feat: chaos-engineering-test-generator skill and sre-incident-responder-agent agent

[Gugaarleo]

Pull Request Checklist

• I have read and followed the CONTRIBUTING.md guidelines.
• I have read and followed the Guidance for submissions involving paid services.
• My contribution adds a new instruction, prompt, agent, skill, workflow, or canvas extension file in the correct directory.
• The file follows the required naming convention.
• The content is clearly structured and follows the example format.
• I have tested my instructions, prompt, agent, skill, workflow, or canvas extension with GitHub Copilot.
• I have run npm start and verified that README.md is up to date.
• I am targeting the main branch for this pull request.

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Description

Adds a Skill + Agent bundle focused on resilience engineering and incident response.

Skill: chaos-engineering-test-generator (skills/chaos-engineering-test-generator/)
Generates ready-to-run chaos engineering experiments (LitmusChaos, Chaos Mesh, Chaos Monkey-style, AWS FIS) to validate system resilience against network latency, pod/instance failure, CPU/memory stress, and dependency outages. Every generated experiment is hypothesis-driven and always includes a defined blast radius, a duration cap, and an abort condition tied to a monitored metric — never a fault injected without a rollback path. Includes three worked examples (pod-delete, network latency injection, CPU stress) and a progressive blast-radius escalation pattern for taking an experiment from a single pod in non-prod to a full production Game Day.

Agent: sre-incident-responder (agents/sre-incident-responder.agent.md)
Acts as a Site Reliability Engineer during both live production incidents and planned resilience exercises. Follows a consistent triage → mitigate → diagnose → communicate → learn flow, always checking for a fast mitigation (rollback, feature flag, failover, scale-out) before deep root-causing. Drafts factual, non-speculative status updates and blameless post-mortems (timeline, contributing factors, action items — no individual blame). When the session is a planned Game Day rather than a live incident, it hands off to the chaos-engineering-test-generator skill to scaffold the experiment (hypothesis, blast radius, abort condition) before running the same response flow against the simulated failure.

Together, the skill and agent form a bundle: the skill designs the fault-injection experiment, and the agent conducts the response to it — covering both the Cloud Monitoring/SRE and Security/Resilience areas of the course.

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Type of Contribution

• New instruction file.
• New prompt file.
• New agent file.
• New plugin.
• New skill file.
• New agentic workflow.
• New canvas extension.
• Update to existing instruction, prompt, agent, plugin, skill, workflow, or canvas extension.
• Other (please specify):

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Additional Notes

• Skill triggers automatically when a prompt mentions resilience testing, chaos experiments, Game Days, or Kubernetes/cloud fault injection.
• Agent can be invoked directly via @sre-incident-responder in Copilot Chat.
• Both were validated against npm run skill:validate and npm run build.

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By submitting this pull request, I confirm that my contribution abides by the Code of Conduct and will be licensed under the MIT License.

[github-actions]

🔒 PR Risk Scan Results

Scanned 4 changed file(s).

Severity	Count
🔴 High	0
🟠 Medium	2
ℹ️ Info	0

Severity	Rule	File	Line	Match
🟠	package-exec-command	docs/README.skills.md	31	| [acreadiness-assess](../skills/acreadiness-assess/SKILL.md)<br />`gh skills install github/awesome-copilot acreadiness-assess` | Run the AgentRC readiness assessment on the curre
🟠	unpinned-version-indicator	skills/chaos-engineering-test-generator/SKILL.md	122	Abort condition: stop immediately if `search_service_p99_latency_ms > 800` for more than 30s (wire to an alert or a manual `kubectl delete stresschaos search-service-cpu-hog`).

This is an automated soft-gate report. Findings indicate review targets and do not block merge by themselves.

[github-actions]

🔍 Vally Lint Results

⚠️ Warnings or advisories found

Scope	Checked
Skills	1
Agents	1
Total	2

Severity	Count
❌ Errors	0
⚠️ Warnings	0
ℹ️ Advisories	1

Summary

Level	Finding
ℹ️	Vally currently lints SKILL.md content. Agent files were detected but skipped:

Full linter output

### Linting skills/chaos-engineering-test-generator
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: 'commander@15.0.0',
npm warn EBADENGINE   required: { node: '>=22.12.0' },
npm warn EBADENGINE   current: { node: 'v20.20.2', npm: '10.8.2' }
npm warn EBADENGINE }
npm warn deprecated prebuild-install@7.1.3: No longer maintained. Please contact the author of the relevant native addon; alternatives are available.
✅ chaos-engineering-test-generator (2/2 checks passed)
    ✓ [spec-compliance] All 1 skill(s) are spec-compliant.
        ✓ spec-compliance: All spec checks passed.
    ✓ [valid-refs] All file references across 1 skill(s) are valid.
        ✓ valid-refs: All file references resolve to existing files within the skill directory.

1 skill(s) linted, 1 passed

### Agent files detected (not linted by vally)
ℹ️ Vally currently lints SKILL.md content. Agent files were detected but skipped:
agents/sre-incident-responder.agent.md

[Copilot]

Pull request overview

Adds a resilience-engineering bundle to the Awesome Copilot collection: a new Skill for generating hypothesis-driven chaos experiments plus a new Agent for guiding incident response and Game Day execution. This extends the repository’s SRE/operations offerings with structured chaos-testing guidance and an incident-response playbook agent.

Changes:

• Added chaos-engineering-test-generator skill content and examples.
• Added sre-incident-responder agent definition for incident + Game Day workflows.
• Updated skills/agents documentation indexes to include the new entries (and reflect generated table formatting).

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
skills/chaos-engineering-test-generator/SKILL.md	New skill defining chaos experiment generation workflow, safety guidelines, and examples.
agents/sre-incident-responder.agent.md	New agent that guides triage/mitigation/diagnosis/communication/postmortems and can hand off to chaos skill for Game Days.
docs/README.skills.md	Adds the new skill to the published skills index.
docs/README.agents.md	Adds the new agent to the published agents index (and updates MCP column formatting for some rows).