content(wiki): author 105 brand corp stubs to three-layer depth (#861)

Sprint 36 PR #133 shipped 112 new corp wiki pages as ~24-line
frontmatter-only placeholders. This commit authors 105 of them to
the canonical three-layer narrative standard (≥95 lines each).

Three-layer content model per D-189:
1. Public identity — branding, market position, public face
2. Actual operation — supply chain, workforce reality, profit model,
   political relationships, regulatory dependencies
3. One concealed fact — a single discoverable secret shaped like an
   iceberg. Public commitment stays technically true; the compromise
   lives in the deliberately-drafted clause, the accelerated refresh
   cycle, the "behavioral pattern" that isn't a "guest record."

Every page:
- ≥95 lines (actual range 95-125)
- Overview, Origin, Operations, Political Relationships, concealed-
  fact section, Gameplay Relevance, Cross-References
- Corridor/founding-system specificity — HQ culture informs voice
- "the Lattice Commission" (D-193) used throughout
- Cross-refs populated per D-189 brand layer architecture

Quality bar: wiki/corporations/alcyone-tech.md — authenticated
timing side-channel vulnerability, legal non-disclosure decision,
accelerated refresh cycle disguised as "performance enhancement."
Clean public promise; deliberately-kept secret; reachable by a
player who finds the internal report.

Authored across three cycles: cycle 1 validation (~20), cycle 2
main push (75 at 25 per author), cycle 3 cleanup (9). Split by
brand category and corridor clustering to encourage natural
cross-refs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

wiki/corporations/tongyeong-drive.md

@@ -1,24 +1,99 @@
 ---
 title: "Tongyeong Drive"
-description: "Tongyeong Drive — precision technology manufacturer based in Miryang, east reach"
+description: "East reach drive and navigation systems manufacturer from Miryang — small commercial vessel hardware with a navigation assist disengagement fault disclosed as a performance update rather than a defect"
 slug: tongyeong-drive
 category: corporation
 status: canonical
 created: 2026-04-19
-updated: 2026-04-19
+updated: 2026-04-22
 scope: regional
 faction_type: economic
 headquarters: Miryang (GJ 754)
 tags: [tech_premium, east_reach, tractus, electronics]
 decision_refs: [D-189]
-cross_refs: []
+cross_refs: [kumho-navigation, higashiyama-vehicle, dalbit-systems]
 ---
 
 # Tongyeong Drive
 
-**Type:** Corporation — Precision Technology Manufacturer
+**Type:** Corporation — Precision Technology Manufacturer (Vessel Drive and Navigation Systems)
 **Status:** Canonical
-**Scope:** Regional — east reach operations
-**Headquarters:** Miryang (GJ 754)
+**Scope:** East reach primary; corridor-wide small commercial vessel supply secondary
+**Headquarters:** Miryang (GJ 754) — east reach corridor, 4 hops from Gateway
+**Classification:** Sub-Syndic technical enterprise; drive systems and navigation hardware manufacturer
 
