/PACELC, consensus, idempotency, quorums | [references/distributed-systems-applied.md](references/distributed-systems-applied.md) |
96| source URLs and release trackers | [data/sources.json](data/sources.json) |
97
98### Templates
99
100**AWS / GCP / Azure**
101- [assets/aws/template-aws-ops.md](assets/aws/template-aws-ops.md) — AWS day-2 ops checklist
102- [assets/aws/template-aws-terraform.md](assets/aws/template-aws-terraform.md) — AWS Terraform module skeleton
103- [assets/aws/template-cost-optimization.md](assets/aws/template-cost-optimization.md) — AWS cost right-sizing and reservation review
104- [assets/gcp/template-gcp-ops.md](assets/gcp/template-gcp-ops.md) — GCP day-2 ops checklist
105- [assets/gcp/template-gcp-terraform.md](assets/gcp/template-gcp-terraform.md) — GCP Terraform module skeleton
106- [assets/azure/template-azure-ops.md](assets/azure/template-azure-ops.md) — Azure day-2 ops checklist
107
108**Kubernetes**
109- [assets/kubernetes/template-kubernetes-ops.md](assets/kubernetes/template-kubernetes-ops.md) — cluster day-2 ops
110- [assets/kubernetes/template-ha-dr.md](assets/kubernetes/template-ha-dr.md) — HA and disaster-recovery topology
111- [assets/kubernetes/template-platform-api.md](assets/kubernetes/template-platform-api.md) — platform API contract for self-service
112- [assets/kubernetes/template-k8s-deploy.yaml](assets/kubernetes/template-k8s-deploy.yaml) — base Deployment manifest
113
114**Docker / Kafka**
115- [assets/docker/template-docker-ops.md](assets/docker/template-docker-ops.md) — image build and runtime hardening
116- [assets/kafka/template-kafka-ops.md](assets/kafka/template-kafka-ops.md) — Kafka cluster operations
117
118**Terraform / IaC**
119- [assets/terraform-iac/template-iac-terraform.md](assets/terraform-iac/template-iac-terraform.md) — root module structure
120- [assets/terraform-iac/template-module.md](assets/terraform-iac/template-module.md) — reusable child module
121- [assets/terraform-iac/template-env-promotion.md](assets/terraform-iac/template-env-promotion.md) — environment promotion workflow
122
123**CI/CD and GitOps**
124- [assets/cicd-pipelines/template-ci-cd.md](assets/cicd-pipelines/template-ci-cd.md) — generic CI/CD pipeline design
125- [assets/cicd-pipelines/template-github-actions.md](assets/cicd-pipelines/template-github-actions.md) — GitHub Actions workflow with OIDC
126- [assets/cicd-pipelines/template-gitops.md](assets/cicd-pipelines/template-gitops.md) — GitOps promotion pipeline
127- [assets/cicd-pipelines/template-release-safety.md](assets/cicd-pipelines/template-release-safety.md) — release gates and rollback
128
129**Monitoring / Observability**
130- [assets/monitoring-observability/template-slo.md](assets/monitoring-observability/template-slo.md) — SLO definition sheet
131- [assets/monitoring-observability/template-alert-rules.md](assets/monitoring-observability/template-alert-rules.md) — burn-rate alert rules
132- [assets/monitoring-observability/template-observability-slo.md](assets/monitoring-observability/template-observability-slo.md) — full observability + SLO stack
133- [assets/monitoring-observability/template-loadtest-perf.md](assets/monitoring-observability/template-loadtest-perf.md) — load-test and performance baseline
134
135**Incident response**
136- [assets/incident-response/template-postmortem.md](assets/incident-response/template-postmortem.md) — blameless postmortem
137- [assets/incident-response/template-runbook-starter.md](assets/incident-response/template-runbook-starter.md) — runbook starter
138- [assets/incident-response/template-incident-comm.md](assets/incident-response/template-incident-comm.md) — stakeholder communications
139- [assets/incident-response/template-incident-response.md](assets/incident-response/template-incident-response.md) — full IR playbook
140
141**Security / Cost**
142- [assets/security/template-security-hardening.md](assets/security/template-security-hardening.md) — hardening checklist
143- [assets/cost-governance/template-cost-governance.md](assets/cost-governance/template-cost-governance.md) — FinOps tagging and budget controls
144
145### Shared utilities
146
147- [../software-clean-code-standard/references/config-validation.md](../software-clean-code-standard/references/config-validation.md)
148- [../software-clean-code-standard/references/resilience-utilities.md](../software-clean-code-standard/references/resilience-utilities.md)
149- [../software-clean-code-standard/references/logging-utilities.md](../software-clean-code-standard/references/logging-utilities.md)
150- [../software-clean-code-standard/references/observability-utilities.md](../software-clean-code-standard/references/observability-utilities.md)
151
152## Related Skills
153
154- [../qa-resilience/SKILL.md](../qa-resilience/SKILL.md)
155- [../data-sql-optimization/SKILL.md](../data-sql-optimization/SKILL.md)
156- [../qa-observability/SKILL.md](../qa-observability/SKILL.md)
157- [../qa-debugging/SKILL.md](../qa-debugging/SKILL.md)
158- [../software-security-appsec/SKILL.md](../software-security-appsec/SKILL.md)
159- [../software-backend/SKILL.md](../software-backend/SKILL.md)
160- [../software-architecture-design/SKILL.md](../software-architecture-design/SKILL.md)
161- [../dev-api-design/SKILL.md](../dev-api-design/SKILL.md)
162- [../dev-git-workflow/SKILL.md](../dev-git-workflow/SKILL.md)
163- [../ai-mlops/SKILL.md](../ai-mlops/SKILL.md)
164
165## Trend Awareness Protocol
166
167When users ask for current tool recommendations, verify:
168
169- current supported Kubernetes and ecosystem versions
170- active IaC and GitOps tool state
171- current observability and policy-engine capabilities
172- current CI/CD and platform-tool support windows
173
174Prefer official docs and release notes over blogs or rankings.
175
176## Fact-Checking
177
178- Verify current versions, deprecations, support windows, pricing, and cloud limits before final answers.
179- Prefer official docs and release notes for named tools and platforms.
180- If web access is unavailable, mark version-sensitive guidance as unverified.
181
182## Learnings Loop
183
184Before applying this skill on a non-trivial task, read `learnings.consolidated.md` in this directory (and `learnings.md` if present).
185
186After applying it, if you encountered a pattern worth remembering, a mistake worth preventing, or a domain fact that surprised you, append one dated bullet to `learnings.md` via `agents-skills-feedback-loop/scripts/append_learning.py`. Do not modify `SKILL.md` itself.
187
gabrielmoreira