diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/.gitattributes b/harness/experiments/text-navigation-native-20260911/initial-trial/.gitattributes
new file mode 100644
index 00000000..fa1385d9
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/.gitattributes
@@ -0,0 +1 @@
+* -text
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/README.md b/harness/experiments/text-navigation-native-20260911/initial-trial/README.md
new file mode 100644
index 00000000..e7b17a16
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/README.md
@@ -0,0 +1,13 @@
+# Initial DF71 native trial
+
+This is failed-trial evidence, not native release acceptance. See the
+[evaluation](../../../release-text-navigation-native-initial-20260911.md) for
+observed passes, four defects, counterevidence, saved-byte comparison and scope.
+
+`manifest.json` describes 52 exact copied payloads; this README and
+`.gitattributes` are explanatory/control files outside that payload list.
+Screenshots are numbered by the actual sequence. Launch, binary readback and
+oracle receipts retain their timestamps and exact commands. The final saved
+checkpoint is `valid-navigation-final-saved`; the earlier similarly named
+checkpoint proves disk equality only. No large executable, private runtime
+profile or credentials are included.
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/binary-after-close.json b/harness/experiments/text-navigation-native-20260911/initial-trial/binary-after-close.json
new file mode 100644
index 00000000..fa6faeaa
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/binary-after-close.json
@@ -0,0 +1,8 @@
+{
+  "atUtc": "2026-09-11T19:00:35.429459+00:00",
+  "files": {
+    "arcadia-studio.exe": "df7126b8fc14c90985c2a0c55a640990f990e487d95a33f194aa7238754ceabd",
+    "libunwind.dll": "f45604a12e8bcd839fd86f667c1be1cc7c4f9da2b3c69ff381ac708f0e1ae7d4"
+  },
+  "unchanged": true
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/binary-before.json b/harness/experiments/text-navigation-native-20260911/initial-trial/binary-before.json
new file mode 100644
index 00000000..18936270
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/binary-before.json
@@ -0,0 +1,4 @@
+{
+  "arcadia-studio.exe": "df7126b8fc14c90985c2a0c55a640990f990e487d95a33f194aa7238754ceabd",
+  "libunwind.dll": "f45604a12e8bcd839fd86f667c1be1cc7c4f9da2b3c69ff381ac708f0e1ae7d4"
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/launch.json b/harness/experiments/text-navigation-native-20260911/initial-trial/launch.json
new file mode 100644
index 00000000..72563e69
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/launch.json
@@ -0,0 +1,22 @@
+{
+  "atUtc": "2026-09-11T18:40:00.491880+00:00",
+  "pid": 6344,
+  "binarySha256": "df7126b8fc14c90985c2a0c55a640990f990e487d95a33f194aa7238754ceabd",
+  "buildReceiptSha256": "a90ff9d8e57ca235a884c7f88d1f85243c0ab35ba068c4eeb1c262ea04f028b6",
+  "source": "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\valid\\project.arcadia",
+  "environment": {
+    "SystemRoot": "C:\\Windows",
+    "SystemDrive": "C:",
+    "ProgramData": "C:\\ProgramData",
+    "ALLUSERSPROFILE": "C:\\ProgramData",
+    "PUBLIC": "C:\\Users\\Public",
+    "WINDIR": "C:\\Windows",
+    "PATH": "C:\\Windows\\System32;C:\\Windows",
+    "USERPROFILE": "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\profile",
+    "LOCALAPPDATA": "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\profile\\local",
+    "APPDATA": "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\profile\\roaming",
+    "TEMP": "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\tmp",
+    "TMP": "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\tmp"
+  },
+  "scope": "Identified local Windows GUI; native verification pending"
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/manifest.json b/harness/experiments/text-navigation-native-20260911/initial-trial/manifest.json
new file mode 100644
index 00000000..8d5e9737
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/manifest.json
@@ -0,0 +1,268 @@
+{
+  "atUtc": "2026-09-11T19:01:16.873579+00:00",
+  "sourceCommit": "36db9356cce3c7614ae37eec9fe17678ca210afe",
+  "binarySha256": "df7126b8fc14c90985c2a0c55a640990f990e487d95a33f194aa7238754ceabd",
+  "scope": "Initial native trial: useful behavior and four observed defects; not accepted for release. Large binary and private runtime profile excluded.",
