docs(task): summarize autonomous-engine-architecture image

[krokoko]

Summary

• Adds a one-sentence summary of the autonomous-engine-architecture.png image to docs/image-summaries.md
• The image shows a layered autonomous agent engine architecture with a central "Universal Agent Engine" handling prepare/execute/classify-and-route phases, organizational trust/governance layers, and input-to-output flows

Image Summary (one sentence):

The image depicts an autonomous agent engine architecture showing a layered system with a central "Universal Agent Engine" that prepares, executes, and classifies/routes tasks, surrounded by organizational layers for trust/change management/quality at the top, governance/operations/security controls at the bottom, and various input sources (e.g., real-time events, on-demand, scheduled) on the left feeding into outputs like code, documents, and research on the right.

Build and test results

• mise run build: ✅ PASS (lint + fmt:check + security all passed)
• mise run lint:md: ✅ PASS (0 errors across 258 files)
• mise run fmt:check: ✅ PASS
• mise run security: ✅ PASS (no leaks, no vulnerabilities)

Decisions made

The task requested summarizing an image with no code output specified. I persisted the summary in docs/image-summaries.md as a lightweight record, since a PR requires at least one commit ahead of main. The summary is factual and captures all major architectural components visible in the diagram.

Agent notes

What went well: The architecture diagram was clearly labeled, making it straightforward to identify all key components (layers, engine phases, inputs, outputs). All linters and build checks passed on the first run.

What was difficult: The task required no code changes, so a minimal documentation file was created to enable the PR. This is a common pattern for purely analytical tasks.

Patterns/conventions discovered:

• Repo uses mise run build (lint + fmt:check + security) as the full build gate
• Markdown formatting is enforced via dprint and markdownlint-cli2
• Conventional commit format <type>(<module>): description is standard
• The docs/ directory is the appropriate location for non-plugin documentation

Suggestions for future tasks: For image analysis tasks, consider whether the summary should be stored in a task-specific location rather than a shared image-summaries.md file.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of the project license.