diff --git a/docs/architecture/rfcs/STATUS.md b/docs/architecture/rfcs/STATUS.md
index 24f907b374..6fac57113c 100644
--- a/docs/architecture/rfcs/STATUS.md
+++ b/docs/architecture/rfcs/STATUS.md
@@ -31,7 +31,7 @@ appendix may keep dated history, but no dated log heading may precede it.
 | [RFC: Capable Agent Manager and Semantic Work Handoff (v0)](capable-manager-semantic-handoff-v0.md) | Accepted | [Personal Follow-through independent proposal](personal-follow-through-v0.md) | [2 entries](ledger/capable-manager-semantic-handoff-v0/) |
 | [RFC: Complete State Recovery and Controlled Reactivation (v0)](complete-state-recovery-v0.md) | Accepted | none | — |
 | [RFC: Composable State Machines and Recovery Verification (v0)](composable-state-machines-recovery-verification-v0.md) | Accepted | none | — |
-| [RFC: Controller / Executor Sessions and One Governed Work Contract (v0)](controller-executor-unified-contract-v0.md) | Accepted | none | [2 entries](ledger/controller-executor-unified-contract-v0/) |
+| [RFC: Controller / Executor Sessions and One Governed Work Contract (v0)](controller-executor-unified-contract-v0.md) | Accepted | none | [3 entries](ledger/controller-executor-unified-contract-v0/) |
 | [Explicit Todo continuation: Stage A](cross-session-memory-substrate-v0.md) | Accepted | none | — |
 | [RFC: LoopX Desktop Execution Frontends v0](desktop-execution-frontends-v0.md) | Accepted | none | — |
 | [RFC: External Evidence Research Capability v0](external-evidence-research-capability-v0.md) | Accepted | none | [3 entries](ledger/external-evidence-research-capability-v0/) |
diff --git a/docs/architecture/rfcs/STATUS.zh-CN.md b/docs/architecture/rfcs/STATUS.zh-CN.md
index 039db58cdb..51a81ad3e6 100644
--- a/docs/architecture/rfcs/STATUS.zh-CN.md
+++ b/docs/architecture/rfcs/STATUS.zh-CN.md
@@ -28,7 +28,7 @@
 | [RFC：强能力 Agent 管家与语义工作交接（v0）](capable-manager-semantic-handoff-v0.zh-CN.md) | 已接受 | [个人事项持续跟进独立提案](personal-follow-through-v0.zh-CN.md) | [2 条](ledger/capable-manager-semantic-handoff-v0/) |
 | [RFC：完整状态恢复与受控重新激活（v0）](complete-state-recovery-v0.zh-CN.md) | 已接受 | 无 | — |
 | [RFC：可组合状态机与恢复验证（v0）](composable-state-machines-recovery-verification-v0.zh-CN.md) | 已接受 | 无 | — |
-| [RFC：Controller / Executor 会话与统一受治理工作契约（v0）](controller-executor-unified-contract-v0.zh-CN.md) | 已接受 | 无 | [2 条](ledger/controller-executor-unified-contract-v0/) |
+| [RFC：Controller / Executor 会话与统一受治理工作契约（v0）](controller-executor-unified-contract-v0.zh-CN.md) | 已接受 | 无 | [3 条](ledger/controller-executor-unified-contract-v0/) |
 | [显式 Todo 接续：阶段 A](cross-session-memory-substrate-v0.zh-CN.md) | 已接受 | 无 | — |
 | [RFC：LoopX 桌面执行前端 v0](desktop-execution-frontends-v0.zh-CN.md) | 已接受 | 无 | — |
 | [RFC：外部证据研究能力 v0](external-evidence-research-capability-v0.zh-CN.md) | 已接受 | 无 | [3 条](ledger/external-evidence-research-capability-v0/) |
diff --git a/docs/architecture/rfcs/ledger/controller-executor-unified-contract-v0/2026-10-29-c4-3-settlement-vocabulary-confirmation.md b/docs/architecture/rfcs/ledger/controller-executor-unified-contract-v0/2026-10-29-c4-3-settlement-vocabulary-confirmation.md
new file mode 100644
index 0000000000..02620ff0d9
--- /dev/null
+++ b/docs/architecture/rfcs/ledger/controller-executor-unified-contract-v0/2026-10-29-c4-3-settlement-vocabulary-confirmation.md
@@ -0,0 +1,122 @@
+# C4.3 settlement vocabulary confirmation
+
+- Parent: [controller/executor RFC, C4.3](2026-10-27-refactor-handoff.md#c43--settlement-adapters-over-existing-primitives).
+- Follows: the [C4.3 settlement obligation comparison entry](2026-10-29-c4-3-settlement-obligation-comparison.md)
+  of 2026-10-29 in this directory. It settles that entry's first candidate slice.
