diff --git a/chat/app.py b/chat/app.py
index 1d47509..0acbf69 100644
--- a/chat/app.py
+++ b/chat/app.py
@@ -12,6 +12,7 @@ from chat.services.background import BackgroundWorker
 # Trigger handler registration:
 import chat.state.entities  # noqa: F401
 import chat.state.edges  # noqa: F401
+import chat.state.manual_edit  # noqa: F401
 import chat.state.memory  # noqa: F401
 import chat.state.world  # noqa: F401
 
diff --git a/chat/state/manual_edit.py b/chat/state/manual_edit.py
new file mode 100644
index 0000000..ff6b247
--- /dev/null
+++ b/chat/state/manual_edit.py
@@ -0,0 +1,73 @@
+"""Handler for ``manual_edit`` events (T25, §6.4 final paragraph).
+
+A ``manual_edit`` event captures a user override of a projected field — its
+payload snapshots both the prior value and the new value so any edit can
+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 three 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.
+- ``memory_pov_summary`` — textarea edit (string).
+
+Other §6.4 editable fields (activity verb / attention / posture, edge
+summary, knowledge_facts list manipulation) are deferred to Phase 1.5.
+
+Pin toggles intentionally use the existing ``memory_pin_changed`` event
+(registered in :mod:`chat.state.memory`) rather than ``manual_edit`` so
+the projection writes both ``pinned`` and ``auto_pinned`` atomically.
+"""
+
+from __future__ import annotations
+
+from sqlite3 import Connection
+
+from chat.eventlog.log import Event
+from chat.eventlog.projector import on
+
+
+def _clamp(value: int, lo: int, hi: int) -> int:
+    return max(lo, min(hi, value))
+
+
+@on("manual_edit")
+def _apply_manual_edit(conn: Connection, e: Event) -> None:
+    p = e.payload
+    kind = p["target_kind"]
+    target_id = p["target_id"]
+    new_value = p["new_value"]
+
+    if kind == "edge_affinity":
+        conn.execute(
+            "UPDATE edges SET affinity = ? "
+            "WHERE source_id = ? AND target_id = ?",
+            (
+                _clamp(int(new_value), 0, 100),
+                target_id["source_id"],
+                target_id["target_id"],
+            ),
+        )
+    elif kind == "edge_trust":
+        conn.execute(
+            "UPDATE edges SET trust = ? "
+            "WHERE source_id = ? AND target_id = ?",
+            (
+                _clamp(int(new_value), 0, 100),
+                target_id["source_id"],
+                target_id["target_id"],
+            ),
+        )
+    elif kind == "memory_significance":
+        conn.execute(
+            "UPDATE memories SET significance = ? WHERE id = ?",
+            (_clamp(int(new_value), 0, 3), int(target_id)),
+        )
+    elif kind == "memory_pov_summary":
+        conn.execute(
+            "UPDATE memories SET pov_summary = ? WHERE id = ?",
+            (str(new_value), int(target_id)),
+        )
+    # Unknown target_kind: silently no-op for v1. Future kinds (activity
+    # fields, edge summary, knowledge_facts) extend the dispatch above.
