merge: T72 drawer polish (deferred edits + first-meeting gate + witness flag editing)

chat/state/manual_edit.py

@@ -6,7 +6,7 @@ be reversed by emitting an inverse ``manual_edit`` later. This module
 applies the new value to the appropriate target table; the snapshot of
 ``prior_value`` is taken by the route handler before this fires.
 
-Phase 1 covers four target kinds:
+Phase 1 covers five target kinds:
 - ``edge_affinity`` and ``edge_trust`` — slider edits on a specific edge,
   clamped to 0..100.
 - ``memory_significance`` — dropdown edit, clamped to 0..3.
@@ -17,8 +17,18 @@ Phase 1 covers four target kinds:
   field. Driven by T27 from the classifier's ``relationship_summary``
   output combined with the prior summary.
 
-Other §6.4 editable fields (activity verb / attention / posture,
+T72.1 (Phase 2.5) adds one list-shaped edit:
-knowledge_facts list manipulation) are deferred to Phase 1.5.
+- ``edge_knowledge_fact`` — add/remove a single fact on an edge's
+  ``knowledge_json`` list. Payload carries an ``action`` of ``"add"`` or
+  ``"remove"`` and a ``fact`` string; remove matches the first occurrence
+  by string equality so the route handler doesn't have to track fact
+  indices across re-renders.
+
+T72.3 adds a per-flag witness toggle:
+- ``memory_witness`` — flip one of ``witness_you`` / ``witness_host`` /
+  ``witness_guest`` on a memory row. Payload's ``new_value`` is a dict
+  ``{"flag": "you"|"host"|"guest", "value": 0|1}`` and ``prior_value``
+  mirrors the same shape so an inverse edit can restore the flag.
 
 Pin toggles intentionally use the existing ``memory_pin_changed`` event
 (registered in :mod:`chat.state.memory`) rather than ``manual_edit`` so
@@ -27,11 +37,14 @@ the projection writes both ``pinned`` and ``auto_pinned`` atomically.
 
 from __future__ import annotations
 
+import json
 from sqlite3 import Connection
 
 from chat.eventlog.log import Event
 from chat.eventlog.projector import on
 
+_VALID_WITNESS_FLAGS = {"you", "host", "guest"}
+
 
 def _clamp(value: int, lo: int, hi: int) -> int:
     return max(lo, min(hi, value))
@@ -87,5 +100,43 @@ def _apply_manual_edit(conn: Connection, e: Event) -> None:
                 target_id["target_id"],
             ),
         )
+    elif kind == "edge_knowledge_fact":
+        # T72.1: add or remove a single fact on an edge's knowledge list.
+        # ``target_id`` is the {"source_id", "target_id"} edge pair;
+        # ``new_value`` carries ``{"action": "add"|"remove", "fact": str}``.
+        # Remove matches by string equality (first occurrence) so callers
+        # don't have to thread a fact_index through re-rendered drawers.
+        action = new_value["action"]
+        fact = str(new_value["fact"])
+        row = conn.execute(
+            "SELECT knowledge_json FROM edges "
+            "WHERE source_id = ? AND target_id = ?",
+            (target_id["source_id"], target_id["target_id"]),
+        ).fetchone()
+        if row is not None:
+            knowledge = json.loads(row[0])
+            if action == "add":
+                knowledge.append(fact)
+            elif action == "remove" and fact in knowledge:
+                knowledge.remove(fact)
+            conn.execute(
+                "UPDATE edges SET knowledge_json = ? "
+                "WHERE source_id = ? AND target_id = ?",
+                (
+                    json.dumps(knowledge),
+                    target_id["source_id"],
+                    target_id["target_id"],
+                ),
+            )
+    elif kind == "memory_witness":
+        # T72.3: toggle one of the three witness flags on a memory row.
+        # ``new_value`` is the dict ``{"flag", "value"}``; ``prior_value``
+        # mirrors the same shape so an inverse edit restores the flag.
+        flag = new_value["flag"]
+        if flag in _VALID_WITNESS_FLAGS:
+            conn.execute(
+                f"UPDATE memories SET witness_{flag} = ? WHERE id = ?",
+                (1 if int(new_value["value"]) else 0, int(target_id)),
+            )
     # Unknown target_kind: silently no-op for v1. Future kinds (activity
-    # fields, knowledge_facts list manipulation) extend the dispatch above.
+    # fields, etc.) extend the dispatch above.