+  "files": [
+    {
+      "path": "binary-after-close.json",
+      "bytes": 271,
+      "sha256": "ae7745f998d13231e9c9b5ccfaa941fa3b44fe1361d1a9b06ba5d67cf04b50fe"
+    },
+    {
+      "path": "binary-before.json",
+      "bytes": 182,
+      "sha256": "24a8adee983b64ee4e03f340c492da07f8e819995cbcdc7411c6117286a36411"
+    },
+    {
+      "path": "launch.json",
+      "bytes": 1307,
+      "sha256": "3d1efa4126aa4a4b12531bcb0b617c6b97f85be36c925d8e83696b45ad21d55f"
+    },
+    {
+      "path": "screenshots/01-home-0.png",
+      "bytes": 98258,
+      "sha256": "068a16e5895a532a4a4fe0ed535b355a0ada65ae4fe3c270895e3c9b6f5d9f6d"
+    },
+    {
+      "path": "screenshots/01-home.json",
+      "bytes": 435,
+      "sha256": "1c05e32c25262cdde425084019fee4fa660857969bf6e5e3ec744e082dd881b1"
+    },
+    {
+      "path": "screenshots/02-f12-unicode-definition-0.png",
+      "bytes": 117780,
+      "sha256": "452f9effdaa0c538ae46dd6dd35a7bf8225f52f56579ab34c9818a3e9a138f4f"
+    },
+    {
+      "path": "screenshots/02-f12-unicode-definition.json",
+      "bytes": 440,
+      "sha256": "f6862c8846564fac82be96ef90c515606ee7e0e784b8e81e25320d8885c092ad"
+    },
+    {
+      "path": "screenshots/03-references-exclude-prose-0.png",
+      "bytes": 123388,
+      "sha256": "d53354257a2f4ffa6a2127f80f5dd8b3020461ad41e8497d39697c35cb088835"
+    },
+    {
+      "path": "screenshots/03-references-exclude-prose.json",
+      "bytes": 440,
+      "sha256": "923f869f18f198f0424d7904ba5cac8e046e57fc0f46569bd854c42fd571e00e"
+    },
+    {
+      "path": "screenshots/04-back-original-reference-0.png",
+      "bytes": 123850,
+      "sha256": "4991890359c7c14a73d374bd245696087fca2f75d712e42486191c1e5037e291"
+    },
+    {
+      "path": "screenshots/04-back-original-reference.json",
+      "bytes": 440,
+      "sha256": "5d84bf855bcaf10cd2bab03b7663e2859c31b569e59b96a277391a413987b9b7"
+    },
+    {
+      "path": "screenshots/05-draft-disables-stale-results-0.png",
+      "bytes": 105544,
+      "sha256": "09dbc6eb9b618fc6378dc69644854bd189cea45d4d820765c5e026503b134907"
+    },
+    {
+      "path": "screenshots/05-draft-disables-stale-results.json",
+      "bytes": 442,
+      "sha256": "9c93165d7c24d4dcdfa2e857be701de207ac567955932750983702aced8af53b"
+    },
+    {
+      "path": "screenshots/06-draft-definition-needs-choice-0.png",
+      "bytes": 120864,
+      "sha256": "27139f47a89687ae6fe058c67fc817cf3297c28bd153ee9068b21e4c58c2587d"
+    },
+    {
+      "path": "screenshots/06-draft-definition-needs-choice.json",
+      "bytes": 442,
+      "sha256": "108da315a64a333c860e8a70cdba3e7f431ffe151884057b38574617abcdbae7"
+    },
+    {
+      "path": "screenshots/07-undo-restores-clean-source-0.png",
+      "bytes": 120688,
+      "sha256": "a9c3a775d3eacf15bc1175eee44801463bc3f987ea1465ce107e2b04f6f3e34f"
+    },
+    {
+      "path": "screenshots/07-undo-restores-clean-source.json",
+      "bytes": 440,
+      "sha256": "85365ed8246a34ab4f148a9ca7b5cc8c501341b115ff6e5c56b8b4450e01935c"
+    },
+    {
+      "path": "screenshots/08-minimum-window-find-and-results-0.png",
+      "bytes": 95980,
+      "sha256": "6bddbb03671c6094a1e1dae3290d4b2b8972f5f925d7b66baf76822efb91ad30"
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+      "path": "screenshots/08-minimum-window-find-and-results.json",
+      "bytes": 440,
+      "sha256": "1e3739e016ae9a174e468b0f007d8be422ed69ca103a079bcf6770fa572bd15d"
+    },
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+      "bytes": 85157,
+      "sha256": "500aeca274361fa4915e37224618502879d2847c318d11776bc14e9532ac6829"
+    },
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+      "path": "screenshots/09-escape-closes-find-and-results.json",
+      "bytes": 440,
+      "sha256": "dfabe22f3ba3477cc9844dd84432e5afcd391b4528b96ba68be26a64ad69d991"
+    },
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+      "bytes": 85246,
+      "sha256": "42be8debfb92b79dfebfaf1a598b3e2a7e152b7c98fafaf9420c1f5996394acc"
+    },
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+      "path": "screenshots/10-back-reopens-empty-panel-defect.json",
+      "bytes": 440,
+      "sha256": "c9988f78105196be5c137943c704c7e96bbae77d9209ef334a06ec505aac4172"
+    },
+    {
