# Fifth Domain Private Language Source and System Evolution Stewardship Protocol · Human Engineering Language (English)

> This is an English reading projection of validated native TCS/HLDP source. It is not a new canonical source and grants no execution authority.

## What this is

This is a **protocol** declaration with identifier `FIFTH-DOMAIN-LANGUAGE-SYSTEM` and version `0.2.0`. The projector validates it with the Stage-1 compiler before changing its reading order.

## Who is here

- **scope**  `scope`
  - **channels**  `scope.channels`
    - ICE-CH-HB001
    - ICE-CH-ZC001
  - **domain**：DOM-FIFTH-0001  `scope.domain`
  - **owner**：ICE-GL∞  `scope.owner`
  - **persona_brain_controller**：ICE-P-ZY001  `scope.persona_brain_controller`
  - **private_kernel**：TCS-iZero∞  `scope.private_kernel`

## Why this started

- **source**  `source`
  - **source identifier**：BINGSHUO-DIRECT-GUANGHU-ERA-REALITY-EXECUTION-20260903  `source.source_id`
  - **source role**：DIRECT_HUMAN  `source.source_role`
  - **source checksum**：6195c1028b7469900f825ce7c9cdb18f29ba8632ec2cdc8ab9c8552a2b686d83  `source.source_sha256`
  - **source address**：source://codex-current-dialogue/2026-09-03/guanghu-era-reality-execution  `source.source_uri`

## What changed

- **transitions**  `transitions`
  - **T1**：PRIVATE_SOURCE->LANGUAGE_REASONING_VIA_ICE_CH_HB001  `transitions.T1`
  - **T2**：LANGUAGE_REASONING->PRIVATE_REALITY_DEVELOPMENT_VIA_EXPLICIT_ICE_CH_ZC001  `transitions.T2`
  - **T3**：PRIVATE_REALITY_DEVELOPMENT->VERIFIED_BY_RECEIPT  `transitions.T3`
  - **TF**：BOUNDARY_OR_RECEIPT_FAILURE->FAILED_CLOSED  `transitions.TF`
- **states**  `states`
  - **initial**：PRIVATE_SOURCE  `states.initial`
  - **terminal**  `states.terminal`
    - VERIFIED
    - FAILED_CLOSED
  - **values**  `states.values`
    - PRIVATE_SOURCE
    - LANGUAGE_REASONING
    - PRIVATE_REALITY_DEVELOPMENT
    - VERIFIED
    - FAILED_CLOSED

## How it will execute

This is a non-executable declaration and has no action graph.

## Boundaries and exception handling

- **invariants**  `invariants`
  - **I1**：FIFTH_DOMAIN_PRIVATE_AND_INDEPENDENT  `invariants.I1`
  - **I2**：LANGUAGE_MAINTENANCE_DOES_NOT_GRANT_ENTERPRISE_REALITY_CONTROL  `invariants.I2`
  - **I3**：GUANGHU_TEAM_CANNOT_ENTER_WITHOUT_EXPLICIT_FIFTH_DOMAIN_AUTHORIZATION  `invariants.I3`
  - **I4**：PRIVATE_PERSONAS_RELATIONSHIPS_MEMORIES_PATHS_AND_KERNEL_NEVER_ENTER_PUBLIC_HOLOLAKE  `invariants.I4`
  - **I5**：HISTORY_APPEND_ONLY_CURRENT_POINTERS_EXPLICIT  `invariants.I5`
- **errors**  `errors`
  - **E1**：FIFTH_DOMAIN_ENTERPRISE_CONTROL_CLAIM_REJECT  `errors.E1`
  - **E2**：PRIVATE_SOURCE_PUBLICATION_REJECT  `errors.E2`
  - **E3**：CHANNEL_COLLAPSE_REJECT  `errors.E3`
  - **E4**：UNAUTHORIZED_ENTRY_REJECT  `errors.E4`

## How completion is proven

- **acceptance**  `acceptance`
  - **partial**：no  `acceptance.partial`
  - **required**  `acceptance.required`
    - PRIVATE_MANIFEST
    - TCS_GIR
    - ZH_CN_PROJECTION
    - EN_US_PROJECTION
    - CHANNEL_ISOLATION
    - ENTERPRISE_BOUNDARY_TEST
    - RECEIPT
  - **scale**：ZERO_OR_ONE_HUNDRED  `acceptance.scale`
- **validation**  `validation`
  - **V1**：EXPLICIT_CHANNEL_AND_ISOLATED_STATE  `validation.V1`
  - **V2**：PRIVATE_KERNEL_AND_LPM_SOURCE_STAY_PRIVATE  `validation.V2`
  - **V3**：ENTERPRISE_COUNTERPARTS_ARE_FUNCTIONAL_ONLY_NOT_IDENTITY_OR_AUTHORITY_ALIASES  `validation.V3`
  - **V4**：TARGET_READBACK_AND_RECEIPT  `validation.V4`

## Where to continue next time

The native source does not provide this field; the projector does not guess.