chat/templates/_drawer.html

@@ -100,24 +100,71 @@
   <section class="drawer-section">
     <h3>Add guest</h3>
     {% if available_guests %}
-      <form class="inline-edit"
+      {% set first_guest_id = available_guests[0].id %}
+      {% set first_existing = existing_guest_edges.get(first_guest_id, False) %}
+      <form class="inline-edit add-guest-form"
             hx-post="/chats/{{ chat.id }}/drawer/guest/add"
             hx-target="#drawer" hx-swap="innerHTML">
         <label>
           Bot:
-          <select name="guest_bot_id" required>
+          <select name="guest_bot_id" required class="add-guest-select">
             {% for b in available_guests %}
-              <option value="{{ b.id }}">{{ b.name }}</option>
+              <option value="{{ b.id }}"
+                      data-existing-edge="{{ 'true' if existing_guest_edges.get(b.id) else 'false' }}">
+                {{ b.name }}{% if existing_guest_edges.get(b.id) %} (already met){% endif %}
+              </option>
             {% endfor %}
           </select>
         </label>
+        <p class="muted add-guest-existing-note"
+           {% if not first_existing %}hidden{% endif %}>
+          they already know each other (edge exists from a prior chat)
+        </p>
+        <label class="add-guest-reseed-label"
+               {% if not first_existing %}hidden{% endif %}>
+          <input type="checkbox" name="reseed" value="1" class="add-guest-reseed">
+          re-seed anyway
+        </label>
         <label>
           Have they met before? Describe how (leave blank if not):
           <textarea name="relationship_prose" rows="3"
+                    class="add-guest-prose"
+                    {% if first_existing %}disabled{% endif %}
                     placeholder="e.g. Old college friends who studied physics together."></textarea>
         </label>
         <button type="submit">Add guest</button>
       </form>
+      <script>
+        (function () {
+          var form = document.currentScript.previousElementSibling;
+          while (form && !form.classList.contains('add-guest-form')) {
+            form = form.previousElementSibling;
+          }
+          if (!form) return;
+          var sel = form.querySelector('.add-guest-select');
+          var prose = form.querySelector('.add-guest-prose');
+          var reseed = form.querySelector('.add-guest-reseed');
+          var note = form.querySelector('.add-guest-existing-note');
+          var reseedLabel = form.querySelector('.add-guest-reseed-label');
+          function refresh() {
+            var opt = sel.options[sel.selectedIndex];
+            var existing = opt && opt.getAttribute('data-existing-edge') === 'true';
+            if (existing) {
+              note.removeAttribute('hidden');
+              reseedLabel.removeAttribute('hidden');
+              prose.disabled = !reseed.checked;
+            } else {
+              note.setAttribute('hidden', '');
+              reseedLabel.setAttribute('hidden', '');
+              reseed.checked = false;
+              prose.disabled = false;
+            }
+          }
+          sel.addEventListener('change', refresh);
+          reseed.addEventListener('change', refresh);
+          refresh();
+        })();
+      </script>
     {% else %}
       <p class="muted">No other bots authored yet.</p>
     {% endif %}
@@ -156,19 +203,95 @@
           </label>
           <button type="submit">Save</button>
         </form>
-        {% if edge_b2y.summary %}<p class="muted">{{ edge_b2y.summary }}</p>{% endif %}
+        <form class="inline-edit"
-        {% if edge_b2y.knowledge %}
+              hx-post="/chats/{{ chat.id }}/drawer/edge/trust"
-          <details><summary>Knowledge ({{ edge_b2y.knowledge|length }})</summary>
+              hx-target="#drawer" hx-swap="innerHTML">
-            <ul>{% for fact in edge_b2y.knowledge %}<li>{{ fact }}</li>{% endfor %}</ul>
+          <input type="hidden" name="source_id" value="{{ host_bot.id }}">
-          </details>
+          <input type="hidden" name="target_id" value="you">
-        {% endif %}
+          <label>
+            Trust:
+            <input type="range" name="new_value" min="0" max="100"
+                   value="{{ edge_b2y.trust }}"
+                   oninput="this.nextElementSibling.value = this.value">
+            <output>{{ edge_b2y.trust }}</output>
+          </label>
+          <button type="submit">Save</button>
+        </form>
+        <form class="inline-edit"
+              hx-post="/chats/{{ chat.id }}/drawer/edge/summary"
+              hx-target="#drawer" hx-swap="innerHTML">
+          <input type="hidden" name="source_id" value="{{ host_bot.id }}">
+          <input type="hidden" name="target_id" value="you">
+          <label>
+            Summary:
+            <textarea name="new_summary" rows="3" maxlength="2000">{{ edge_b2y.summary or "" }}</textarea>
+          </label>
+          <button type="submit">Save summary</button>
+        </form>
+        <details>
+          <summary>Knowledge ({{ (edge_b2y.knowledge or [])|length }})</summary>
+          {% if edge_b2y.knowledge %}
+            <ul>
+              {% for fact in edge_b2y.knowledge %}
+                <li>
+                  {{ fact }}
+                  <form class="inline-edit"
+                        hx-post="/chats/{{ chat.id }}/drawer/edge/knowledge-facts"
+                        hx-target="#drawer" hx-swap="innerHTML">
+                    <input type="hidden" name="source_id" value="{{ host_bot.id }}">
+                    <input type="hidden" name="target_id" value="you">
+                    <input type="hidden" name="action" value="remove">
+                    <input type="hidden" name="fact" value="{{ fact }}">
+                    <button type="submit">Remove</button>
+                  </form>
+                </li>
+              {% endfor %}
+            </ul>
+          {% endif %}
+          <form class="inline-edit"
+                hx-post="/chats/{{ chat.id }}/drawer/edge/knowledge-facts"
+                hx-target="#drawer" hx-swap="innerHTML">
+            <input type="hidden" name="source_id" value="{{ host_bot.id }}">
+            <input type="hidden" name="target_id" value="you">
+            <input type="hidden" name="action" value="add">
+            <label>
+              Add fact:
+              <input type="text" name="fact" maxlength="500" required>
+            </label>
+            <button type="submit">Add</button>
+          </form>
+        </details>
       </div>
     {% endif %}
     {% if edge_y2b %}
       <div class="edge-row">
         <strong>you &rarr; {{ host_bot.name }}</strong>
         <p>Affinity: {{ edge_y2b.affinity }}/100 &middot; Trust: {{ edge_y2b.trust }}/100</p>
-        {% if edge_y2b.summary %}<p class="muted">{{ edge_y2b.summary }}</p>{% endif %}
+        <form class="inline-edit"
+              hx-post="/chats/{{ chat.id }}/drawer/edge/trust"
+              hx-target="#drawer" hx-swap="innerHTML">
+          <input type="hidden" name="source_id" value="you">
+          <input type="hidden" name="target_id" value="{{ host_bot.id }}">
+          <label>
+            Trust:
+            <input type="range" name="new_value" min="0" max="100"
+                   value="{{ edge_y2b.trust }}"
+                   oninput="this.nextElementSibling.value = this.value">
+            <output>{{ edge_y2b.trust }}</output>
+          </label>
+          <button type="submit">Save</button>
+        </form>
+        <form class="inline-edit"
+              hx-post="/chats/{{ chat.id }}/drawer/edge/summary"
+              hx-target="#drawer" hx-swap="innerHTML">
+          <input type="hidden" name="source_id" value="you">
+          <input type="hidden" name="target_id" value="{{ host_bot.id }}">
+          <label>
+            Summary:
+            <textarea name="new_summary" rows="3" maxlength="2000">{{ edge_y2b.summary or "" }}</textarea>
+          </label>
+          <button type="submit">Save summary</button>
+        </form>
       </div>
     {% endif %}
     {% if not edge_b2y and not edge_y2b %}
@@ -224,6 +347,33 @@
               <input type="hidden" name="pinned" value="{{ 0 if m.pinned else 1 }}">
               <button type="submit">{{ 'Unpin' if m.pinned else 'Pin' }}</button>
             </form>
+            <div class="witness-row">
+              {% for flag in ['you', 'host', 'guest'] %}
+                {% set witnessed = m['witness_' ~ flag] %}
+                <form class="inline-edit"
+                      hx-post="/chats/{{ chat.id }}/drawer/memory/witness"
+                      hx-target="#drawer" hx-swap="innerHTML">
+                  <input type="hidden" name="memory_id" value="{{ m.id }}">
+                  <input type="hidden" name="flag" value="{{ flag }}">
+                  <input type="hidden" name="new_value" value="{{ 0 if witnessed else 1 }}">
+                  <label>
+                    <input type="checkbox" {% if witnessed %}checked{% endif %}
+                           onchange="this.form.requestSubmit()">
+                    {{ flag }}
+                  </label>
+                </form>
+              {% endfor %}
+            </div>
+            <details>
+              <summary>Edit POV summary</summary>
+              <form class="inline-edit"
+                    hx-post="/chats/{{ chat.id }}/drawer/memory/pov-summary"
+                    hx-target="#drawer" hx-swap="innerHTML">
+                <input type="hidden" name="memory_id" value="{{ m.id }}">
+                <textarea name="new_summary" rows="3" maxlength="2000">{{ m.pov_summary }}</textarea>
+                <button type="submit">Save</button>
+              </form>
+            </details>
           </li>
         {% endfor %}
       </ul>