diff --git a/chat/templates/_drawer.html b/chat/templates/_drawer.html
index 637a8d3..3ed1940 100644
--- a/chat/templates/_drawer.html
+++ b/chat/templates/_drawer.html
@@ -40,6 +40,18 @@
       <div class="edge-row">
         <strong>{{ host_bot.name }} &rarr; you</strong>
         <p>Affinity: {{ edge_b2y.affinity }}/100 &middot; Trust: {{ edge_b2y.trust }}/100</p>
+        <form class="inline-edit"
+              hx-post="/chats/{{ chat.id }}/drawer/edge/{{ host_bot.id }}/you/affinity"
+              hx-target="#drawer" hx-swap="innerHTML">
+          <label>
+            Affinity:
+            <input type="range" name="affinity" min="0" max="100"
+                   value="{{ edge_b2y.affinity }}"
+                   oninput="this.nextElementSibling.value = this.value">
+            <output>{{ edge_b2y.affinity }}</output>
+          </label>
+          <button type="submit">Save</button>
+        </form>
         {% if edge_b2y.summary %}<p class="muted">{{ edge_b2y.summary }}</p>{% endif %}
         {% if edge_b2y.knowledge %}
           <details><summary>Knowledge ({{ edge_b2y.knowledge|length }})</summary>
@@ -68,6 +80,12 @@
           <li>
             <span class="sig sig-{{ m.significance }}">{{ ['·','•','★','★★'][m.significance|default(0)] }}</span>
             {{ m.pov_summary }}
+            <form class="inline-edit"
+                  hx-post="/chats/{{ chat.id }}/drawer/memory/{{ m.id }}/pin"
+                  hx-target="#drawer" hx-swap="innerHTML">
+              <input type="hidden" name="pinned" value="0">
+              <button type="submit">Unpin</button>
+            </form>
           </li>
         {% endfor %}
       </ul>
@@ -84,6 +102,24 @@
           <li>
             <span class="sig sig-{{ m.significance }}">{{ ['·','•','★','★★'][m.significance|default(0)] }}</span>
             {{ m.pov_summary[:200] }}{% if m.pov_summary|length > 200 %}…{% endif %}
+            <form class="inline-edit"
+                  hx-post="/chats/{{ chat.id }}/drawer/memory/{{ m.id }}/significance"
+                  hx-target="#drawer" hx-swap="innerHTML">
+              <select name="significance">
+                {% for s in [0, 1, 2, 3] %}
+                  <option value="{{ s }}" {% if m.significance == s %}selected{% endif %}>
+                    {{ ['·','•','★','★★'][s] }} ({{ s }})
+                  </option>
+                {% endfor %}
+              </select>
+              <button type="submit">Set</button>
+            </form>
+            <form class="inline-edit"
+                  hx-post="/chats/{{ chat.id }}/drawer/memory/{{ m.id }}/pin"
+                  hx-target="#drawer" hx-swap="innerHTML">
+              <input type="hidden" name="pinned" value="{{ 0 if m.pinned else 1 }}">
+              <button type="submit">{{ 'Unpin' if m.pinned else 'Pin' }}</button>
+            </form>
           </li>
         {% endfor %}
       </ul>
diff --git a/chat/web/drawer.py b/chat/web/drawer.py
index 6c5a1e9..580c956 100644
--- a/chat/web/drawer.py
+++ b/chat/web/drawer.py
@@ -1,21 +1,37 @@
-"""Read-only chat drawer (T24).
+"""Chat drawer — read view (T24) and inline edits (T25).
 
-Returns an HTML partial rendered into the chat shell's `<aside id="drawer">`
-on first reveal. Shows the current scene + container, per-entity activity,
-host <-> you edges, pinned memories with an `n / cap` counter, and recent
-witnessed memories from the host's POV with significance markers.
+The GET endpoint renders an HTML partial showing the current scene +
+container, per-entity activity, host <-> you edges, pinned memories with
+an ``n / cap`` counter, and recent witnessed memories from the host's
+POV with significance markers.
 
-Edit affordances are added in T25; this endpoint is intentionally read-only.
+T25 adds three POST endpoints for the most useful inline edits, each
+returning the refreshed drawer partial so HTMX can swap it in:
+
+* affinity slider on an edge (emits ``manual_edit``);
+* significance dropdown on a memory (emits ``manual_edit``);
+* pin toggle on a memory (emits ``memory_pin_changed`` with
+  ``auto_pinned=0`` so a manual pin is not subject to auto-eviction).
