Record r0.6 zero-paid progress and pin alignment

Why: Tasks 1-3 landed, every component was synced with main, and the agent-intent pin chain had to be aligned for make test-pins.
Evidence: make test-pins on Dev d5d87cb returned "pins ok" (SELF receipt imported by make evidence).
Impact: Task card only.
Refs: .task/feature-fast-slow-u2-u3-plan.md
Co-authored-by: Cursor <cursoragent@cursor.com>

.task/feature-fast-slow-u2-u3-plan.md

@@ -42,6 +42,14 @@ Backend `c23239e` 用有限枚举归一化受控记录的 `finish_reason` 与读
 
 上述仅为零付费机制及界面观察；真实模型 r0.5 A01 `NOT_RUN`，不能推断供应商是否提供完整 `[DONE]`、两个有用阶段成果或最终正文。r0.4 真实质量 FAIL 不改判，八个 PR 继续草稿。
 
+## r0.6 零付费实施进展（2026-10-19 接管）
+
+- 授权：用户批准 r0.6 [实施计划](modules/documents/docs/proposals/2026-10-14-fast-slow-u3-r06-transport-evidence-implementation-plan.md)进入零付费实施（`approve_r06`）；付费探针与 A01 须另交资源提案，本卡不构成该授权。
+- 主干同步（全部经 agent-exec transport 集成，原分支历史以 `merge -s ours` 保留）：Agent-Native #46、Core #31 `0cf0344`、UI #51 `316891b`、Documents #95 `6e21122`、Backend #193、Frontend #79 `b4fec2f`、Dev #512 均已纳入各自 main。Backend 同步按 main #204 把后台结果改走持久工作卡（不再起前台通知回合或 `confirm_choice`），材料选项仍只取通过核验的建议；r0.5 宿主确认 `material_ack.go` 与 fast-slow 分支逐字节一致。Frontend knip 基线 58：新增 8 个未用导出均为 Core 契约镜像类型，与 main 基线同类。
+- Task 1/2（Agent-Native 响应体边界与 SSE 尾部分类）：`b6a8433`；Task 3（Backend 无内容归一化与失败后停止）：Backend `611cf1b`，RED 为哨兵 `PRIVATE_TAIL_R06` 与负计数未归一，GREEN 后两项新测试与五项对照通过。
+- pin 对齐：Squad main #54 把 agent-intent 升到 `651a2e1`（只含治理文件），而 Native 仍固定 `343b1e6`，`make test-pins` 不能通过。按依赖顺序对齐：Native #46 `28f3ea7` → Squad #53 `11ff3a0` → Backend #193 `9bcf1b5`（intent `651a2e1`）→ Dev。Dev `d5d87cb` 的 `make test-pins` 为 `pins ok`（SELF，见下方证据）。
+- 待办：Dev 准确 HEAD 的 `make test`／`make build`、任务自有 mechanism 实例的 Playwright、隔离 PG 与三项 CI GATE、独立复审，然后提交阶段 6 材料与资源提案。
+
 ## 目标与范围
 
 真实状态、发现、来源和终态更新同一张卡；渐进阅读，默认三项普通发现，关键问题/修正可见；保持既有三栏和单文件预览，后台不抢阅读。Task1–6已本地实施，Task7保留失败并修复观察到的问题；U3尚未通过。
@@ -9364,3 +9372,44 @@ Dev草稿PR #512及Core #31、Backend #193、Frontend #79、UI #51、Documents #
   "receipt_sha256": "01697d4370fe9b7e7d96e215bf326f5572adc57e6cb9bec72be7234d06465d3b"
 }
 ```
+
+<!-- Local receipt: SELF. Digests detect corruption; they do not authenticate a reviewer or CI. -->
+```json
+{
+  "summary_schema": 1,
+  "source": "SELF",
+  "timestamp": "2026-10-19T03:56:29.299094+00:00",
+  "command": "make test-pins",
+  "exit_code": 0,
+  "cwd": "/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan",
+  "before_head": "d5d87cbdbecaeb7a7ebd0a2dbe6d02317114638a",
+  "after_head": "d5d87cbdbecaeb7a7ebd0a2dbe6d02317114638a",
+  "branch": "feature/fast-slow-u2-u3-plan",
+  "target_branch": "main",
+  "target_head": "7716b28cfff5200e7cfe9ec75aff5bcd71b234ed",
+  "root_target": "main",
+  "immediate_target": "main",
+  "before_tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+  "after_tracked_diff_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+  "output_tail": [
+    "warn: deps/agent-native deps/development-manager is bd3a7de57a3a, Dev is 6c019595fa02",
+    "ok deps/agent-native error-code-system",
+    "ok deps/agent-native logging-system",
+    "ok deps/agent-squad agent-intent",
+    "ok deps/agent-squad agent-native",
+    "warn: deps/agent-squad deps/development-guidelines is 2688fd2be6a5, Dev is a15db5085585",
+    "warn: deps/agent-squad deps/development-manager is bd3a7de57a3a, Dev is 6c019595fa02",
+    "ok deps/agent-squad error-code-system",
+    "ok deps/agent-squad logging-system",
+    "warn: deps/agent-intent deps/development-guidelines is 2688fd2be6a5, Dev is a15db5085585",
+    "warn: deps/agent-intent deps/development-manager is bd3a7de57a3a, Dev is 6c019595fa02",
+    "ok deps/agent-intent error-code-system",
+    "ok deps/agent-intent logging-system",
+    "pins ok",
+    "make[1]: Leaving directory '/home/weichen/projects/Agent-System-Dev-wt-feature-fast-slow-u2-u3-plan'"
+  ],
+  "output_sha256": "575029da722504caf55f6e8c556c3feb62bcf17e0fdef32c67e0da407c4ad34c",
+  "receipt_sha256": "367d24d90fae445695bdf7d78d534d12208b7fc9b8f993e7bdcc55f946b11606",
+  "receipt_path": "/home/weichen/.cache/agent-system-dev/evidence/367d24d90fae445695bdf7d78d534d12208b7fc9b8f993e7bdcc55f946b11606.json"
+}
+```