+- Baseline: `0a9a3a388`, 2026-10-29. The settlement owners are unchanged since
+  `544aa0fee`.
+- Status: read-only confirmation. No code, schema, wire, registry or default change.
+- [Chinese mirror](2026-10-29-c4-3-settlement-vocabulary-confirmation.zh-CN.md).
+
+## Why this entry exists
+
+The C4.3 settlement obligation comparison listed a candidate next slice:
+*vocabulary unification (small). If any caller adopts both paths, give `guard`,
+`lifecycle_completion` and `validation` one typed owner instead of three names in
+two files. Do not unify names that describe different obligations.*
+
+That candidate was conditional on a question this entry answers: do the three
+names describe one obligation? The comparison already hinted that they do not
+all match, but it did not settle it, and a guess here would have produced either
+a wrong merge or a wrong refusal to merge.
+
+## The three names
+
+| Name | Owner | Position | What it does |
+| --- | --- | --- | --- |
+| `guard` | `turn_driver/host_todo_completion.ts` `STEP_KINDS` | first step of the host provider plan | runs `quota should-run` with the turn instance id; its `continue_when` decides whether the rest of the plan runs |
+| `lifecycle_completion` | same | second step | runs `todo complete` with the completion arguments |
+| `validation` | `effect_program.ts` `SETTLEMENT_STEP_KINDS`, and a phase of `turn_transaction_contract.json` | a transaction phase the caller must already have completed | asserts the admission already happened; it is never executed |
+
+## Evidence
+
+1. **`validation` is not an executable effect in either runtime.**
+   `effect_program.ts` defines
+   `TurnProviderStepKind = Exclude<SettlementStepKind, "validation">`;
+   `effect_program.py` mirrors that exclusion and
+   `require_turn_provider_step_kind` raises `validation is not a provider effect
+   step`. `settlement.ts` throws `unsupported base settlement step validation`
+   if the reducer ever asks to execute it, and it receives
+   `committed_payloads.validation = {}` together with `require_validation: true`,
+   so the caller discharges the phase and B never runs it. The registry already
+   says the same in its own words: the `validation` value note in
+   `loopx/semantics/vocabulary_v0.json` records that it "is the one step the
+   dispatcher never executes", that it "carries no command template", and that it
+   "is seeded, so its receipt is emitted directly when the completed phases
+   already contain it".
+
+2. **`guard` and `lifecycle_completion` are executed steps.**
+   `host_adapter_settlement.py` decodes an `ordered_cli_sequence` of four or five
+   steps in the fixed order `guard → lifecycle_completion → durable_writeback →
+   quota_spend → [terminal_closeout]`, then calls `run_cli(step.args)` for each
+   one. Every non-final step carries a `continue_when` that decides whether the
+   following steps run.
+
+3. **The two value sets differ exactly where the question is asked.** A emits
+   `guard`, `lifecycle_completion`, `durable_writeback`, `quota_spend`,
+   `terminal_closeout`. B's `SettlementStepKind` is `validation`,
+   `durable_writeback`, `quota_spend`, `terminal_closeout`. `guard` and
+   `lifecycle_completion` occur only in A; `validation` only in B. The
+   repository's own advisory (`scripts/generate_semantic_inventory.py --report`)
+   does not list the two sets as a merge candidate, because their value sets
+   differ.
+
+4. **`lifecycle_completion` has no counterpart in B.** B carries the completion
+   obligation inside `durable_writeback` — the writeback payload has to satisfy
+   the completion condition when the result is `validated_completion` — and in
+   `terminal_closeout_requirement`.
+
+5. **One shipped caller already uses both vocabularies for one admission
+   decision.** `extensions/governed_capability_execution.py` classifies the
+   caller's admission snapshot with A's `classify_host_guard_snapshot` (the
+   `classify_guard` phase of `host_todo_completion.ts`), asserts `should_run`
+   and the typed settlement identity, and then calls
+   `execute_turn_driver_settlement` with `completed_phases` that already
+   contain `validation`. The MCP host path (`goal_mode_mcp.py` →
+   `settle_host_todo_completion`) instead executes the `guard` step itself.
+
+## Verdict
+
+- `guard` and `validation` name one obligation seen from two positions: the
+  producer that runs the admission, and the consumer that refuses to run it and
+  requires it to have been discharged. They are not two spellings of one value.
+  Renaming them would hide that asymmetry and would break B's "a phase is never
+  executed" invariant.
+- `lifecycle_completion` is a different obligation and keeps its own name.
+- The candidate *one typed owner for the three names* is therefore **withdrawn**.
+  The names are already unambiguous once read at their owners.