+      "path": "screenshots/11-find-only-first-escape-defect-0.png",
+      "bytes": 84468,
+      "sha256": "37f6b9a4c9c8dee4142393cc4d47dc2f76b7cd436d54375135dc0ae960f58b50"
+    },
+    {
+      "path": "screenshots/11-find-only-first-escape-defect.json",
+      "bytes": 440,
+      "sha256": "d52a4c09cc8ef68f293c1851b0c7cc4883b25b6f6a96337be178260135f79977"
+    },
+    {
+      "path": "screenshots/12-alt-space-clean-before-0.png",
+      "bytes": 85797,
+      "sha256": "3405a73d431d6c073f974852980c43fb6bc9dc75f8d3300fbf5e13220b36f539"
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+      "path": "screenshots/12-alt-space-clean-before.json",
+      "bytes": 440,
+      "sha256": "a9c56af99ee7354763f02e167de2ff35cfda65f1e0c8a3ad805c4daf8f06ab21"
+    },
+    {
+      "path": "screenshots/13-alt-space-escape-clean-counterevidence-0.png",
+      "bytes": 85748,
+      "sha256": "202b4cae90400a4ae75cdc76f9e41190ded783757d4f81df20dc9da1cabfb532"
+    },
+    {
+      "path": "screenshots/13-alt-space-escape-clean-counterevidence.json",
+      "bytes": 440,
+      "sha256": "79c7e54b27013b1a27b40c16ef669645310f84d2eabffebaeef18363938c597d"
+    },
+    {
+      "path": "screenshots/14-delayed-alt-space-insertion-0.png",
+      "bytes": 84841,
+      "sha256": "224c55d8655bbf5c69d39c1f95b9a979b1b7a63966564bf38cb6280d97131013"
+    },
+    {
+      "path": "screenshots/14-delayed-alt-space-insertion.json",
+      "bytes": 442,
+      "sha256": "20f001f366a6a60c395058269263de894539b3daf90fb897ca1e5c6639bfbc49"
+    },
+    {
+      "path": "screenshots/15-alt-space-neutral-click-inserts-space-0.png",
+      "bytes": 85017,
+      "sha256": "844e505184c11eaf4a922ad00a4543d07b53bac5ae0d0fe3383384a1e08cb75e"
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+      "sha256": "1efbd96186e9fdf9e1b465b2cc85e3402f12c581d1567cf66719866ddbc799e1"
+    },
+    {
+      "path": "screenshots/16-restored-all-source-files-saved-0.png",
+      "bytes": 83059,
+      "sha256": "7353641b19958e3307a7ebacacb573d6468aeefda4efc3458ee27ae8a26d3b86"
+    },
+    {
+      "path": "screenshots/16-restored-all-source-files-saved.json",
+      "bytes": 440,
+      "sha256": "6694ff247a08fa1ece78c89fe97621337b46a11c399e2f5428adb91501a0b335"
+    },
+    {
+      "path": "source-before.json",
+      "bytes": 5207,
+      "sha256": "b5170b4679603263eb2e282d4267d4f53af044ddf464a4663cd2038b1bc98768"
+    },
+    {
+      "path": "stderr.log",
+      "bytes": 0,
+      "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+    },
+    {
+      "path": "stdout.log",
+      "bytes": 0,
+      "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+    },
+    {
+      "path": "valid-navigation-final-saved-sources/links.arcadia",
+      "bytes": 211,
+      "sha256": "d3229ecf6300804103eb7f85bd5891c022f6f6c194dbdbbdcb54e9550338dc3b"
+    },
+    {
+      "path": "valid-navigation-final-saved-sources/project.arcadia",
+      "bytes": 277,
+      "sha256": "79e26836c048a35aaf98b21ff006ae8ac931160abd9913b9e67b542303215414"
+    },
+    {
+      "path": "valid-navigation-final-saved-sources/救援/assess.arcadia",
+      "bytes": 192,
+      "sha256": "d99593537e67b2dfd293623f467ffbd46af4ea259dffae55d1fe9995c86e6992"
+    },
+    {
+      "path": "valid-navigation-final-saved-sources/救援/confirm.arcadia",
+      "bytes": 92,
+      "sha256": "591b32db3b1282825750d002d9293cfc450d55252506623302ce36c949fe9919"
+    },
+    {
+      "path": "valid-navigation-final-saved.json",
+      "bytes": 1127,
+      "sha256": "0af9b2a7687efd68748a86e78afcf11192398d3eacd14968f499af2f8998d9da"
+    },
+    {
+      "path": "valid-navigation-final-saved.stderr.log",
+      "bytes": 0,
+      "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+    },
+    {
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+      "bytes": 86,
+      "sha256": "5ac622cfcc05242dca7c1368aba77293d42ab9ce5e56df7b2aedd2287d66d5e7"
+    },
+    {
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+      "bytes": 211,
+      "sha256": "d3229ecf6300804103eb7f85bd5891c022f6f6c194dbdbbdcb54e9550338dc3b"
+    },
+    {
+      "path": "valid-navigation-restored-sources/project.arcadia",
+      "bytes": 277,
+      "sha256": "79e26836c048a35aaf98b21ff006ae8ac931160abd9913b9e67b542303215414"
+    },
+    {
+      "path": "valid-navigation-restored-sources/救援/assess.arcadia",