chat/web/drawer.py

@@ -1,4 +1,4 @@
-"""Chat drawer — read view (T24) and inline edits (T25).
+"""Chat drawer — read view (T24) and inline edits (T25, T72).
 
 The GET endpoint renders an HTML partial showing the current scene +
 container, per-entity activity, host <-> you edges, pinned memories with
@@ -13,14 +13,16 @@ returning the refreshed drawer partial so HTMX can swap it in:
 * pin toggle on a memory (emits ``memory_pin_changed`` with
   ``auto_pinned=0`` so a manual pin is not subject to auto-eviction).
 
+T72 (Phase 2.5) extends the inline-edit set to cover the remaining
+§6.4 editable fields whose state-layer support already lands in the
+``manual_edit`` projector: edge trust slider, edge summary textarea,
+memory POV summary textarea, and per-edge knowledge-fact add/remove. It
+also exposes a witness-flag toggle (``you/host/guest``) per memory row
+and a "first-meeting gate" on the Add-guest form so an existing edge
+isn't quietly overwritten by a re-seed.
+
 Each ``manual_edit`` payload snapshots the prior value alongside the new
 one so a later inverse edit can restore state (§6.4 final paragraph).
-
-Other §6.4 editable fields (activity verb/attention/posture, edge_trust,
-edge summary, knowledge_facts list, memory pov_summary) are deferred to
-a Phase 1.5 follow-up — the dispatch in :mod:`chat.state.manual_edit`
-already accepts more ``target_kind`` values, so adding their routes is a
-mechanical extension.
 """
 
 from __future__ import annotations
@@ -55,6 +57,13 @@ PIN_CAP = 8
 # Recent-memories list is bounded to keep the drawer cheap to render.
 RECENT_LIMIT = 10
 
+# T72.1 caps on free-form textarea edits. Edge summaries and per-POV
+# memory summaries are drawer-driven prose — bound them so a stray paste
+# can't blow up the projected row size or the SSE drawer refresh payload.
+EDGE_SUMMARY_MAX = 2000
+MEMORY_POV_SUMMARY_MAX = 2000
+KNOWLEDGE_FACT_MAX = 500
+
 
 @router.get("/chats/{chat_id}/drawer", response_class=HTMLResponse)
 async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
@@ -104,14 +113,25 @@ async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
         available_guests = [
             b for b in list_bots(conn) if b["id"] != chat["host_bot_id"]
         ]
+    # T72.2 first-meeting gate: pre-compute whether a host->candidate edge
+    # already exists. Template renders the prose textarea disabled and the
+    # POST handler skips ``seed_inter_bot_edges`` (preserving the existing
+    # edge content) unless the user explicitly toggles "re-seed anyway".
+    existing_guest_edges = {
+        b["id"]: get_edge(conn, chat["host_bot_id"], b["id"]) is not None
+        for b in available_guests
+    }
     group_node = get_group_node(conn, chat_id)
 