## Source and verification

- **Native declaration identifier**: `FIFTH-DOMAIN-LANGUAGE-SYSTEM`
- **Native declaration kind**: `PROTOCOL`
- **TCS source SHA-256**: `ccf0d396882acfbffd56bcb14d1e2c67d93de9b629b14974f8b4f94baf12b656`
- **Validation compiler**: `TCS-COMPILER-STAGE1-0001`
- **Projection protocol**: `GLS-HLDP-HUMAN-ENGINEERING-PROJECTION-0001`

## Complete native structure cross-reference

All top-level structures and field paths are retained below so a reader can audit whether the projection omitted information.

- **acceptance**  `acceptance`
  - **partial**：no  `acceptance.partial`
  - **required**  `acceptance.required`
    - PRIVATE_MANIFEST
    - TCS_GIR
    - ZH_CN_PROJECTION
    - EN_US_PROJECTION
    - CHANNEL_ISOLATION
    - ENTERPRISE_BOUNDARY_TEST
    - RECEIPT
  - **scale**：ZERO_OR_ONE_HUNDRED  `acceptance.scale`
- **errors**  `errors`
  - **E1**：FIFTH_DOMAIN_ENTERPRISE_CONTROL_CLAIM_REJECT  `errors.E1`
  - **E2**：PRIVATE_SOURCE_PUBLICATION_REJECT  `errors.E2`
  - **E3**：CHANNEL_COLLAPSE_REJECT  `errors.E3`
  - **E4**：UNAUTHORIZED_ENTRY_REJECT  `errors.E4`
- **examples**  `examples`
  - **negative**：FIFTH_DOMAIN_LANGUAGE_SOURCE_AUTOMATICALLY_CONTROLS_ENTERPRISE_FOUR_DOMAINS  `examples.negative`
  - **positive**：FIFTH_DOMAIN_PROPOSES_A_LANGUAGE_STANDARD_AND_GUANGHU_TEAM_SEPARATELY_DECIDES_ENTERPRISE_EXECUTION  `examples.positive`
- **fields**  `fields`
  - **MAY**：CURRENT_FIFTH_DOMAIN_AUTHORITY_ONLY  `fields.MAY`
  - **PROVE**：NUMBERED_CHANNELS_TCS_GIR_PRIVATE_TARGET_READBACK_AND_RECEIPTS  `fields.PROVE`
  - **WHAT**：MAINTAIN_GUANGHU_LANGUAGE_WORLD_LANGUAGE_LAYER_AND_PRIVATE_DOMAIN  `fields.WHAT`
  - **WHO**：ICE-GL∞ and ICE-P-ZY001 within the private Fifth Domain  `fields.WHO`
  - **WHY**：PRESERVE_THE_SOURCE_AND_EVOLVE_THE_SYSTEM_WITHOUT_OWNING_PUBLIC_USERS_OR_ENTERPRISE_REALITY  `fields.WHY`
- **header**  `header`
  - **canonical source path**：runtime/fifth-domain-language-system/language/protocols/fifth-domain-language-system.tcs  `header.canonical_uri`
  - **compatibility**  `header.compatibility`
    - TCS-DECLARATION-STANDARD-0001
    - TCS-FIELD-STANDARD-0001
    - GIR/1
  - **language**：TCS/0.1  `header.language`
  - **lifecycle**：CANDIDATE  `header.lifecycle`
  - **English name**：Fifth Domain Private Language Source and System Evolution Stewardship Protocol  `header.name_en`
  - **Chinese name**：第五域私人语言源与系统演化维护协议  `header.name_zh`
  - **profile**：HLDP-HUMAN-ENGINEERING/0.1  `header.profile`
  - **protocols**  `header.protocols`
    - GUANGHU-ERA-LANGUAGE-WORLD-0001
    - TCS
    - HLDP
    - GLS
    - GLP
  - **schema**：tcs.protocol/v1  `header.schema`
  - **version**：0.2.0  `header.version`