+      "bytes": 192,
+      "sha256": "d99593537e67b2dfd293623f467ffbd46af4ea259dffae55d1fe9995c86e6992"
+    },
+    {
+      "path": "valid-navigation-restored-sources/救援/confirm.arcadia",
+      "bytes": 92,
+      "sha256": "591b32db3b1282825750d002d9293cfc450d55252506623302ce36c949fe9919"
+    },
+    {
+      "path": "valid-navigation-restored.json",
+      "bytes": 1124,
+      "sha256": "3cf6917971225533f1de2840c975b9cc4f80049630bf03575f983493598b72d9"
+    },
+    {
+      "path": "valid-navigation-restored.stderr.log",
+      "bytes": 0,
+      "sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+    },
+    {
+      "path": "valid-navigation-restored.stdout.log",
+      "bytes": 86,
+      "sha256": "5ac622cfcc05242dca7c1368aba77293d42ab9ce5e56df7b2aedd2287d66d5e7"
+    }
+  ]
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/01-home-0.png b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/01-home-0.png
new file mode 100644
index 00000000..a52cecbc
Binary files /dev/null and b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/01-home-0.png differ
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/01-home.json b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/01-home.json
new file mode 100644
index 00000000..e7c787b9
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/01-home.json
@@ -0,0 +1,18 @@
+{
+  "window": {
+    "app": "process:C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\bin\\arcadia-studio.exe",
+    "id": 12845816,
+    "title": "Untitled mission — Arcadia Studio"
+  },
+  "screenshots": [
+    {
+      "height": 932,
+      "id": "screenshot-0",
+      "originX": 189,
+      "originY": 182,
+      "width": 1442,
+      "zIndex": 0
+    }
+  ],
+  "atUtc": "2026-09-11T18:40:42.698Z"
+}
\ No newline at end of file
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/02-f12-unicode-definition-0.png b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/02-f12-unicode-definition-0.png
new file mode 100644
index 00000000..d9070761
Binary files /dev/null and b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/02-f12-unicode-definition-0.png differ
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/02-f12-unicode-definition.json b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/02-f12-unicode-definition.json
new file mode 100644
index 00000000..02309575
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/02-f12-unicode-definition.json
@@ -0,0 +1,18 @@
+{
+  "window": {
+    "app": "process:C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\bin\\arcadia-studio.exe",
+    "id": 12845816,
+    "title": "Navigation — 救援 — Arcadia Studio"
+  },
+  "screenshots": [
+    {
+      "height": 932,
+      "id": "screenshot-0",
+      "originX": 189,
+      "originY": 182,
+      "width": 1442,
+      "zIndex": 0
+    }
+  ],
+  "atUtc": "2026-09-11T18:48:45.262Z"
+}
\ No newline at end of file
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/03-references-exclude-prose-0.png b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/03-references-exclude-prose-0.png
new file mode 100644
index 00000000..9db2a2e9
Binary files /dev/null and b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/03-references-exclude-prose-0.png differ
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/03-references-exclude-prose.json b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/03-references-exclude-prose.json
new file mode 100644
index 00000000..8609406a
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/screenshots/03-references-exclude-prose.json
@@ -0,0 +1,18 @@
+{
+  "window": {
+    "app": "process:C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\bin\\arcadia-studio.exe",
+    "id": 12845816,
+    "title": "Navigation — 救援 — Arcadia Studio"
+  },
+  "screenshots": [
+    {
+      "height": 932,
+      "id": "screenshot-0",
+      "originX": 189,
+      "originY": 182,
+      "width": 1442,
+      "zIndex": 0
+    }
+  ],
+  "atUtc": "2026-09-11T18:48:55.739Z"
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+    "oa/participants.arcadia": "951764c14179f27c10e315acf2ea37d1fff54c77b8441e23addd239e8c715ce3",
+    "oa/types.arcadia": "9d0396fb82dd5733edd8d1cf52f968ca84906927c704f9cf0944a7fae215cf49",
+    "sa/capabilities.arcadia": "b6912fb3ece439912345fa71724acd462e716a1e5a88203a1058a5c3b2c20a4f",