     # Recent memories from host's POV (witness_host = 1), most recent first.
     # Raw query keeps this read self-contained — no projector helper exposes
-    # "latest N for an owner" yet and the drawer is the only consumer.
+    # "latest N for an owner" yet and the drawer is the only consumer. The
+    # three witness flags ride along so T72.3's per-row checkboxes can
+    # render the current state without a second query per memory.
     recent_rows = conn.execute(
         """
-        SELECT id, pov_summary, significance, pinned, created_at
+        SELECT id, pov_summary, significance, pinned, created_at,
+               witness_you, witness_host, witness_guest
         FROM memories
         WHERE owner_id = ? AND witness_host = 1
         ORDER BY id DESC
@@ -126,6 +146,9 @@ async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
             "significance": r[2],
             "pinned": r[3],
             "created_at": r[4],
+            "witness_you": r[5],
+            "witness_host": r[6],
+            "witness_guest": r[7],
         }
         for r in recent_rows
     ]
@@ -152,6 +175,7 @@ async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
             "edge_y2g": edge_y2g,
             "edge_g2y": edge_g2y,
             "available_guests": available_guests,
+            "existing_guest_edges": existing_guest_edges,
             "group_node": group_node,
             "recent_memories": recent_memories,
             "pinned": pinned,
@@ -342,6 +366,281 @@ async def toggle_memory_pin(
     return await drawer(chat_id, request, conn)
 
 
+# --- T72.1 deferred v1 drawer edits --------------------------------------
+#
+# These four endpoints round out the §6.4 editable surface — the
+# ``manual_edit`` projector already dispatches ``edge_trust``,
+# ``edge_summary``, and ``memory_pov_summary`` (T25); ``edge_knowledge_fact``
+# is a new dispatch branch added alongside this commit. Each route follows
+# the T25 pattern: snapshot the prior value, append + apply ``manual_edit``,
+# then re-render the drawer partial.
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/edge/trust",
+    response_class=HTMLResponse,
+)
+async def edit_edge_trust(
+    chat_id: str,
+    request: Request,
+    source_id: str = Form(...),
+    target_id: str = Form(...),
+    new_value: int = Form(...),
+    conn=Depends(get_conn),
+):
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if not 0 <= int(new_value) <= 100:
+        raise HTTPException(
+            status_code=400,
+            detail=f"trust must be in [0, 100], got {new_value}",
+        )
+
+    edge = get_edge(conn, source_id, target_id)
+    if edge is None:
+        raise HTTPException(
+            status_code=404,
+            detail=f"edge not found: {source_id}->{target_id}",
+        )
+
+    prior = int(edge["trust"])
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "edge_trust",
+            "target_id": {"source_id": source_id, "target_id": target_id},
+            "prior_value": prior,
+            "new_value": int(new_value),
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/edge/summary",
+    response_class=HTMLResponse,
+)
+async def edit_edge_summary(
+    chat_id: str,
+    request: Request,
+    source_id: str = Form(...),
+    target_id: str = Form(...),
+    new_summary: str = Form(...),
+    conn=Depends(get_conn),
+):
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if len(new_summary) > EDGE_SUMMARY_MAX:
+        raise HTTPException(
+            status_code=400,
+            detail=(
+                f"edge summary exceeds {EDGE_SUMMARY_MAX} chars "
+                f"(got {len(new_summary)})"
+            ),
+        )
+
+    edge = get_edge(conn, source_id, target_id)
+    if edge is None:
+        raise HTTPException(
+            status_code=404,
+            detail=f"edge not found: {source_id}->{target_id}",
+        )
+
+    prior = edge.get("summary") or ""
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "edge_summary",
+            "target_id": {"source_id": source_id, "target_id": target_id},
+            "prior_value": prior,
+            "new_value": new_summary,
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/memory/pov-summary",
+    response_class=HTMLResponse,
+)
+async def edit_memory_pov_summary(
+    chat_id: str,
+    request: Request,
+    memory_id: int = Form(...),
+    new_summary: str = Form(...),
+    conn=Depends(get_conn),
+):
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if len(new_summary) > MEMORY_POV_SUMMARY_MAX:
+        raise HTTPException(
+            status_code=400,
+            detail=(
+                f"memory pov_summary exceeds {MEMORY_POV_SUMMARY_MAX} chars "
+                f"(got {len(new_summary)})"
+            ),
+        )
+
+    # 404 when the memory either doesn't exist or belongs to a different
+    # chat — the drawer never surfaces cross-chat memories so editing one
+    # would be a path-traversal-style mistake.
+    row = conn.execute(
+        "SELECT pov_summary FROM memories WHERE id = ? AND chat_id = ?",
+        (int(memory_id), chat_id),
+    ).fetchone()
+    if row is None:
+        raise HTTPException(
+            status_code=404,
+            detail=f"memory not found in chat: {memory_id}",
+        )
+
+    prior = row[0] or ""
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "memory_pov_summary",
+            "target_id": int(memory_id),
+            "prior_value": prior,
+            "new_value": new_summary,
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/edge/knowledge-facts",
+    response_class=HTMLResponse,
+)
+async def edit_edge_knowledge_facts(
+    chat_id: str,
+    request: Request,
+    source_id: str = Form(...),
+    target_id: str = Form(...),
+    action: str = Form(...),
+    fact: str = Form(...),
+    conn=Depends(get_conn),
+):
+    """Add or remove a single knowledge_fact on an edge.
+
+    Remove semantics are by string match (first occurrence) — the drawer
+    re-renders after every edit so threading a stable index through is
+    fragile when concurrent ``edge_update`` events can append more facts
+    between renders. The projector is a no-op when the fact isn't found,
+    keeping the route idempotent for stale form submissions.
+    """
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if action not in ("add", "remove"):
+        raise HTTPException(
+            status_code=400,
+            detail=f"action must be 'add' or 'remove', got {action!r}",
+        )
+
+    if len(fact) > KNOWLEDGE_FACT_MAX:
+        raise HTTPException(
+            status_code=400,
+            detail=(
+                f"fact exceeds {KNOWLEDGE_FACT_MAX} chars (got {len(fact)})"
+            ),
+        )
+    if not fact.strip():
+        raise HTTPException(status_code=400, detail="fact must not be empty")
+
+    edge = get_edge(conn, source_id, target_id)
+    if edge is None:
+        raise HTTPException(
+            status_code=404,
+            detail=f"edge not found: {source_id}->{target_id}",
+        )
+
+    prior = list(edge.get("knowledge") or [])
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "edge_knowledge_fact",
+            "target_id": {"source_id": source_id, "target_id": target_id},
+            "prior_value": prior,
+            "new_value": {"action": action, "fact": fact},
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
+# --- T72.3 witness flag inline-edit --------------------------------------
+#
+# Witness flags decide which entities can recall a memory (§7 retrieval).
+# Editing them is rare but high-impact — flipping ``witness_guest`` from 0
+# to 1 makes the memory available to the guest's prompt context. The route
+# follows the T25 / T72.1 pattern: snapshot prior, append + apply
+# ``manual_edit`` with a ``{flag, value}`` payload, refresh the partial.
+
+
+_VALID_WITNESS_FLAGS = ("you", "host", "guest")
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/memory/witness",
+    response_class=HTMLResponse,
+)
+async def edit_memory_witness(
+    chat_id: str,
+    request: Request,
+    memory_id: int = Form(...),
+    flag: str = Form(...),
+    new_value: int = Form(...),
+    conn=Depends(get_conn),
+):
+    chat = get_chat(conn, chat_id)
+    if chat is None:
+        raise HTTPException(status_code=404, detail=f"chat not found: {chat_id}")
+
+    if flag not in _VALID_WITNESS_FLAGS:
+        raise HTTPException(
+            status_code=400,
+            detail=(
+                f"flag must be one of {list(_VALID_WITNESS_FLAGS)}, "
+                f"got {flag!r}"
+            ),
+        )
+
+    row = conn.execute(
+        f"SELECT witness_{flag} FROM memories "
+        "WHERE id = ? AND chat_id = ?",
+        (int(memory_id), chat_id),
+    ).fetchone()
+    if row is None:
+        raise HTTPException(
+            status_code=404,
+            detail=f"memory not found in chat: {memory_id}",
+        )
+
+    prior_int = int(row[0])
+    new_int = 1 if int(new_value) else 0
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "memory_witness",
+            "target_id": int(memory_id),
+            "prior_value": {"flag": flag, "value": prior_int},
+            "new_value": {"flag": flag, "value": new_int},
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
 # --- T42 guest add/remove -------------------------------------------------
 #
 # Adding a guest fans out into up to four events: a ``guest_added`` to flip
@@ -381,6 +680,7 @@ async def add_guest(
     request: Request,
     guest_bot_id: str = Form(...),
     relationship_prose: str = Form(""),
+    reseed: str = Form(""),
     conn=Depends(get_conn),
     client=Depends(get_llm_client),
 ):
@@ -412,17 +712,32 @@ async def add_guest(
             detail=f"host bot not found: {chat['host_bot_id']}",
         )
 
