fix: isolate native application capture fixtures between runs

docs/EVIDENCE.md

@@ -57,6 +57,8 @@ R1 固定总出口的源码为 `ce9b24d`，早期 `2dc8d6d` / `9b16acc` 仍分
 | 候选 GUI 合法空标题（#45） | [真实 GUI 前后对照](../experiments/shell/results/2026-10-26-empty-title/validation.json)、[转换入口](../experiments/presentation/render.hpp)、[持续回归](../experiments/shell/candidate_title_test.cpp) | 真实空 OSC 标题使旧 UTF 转换抛异常；修后两 fresh GUI 正常，非法非空反例保留。不回填旧 normal-1 未知异常的根因。 |
 | More 尾部 ECH 与捕获时序（#42 限定修复） | [合同及来源](research/more-capture-ech.md)、[修复前后与同输入对照](../experiments/differential/results/2026-10-26-more-ech/validation.json)、[历史触发记录](../experiments/shell/results/2026-10-26-margin-state/validation.json) | Recovery ECH 缺失和旧捕获过早分开修正，同原件 whole/byte 红→绿；完整 More 提示、单 q/自然退出/EOF/Job0 独立核对。候选 pending-wrap 差异仍保留。 |
 
+[#52 native 捕获目录隔离](research/vim-fixture-isolation.md)保留同旧 EXE 的兄弟运行红例、修后完整 cmd/More/Vim 两轮和真实 stale-fixture 反例；GUI stage59 仍有本批真实红例，不能据此关闭 #52。
+
 ## 核心路线、参考与历史验证
 
 | 范围 | 结果与复现入口 | 可以支持的结论与限制 |

docs/research/vim-fixture-isolation.md

@@ -0,0 +1,29 @@
+# Vim 捕获的运行目录隔离
+
+[#52](https://github.com/JavaZeroo/termforge/issues/52) 的 native `new-buffer` 和 GUI stage59 是两条独立入口。本页只解释 native 捕获复用旧文件的原因；GUI 仍有真实失败，不能由本修正关闭 #52。
+
+## native 反例与修正
+
+原 `real_app_capture` 在新建输出目录的父目录运行应用。连续两个兄弟 capture 因而共享 `editor.txt`、`editor-startup.txt` 和 `editor-insert.txt`。第一轮 Vim 写盘后，第二轮打开已有的 12 字节文件，实际输出为 `"editor.txt" [unix] 1L, 12B`，原 `[New]` 断言必然失败。旧联合基线失败原件也具有这段输出。失败诊断中的 `editor_exit=91` 来自随后清理，不是 Vim 自然退出故障的证明。
+
+同一旧 EXE、官方 `1.25.260930003`、Console width flags24、同一父目录的两次完整 cmd/More/Vim 捕获已复现第一绿、第二红 `new-buffer`；每次独立父目录的对照均绿。因此，这条失败来自夹具路径复用，不能认定为 Console width 兼容缺陷。
+
+修正将应用工作目录设为本轮刚新建的 capture 目录。相对文件名、事件文件握手、输入字节、`[New]`、写盘内容、退出、真实 reader EOF 与外层 Job 检查均保留。兄弟运行和父目录已有文件不再影响本轮，也不会删除或覆盖父目录的文件。
+
+新增真实回归在父目录预置旧编辑文件和 READY/INSERT，然后执行两个兄弟 capture，检查各自新文件、事件及父目录原件未变。该回归对旧 EXE 真实失败，对本树重建的修正 EXE 通过；完整真实应用模块 9 项通过。详细身份、原期限、原件哈希和回收结果见[脱敏证据](../../experiments/conpty/results/2026-10-26-vim-fixture-isolation/validation.json)。
+
+## 复验
+
+先构建 `real_app_capture`，在当前进程 PATH 提供固定 Vim；设置 `TERMFORGE_REAL_APP_CAPTURE` 指向所验配置的实际 EXE。
+
+```powershell
+python -m unittest discover -s experiments/differential -p test_real_app_matrix.py -v
+```
+
+完整模块另需按 differential README 构建两方核心 trace。不要用系统 ConPTY 的成功代替显式官方配置。
+
+## 尚未闭合
+
+原 GUI `candidate-tui` 两轮本批仍为一绿一红；红例在 resize 后没有产生 InsertLeave，`:call writefile(...)` 成为插入内容，stage59 到原期限失败。两轮都回收为 Job0、私有 desktop 消失。目录隔离不影响此入口，尚无根因或修复结论。历史冻结基线、完整 TUI、呈现端点和后端整体回归仍分别保留。
+
+有停止条件的 GUI 探针也未形成修复：strace 包装的两次运行在 Vim 启动时触发另一种 `c0000005`，不计原症状；临时观察真实 WriteFile 成功字节的三轮均绿，其中两轮 Ctrl-O 命令先于 CPR，否定了“这个先后关系必然导致红例”的假设。观察代码已移除，重新构建的原入口两轮均绿，事件/写盘/回复原检查保持；这仍不能解释已保存的真实 stage59 红例。探针二进制未在还原前记录哈希，证据明确保留该身份缺口并排除为验收。下一次需定位真实控制台输入到 Vim resize/按键处理的边界，不能用这批绿例关闭 GUI 问题。