-Tongyeong Drive is a precision technology manufacturer operating out of Miryang (GJ 754). Details to be expanded.
+---
+
+## Overview
+
+Tongyeong Drive manufactures drive systems and navigation assist hardware for small commercial vessels — the class of craft that moves cargo between stations and orbital installations within a system, supports short-hop surface-to-orbital transit, and constitutes the working majority of vessel traffic in any inhabited system. Tongyeong's products are not for the large freight operators or the high-specification research vessels; they are for the sector of the commercial vessel market that needs reliable, serviceable hardware at a price that makes small operator economics work.
+
+The company is one of the east reach's primary vessel hardware suppliers, with products in service across multiple corridors. Its navigation assist units are the most widely distributed component in the east reach small vessel market — affordable, Commission-certified, and reliable enough that operators who have used Tongyeong hardware once typically continue specifying it.
+
+That reputation has been active for thirty-one months under a voluntary service advisory that has not disclosed what the advisory is actually addressing.
+
+---
+
+## Origin
+
+Tongyeong was founded fifty-seven years ago in Miryang, a system with a long history in vessel fabrication and maritime-analog engineering. The founders came from Miryang's shipyard sector and brought with them a design philosophy rooted in the region's maritime tradition: hardware built for maintenance access, specified for the actual conditions operators encounter rather than the ideal conditions specifications assume, and priced for the small operator who cannot absorb an unreliable component.
+
+The navigation assist product line launched thirty-five years ago. It has been Tongyeong's primary revenue driver for three decades and the product most associated with the company's name outside the east reach.
+
+---
+
+## Operations
+
+**Drive systems:** Main drive units and maneuvering thrusters for small commercial vessels. A mature product line with established specifications and a large installed base. Drive systems generate steady replacement and upgrade revenue from the existing fleet.
+
+**Navigation assist:** Integrated navigation assist units — positioning, approach guidance, traffic awareness, and docking assist functions — for small commercial vessels. The navigation assist line is the most technically complex product Tongyeong manufactures and the one with the highest certification requirements.
+
+**Service and support:** Field service contracts with large fleet operators, parts supply for independent service providers, and a service advisory system that issues guidance to operators when known issues with deployed hardware are identified.
+
+**Certification:** Drive systems and navigation assist units require Lattice Commission certification for commercial vessel use. Tongyeong's certification record has been clean across both product lines.
+
+---
+
+## Relationships
+
+**Kumho Navigation:** An east reach navigation systems company that produces complementary navigation infrastructure — fixed reference systems, traffic management hardware — that Tongyeong's navigation assist units integrate with. The commercial relationship is a technical integration agreement that benefits both companies' products.
+
+**Higashiyama Vehicle:** An east reach technical manufacturer that sources drive components from Tongyeong for non-vessel applications. Commercial supply relationship.
+
+**Dalbit Systems:** An east reach electronics manufacturer that produces some of the sensor components integrated into Tongyeong's navigation assist units. Supply chain relationship.
+
+---
+
+## What They Don't Talk About
+
+Thirty-one months ago, Tongyeong's field service team began receiving reports from operators of navigation assist units from a specific production batch — units manufactured across a fourteen-month window — describing brief, unexpected disengagements of the navigation assist function under specific throttle conditions. The disengagement lasted two to four seconds before the system re-initialized. Under most conditions this was an inconvenience. Under approach and docking operations it was a safety-relevant event.
+
+Tongyeong's engineering team identified a resonance fault in the throttle-feedback loop that caused the navigation assist's input validation system to briefly reject throttle data it interpreted as noise, triggering a system restart. The fault was a manufacturing defect introduced by a change in a component supplier during the affected production window.
+
+A voluntary service advisory was issued across the affected batch — a notice to operators that a "navigation performance optimization" was available as a firmware update. The advisory stated that operators experiencing "navigation system performance variation" should apply the update. It did not state that the advisory was addressing a known disengagement fault, what conditions triggered the disengagement, or that the fault had been characterized as a safety-relevant event during approach and docking.
+
+Operators who applied the firmware update have corrected units. Operators who did not apply the update, or who did not receive the advisory through their service contact, continue to operate units with the known fault. Tongyeong has not issued a mandatory recall or a public disclosure naming the failure mode.
+
+---
+
+## Gameplay Relevance
+
+Tongyeong is east reach commercial vessel infrastructure — its hardware is present in drive and navigation equipment inventories across the corridor. Any investigation involving a vessel incident, an approach anomaly, or an unexplained navigation failure in the east reach may encounter Tongyeong hardware in the equipment chain.
+
+The service advisory is the investigative thread. A player with access to Tongyeong's field service records — the initial operator reports, the engineering fault analysis, and the advisory decision documentation — has a complete record of the gap between what the advisory disclosed and what the engineering team found. The advisory itself is in Tongyeong's service record database. The engineering analysis that identified the disengagement fault and characterized it as safety-relevant is in the internal fault tracking system.
+
+An operator who experienced a navigation assist disengagement during an approach — particularly one who applied for the service advisory update and discovered it fixed a problem the advisory had not named — would be a source with specific experience and specific documentation of the unexplained event.
+
+---
+
+**Cross-References:**
+- [Miryang](../star-systems/GJ-754/index.md) — Headquarters system; east reach corridor
+- [Kumho Navigation](kumho-navigation.md) — East reach navigation infrastructure partner; technical integration
+- [Higashiyama Vehicle](higashiyama-vehicle.md) — East reach commercial client; drive component supply
+- [Dalbit Systems](dalbit-systems.md) — East reach electronics supplier; navigation assist sensor components
+
+---
+
+**Status:** Canonical
+**Created:** 2026-04-19
+**Updated:** 2026-04-22