+
+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
 
 from pathlib import Path
 
-from fastapi import APIRouter, Depends, HTTPException, Request
+from fastapi import APIRouter, Depends, Form, HTTPException, Request
 from fastapi.responses import HTMLResponse
 from fastapi.templating import Jinja2Templates
 
+from chat.eventlog.log import append_and_apply
 from chat.state.edges import get_edge
 from chat.state.entities import get_bot, get_you
 from chat.state.memory import get_pinned
@@ -104,3 +120,130 @@ async def drawer(chat_id: str, request: Request, conn=Depends(get_conn)):
             "pin_cap": PIN_CAP,
         },
     )
+
+
+# --- T25 edit endpoints ---------------------------------------------------
+#
+# Each endpoint:
+#   1. Loads the chat (404 if missing) and the target row (404 if missing).
+#   2. Reads the prior value before mutating, so the event payload carries
+#      it for §6.4 reversibility.
+#   3. Calls ``append_and_apply`` so the projected table updates atomically
+#      with the event log append; full reprojection would re-add deltas
+#      from earlier ``edge_update`` events.
+#   4. Returns the refreshed drawer partial via ``await drawer(...)``, which
+#      HTMX swaps into ``#drawer``.
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/edge/{source_id}/{target_id}/affinity",
+    response_class=HTMLResponse,
+)
+async def edit_edge_affinity(
+    chat_id: str,
+    source_id: str,
+    target_id: str,
+    request: Request,
+    affinity: 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}")
+
+    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["affinity"])
+    new_value = max(0, min(100, int(affinity)))
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "edge_affinity",
+            "target_id": {"source_id": source_id, "target_id": target_id},
+            "prior_value": prior,
+            "new_value": new_value,
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/memory/{memory_id}/significance",
+    response_class=HTMLResponse,
+)
+async def edit_memory_significance(
+    chat_id: str,
+    memory_id: int,
+    request: Request,
+    significance: 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}")
+
+    row = conn.execute(
+        "SELECT significance FROM memories WHERE id = ?", (memory_id,)
+    ).fetchone()
+    if row is None:
+        raise HTTPException(
+            status_code=404, detail=f"memory not found: {memory_id}"
+        )
+
+    prior = int(row[0])
+    new_value = max(0, min(3, int(significance)))
+    append_and_apply(
+        conn,
+        kind="manual_edit",
+        payload={
+            "target_kind": "memory_significance",
+            "target_id": int(memory_id),
+            "prior_value": prior,
+            "new_value": new_value,
+        },
+    )
+    return await drawer(chat_id, request, conn)
+
+
+@router.post(
+    "/chats/{chat_id}/drawer/memory/{memory_id}/pin",
+    response_class=HTMLResponse,
+)
+async def toggle_memory_pin(
+    chat_id: str,
+    memory_id: int,
+    request: Request,
+    pinned: 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}")
+
+    row = conn.execute(
+        "SELECT pinned FROM memories WHERE id = ?", (memory_id,)
+    ).fetchone()
+    if row is None:
+        raise HTTPException(
+            status_code=404, detail=f"memory not found: {memory_id}"
+        )
+
+    new_pinned = 1 if int(pinned) else 0
+    # Manual pin: ``auto_pinned=0`` so the §8.5 eviction query (which only
+    # touches auto-pinned rows) leaves this alone.
+    append_and_apply(
+        conn,
+        kind="memory_pin_changed",
+        payload={
+            "memory_id": int(memory_id),
+            "pinned": new_pinned,
+            "auto_pinned": 0,
+        },
+    )
+    return await drawer(chat_id, request, conn)
diff --git a/tests/test_drawer_edits.py b/tests/test_drawer_edits.py
new file mode 100644
index 0000000..86fd9c4
--- /dev/null
+++ b/tests/test_drawer_edits.py
@@ -0,0 +1,190 @@
+"""T25: drawer edits with manual_edit event capture.
+
+Each editable field on the drawer is exposed as a small POST endpoint.
+Edits emit either a ``manual_edit`` event (snapshotting the prior value
+for §6.4 reversibility) or, for pin toggles, a ``memory_pin_changed``
+event with ``auto_pinned=0`` so manual pins survive auto-eviction.
+
+Phase 1 narrowed scope: affinity slider, significance dropdown, pin
+toggle. Other §6.4 fields (activity, edge_summary, edge_trust, pov_summary,
+knowledge_facts list) are deferred to a Phase 1.5 follow-up.