experiments/conpty/real_app_capture.cpp

@@ -70,7 +70,10 @@ int main(int argc, char** argv) {
         if (!IsProcessInJob(GetCurrentProcess(), nullptr, &contained) || !contained) return 2;
         const std::filesystem::path out = argv[1], vim = argv[2];
         require(std::filesystem::create_directories(out), "output directory already exists");
-        const auto root = out.parent_path();
+        // Each newly created capture owns its application fixtures as well as
+        // its traces. Sibling captures must not reuse editor contents or event
+        // files from an earlier run in their shared parent directory.
+        const auto root = out;
         unsigned long long shell_bytes = 0, pager_bytes = 0, editor_bytes = 0;
         {
             tf_conpty::Session session;

experiments/conpty/results/2026-10-26-vim-fixture-isolation/validation.json

@@ -0,0 +1,347 @@
+{
+  "schema": "termforge-vim-fixture-isolation-v1",
+  "scope": "native capture fixture isolation only; GUI stage59 remains open",
+  "base_source": "af563ba15aa5abf90a09ca55eb9c177ac873ecf0",
+  "fixed_source": "aa5fbe5f61d771b5ac7716ce4e77cb143baec3ef",
+  "backend": {
+    "identity": "reviewed-side-by-side-1.25.260930003",
+    "flags": 24
+  },
+  "application": {
+    "version": "Git for Windows MSYS Vim 9.1 patches 1-532 compiled 2024-07-09",
+    "exe_sha256": "2e0fda63a89171adfc46c9417d5105cc39ed778cc69a890b83a4eabc34e7646a"
+  },
+  "binary_sha256": {
+    "old_capture": "6203c2a5ddaebf756d959456265aa64d21f9286c59730123709211120dee7941",
+    "fixed_capture": "9d0d8d186f024993915465fc52d4f9e4cba34a014baee831a96d5611b0c7e10d",
+    "gui_original": "54105cbfc5ac7ab34fb6d18ba2672d06ed5c187bebeaee803322084e323a9c72"
+  },
+  "source_files": {
+    "experiments/conpty/real_app_capture.cpp": "14579e51ab1f11967634e491b0e430f4cb29d370e2be6d6a67d7f3bc77655075",
+    "experiments/differential/test_real_app_matrix.py": "7182266c031682f422529a851726ac653b85ef6f9ca05aaab3cd21559e2764fb"
+  },
+  "unchanged_contract": {
+    "capture_outer_seconds": 60,
+    "gate": "GO newline after Job assignment",
+    "real_cmd_more_vim": true,
+    "new_buffer_marker": "[New]",
+    "editor_text": "TF_VIM_REAL",
+    "reader_eof_required": 109,
+    "editor_normal_exit_required": 0,
+    "startup_milliseconds": 10000,
+    "new_buffer_milliseconds": 10000,
+    "insert_milliseconds": 10000,
+    "editor_exit_milliseconds": 15000
+  },
+  "same_parent_original": [
+    {
+      "supervision": {
+        "timed_out": false,
+        "returncode": 0,
+        "job_after": {
+          "active": 0,
+          "total": 8,
+          "terminated": 0
+        },
+        "cleanup_errors": []
+      },
+      "editor.bin": {
+        "bytes": 2099,
+        "sha256": "698a05e6e3d717fac41e72e7af4a0eb85ba946faa35c030e5e54b7687cf97e2c"
+      },
+      "shell.bin": {
+        "bytes": 64,
+        "sha256": "9c74f9134043ae20a6dccb278951365f8f65e4d13c2eef491737b5095da4538c"
+      },
+      "pager.bin": {
+        "bytes": 508,
+        "sha256": "f51912329ea7e8f696057afc48703ceced3d2e8d582f891239ebfcc2b08b1dc0"
+      },
+      "pager-lifecycle.json": {
+        "bytes": 287,
+        "sha256": "5f9cb64fee5d7f5edcf86005ab1c73c04f4dedd9a4e8975f61495235cf40c7ef"
+      },
+      "manifest.json": {
+        "bytes": 244,
+        "sha256": "dbd4eb828fa17de859963fd736d529d888aec64510b9d6523dd684d8852d3e61"
