Record pinned Zulip acceptance and projection evidence

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a0e241-8285-7a63-8c0c-51c9cb824dc3

research/evolution/ledger.json

@@ -523,6 +523,41 @@
         "cost_usd": null
       },
       "supersedes": []
+    },
+    {
+      "id": "LEARN-0016",
+      "date": "2026-09-27",
+      "recording": "prospective",
+      "stream": "cross-stream",
+      "comparison_group": "CD-acceptance-projection-static-v1",
+      "protocol_ref": "research/evolution/cycles/2026-09-27-zulip-acceptance.md",
+      "question": "Does the six-question authority/projection aid distinguish local editable content, remote shared acceptance and subsequent projection in a pinned application?",
+      "previous_belief": "Scoped acceptance, projection location and delivery schedule are separate questions with compatibility constraints; a local display need not establish shared acceptance.",
+      "conclusion": "Corroborated in pinned Zulip content editing: conditional local Markdown echo precedes remote validation; locked optional content checks and server rendering precede save/event scheduling; HTTP and event application are distinct paths. Same displayed object can carry tentative content. No candidate or maturity change.",
+      "disposition": "corroboration",
+      "affected_patterns": [],
+      "evidence": [
+        "research/reviews/ZulipAcceptanceProjection.md",
+        "research/reviews/ZulipAcceptanceSources.json",
+        "research/evolution/cycles/2026-09-27-zulip-acceptance-effort.json"
+      ],
+      "remaining_uncertainty": [
+        "Ten selected source/test files from one existing Zulip family, no application/database/upstream test execution or full-contract recurrence.",
+        "Response/event ordering, lost response after acceptance and current-edit ownership need preregistered reproduction; no defect or safe-replay claim.",
+        "Six prospective groups are not a comparable trend; original human and milestone gates remain open."
+      ],
+      "reviewer": {
+        "name": "Codex",
+        "role": "author-model",
+        "independent_human": false
+      },
+      "effort": {
+        "research_minutes": 4.182,
+        "execution_minutes": 0.102,
+        "reported_tokens": null,
+        "cost_usd": null
+      },
+      "supersedes": []
     }
   ]
 }