+"""
+
+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:
+    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": "",
+            },
+        )
+        # Edge bot_a -> you with affinity_delta=0 to materialise the row at
+        # default 50/50.
+        append_event(
+            conn,
+            kind="edge_update",
+            payload={
+                "source_id": "bot_a",
+                "target_id": "you",
+                "chat_id": "chat_bot_a",
+                "affinity_delta": 0,
+            },
+        )
+        append_event(
+            conn,
+            kind="memory_written",
+            payload={
+                "owner_id": "bot_a",
+                "chat_id": "chat_bot_a",
+                "pov_summary": "A memory",
+                "witness_you": 1,
+                "witness_host": 1,
+                "witness_guest": 0,
+                "significance": 1,
+            },
+        )
+        project(conn)
+
+
+def test_edit_edge_affinity_emits_manual_edit_and_updates(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/edge/bot_a/you/affinity",
+        data={"affinity": "75"},
+    )
+    assert response.status_code == 200  # returns refreshed drawer partial
+    # Refresh shows the new affinity value.
+    assert "75" in response.text
+
+    with open_db(tmp_path / "test.db") as conn:
+        cur = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(cur) == 1
+        payload = json.loads(cur[0][0])
+        assert payload["target_kind"] == "edge_affinity"
+        assert payload["prior_value"] == 50
+        assert payload["new_value"] == 75
+        assert payload["target_id"]["source_id"] == "bot_a"
+        assert payload["target_id"]["target_id"] == "you"
+
+        from chat.state.edges import get_edge
+
+        edge = get_edge(conn, "bot_a", "you")
+        assert edge["affinity"] == 75
+
+
+def test_edit_memory_significance_emits_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(
+        f"/chats/chat_bot_a/drawer/memory/{memory_id}/significance",
+        data={"significance": "3"},
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        sig = conn.execute(
+            "SELECT significance FROM memories WHERE id = ?", (memory_id,)
+        ).fetchone()[0]
+        assert sig == 3
+        cur = conn.execute(
+            "SELECT payload_json FROM event_log WHERE kind = 'manual_edit'"
+        ).fetchall()
+        assert len(cur) == 1
+        payload = json.loads(cur[0][0])
+        assert payload["target_kind"] == "memory_significance"
+        assert payload["prior_value"] == 1
+        assert payload["new_value"] == 3
+        assert payload["target_id"] == memory_id
+
+
+def test_toggle_memory_pin_manual_emits_event_with_auto_pinned_0(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(
+        f"/chats/chat_bot_a/drawer/memory/{memory_id}/pin",
+        data={"pinned": "1"},
+    )
+    assert response.status_code == 200
+
+    with open_db(tmp_path / "test.db") as conn:
+        row = conn.execute(
+            "SELECT pinned, auto_pinned FROM memories WHERE id = ?", (memory_id,)
+        ).fetchone()
+        assert row[0] == 1
+        assert row[1] == 0  # NOT auto-pinned (manual pin survives auto-eviction)
+        # The pin toggle uses memory_pin_changed (not manual_edit).
+        cur = conn.execute(
+            "SELECT payload_json FROM event_log "
+            "WHERE kind = 'memory_pin_changed' ORDER BY id DESC LIMIT 1"
+        ).fetchone()
+        payload = json.loads(cur[0])
+        assert payload["pinned"] == 1
+        assert payload["auto_pinned"] == 0
+        assert payload["memory_id"] == memory_id
+
+
+def test_edit_404_when_chat_missing(client):
+    response = client.post(
+        "/chats/no_such/drawer/edge/bot_a/you/affinity",
+        data={"affinity": "75"},
+    )
+    assert response.status_code == 404
+
+
+def test_edit_404_when_target_missing(client, tmp_path):
+    _seed(tmp_path / "test.db")
+    response = client.post(
+        "/chats/chat_bot_a/drawer/memory/99999/significance",
+        data={"significance": "2"},
+    )
+    assert response.status_code == 404