+      }
+    },
+    {
+      "supervision": {
+        "timed_out": false,
+        "returncode": 1,
+        "job_after": {
+          "active": 0,
+          "total": 8,
+          "terminated": 0
+        },
+        "cleanup_errors": []
+      },
+      "editor.bin": {
+        "bytes": 1999,
+        "sha256": "93adf25f57b7b31eacf242fe3229786b47e5148741c8074b74e775d43254f215"
+      },
+      "shell.bin": {
+        "bytes": 64,
+        "sha256": "9c74f9134043ae20a6dccb278951365f8f65e4d13c2eef491737b5095da4538c"
+      },
+      "pager.bin": {
+        "bytes": 508,
+        "sha256": "f51912329ea7e8f696057afc48703ceced3d2e8d582f891239ebfcc2b08b1dc0"
+      },
+      "pager-lifecycle.json": {
+        "bytes": 287,
+        "sha256": "5f9cb64fee5d7f5edcf86005ab1c73c04f4dedd9a4e8975f61495235cf40c7ef"
+      },
+      "editor-failure.json": {
+        "bytes": 270,
+        "sha256": "a2a39c3f6e40ee1b56a44a2b352abd725676727d56bbe176958ff0550fc699b4"
+      },
+      "failure": {
+        "stage": "new-buffer",
+        "error": "editor new buffer was not displayed",
+        "editor_exit": 91,
+        "child_signaled": true,
+        "editor_bytes": 1999,
+        "active_children": 0,
+        "cleanup_complete": true,
+        "capture_overflow": false
+      }
+    }
+  ],
+  "same_parent_fixed_with_stale_parent_fixtures": [
+    {
+      "supervision": {
+        "timed_out": false,
+        "returncode": 0,
+        "job_after": {
+          "active": 0,
+          "total": 8,
+          "terminated": 0
+        },
+        "cleanup_errors": []
+      },
+      "editor.bin": {
+        "bytes": 2099,
+        "sha256": "698a05e6e3d717fac41e72e7af4a0eb85ba946faa35c030e5e54b7687cf97e2c"
+      },
+      "shell.bin": {
+        "bytes": 64,
+        "sha256": "9c74f9134043ae20a6dccb278951365f8f65e4d13c2eef491737b5095da4538c"
+      },
+      "pager.bin": {
+        "bytes": 508,
+        "sha256": "f51912329ea7e8f696057afc48703ceced3d2e8d582f891239ebfcc2b08b1dc0"
+      },
+      "pager-lifecycle.json": {
+        "bytes": 287,
+        "sha256": "5f9cb64fee5d7f5edcf86005ab1c73c04f4dedd9a4e8975f61495235cf40c7ef"
+      },
+      "manifest.json": {
+        "bytes": 244,
+        "sha256": "dbd4eb828fa17de859963fd736d529d888aec64510b9d6523dd684d8852d3e61"
+      }
+    },
+    {
+      "supervision": {
+        "timed_out": false,
+        "returncode": 0,
+        "job_after": {
+          "active": 0,
+          "total": 8,
+          "terminated": 0
+        },
+        "cleanup_errors": []
+      },
+      "editor.bin": {
+        "bytes": 2099,
+        "sha256": "698a05e6e3d717fac41e72e7af4a0eb85ba946faa35c030e5e54b7687cf97e2c"
+      },
+      "shell.bin": {
+        "bytes": 64,
+        "sha256": "9c74f9134043ae20a6dccb278951365f8f65e4d13c2eef491737b5095da4538c"
+      },
+      "pager.bin": {
+        "bytes": 508,
+        "sha256": "f51912329ea7e8f696057afc48703ceced3d2e8d582f891239ebfcc2b08b1dc0"
+      },
+      "pager-lifecycle.json": {
+        "bytes": 287,
+        "sha256": "5f9cb64fee5d7f5edcf86005ab1c73c04f4dedd9a4e8975f61495235cf40c7ef"
+      },
+      "manifest.json": {
+        "bytes": 244,
+        "sha256": "dbd4eb828fa17de859963fd736d529d888aec64510b9d6523dd684d8852d3e61"
+      }
+    }
+  ],
+  "regression_test": {