-    settings = request.app.state.settings
+    # T72.2 first-meeting gate: when an edge already exists from a prior
-    seed = await seed_inter_bot_edges(
+    # chat, the textarea is rendered disabled. Submission without the
-        client,
+    # explicit "re-seed anyway" toggle skips ``seed_inter_bot_edges``
-        classifier_model=settings.classifier_model,
+    # entirely so the existing edge content (affinity, trust, knowledge,
-        bot_a_id=chat["host_bot_id"],
+    # summaries) survives. ``guest_added`` and ``group_node_initialized``
-        bot_a_name=host_bot["name"],
+    # still fire so the chat picks up the new participant.
-        bot_b_id=guest_bot_id,
+    existing_edge = (
-        bot_b_name=guest_bot["name"],
+        get_edge(conn, chat["host_bot_id"], guest_bot_id) is not None
-        relationship_prose=relationship_prose,
-        timeout_s=settings.classifier_timeout_s,
     )
+    reseed_requested = reseed.lower() in ("1", "true", "on", "yes")
+    skip_seed = existing_edge and not reseed_requested
+
+    settings = request.app.state.settings
+    if skip_seed:
+        seed = None
+    else:
+        seed = await seed_inter_bot_edges(
+            client,
+            classifier_model=settings.classifier_model,
+            bot_a_id=chat["host_bot_id"],
+            bot_a_name=host_bot["name"],
+            bot_b_id=guest_bot_id,
+            bot_b_name=guest_bot["name"],
+            relationship_prose=relationship_prose,
+            timeout_s=settings.classifier_timeout_s,
+        )
 
     append_and_apply(
         conn,
@@ -437,7 +752,7 @@ async def add_guest(
     # per-direction summary is set via the per-pov scene-close path
     # (T27), not direct edge_update. We therefore drop seed.*_summary
     # here; the deltas + knowledge_facts are what materializes.
-    if not _seed_is_default(seed):
+    if seed is not None and not _seed_is_default(seed):
         append_and_apply(
             conn,
             kind="edge_update",

