Modernize AGENTS.md, add MCP memory reference server, generator golden tests & docs

.eslintrc.cjs

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+module.exports = {
+  root: true,
+  env: {
+    node: true,
+    es2022: true
+  },
+  parserOptions: {
+    ecmaVersion: 2022,
+    sourceType: 'module'
+  },
+  extends: ['eslint:recommended'],
+  ignorePatterns: ['node_modules/', 'test-output/', 'dist/', 'build/']
+};

.github/ISSUE_TEMPLATE/agent-task.md

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+---
+name: Agent Task
+about: Structured task template for agentic coding
+labels: [agent-task]
+---
+
+## Goal
+
+<!-- What needs to be done? -->
+
+## Constraints
+
+-
+
+## Acceptance Criteria
+
+- [ ]
+
+## Validation
+
+- [ ] `make validate`
+
+## Notes
+
+- Link to relevant docs or prompts

.github/copilot-instructions.md

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+# GitHub Copilot Instructions (Agent Mode)
+
+This repository is **AGENTS.md-first**. Always read and follow `AGENTS.md` before making changes.
+
+## Required Workflow
+
+1. Keep changes scoped to the task.
+2. Do not add dependencies without explicit approval.
+3. Run `make validate` before finishing.
+4. Report exact commands and results in the PR.
+
+## Helpful References
+
+- `AGENTS.md` – canonical rules
+- `docs/guides/COPILOT_AGENT_MODE.md` – Copilot agent workflow
+- `docs/templates/AGENT_TASK_CHECKLIST.md` – coordination checklist

.github/pull_request_template.md

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+# Summary
+
+-
+
+## Validation
+
+- [ ] `make validate`
+
+## Agent Checklist (if applicable)
+
+- [ ] Followed `AGENTS.md`
+- [ ] No new dependencies without approval
+- [ ] Tests updated (unit/integration/golden as needed)
+- [ ] Risks and follow-ups documented