+    "original_binary": "failed RuntimeError real application capture failed in 10.561s",
+    "fixed_binary": "passed in 0.688s",
+    "native_gate_module": "2 tests passed in 0.784s",
+    "full_real_app_matrix_module": "9 tests passed in 11.994s",
+    "full_real_app_log_sha256": "f721167b7bfd5f971b11396fa7bda3d0e2694142682c835bd17a91b35b2f152b"
+  },
+  "gui_original_two_runs": [
+    {
+      "passed": true,
+      "outer_timeout": false,
+      "job_after": {
+        "active": 0,
+        "total": 9,
+        "terminated": 0
+      },
+      "desktop_gone": true,
+      "evidence_sha256": {
+        "candidate-output.bin": "c8b801ffa250aa2360d19cb671feb6540d6f652a47e3801f50f7ed1ae23c9f60",
+        "candidate-insert-log.txt": "3d07108bcc44f0831b31530265fac711c1d1e69194aa9309897e4440c26de65a",
+        "candidate-resize-log.txt": "2d3db728e657a0e1ab99b23acb6b2d08c586c4eaba6e65a66ab65e7fb47693b7",
+        "candidate-startup-log.txt": "3dfa3fb239f56c778a1e9b33eb31328349edd155a95806dac4378904e88527e5"
+      }
+    },
+    {
+      "passed": false,
+      "outer_timeout": false,
+      "job_after": {
+        "active": 0,
+        "total": 7,
+        "terminated": 0
+      },
+      "desktop_gone": true,
+      "evidence_sha256": {
+        "candidate-output.bin": "fc43e5c356005f9c32847476d4bdba5fabaf51439083d8ac4e530d3e8bb5c883",
+        "candidate-insert-log.txt": "e6de4daeba1841783e7e22f81dbf87154f341c309dc5b54405e5fc2c2f3550a6",
+        "candidate-resize-log.txt": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
+        "candidate-startup-log.txt": "3dfa3fb239f56c778a1e9b33eb31328349edd155a95806dac4378904e88527e5"
+      }
+    }
+  ],
+  "limitations": [
+    "GUI stage59 has a fresh genuine red and is not fixed by fixture-directory isolation",
+    "Historical frozen joint baseline is unchanged",
+    "Capture exit_code91 is forced cleanup after new-buffer assertion failed; it is not a natural Vim exit",
+    "No full current official CTest matrix, actual presentation or complete TUI acceptance is claimed"
+  ],
+  "full_real_app_matrix": {
+    "candidate": "alacritty_terminal",
+    "version": "0.26.1-dev+termforge.4",
+    "capture_sha256": "9d0d8d186f024993915465fc52d4f9e4cba34a014baee831a96d5611b0c7e10d",
+    "core_trace_sha256": "44265fcaf1d54103eff1731c5c49cd5cca39c635ff303f2a6659c6b4ac63048e",
+    "candidate_trace_sha256": "9fd9c962e9837f2e764d91973f192f8ad77110020656d44350a9329d521828b4",
+    "runs": 3,
+    "counts": {
+      "match": 3
+    },
+    "execution_passed": true,
+    "real_application_covered": true,
+    "semantic_acceptance": false,
+    "presented_done": null,
+    "summary_sha256": "cced694562a16395e0d25cbad4a70ea639aabc9df49188351cae782f05d20c47"
+  },
+  "gui_after_native_fixture_fix": {
+    "runtime_source": "aa5fbe5f61d771b5ac7716ce4e77cb143baec3ef",
+    "binary_sha256": "ac7998c5c6b89f251e1fc83a773dcad31d63b55c10f69f04408dc1e4b2b97499",
+    "temporary_instrumentation_removed": true,
+    "same_runtime_as_gui_original_except_native_capture_fix": true,
+    "runs": [
+      {
+        "status": "passed",
+        "timed_out": false,
+        "exit_code": 0,
+        "job_after": {
+          "active": 0,
+          "total": 9,
+          "terminated": 0
+        },
+        "desktop_gone": true,
+        "raw_sha256": {
+          "candidate-output.bin": "7976fddf498096e0fa1ce90318ec6fb618d6d267ddbf1e89503bfd717471e832",