tests/test_drawer_edits_extended.py

@@ -0,0 +1,403 @@
+"""T72: deferred v1 drawer edits + witness flag inline-edit.
+
+T25 shipped affinity / significance / pin. T72.1 fills in the rest of the
+§6.4 editable surface whose ``manual_edit`` projector dispatch was already
+in place (or, for ``edge_knowledge_fact``, added alongside the route):
+
+* ``POST /chats/{chat_id}/drawer/edge/trust`` — slider 0..100.
+* ``POST /chats/{chat_id}/drawer/edge/summary`` — textarea, capped 2000.
+* ``POST /chats/{chat_id}/drawer/memory/pov-summary`` — textarea, capped.
+* ``POST /chats/{chat_id}/drawer/edge/knowledge-facts`` — add/remove fact.
+
+T72.3 layers a witness-flag toggle on top:
+
+* ``POST /chats/{chat_id}/drawer/memory/witness`` — ``manual_edit`` with
+  ``target_kind`` = ``memory_witness`` and a ``{flag, value}`` payload.
+
+Each test asserts (a) the ``manual_edit`` event lands in the log,
+(b) the projected table reflects the new value, and (c) the response is
+the refreshed drawer partial.
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+from fastapi.testclient import TestClient
+
+from chat.app import app
+from chat.db.connection import open_db
+from chat.eventlog.log import append_event
+from chat.eventlog.projector import project
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    cfg = tmp_path / "config.toml"
+    cfg.write_text('featherless_api_key = "test"\n')
+    monkeypatch.setenv("CHAT_CONFIG_PATH", str(cfg))
+    db = tmp_path / "test.db"
+    monkeypatch.setenv("CHAT_DB_PATH", str(db))
+    with TestClient(app) as c:
+        if hasattr(app.state, "background_worker"):
+            app.state.background_worker.enabled = False
+        yield c
+
+
+def _seed(db: Path) -> None:
+    """Seed a chat with one host bot, one host->you edge with a fact and
+    summary already set, and one memory authored by ``bot_a`` witnessed by
+    all three roles. Tests reach into projected state to verify edits.
+    """
+    with open_db(db) as conn:
+        append_event(
+            conn,
+            kind="bot_authored",
+            payload={
+                "id": "bot_a",
+                "name": "BotA",
+                "persona": "...",
+                "voice_samples": [],
+                "traits": [],
+                "backstory": "",
+                "initial_relationship_to_you": "",
+                "kickoff_prose": "",
+            },
+        )
+        append_event(
+            conn,
+            kind="chat_created",
+            payload={
+                "id": "chat_bot_a",
+                "host_bot_id": "bot_a",
+                "initial_time": "2026-04-26T20:00:00+00:00",
+                "narrative_anchor": "Day 1",
+                "weather": "",
+            },
+        )
+        # Materialise edge bot_a -> you with a knowledge_fact already on it
+        # so the remove path has something to consume.
+        append_event(
+            conn,
+            kind="edge_update",
+            payload={
+                "source_id": "bot_a",
+                "target_id": "you",
+                "chat_id": "chat_bot_a",
+                "affinity_delta": 0,
+                "knowledge_facts": ["studied physics together"],
+            },
+        )
+        append_event(
+            conn,
+            kind="memory_written",
+            payload={
+                "owner_id": "bot_a",
+                "chat_id": "chat_bot_a",
+                "pov_summary": "Original summary text.",
+                "witness_you": 1,
+                "witness_host": 1,
+                "witness_guest": 0,
+                "significance": 1,
+            },
+        )
+        project(conn)
+
+
+# --- T72.1 tests ----------------------------------------------------------
+
+
+def test_edit_edge_trust_emits_manual_edit_and_updates(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/trust",
+        data={"source_id": "bot_a", "target_id": "you", "new_value": "73"},
+    )
+    assert response.status_code == 200
+    # Refresh shows the new trust value somewhere in the partial.
+    assert "73" in response.text
+
+    with open_db(tmp_path / "test.db") as conn:
+        rows = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(rows) == 1
+        payload = json.loads(rows[0][0])
+        assert payload["target_kind"] == "edge_trust"
+        assert payload["prior_value"] == 50
+        assert payload["new_value"] == 73
+        assert payload["target_id"] == {
+            "source_id": "bot_a",
+            "target_id": "you",
+        }
+
+        from chat.state.edges import get_edge
+
+        edge = get_edge(conn, "bot_a", "you")
+        assert edge["trust"] == 73
+
+
+def test_edit_edge_trust_400_on_out_of_range(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/trust",
+        data={"source_id": "bot_a", "target_id": "you", "new_value": "150"},
+    )
+    assert response.status_code == 400
+
+
+def test_edit_edge_summary_emits_manual_edit_and_updates(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/summary",
+        data={
+            "source_id": "bot_a",
+            "target_id": "you",
+            "new_summary": "BotA respects you and shares lab notes.",
+        },
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        rows = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(rows) == 1
+        payload = json.loads(rows[0][0])
+        assert payload["target_kind"] == "edge_summary"
+        assert payload["new_value"].startswith("BotA respects")
+        assert payload["target_id"] == {
+            "source_id": "bot_a",
+            "target_id": "you",
+        }
+
+        summary = conn.execute(
+            "SELECT summary FROM edges "
+            "WHERE source_id = ? AND target_id = ?",
+            ("bot_a", "you"),
+        ).fetchone()[0]
+        assert "respects" in summary
+
+    # And the refreshed partial echoes the new summary back.
+    assert "respects" in response.text
+
+
+def test_edit_edge_summary_400_on_overflow(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/summary",
+        data={
+            "source_id": "bot_a",
+            "target_id": "you",
+            "new_summary": "x" * 2001,
+        },
+    )
+    assert response.status_code == 400
+
+
+def test_edit_memory_pov_summary_emits_manual_edit_and_updates(
