refactor(opencode): make primary policy headings self-contained

[xnoto]

Summary

Removes runtime-agent references to keeping primary policy headings aligned with default.md. Every full-capability primary agent now uses the self-contained ## Primary operating rules heading; the developer-facing architecture document explicitly keeps default.md as a maintainer reference and prohibits runtime prompts from referring agents to another agent file.

Fixes #

None — owner-requested prompt-context cleanup.

Type of change

• Bug fix
• Feature / enhancement
• Documentation
• Infrastructure (OpenTofu root or module)
• GitOps desired state (manifests, kustomize, charts, SOPS/KSOPS secrets)
• Container image
• CI / reusable workflow
• Refactor / cleanup
• Breaking change

Validation

• Required pull-request checks pass — workflow run 33917056127 succeeded: repository hygiene, Helm validation, changed-chart detection, and package opencode-server.
• Generated or centrally distributed files were regenerated by their owning automation, not hand-edited — none exist among the changed chart inputs.
• Reviewed the full branch diff: all nine primary-agent definitions now use the same self-contained heading, while the five subagent definitions contain no default.md alignment reference.

Impact and rollout

Producer: makeitworkcloud/charts owns the packaged OpenCode prompts and chart configuration.

This authored and validated change updates nine primary-agent prompts, documents the maintainer-only default.md reference, and bumps opencode-server from 0.1.61 to 0.1.62 because OCI chart versions are immutable. No generated copies, image pins, OpenCode default-agent selection, or GitOps source changes are modified.

After explicit merge approval, the charts main workflow will publish immutable chart version 0.1.62 and automatically create or update the separate kustomize-cluster version-pin PR. That desired-state PR, its merge, Argo CD reconciliation, workload health, and representative agent behavior are separate and currently unverified stages.

Rollback: select the prior immutable chart version through the canonical kustomize-cluster Application workflow; never republish or overwrite an OCI version.

Safety and secrets

• Contains no plaintext secrets, decrypted SOPS values, state files, kubeconfigs, tokens, or private endpoints
• No local OpenTofu init/plan/apply/destroy/import/state operations were run or claimed — plans come from pull-request checks
• Breaking or irreversible effects are described above with rollback notes — none expected; this changes prompt presentation only

GitHub Advanced Security secret scanning is unavailable for this repository; the non-sensitive, heading-and-documentation-only diff was manually reviewed, and PR CI remains the authoritative validation.

AI-assisted change: an OpenCode agent materially produced this refactor; reviewers should verify that the role-local policy remains unchanged and only its unhelpful runtime reference was removed.

[github-actions]

Chart CI passed

Repository hygiene and Helm validation passed. View the workflow run.