+    "sa/model.arcadia": "d431509251acb859fbb98733b6d18add952495e10a78703fbe8f31e40bc083c4",
+    "sa/participants.arcadia": "780d2eb08b217b67b55febb3d34846f727b8ee9018df6c5741748647e36b2ff8",
+    "sa/types.arcadia": "101fc0fbd99f1101514aa7b6da4f8e535aae0bb94c9e2b9e7e6c151135b28660",
+    "views/diagram_oa_allocation_view.arcadia": "dfc0eb61e0e2aa5bda45524571fbfa3494f44ce19696f3e15e07438074a07bc7",
+    "views/diagram_sa_allocation_view.arcadia": "b78b43a26a82efb8fbd5374b09c329fa341f57b29f635d397b9ef8aede71d389",
+    "views/diagram_sa_capability_view.arcadia": "75e8dc9fb30f25d6f8fd3c6b595593ab4f98958a25798f961e336e0fac557649",
+    "views/diagram_sa_service_view.arcadia": "b08c84f3ea633e7c78dfdad3272f75415f6256cf3614b6d99bfd4f0269076c9b",
+    "views/diagram_sa_state_view.arcadia": "5f42f4c605e57b817d8400ed21f2b14bfc4e1592aebe941ff113767504c2b869",
+    "oa/activities/activity_oa_restore_work.arcadia": "83e73d0a013d5c3e1a4af0d9139ab0cfa362d25a846671fc2dac59181061a9d4",
+    "oa/behavior/process_oa_assessment_procedure.arcadia": "172c32c044ef4b5bc58a1f4635cc81f48dabb4014479b47dce7b25fedf2dbd0d",
+    "oa/behavior/process_oa_field_procedure.arcadia": "d2552dc5383e2e91cb302a790364e197f663c2edc013a2ab1978789825c9c324",
+    "oa/behavior/process_oa_response.arcadia": "cf86f46fa5c5d70592ef43f1bc1cb4d968efd8add384ba88036bef6b88aa4abc",
+    "oa/behavior/scenario_oa_conversation.arcadia": "b25be524e98a35ebac5e4481b7609c027b32baf9605e8097f807560f94a77ca6",
+    "oa/behavior/scenario_oa_full_scenario.arcadia": "00a1edf2c9707a0eb62ac070c2d02467874f2c9c1f273cc6ddb53d6d65999a1c",
+    "oa/behavior/state_machine_oa_monitor.arcadia": "447c9ad1359f4a31ecf975ad07c0b08d8e7e03191fb0858e2fc56f377b223cd5",
+    "sa/behavior/process_sa_assessment_procedure.arcadia": "73928ced61c06cbc08728d7956676a50fd4c05aa5b7f1ff4f29ce27a0b0f2088",
+    "sa/behavior/process_sa_field_procedure.arcadia": "886d462af83110cbfa55dd232a667ea1446761234471357cbb878794e98e8768",
+    "sa/behavior/process_sa_response.arcadia": "041785fc22842423822431bd5e6e8d16094ebd0716965e7c765fb8c1d7549e8a",
+    "sa/behavior/scenario_sa_conversation.arcadia": "97276f5757ee9aa12a0dbd9d3ccd58174b3091162bb8bcce357cec20a45f5d85",
+    "sa/behavior/scenario_sa_full_scenario.arcadia": "e12fc406b99d60a2f7768aaa0b25ba560e8605f0b8e37f3a7cdd3b8443562b74",
+    "sa/behavior/state_machine_sa_monitor.arcadia": "05ce29af99424c491c47fe2450dc6f5f8ce995511c01ec7e17bb5855be3c9736",
+    "sa/functions/function_sa_audit_thresholds.arcadia": "e5a04325d52183956dca814dd90f4e56c96c6b7db0f4f202f203ecb49c3e0f4f",
+    "sa/functions/function_sa_restore_work.arcadia": "fddeb67308051325041fee641fe758ddf43345b7c47b66d433616ad07fdccdd6"
+  },
+  "ambiguous": {
+    "links.arcadia": "d3229ecf6300804103eb7f85bd5891c022f6f6c194dbdbbdcb54e9550338dc3b",
+    "project.arcadia": "79e26836c048a35aaf98b21ff006ae8ac931160abd9913b9e67b542303215414",
+    "救援/assess.arcadia": "d99593537e67b2dfd293623f467ffbd46af4ea259dffae55d1fe9995c86e6992",
+    "救援/confirm.arcadia": "ba3e222bdc7dfa94e4f1b16df091447835da6b5bea8a72701e12e077e77319a6"
+  },
+  "missing-include": {
+    "links.arcadia": "d3229ecf6300804103eb7f85bd5891c022f6f6c194dbdbbdcb54e9550338dc3b",
+    "project.arcadia": "573357995f0a68fef39aa3eef3125e2271242d1ce01607c129624399b77e682e",
+    "救援/assess.arcadia": "d99593537e67b2dfd293623f467ffbd46af4ea259dffae55d1fe9995c86e6992",
+    "救援/confirm.arcadia": "591b32db3b1282825750d002d9293cfc450d55252506623302ce36c949fe9919"
+  }
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/stderr.log b/harness/experiments/text-navigation-native-20260911/initial-trial/stderr.log
new file mode 100644
index 00000000..e69de29b
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/stdout.log b/harness/experiments/text-navigation-native-20260911/initial-trial/stdout.log
new file mode 100644
index 00000000..e69de29b
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/links.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/links.arcadia
new file mode 100644
index 00000000..8f99a9d8
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/links.arcadia
@@ -0,0 +1,4 @@
+interaction handoff "Assessment handoff" id "9e8f0000-0000-4000-8000-000000000004" {
+    description "救援 @assess is prose"; source @assess; target @confirm;
+    // Another comment @assess is excluded.