+    client, tmp_path
+):
+    _seed(tmp_path / "test.db")
+    with open_db(tmp_path / "test.db") as conn:
+        memory_id = conn.execute("SELECT id FROM memories LIMIT 1").fetchone()[0]
+
+    response = client.post(
+        "/chats/chat_bot_a/drawer/memory/pov-summary",
+        data={
+            "memory_id": str(memory_id),
+            "new_summary": "Cleaner per-POV restatement of the moment.",
+        },
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        rows = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(rows) == 1
+        payload = json.loads(rows[0][0])
+        assert payload["target_kind"] == "memory_pov_summary"
+        assert payload["prior_value"] == "Original summary text."
+        assert payload["new_value"].startswith("Cleaner per-POV")
+        assert payload["target_id"] == memory_id
+
+        pov = conn.execute(
+            "SELECT pov_summary FROM memories WHERE id = ?", (memory_id,)
+        ).fetchone()[0]
+        assert pov.startswith("Cleaner per-POV")
+
+    assert "Cleaner per-POV" in response.text
+
+
+def test_edit_memory_pov_summary_404_when_wrong_chat(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    with open_db(tmp_path / "test.db") as conn:
+        memory_id = conn.execute("SELECT id FROM memories LIMIT 1").fetchone()[0]
+        # Re-home the memory to a different chat to confirm the route's
+        # cross-chat guard fires.
+        conn.execute(
+            "UPDATE memories SET chat_id = 'other_chat' WHERE id = ?",
+            (memory_id,),
+        )
+        conn.commit()
+
+    response = client.post(
+        "/chats/chat_bot_a/drawer/memory/pov-summary",
+        data={"memory_id": str(memory_id), "new_summary": "..."},
+    )
+    assert response.status_code == 404
+
+
+def test_edit_edge_knowledge_facts_add_emits_event_and_appends(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/knowledge-facts",
+        data={
+            "source_id": "bot_a",
+            "target_id": "you",
+            "action": "add",
+            "fact": "lent you a textbook",
+        },
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        rows = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(rows) == 1
+        payload = json.loads(rows[0][0])
+        assert payload["target_kind"] == "edge_knowledge_fact"
+        assert payload["new_value"] == {
+            "action": "add",
+            "fact": "lent you a textbook",
+        }
+        # Prior value snapshots the entire knowledge list before the edit.
+        assert payload["prior_value"] == ["studied physics together"]
+
+        from chat.state.edges import get_edge
+
+        edge = get_edge(conn, "bot_a", "you")
+        assert "lent you a textbook" in edge["knowledge"]
+        assert "studied physics together" in edge["knowledge"]
+
+    assert "lent you a textbook" in response.text
+
+
+def test_edit_edge_knowledge_facts_remove_drops_matching_fact(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/knowledge-facts",
+        data={
+            "source_id": "bot_a",
+            "target_id": "you",
+            "action": "remove",
+            "fact": "studied physics together",
+        },
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        from chat.state.edges import get_edge
+
+        edge = get_edge(conn, "bot_a", "you")
+        assert "studied physics together" not in edge["knowledge"]
+
+        rows = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        payload = json.loads(rows[0][0])
+        assert payload["target_kind"] == "edge_knowledge_fact"
+        assert payload["new_value"]["action"] == "remove"
+
+
+def test_edit_edge_knowledge_facts_400_on_bad_action(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/knowledge-facts",
+        data={
+            "source_id": "bot_a",
+            "target_id": "you",
+            "action": "delete",
+            "fact": "x",
+        },
+    )
+    assert response.status_code == 400
+
+
+# --- T72.3 tests (witness flag inline-edit) -------------------------------
+
+
+def test_witness_flag_toggle_updates_memory_row(client, tmp_path):
+    """Memory seeded with witness [you=1, host=1, guest=0]; toggling
+    ``guest`` to 1 lands as ``witness_guest = 1`` after projection.
+    """
+    _seed(tmp_path / "test.db")
+    with open_db(tmp_path / "test.db") as conn:
+        memory_id = conn.execute("SELECT id FROM memories LIMIT 1").fetchone()[0]
+
+    response = client.post(
+        "/chats/chat_bot_a/drawer/memory/witness",
+        data={
+            "memory_id": str(memory_id),
+            "flag": "guest",
+            "new_value": "1",
+        },
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        row = conn.execute(
+            "SELECT witness_you, witness_host, witness_guest "
+            "FROM memories WHERE id = ?",
+            (memory_id,),
+        ).fetchone()
+        assert row == (1, 1, 1)
+
+
+def test_witness_flag_toggle_emits_manual_edit_event(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    with open_db(tmp_path / "test.db") as conn:
+        memory_id = conn.execute("SELECT id FROM memories LIMIT 1").fetchone()[0]
+
+    response = client.post(
+        "/chats/chat_bot_a/drawer/memory/witness",
+        data={
+            "memory_id": str(memory_id),
+            "flag": "guest",
+            "new_value": "1",
+        },
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        rows = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(rows) == 1
+        payload = json.loads(rows[0][0])
+        assert payload["target_kind"] == "memory_witness"
+        assert payload["target_id"] == memory_id
+        assert payload["prior_value"] == {"flag": "guest", "value": 0}
+        assert payload["new_value"] == {"flag": "guest", "value": 1}
+
+
+def test_witness_flag_toggle_400_on_bad_flag(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    with open_db(tmp_path / "test.db") as conn:
+        memory_id = conn.execute("SELECT id FROM memories LIMIT 1").fetchone()[0]
+
+    response = client.post(
+        "/chats/chat_bot_a/drawer/memory/witness",
+        data={
+            "memory_id": str(memory_id),
+            "flag": "narrator",
+            "new_value": "1",
+        },
+    )
+    assert response.status_code == 400
+
+

