Record the adoption unit run and positive/negative evidence

Why: Phase 6 requires one positive executor run and the negative cases (missing config, bad receipt, out-of-scope path, unknown side effect) before adoption becomes active.
Evidence: .task/evidence/governance-adoption/ (SELF): governance check, agent-exec validate and adoption cases; this commit passed the generated pre-commit hook (admit).
Impact: task card and evidence logs only.
Refs: .task/feature-governance-adoption.md

.task/evidence/governance-adoption/00-20261017T080152Z.log

@@ -0,0 +1,19 @@
+command: scripts/dm governance check --repo . 
+cwd: /home/weichen/projects/Error-Code-System-wt-feature-governance-adoption
+head: 2e0f6e91975becd127b7e53c8484d94d2dda64b2
+exit: 0
+utc: 20261017T080152Z
+---
+ok gitlink deps/development-guidelines
+ok gitlink deps/development-manager
+ok agent-execution
+ok file AGENTS.md
+ok file PROJECT.md
+ok file policy/guidelines-adoption.md
+ok file .task/templates/task-card.md
+ok executable scripts/agent-exec
+ok executable scripts/hooks/pre-commit
+ok executable scripts/dm
+ok executable scripts/task
+ok adoption status
+ok fixtures

.task/evidence/governance-adoption/01-20261017T080152Z.log

@@ -0,0 +1,7 @@
+command: scripts/agent-exec validate --repo . 
+cwd: /home/weichen/projects/Error-Code-System-wt-feature-governance-adoption
+head: 2e0f6e91975becd127b7e53c8484d94d2dda64b2
+exit: 0
+utc: 20261017T080152Z
+---
+validate: ok

.task/evidence/governance-adoption/02-20261017T080152Z.log

@@ -0,0 +1,13 @@
+command: python3 /tmp/gov-neg/adopt_cases.py . 
+cwd: /home/weichen/projects/Error-Code-System-wt-feature-governance-adoption
+head: 2e0f6e91975becd127b7e53c8484d94d2dda64b2
+exit: 0
+utc: 20261017T080152Z
+---
+[object] Error-Code-System-wt-feature-governance-adoption HEAD=2e0f6e91975becd127b7e53c8484d94d2dda64b2
+PASS positive-run-apply: run exit=0 terminal=success apply exit=0 head=c718e67e686b
+PASS missing-config: run exit=2 terminal=invalid-config validate exit=2
+PASS bad-receipt: apply exit=4 head_unchanged=True msg=apply: no local integrity record: changed paths do not match the transport diff
+PASS out-of-scope-path: run exit=5 terminal=scope-expansion transport=False
+PASS unknown-side-effect: run exit=4 terminal=failed-unknown transport=False
+[verdict] ALL PASS cases=5

.task/feature-governance-adoption.md

@@ -28,6 +28,7 @@
 |---|---|---|---|---|---|---|---|---|---|
 | governance-adoption-Error-Code-System-r1 | 13 个允许路径（治理文件 + 两个 gitlink） |  | implementation | cursor→antigravity→pi | run 86b6cdd5（dm-server pinned，attempts=1） | cursor / not-observable | failed-unknown | 无（apply 快进） | 否 | /tmp/gov-receipt-Error-Code-System-r1.json |
 | 对账（r1） | 规范 worktree 仍为 2309c69 且干净；无 transport ref | — | — | — | — | — | 已对账；全新运行 r2（单元包追加禁止固定共享 /tmp 路径约束） | — | — | — |
+| governance-adoption-Error-Code-System-r2 | 13 个允许路径（治理文件 + 两个 gitlink） | 00384d80 | implementation | cursor→antigravity→pi | run 8ecd2d46（dm-server 42e675f，attempts=1） | cursor / not-observable | success | 2e0f6e91975b（apply 快进） | 否 | /tmp/gov-receipt-Error-Code-System-r2.json |
 
 ## 同步记录
 
@@ -43,3 +44,6 @@
 
 | 时间(UTC) | 命令 | 被测 HEAD | exit | 来源 | 摘要/位置 |
 |---|---|---|---|---|---|
+| 20261017T080152Z | `scripts/dm governance check --repo .` | 2e0f6e91975b | 0 | SELF | ok fixtures；[输出](evidence/governance-adoption/00-20261017T080152Z.log) sha256:6b57cfff826f0653 |
+| 20261017T080152Z | `scripts/agent-exec validate --repo .` | 2e0f6e91975b | 0 | SELF | validate: ok；[输出](evidence/governance-adoption/01-20261017T080152Z.log) sha256:717f480e4b76493e |
+| 20261017T080152Z | `python3 /tmp/gov-neg/adopt_cases.py .` | 2e0f6e91975b | 0 | SELF | [verdict] ALL PASS cases=5；[输出](evidence/governance-adoption/02-20261017T080152Z.log) sha256:19889998d101d0fc |