+          "candidate-insert-log.txt": "3d07108bcc44f0831b31530265fac711c1d1e69194aa9309897e4440c26de65a",
+          "candidate-resize-log.txt": "2d3db728e657a0e1ab99b23acb6b2d08c586c4eaba6e65a66ab65e7fb47693b7",
+          "candidate-startup-log.txt": "3dfa3fb239f56c778a1e9b33eb31328349edd155a95806dac4378904e88527e5"
+        }
+      },
+      {
+        "status": "passed",
+        "timed_out": false,
+        "exit_code": 0,
+        "job_after": {
+          "active": 0,
+          "total": 9,
+          "terminated": 0
+        },
+        "desktop_gone": true,
+        "raw_sha256": {
+          "candidate-output.bin": "4b415c29f16225a8c9df5d1fec37a128dfd91f405bf42878fdbd2d08bdeaa027",
+          "candidate-insert-log.txt": "3d07108bcc44f0831b31530265fac711c1d1e69194aa9309897e4440c26de65a",
+          "candidate-resize-log.txt": "2d3db728e657a0e1ab99b23acb6b2d08c586c4eaba6e65a66ab65e7fb47693b7",
+          "candidate-startup-log.txt": "3dfa3fb239f56c778a1e9b33eb31328349edd155a95806dac4378904e88527e5"
+        }
+      }
+    ],
+    "interpretation": "two current passes do not explain or fix the original genuine stage59 failure"
+  },
+  "bounded_gui_diagnostics": {
+    "accepted_as_fix": false,
+    "strace_wrapper": {
+      "runs": 2,
+      "failure": "different startup crash c0000005, GUI stage50, not original stage59",
+      "real_input_version_and_oracle_retained": true
+    },
+    "temporary_WriteFile_observer": {
+      "runs": [
+        {
+          "status": "passed",
+          "actual_write_order": [
+            [
+              "cursor-position-reply",
+              89
+            ],
+            [
+              "resize-command",
+              90
+            ]
+          ],
+          "all_reported_writes_successful": true,
+          "write_trace_sha256": "edcc9fe614bff32d753da8ab212362cf1101a5648ffbfe1fb701199688517a31"
+        },
+        {
+          "status": "passed",
+          "actual_write_order": [
+            [
+              "resize-command",
+              89
+            ],
+            [
+              "cursor-position-reply",
+              90
+            ]
+          ],
+          "all_reported_writes_successful": true,
+          "write_trace_sha256": "7738ce6719efc0f08b82117118e8efce118702132aa40f939774b0e09fdca0ba"
+        },
+        {
+          "status": "passed",
+          "actual_write_order": [
+            [
+              "resize-command",
+              89
+            ],
+            [
+              "cursor-position-reply",
+              90
+            ]
+          ],
+          "all_reported_writes_successful": true,
+          "write_trace_sha256": "cad8e5598daf7dc1ad1110b56ef675d6c5d1e21033d2b7ed02146dcd7bf5e9c2"
+        }
+      ],
+      "binary_sha256": null,
+      "binary_identity_limitation": "probe executable not hashed before restoring original source; excluded from acceptance",
+      "local_patch_sha256": "1b6da35b9be9ff84babecb60e36c46588306eac6df10ac2fe54ccb3dc2d87bb8",
+      "falsified_hypothesis": "Ctrl-O preceding CPR necessarily causes stage59 failure",
+      "remaining_unknown": "Where between console host input processing and Vim resize/key processing Ctrl-O ceased to act in the original failure"
+    },
+    "cleanup": "temporary source edits removed; final working tree rebuilt without observers"
+  }
+}