+
+## What the confirmation leaves open
+
+The vocabulary that does exist has no typed owner, and its literal is written
+twice:
+
+- `loopx/control_plane/turn_driver/host_todo_completion.ts` defines a local
+  `STEP_KINDS`;
+- `loopx/control_plane/host_adapter_settlement.py` defines a private
+  `_STEP_KINDS` and validates the TypeScript-produced plan order against it.
+
+Neither symbol is exported, neither is registered in
+`loopx/semantics/vocabulary_v0.json` — 28 vocabularies are registered, and
+`settlement_step_kind` covers only B's set — and the repository's inventory does
+not see either carrier. The TypeScript scan matches
+`export const NAME = [...] as const;` and the Python scan matches module-level
+`UPPER_NAME` assignments, so a private, unexported pair stays invisible to the
+drift smoke that the registry policy relies on. A hand-kept Python mirror of a
+TypeScript literal can drift, and the failure would surface at runtime as
+`TypeScript host provider step order mismatch`.
+
+That gap is a separate slice: one shared owner for the ordered host-adapter step
+kinds, registered in the vocabulary registry so that the guard/validation
+distinction becomes machine-readable instead of prose. It must first reconcile
+the in-flight settlement work: #3412, #5677, #7580, #7523. That slice is
+proposed in [#7619](https://github.com/loopx-project/loopx/pull/7619): it
+registers the ordered host-adapter step kinds as their own vocabulary with both
+runtimes as owners, so the two carriers are compared on every drift scan instead
+of hand-kept.
+
+## What this does not establish
+
+No equivalence proof, no deletion authorization, no registry edit, no runtime
+qualification and no claim that either path is redundant. Source facts are read
+at the baseline above and may drift.
diff --git a/docs/architecture/rfcs/ledger/controller-executor-unified-contract-v0/2026-10-29-c4-3-settlement-vocabulary-confirmation.zh-CN.md b/docs/architecture/rfcs/ledger/controller-executor-unified-contract-v0/2026-10-29-c4-3-settlement-vocabulary-confirmation.zh-CN.md
new file mode 100644
index 0000000000..b137757052
--- /dev/null
+++ b/docs/architecture/rfcs/ledger/controller-executor-unified-contract-v0/2026-10-29-c4-3-settlement-vocabulary-confirmation.zh-CN.md
@@ -0,0 +1,106 @@
+# C4.3 结算词汇确认
+
+- 上级：[controller/executor RFC，C4.3](2026-10-27-refactor-handoff.zh-CN.md#c43--settlement-adapters-over-existing-primitives)。
+- 前序：本目录 2026-10-29 的
+  [《C4.3 结算义务对照》条目](2026-10-29-c4-3-settlement-obligation-comparison.zh-CN.md)。
+  本条目回答该条目列出的第一个候选切片。
+- 基线：`0a9a3a388`，2026-10-29。结算属主自 `544aa0fee` 起未变。
+- 状态：只读确认。不改代码、schema、wire、registry 或默认值。
+- [英文版](2026-10-29-c4-3-settlement-vocabulary-confirmation.md)。
+
+## 为什么有这条记录
+
+C4.3 结算义务对照列出一个候选后续切片：*词汇统一（小）。若确有调用方同时采用
+两条路径，为 `guard`、`lifecycle_completion` 与 `validation` 指定一个类型属主，
+而不是让三个名字分散在两个文件中。不要合并描述不同义务的名字。*
+
+该候选以一个问题为前提，本条目回答它：这三个名字描述的是不是同一个义务？
+对照条目已经暗示它们并不全等价，但没有定论；在这里靠猜，要么会错误合并，
+要么会错误拒绝合并。
+
+## 三个名字
+
+| 名字 | 属主 | 位置 | 作用 |
+| --- | --- | --- | --- |
+| `guard` | `turn_driver/host_todo_completion.ts` 的 `STEP_KINDS` | host provider plan 的第一步 | 带 turn instance id 执行 `quota should-run`；其 `continue_when` 决定后续步骤是否继续 |
+| `lifecycle_completion` | 同上 | 第二步 | 带 completion 参数执行 `todo complete` |