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/project.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/project.arcadia
new file mode 100644
index 00000000..2771b2bf
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/project.arcadia
@@ -0,0 +1,7 @@
+arcadia 7;
+project navigation_trial "Navigation — 救援" id "9e8f0000-0000-4000-8000-000000000001" {
+    description "Prose @assess must not be a lexical use.";
+    include "救援/assess.arcadia";
+    include "救援/confirm.arcadia";
+    include "links.arcadia";
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/救援/assess.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/救援/assess.arcadia
new file mode 100644
index 00000000..2595a7db
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/救援/assess.arcadia
@@ -0,0 +1,4 @@
+// Comment @assess must not be a lexical use.
+oa_activity assess "Assess 救援 request" id "9e8f0000-0000-4000-8000-000000000002" {
+    description "Keep @assess as prose, not a use.";
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/救援/confirm.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/救援/confirm.arcadia
new file mode 100644
index 00000000..2d3ec804
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved-sources/救援/confirm.arcadia
@@ -0,0 +1 @@
+oa_activity confirm "Confirm 救援 response" id "9e8f0000-0000-4000-8000-000000000003" {}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.json b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.json
new file mode 100644
index 00000000..0111d60d
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.json
@@ -0,0 +1,19 @@
+{
+  "atUtc": "2026-09-11T18:59:40.985467+00:00",
+  "command": [
+    "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\staged-source-oracle-20260911\\staged-source-authoring-contract.exe",
+    "same",
+    "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911-preparation\\valid-baseline\\project.arcadia",
+    "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\valid-navigation-final-saved-sources\\project.arcadia"
+  ],
+  "exitCode": 0,
+  "oracleSha256": "967d9ba3c6fb3a7efb410833903ec94556ca2d48a67d5072c8bb160f40a00f9c",
+  "files": {
+    "links.arcadia": "d3229ecf6300804103eb7f85bd5891c022f6f6c194dbdbbdcb54e9550338dc3b",
+    "project.arcadia": "79e26836c048a35aaf98b21ff006ae8ac931160abd9913b9e67b542303215414",
+    "救援/assess.arcadia": "d99593537e67b2dfd293623f467ffbd46af4ea259dffae55d1fe9995c86e6992",
+    "救援/confirm.arcadia": "591b32db3b1282825750d002d9293cfc450d55252506623302ce36c949fe9919"
+  },
+  "binaryFilesUnchanged": true,
+  "scope": "Complete saved Project/identity, reachable sources and physical Arcadia equality"
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.stderr.log b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.stderr.log
new file mode 100644
index 00000000..e69de29b
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.stdout.log b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.stdout.log
new file mode 100644
index 00000000..dfcbc2b3
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-final-saved.stdout.log
@@ -0,0 +1 @@
+PASS exact model/identity/4 reachable sources; 4 exact disk files (0 proven retained)
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/links.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/links.arcadia
new file mode 100644
index 00000000..8f99a9d8
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/links.arcadia
@@ -0,0 +1,4 @@
+interaction handoff "Assessment handoff" id "9e8f0000-0000-4000-8000-000000000004" {
+    description "救援 @assess is prose"; source @assess; target @confirm;
+    // Another comment @assess is excluded.
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/project.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/project.arcadia
new file mode 100644
index 00000000..2771b2bf
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/project.arcadia
@@ -0,0 +1,7 @@
+arcadia 7;
+project navigation_trial "Navigation — 救援" id "9e8f0000-0000-4000-8000-000000000001" {
+    description "Prose @assess must not be a lexical use.";
+    include "救援/assess.arcadia";
+    include "救援/confirm.arcadia";
+    include "links.arcadia";
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/救援/assess.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/救援/assess.arcadia
new file mode 100644
index 00000000..2595a7db
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/救援/assess.arcadia
@@ -0,0 +1,4 @@
+// Comment @assess must not be a lexical use.
