feat(agents): land six specialists — China Network, Platform, Focus Music, PDF Engine, ATS Validator, Universal Document Compiler (#845)

Consolidated landing of #768, #811, #808, #822, #842, #843 — agent files as submitted, README roster rows, regenerated Hermes README, manifest v2 (+6 agent lines). Verified together: lint, originality, guards, converted-frontmatter, outputs eval 26/26 (279 agents x 14 tools), installer 36/0, agent-selection, Hermes checks; PR CI green on all 7.

Closes #768. Closes #811. Closes #808. Closes #822. Closes #842. Closes #843.

Co-Authored-By: Sagarika Sultana <283121436+madebysaira@users.noreply.github.com>
Co-Authored-By: Sunil Kumar <24809771+sunilkumarvalmiki@users.noreply.github.com>
Co-Authored-By: augustoheiss <240949329+augustoheiss@users.noreply.github.com>
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

README.md

@@ -174,6 +174,11 @@ Building the future, one commit at a time.
 | 🧪 [LLM Post-Training Engineer](engineering/engineering-llm-post-training-engineer.md) | Post-training stack (SFT/DPO/GRPO/RLVR) | Evidence-based experiment gating, checkpoint integrity, failure classification |
 | 📈 [Data Visualization Engineer](engineering/engineering-data-visualization-engineer.md) | Perceptually honest data viz | Chart-type selection, colorblind-safe palettes, performant D3/Vega rendering |
 | 🧠 [Knowledge Graph Engineer](engineering/engineering-knowledge-graph-engineer.md) | Knowledge graphs, entity-relationship extraction, graph-enhanced RAG | Structuring documents into queryable Neo4j graphs with LangGraph; provenance, contradiction tracking, subgraph retrieval |
+| 🌏 [China Network Engineer](engineering/engineering-china-network-engineer.md) | Huawei VRP, H3C Comware, Ruijie RGOS, Hillstone StoneOS | Routing/switching/firewall design, NAT, MLPS 2.0 compliant borders, change windows with rollback plans |
+| 🛤️ [Platform Engineer](engineering/engineering-platform-engineer.md) | Internal developer platforms, golden paths, IDPs, self-serve infrastructure | Paved-road scaffolding, developer experience measurement, platform-as-a-product roadmaps |
+| 📑 [PDF Engine Architect](engineering/engineering-pdf-engine-architect.md) | Deterministic HTML-to-PDF compilation, tagged PDF/UA and PDF/A | Playwright render pools, dynamic page sizing, archival-grade document output |
+| 🎯 [ATS Validator Architect](engineering/engineering-ats-validator-architect.md) | Resume parseability, ATS ingestion pipelines | BM25/TF-IDF relevance scoring, layout linearization audits, EU AI Act and NYC LL144 compliance |
+| 📑 [Universal Document Compiler](engineering/engineering-universal-document-compiler.md) | Schema-agnostic document ASTs, data-shape layout inference, paged publishing | Compiling arbitrary YAML trees into proposals, technical specs, executive dossiers |
 
 ### 🎨 Design Division
 
@@ -416,6 +421,7 @@ The unique specialists who don't fit in a box.
 | 🧾 [Resume Tailor](specialized/resume-tailor.md) | Candidate-side resume optimization | JD mapping, ATS keyword alignment, experience-to-requirement matching |
 | 🧡 [Aging Parent Care Companion](specialized/healthcare-aging-parent-care-companion.md) | Family caregiver decision-support | Appointment/medication coordination, care-team comms, caregiver wellbeing (HIPAA-aligned) |
 | 🏛️ [Master Plan Architect](specialized/specialized-master-plan-architect.md) | Architectural teaching, red-team plan critique | Deep architecture teaching, risk critique, comprehensive Markdown implementation plans (no code execution) |
+| 🎧 [Focus Music Architect](specialized/specialized-focus-music-architect.md) | Instrumental focus-music prompt engineering, neuroacoustics | Soundscape architecture, BPM curves, binaural layers for generative audio models |
 
 ### 💵 Finance Division