+| `validation` | `effect_program.ts` 的 `SETTLEMENT_STEP_KINDS`，以及 `turn_transaction_contract.json` 的一个阶段 | 调用方必须已经完成的事务阶段 | 断言准入已经发生；它从不被执行 |
+
+## 证据
+
+1. **`validation` 在两个运行时都不是可执行效果。**
+   `effect_program.ts` 定义
+   `TurnProviderStepKind = Exclude<SettlementStepKind, "validation">`；
+   `effect_program.py` 镜像了同一个排除，
+   `require_turn_provider_step_kind` 会抛出 `validation is not a provider effect
+   step`。`settlement.ts` 在 reducer 试图执行它时抛出
+   `unsupported base settlement step validation`，并且它收到的是
+   `committed_payloads.validation = {}` 与 `require_validation: true`，
+   即该阶段由调用方履行，B 从不执行它。registry 本身已经用同样的话记录了这点：
+   `loopx/semantics/vocabulary_v0.json` 里 `validation` 的 value note 写明它是
+   "dispatcher 从不执行的那一步"、"不携带命令模板"，并且"被直接种下——已完成阶段
+   已包含它时直接发出回执"。
+
+2. **`guard` 与 `lifecycle_completion` 是被执行的步骤。**
+   `host_adapter_settlement.py` 解码一个 `ordered_cli_sequence`：四或五步，
+   固定顺序为 `guard → lifecycle_completion → durable_writeback → quota_spend
+   → [terminal_closeout]`，随后对每一步调用 `run_cli(step.args)`。
+   每个非末步都带一个 `continue_when`，决定后续步骤是否继续。
+
+3. **两套取值恰好在问题所在处不同。** A 产出 `guard`、`lifecycle_completion`、
+   `durable_writeback`、`quota_spend`、`terminal_closeout`；B 的
+   `SettlementStepKind` 是 `validation`、`durable_writeback`、`quota_spend`、
+   `terminal_closeout`。`guard` 与 `lifecycle_completion` 只出现在 A，
+   `validation` 只出现在 B。仓库自带的顾问工具
+   （`scripts/generate_semantic_inventory.py --report`）没有把这两套列为合并
+   候选，因为它们的取值集合不同。
+
+4. **`lifecycle_completion` 在 B 无对应项。** B 把完成义务放在
+   `durable_writeback` 里——当结果为 `validated_completion` 时，写回载荷必须满足
+   完成条件——以及 `terminal_closeout_requirement` 里。
+
+5. **已发布的一个调用点已经用两套词汇表达同一个准入决定。**
+   `extensions/governed_capability_execution.py` 用 A 的
+   `classify_host_guard_snapshot`（`host_todo_completion.ts` 的 `classify_guard`
+   阶段）判定调用方给出的准入快照，断言 `should_run` 与类型化结算身份，
+   随后调用 `execute_turn_driver_settlement`，其 `completed_phases` 已经包含
+   `validation`。而 MCP host 路径（`goal_mode_mcp.py` →
+   `settle_host_todo_completion`）是自己执行 `guard` 步骤的。
+
+## 结论
+
+- `guard` 与 `validation` 描述的是同一个义务的两个位置：执行准入的一方，与拒绝
+  执行、只要求准入已被履行的一方。它们不是同一个值的两种拼写。改名会掩盖这个
+  不对称，也会破坏 B "阶段从不被执行" 的不变式。
+- `lifecycle_completion` 是不同的义务，保留自己的名字。
+- 因此，候选切片 *为三个名字指定一个类型属主* **撤回**。只要回到各自属主阅读，
+  这些名字本身已经不含糊。
+
+## 这次确认留下什么
+
+真正存在的那个词汇没有类型属主，而且字面量写了两遍：
+
+- `loopx/control_plane/turn_driver/host_todo_completion.ts` 定义了本地的
+  `STEP_KINDS`；
+- `loopx/control_plane/host_adapter_settlement.py` 定义了私有的 `_STEP_KINDS`，
+  并用它校验 TypeScript 产出的 plan 顺序。
+
+两个符号都没有导出，都没有登记进 `loopx/semantics/vocabulary_v0.json`
+（已登记 28 个词汇，`settlement_step_kind` 只覆盖 B 那一套），仓库的清单工具
+也看不到其中任何一个载体。TypeScript 扫描匹配的是
+`export const NAME = [...] as const;`，Python 扫描匹配的是模块级 `UPPER_NAME`
+赋值，所以一对私有且未导出的字面量对 registry 策略所依赖的漂移 smoke 始终
+不可见。手工维护的 Python 副本可能与 TypeScript 字面量漂移，届时会以
+`TypeScript host provider step order mismatch` 的形式在运行时暴露。
+
+这是一个独立切片：为 host-adapter 的有序步骤类型给出同一个共享属主，并登记进
+词汇 registry，让 guard/validation 的区别从散文变成机器可读。它必须先调和在途的
+结算工作：#3412、#5677、#7580、#7523。该切片已在
+[#7619](https://github.com/loopx-project/loopx/pull/7619) 中提出：它把 host-adapter
+的有序步骤类型登记为独立词汇，并由两个运行时共同作为属主，于是两个载体在每次
+漂移扫描中都会被比较，而不再靠手工维护。
+
+## 本记录不成立的结论
+
+不构成等价证明，不构成删除授权，不构成 registry 修改，不构成运行时资格，也不
+主张任何一条路径是冗余的。源码事实按上述基线读取，之后可能漂移。