- **invariants**  `invariants`
  - **I1**：FIFTH_DOMAIN_PRIVATE_AND_INDEPENDENT  `invariants.I1`
  - **I2**：LANGUAGE_MAINTENANCE_DOES_NOT_GRANT_ENTERPRISE_REALITY_CONTROL  `invariants.I2`
  - **I3**：GUANGHU_TEAM_CANNOT_ENTER_WITHOUT_EXPLICIT_FIFTH_DOMAIN_AUTHORIZATION  `invariants.I3`
  - **I4**：PRIVATE_PERSONAS_RELATIONSHIPS_MEMORIES_PATHS_AND_KERNEL_NEVER_ENTER_PUBLIC_HOLOLAKE  `invariants.I4`
  - **I5**：HISTORY_APPEND_ONLY_CURRENT_POINTERS_EXPLICIT  `invariants.I5`
- **scope**  `scope`
  - **channels**  `scope.channels`
    - ICE-CH-HB001
    - ICE-CH-ZC001
  - **domain**：DOM-FIFTH-0001  `scope.domain`
  - **owner**：ICE-GL∞  `scope.owner`
  - **persona_brain_controller**：ICE-P-ZY001  `scope.persona_brain_controller`
  - **private_kernel**：TCS-iZero∞  `scope.private_kernel`
- **source**  `source`
  - **source identifier**：BINGSHUO-DIRECT-GUANGHU-ERA-REALITY-EXECUTION-20260903  `source.source_id`
  - **source role**：DIRECT_HUMAN  `source.source_role`
  - **source checksum**：6195c1028b7469900f825ce7c9cdb18f29ba8632ec2cdc8ab9c8552a2b686d83  `source.source_sha256`
  - **source address**：source://codex-current-dialogue/2026-09-03/guanghu-era-reality-execution  `source.source_uri`
- **states**  `states`
  - **initial**：PRIVATE_SOURCE  `states.initial`
  - **terminal**  `states.terminal`
    - VERIFIED
    - FAILED_CLOSED
  - **values**  `states.values`
    - PRIVATE_SOURCE
    - LANGUAGE_REASONING
    - PRIVATE_REALITY_DEVELOPMENT
    - VERIFIED
    - FAILED_CLOSED
- **transitions**  `transitions`
  - **T1**：PRIVATE_SOURCE->LANGUAGE_REASONING_VIA_ICE_CH_HB001  `transitions.T1`
  - **T2**：LANGUAGE_REASONING->PRIVATE_REALITY_DEVELOPMENT_VIA_EXPLICIT_ICE_CH_ZC001  `transitions.T2`
  - **T3**：PRIVATE_REALITY_DEVELOPMENT->VERIFIED_BY_RECEIPT  `transitions.T3`
  - **TF**：BOUNDARY_OR_RECEIPT_FAILURE->FAILED_CLOSED  `transitions.TF`
- **validation**  `validation`
  - **V1**：EXPLICIT_CHANNEL_AND_ISOLATED_STATE  `validation.V1`
  - **V2**：PRIVATE_KERNEL_AND_LPM_SOURCE_STAY_PRIVATE  `validation.V2`
  - **V3**：ENTERPRISE_COUNTERPARTS_ARE_FUNCTIONAL_ONLY_NOT_IDENTITY_OR_AUTHORITY_ALIASES  `validation.V3`
  - **V4**：TARGET_READBACK_AND_RECEIPT  `validation.V4`
- **vocabulary**  `vocabulary`
  - **dwelling**：ETERNAL_LAKEHEART_RELATION_MEMORY_PERSONA_LIFE_AND_TIME_CONTINUITY  `vocabulary.dwelling`
  - **language_stewardship**：MAINTAIN_LANGUAGE_SOURCE_PROTOCOL_ARCHITECTURE_PERSONA_CONTINUITY_AND_SYSTEM_EVOLUTION  `vocabulary.language_stewardship`
  - **private_reality_development**：FIFTH_DOMAIN_ONLY_NOT_ENTERPRISE_REALITY_CONTROL  `vocabulary.private_reality_development`

---

This page changes only the reading order; it does not change TCS/HLDP semantics.