tests/test_drawer_guest.py

@@ -265,6 +265,162 @@ def test_drawer_remove_guest_clears_and_closes_scene(client, tmp_path):
         assert kinds.index("scene_closed") < kinds.index("guest_removed")
 
 
+# --- T72.2 first-meeting gate ----------------------------------------------
+
+
+def _seed_host_to_guest_edge(db: Path) -> None:
+    """Materialise a bot_a -> bot_b edge so the gate's check fires."""
+    from chat.eventlog.log import append_and_apply
+
+    with open_db(db) as conn:
+        append_and_apply(
+            conn,
+            kind="edge_update",
+            payload={
+                "source_id": "bot_a",
+                "target_id": "bot_b",
+                "chat_id": "chat_bot_a",
+                "affinity_delta": 0,
+                "knowledge_facts": ["already met before"],
+            },
+        )
+
+
+def test_add_guest_form_disables_prose_when_edge_exists(client, tmp_path):
+    """When host->candidate edge already exists, the GET partial renders
+    the textarea disabled and surfaces the "already know each other"
+    message so the user knows submitting will skip the seed.
+    """
+    _seed_chat(tmp_path / "test.db")
+    _seed_host_to_guest_edge(tmp_path / "test.db")
+
+    response = client.get("/chats/chat_bot_a/drawer")
+    assert response.status_code == 200
+    body = response.text
+    # Note + disabled state both present. The textarea sits next to the
+    # ``add-guest-prose`` class so we can match it specifically.
+    assert "already know each other" in body
+    assert 'class="add-guest-prose"' in body
+    # The textarea for the first (auto-selected) candidate should be
+    # disabled in the initial markup since an edge exists.
+    assert "disabled" in body.split('class="add-guest-prose"', 1)[1].split(">", 1)[0]
+    # And the option carries the ``data-existing-edge="true"`` attribute
+    # the inline JS uses to flip state on subsequent select changes.
+    assert 'data-existing-edge="true"' in body
+
+
+def test_add_guest_with_existing_edge_skips_seed_call(client, tmp_path):
+    """Submitting the Add-guest form WITHOUT toggling re-seed must skip
+    ``seed_inter_bot_edges`` entirely. We assert this via an empty mock
+    queue: if the seed function had been called it would have consumed
+    a canned response (or raised because none was available).
+    """
+    _seed_chat(tmp_path / "test.db")
+    _seed_host_to_guest_edge(tmp_path / "test.db")
+
+    # Empty queue: any classifier call would raise inside MockLLMClient.
+    canned_queue: list[str] = []
+    _override_llm(canned_queue)
+    try:
+        response = client.post(
+            "/chats/chat_bot_a/drawer/guest/add",
+            data={
+                "guest_bot_id": "bot_b",
+                "relationship_prose": "ignored prose",
+                # NO reseed flag — gate should suppress the seed call.
+            },
+        )
+        assert response.status_code == 200
+    finally:
+        app.dependency_overrides.clear()
+
+    with open_db(tmp_path / "test.db") as conn:
+        from chat.state.edges import get_edge
+        from chat.state.world import get_chat
+
+        chat = get_chat(conn, "chat_bot_a")
+        assert chat["guest_bot_id"] == "bot_b"
+
+        # The pre-seeded knowledge fact survives — proof the seed didn't run
+        # and overwrite the existing edge.
+        edge = get_edge(conn, "bot_a", "bot_b")
+        assert "already met before" in edge["knowledge"]
+
+        # Exactly one guest_added; no new edge_update events between
+        # bot_a and bot_b (the pre-seed edge_update from the test setup
+        # is the only edge_update on this pair).
+        added = conn.execute(
+            "SELECT COUNT(*) FROM event_log WHERE kind = 'guest_added'"
+        ).fetchone()[0]
+        assert added == 1
+
+        edge_updates = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'edge_update'"
+        ).fetchall()
+        # Only the pre-seed edge_update from _seed_host_to_guest_edge.
+        ab_updates = [
+            json.loads(p[0])
+            for p in edge_updates
+            if {
+                json.loads(p[0]).get("source_id"),
+                json.loads(p[0]).get("target_id"),
+            }
+            == {"bot_a", "bot_b"}
+        ]
+        assert len(ab_updates) == 1
+        assert ab_updates[0]["knowledge_facts"] == ["already met before"]
+
+
+def test_add_guest_with_existing_edge_and_reseed_runs_seed(client, tmp_path):
+    """Toggling ``re-seed anyway`` flips the gate off — the existing
+    flow runs (seed produces deltas, two ``edge_update`` events fire).
+    """
+    _seed_chat(tmp_path / "test.db")
+    _seed_host_to_guest_edge(tmp_path / "test.db")
+
+    canned = json.dumps(
+        {
+            "a_to_b_summary": "reconnected",
+            "a_to_b_knowledge_facts": ["new fact"],
+            "a_to_b_affinity_delta": 2,
+            "a_to_b_trust_delta": 1,
+            "b_to_a_summary": "reconnected",
+            "b_to_a_knowledge_facts": [],
+            "b_to_a_affinity_delta": 1,
+            "b_to_a_trust_delta": 0,
+        }
+    )
+    _override_llm([canned])
+    try:
+        response = client.post(
+            "/chats/chat_bot_a/drawer/guest/add",
+            data={
+                "guest_bot_id": "bot_b",
+                "relationship_prose": "fresh prose",
+                "reseed": "1",
+            },
+        )
+        assert response.status_code == 200
+    finally:
+        app.dependency_overrides.clear()
+
+    with open_db(tmp_path / "test.db") as conn:
+        edge_updates = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'edge_update'"
+        ).fetchall()
+        # Pre-seed (1) + two from the re-seed = 3 edge_updates total.
+        ab_updates = [
+            json.loads(p[0])
+            for p in edge_updates
+            if {
+                json.loads(p[0]).get("source_id"),
+                json.loads(p[0]).get("target_id"),
+            }
+            == {"bot_a", "bot_b"}
+        ]
+        assert len(ab_updates) == 3
+
+
 def test_drawer_with_guest_renders_guest_and_group_sections(client, tmp_path):
     _seed_chat(tmp_path / "test.db")
     from chat.eventlog.log import append_and_apply