+oa_activity assess "Assess 救援 request" id "9e8f0000-0000-4000-8000-000000000002" {
+    description "Keep @assess as prose, not a use.";
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/救援/confirm.arcadia b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/救援/confirm.arcadia
new file mode 100644
index 00000000..2d3ec804
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored-sources/救援/confirm.arcadia
@@ -0,0 +1 @@
+oa_activity confirm "Confirm 救援 response" id "9e8f0000-0000-4000-8000-000000000003" {}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.json b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.json
new file mode 100644
index 00000000..5eedcb73
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.json
@@ -0,0 +1,19 @@
+{
+  "atUtc": "2026-09-11T18:57:05.407663+00:00",
+  "command": [
+    "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\staged-source-oracle-20260911\\staged-source-authoring-contract.exe",
+    "same",
+    "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911-preparation\\valid-baseline\\project.arcadia",
+    "C:\\Users\\User\\Documents\\Git\\ARCADIA-Studio\\.local\\text-navigation-native-20260911\\valid-navigation-restored-sources\\project.arcadia"
+  ],
+  "exitCode": 0,
+  "oracleSha256": "967d9ba3c6fb3a7efb410833903ec94556ca2d48a67d5072c8bb160f40a00f9c",
+  "files": {
+    "links.arcadia": "d3229ecf6300804103eb7f85bd5891c022f6f6c194dbdbbdcb54e9550338dc3b",
+    "project.arcadia": "79e26836c048a35aaf98b21ff006ae8ac931160abd9913b9e67b542303215414",
+    "救援/assess.arcadia": "d99593537e67b2dfd293623f467ffbd46af4ea259dffae55d1fe9995c86e6992",
+    "救援/confirm.arcadia": "591b32db3b1282825750d002d9293cfc450d55252506623302ce36c949fe9919"
+  },
+  "binaryFilesUnchanged": true,
+  "scope": "Complete saved Project/identity, reachable sources and physical Arcadia equality"
+}
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.stderr.log b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.stderr.log
new file mode 100644
index 00000000..e69de29b
diff --git a/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.stdout.log b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.stdout.log
new file mode 100644
index 00000000..dfcbc2b3
--- /dev/null
+++ b/harness/experiments/text-navigation-native-20260911/initial-trial/valid-navigation-restored.stdout.log
@@ -0,0 +1 @@
+PASS exact model/identity/4 reachable sources; 4 exact disk files (0 proven retained)
diff --git a/harness/release-text-navigation-integrated-20260911.md b/harness/release-text-navigation-integrated-20260911.md
index a8004a7e..1c05bf1d 100644
--- a/harness/release-text-navigation-integrated-20260911.md
+++ b/harness/release-text-navigation-integrated-20260911.md
@@ -109,6 +109,11 @@ core bytes remained unchanged. Do not promote the earlier run to Unicode evidenc
 
 ## Evidence and remaining acceptance
 
+The subsequent [initial native trial](release-text-navigation-native-initial-20260911.md)
+verified useful navigation and exact saved-source/model equality, but found four
+interaction defects. It is not accepted for release. Corrections and a matching
+new native evaluation are required; earlier build/test results keep their scope.
+
 - [Component and prepared fixture archive](experiments/text-navigation-components-20260911/README.md)
 - [Desktop gate archive](experiments/text-navigation-desktop-20260911/README.md)
 - [Escape follow-up gates and reviews](experiments/text-navigation-followup-20260911/README.md)
diff --git a/harness/release-text-navigation-native-initial-20260911.md b/harness/release-text-navigation-native-initial-20260911.md
new file mode 100644
index 00000000..cf226d3b
--- /dev/null
+++ b/harness/release-text-navigation-native-initial-20260911.md
@@ -0,0 +1,115 @@
+# Initial native navigation trial — 2026-09-11
+
+Codex-9e8r6t `/root`; [issue 6](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/6).
+**Not accepted for release:** the actual Windows trial found four interaction
+defects. Useful checks below retain their narrower scope. Corrections and a new
+identified native run are required; the published contextual preview is unchanged.
+
+## Identity and isolation
+
+Source is `36db9356cce3c7614ae37eec9fe17678ca210afe`, built from unchanged
+`inputs4`; [build evidence](experiments/text-navigation-native-20260911/build/README.md)
+and [integrated gate report](release-text-navigation-integrated-20260911.md).
+The pinned GUI SHA256 is
+`df7126b8fc14c90985c2a0c55a640990f990e487d95a33f194aa7238754ceabd`
+(113,197,056 bytes). It ran from the private `text-navigation-native-20260911`
+directory, PID 6344, launched at 18:40:00 UTC. Runtime DLL, profile, test copies
+and oracle were pinned by the existing native helper. No WSL, Linux or VPN
+operations occurred.
+
+The earlier shared-desktop queue was based on an unverified assumption. Peer
+filesystem evidence differed; local Computer inventory showed no other Studio.
+[Issue 5 comments 473–478](http://217.177.34.108:3000/sorokin.oleg.edu/ARCADIA-Studio/issues/5#issuecomment-473)
+record the correction and peers' independent inventories. Each helper saw only
+its own identified Studio. The trial touched only this returned application.
+
+The app was closed through its title-bar control after the final verified save.
+A fresh Computer inventory no longer contained Studio, and PID 6344 was absent.
+The final binary/DLL readback matched the prelaunch bytes. Stdout/stderr were
+preserved; there was no observed crash.
+
+## Observed behavior
+
+The four-file fixture uses UTF-8, CRLF, Unicode folder `救援`, stable UUIDs,
+one actual `@assess` reference, and five excluded comment/prose occurrences.
+
+| Action | Observed result | Screenshot |
+| --- | --- | --- |
+| F12 inside `links.arcadia`'s authored `@assess` | Opened `救援/assess.arcadia`, selected the alias at line 2, byte column 13 | 02 |
+| Shift+F12 from the declaration | One declaration and one authored use; comments/prose excluded | 03 |
+| Alt+Left | Returned to the originating file/caret | 04 |
+| Insert one comment character | Old rows became disabled and explicitly stale | 05 |
+| F12 in the changed draft | Stayed at origin; offered an explicit draft declaration choice | 06 |
+| Choose draft declaration, Back, Ctrl+Z | Reached the declaration, returned, then restored clean source without Apply | 07 |
+| F12 while Find owns focus | No source navigation | 08 sequence |
+| Minimum window, Find and results together | Actual outer size 1102×732, client 1100×700; source remained editable and tools scrollable | 08 |
+| Escape with Find and results open | Closed both | 09 |
+| Explicit Definition button | Reached and selected the same exact declaration | Native sequence before 10 |
+| Save all after undoing all trial edits | Status read “All source files saved”; full saved oracle passed | 16 |
+
+Navigation and draft choices did not implicitly Apply. Source Undo returned the
+fixture to its accepted baseline. This trial does not prove all focus races,
+ambiguous/missing-include repair, busy cancellation, or the larger engineering
+walkthrough; those remain for the corrected native run.
+
+## Defects and falsification
+
+1. **Diagnostics move the editor during typing.** One comment edit cleared
+   diagnostics immediately and moved the editor top from y518 to y393. Debounced
+   lint restored the rows before the next click, which consequently hit a
+   diagnostic and opened another file. No data was lost. Independent source review
+   confirmed count-dependent diagnostic height plus a max-height-only header.
+   Reserve the existing bounded, scrollable header height; keep stale diagnostics
+   cleared. Verify actual editor geometry remains constant across lint states.
+
+2. **Back reopens an empty panel after Close.** The explicit Definition action,
+   Close, then Back restored the origin but reserved a blank 300 px results column
+   (screenshot 10). Preserve a closed panel on successful Back without a notice;
+   useful refusal/change notices must remain visible.
+
+3. **Find alone needs two Escapes.** With results closed and Find focused, the
+   first Escape merely unfocused the field (screenshot 11); a second closed Find.
+   The captured-input bridge included symbols but omitted Find alone. Add Find
+   to that same bridge while preserving modal priority and route deduplication.
+   Returning focus to the editor must use existing guarded reveal behavior.
+
+4. **System-menu input can alter source later.** A clean focused comment caret,
+   Alt+Space, Escape, then a neutral header click inserted an ordinary space at the
+   original caret. Immediate captures after Escape, including one after a 1 s
+   wait, still looked clean; the next pointer input exposed the edit. The first
+   isolated result therefore appeared to falsify the suspicion (12–13), but the
+   settled sequence showed `is` becoming `i s` (14). A repeat with the caret after
+   `is` produced `is  excluded` after clicking a neutral header (15), without other
+   text entry. Native Size-menu trials had shown the same delayed dirtiness.
+   Exact Windows event payloads were not instrumented. Source review identified
+   Iced's printable Alt+Space fallback as a compatible cause. Test a narrowly
+   scoped Windows binding guard with ordinary Space and international-input
+   controls, then repeat this actual native sequence before claiming resolution.
+
+All these trial edits were undone. Existing clean snapshots and failed states are
+retained. Do not infer a successful action solely from the first captured frame
+after a native modal closes; observe the settled state before a dependent check.
+
+## Saved result and evidence
+
+The final `valid-navigation-final-saved` check ran after the visible successful
+Save all result. The pinned oracle reported exact equality of the complete model,
+identities, all four reachable source texts and all four physical Arcadia files.
+This checks more than selected aliases or reparsing. The earlier
+`valid-navigation-restored` check also compared disk bytes successfully, but it
+preceded a visibly settled successful save and is **not** save-action acceptance.
+
+[Raw trial archive](experiments/text-navigation-native-20260911/initial-trial/manifest.json):
+52 payload files, 1,603,662 bytes, manifest SHA256
+`22eb414ffb45cc68b2f57d9cf516be73c6c52815188839ad32d237eaee69bf0c`.
+It contains the launch and binary receipts, initial source hashes, screenshots
+with capture metadata, both exact source checkpoints, oracle commands/results and
+stdout/stderr. The large executable and private runtime profile are excluded;
+their pinned identity and build provenance remain linked above. Raw files were
+copied with exact byte readback and per-file SHA256s.
+
+Acceptance next: independent review of the bounded corrections; relevant mounted
+geometry/event tests and strict desktop Clippy; a matching preserved GUI; repeat
+the affected native flows, repair fixtures and realistic multi-file walkthrough;
+full saved-source/model comparison; then coordinate a versioned release. Current
+work ownership and timing remain in issue 6 rather than this historical report.