diff --git a/decnet/web/db/models/__init__.py b/decnet/web/db/models/__init__.py
index cda33950..ea32a0fc 100644
--- a/decnet/web/db/models/__init__.py
+++ b/decnet/web/db/models/__init__.py
@@ -48,7 +48,6 @@ from .attackers import (
     AttackerFingerprintState,
     AttackerIdentity,
     AttackersResponse,
-    SessionProfile,
     SmtpTarget,
 )
 from .attacker_intel import (
@@ -255,7 +254,6 @@ __all__ = [
     "AttackersResponse",
     "ObservationRow",
     "ObservedAttachment",
-    "SessionProfile",
     "SmtpTarget",
     # campaigns
     "Campaign",
diff --git a/decnet/web/db/models/attacker_intel.py b/decnet/web/db/models/attacker_intel.py
index 99be69df..97f580ee 100644
--- a/decnet/web/db/models/attacker_intel.py
+++ b/decnet/web/db/models/attacker_intel.py
@@ -24,7 +24,7 @@ class AttackerIntel(SQLModel, table=True):
     ``schema_version`` is committed to storage from day one — federation
     gossip in v2/v3 requires cross-operator compatibility, and
     retrofitting a version column after rows exist is painful. Mirrors
-    the rationale on :class:`SessionProfile`.
+    the rationale on :class:`AttackerIdentity`'s ``schema_version``.
     """
 
     __tablename__ = "attacker_intel"
diff --git a/decnet/web/db/models/attackers.py b/decnet/web/db/models/attackers.py
index 061e5be5..bf5dfbe7 100644
--- a/decnet/web/db/models/attackers.py
+++ b/decnet/web/db/models/attackers.py
@@ -1,4 +1,13 @@
-"""Attacker core + per-attacker behavioral and per-session profile rows."""
+"""Attacker core + per-attacker behavioral rows.
+
+Per-session keystroke-dynamics fingerprints have moved out of this
+module: the column-zoo ``SessionProfile`` shipped here pre-v0 was
+superseded by the BEHAVE-SHELL ``observations`` table
+(``decnet/web/db/models/observations.py``), which mirrors the BEHAVE
+``Observation`` envelope and accepts every primitive the extractor
+emits. See ``development/BEHAVE-INTEGRATION.md`` for the design and
+``DEBT-036`` (stale) → ``DEBT-050`` for the paydown trail.
+"""
 from datetime import datetime, timezone
 from typing import Any, List, Optional
 
@@ -9,26 +18,6 @@ from sqlmodel import Field, SQLModel
 from ._base import _BIG_TEXT
 
 
-# ─── Keystroke-dynamics tuning constants ──────────────────────────────────────
-#
-# These are the semantic thresholds the session-profile ingester (DEBT-036)
-# uses to bucket IATs and decide what "started a new action" means. Keeping
-# them here (not inline in the ingester) so that:
-#   * the schema docstrings below can reference exact boundaries instead of
-#     copy-pasted magic numbers, and
-#   * a future calibration pass against real honeypot session data only has
-#     to touch one place.
-# All values in seconds.
-
-KD_PAUSE_BURST_MAX_S: float = 0.2   # IAT < this = muscle-memory digraph
-KD_PAUSE_THINK_MAX_S: float = 1.5   # IAT < this = semantic / context-switch pause
-                                    # everything ≥ this lands in the distracted bucket
-KD_START_OF_ACTION_IDLE_S: float = 2.0  # idle gap that counts as "new action"
-                                        # raised from 1s — 1s still catches a lot of
-                                        # mid-command hesitation, 2s is closer to
-                                        # empirical "meaningfully new action"
-
-
 class Attacker(SQLModel, table=True):
     """
     Per-IP **observation** row. Every distinct source IP we observe gets
@@ -208,10 +197,15 @@ class AttackerIdentity(SQLModel, table=True):
     c2_endpoints: Optional[str] = Field(
         default=None, sa_column=Column("c2_endpoints", Text, nullable=True)
     )
-    # V2 keystroke-dynamics hook. Same shape as
-    # SessionProfile.kd_digraph_simhash; this is the centroid (or
-    # majority vote) across the identity's sessions. BINARY(8) so
-    # MySQL can index without a prefix length, same as session_profile.
+    # V2 keystroke-dynamics hook. Per-identity centroid (or majority
+    # vote) across the identity's session-level digraph SimHashes.
+    # The per-session SimHashes themselves now ride as BEHAVE
+    # observations (``cognitive.*`` digraph primitive — see
+    # ``development/BEHAVE-INTEGRATION.md`` and the BEHAVE-SHELL
+    # registry); this column is the rollup the (future) attribution
+    # engine will write into so the federation gossip layer
+    # has one identity-level fingerprint to compare across operators.
+    # BINARY(8) so MySQL can index without a prefix length.
     kd_digraph_simhash: Optional[bytes] = Field(
         default=None,
         sa_column=Column("kd_digraph_simhash", BINARY(8), nullable=True, index=True),
@@ -281,139 +275,6 @@ class AttackerBehavior(SQLModel, table=True):
     )
 
 
-class SessionProfile(SQLModel, table=True):
-    """
-    Per-session keystroke-dynamics fingerprint.
-
-    One row per recorded interactive session. Pre-v1 the ingestion job
-    that populates these columns is not yet built (tracked as gap #2 in
-    SIGNAL_CAPTURE_AUDIT.md); the table ships empty so that:
-      * downstream correlation/federation work can target a stable schema, and
-      * `schema_version` is committed to storage from day one — federation
-        gossip in v2 requires cross-operator compatibility, and retrofitting
-        a version column after rows exist is painful.
-
-    All feature columns are nullable so the empty write path (one row per
-    closed session) is valid without the behavioral analyzer online yet.
-    """
-    __tablename__ = "session_profile"
-    sid: str = Field(primary_key=True)                  # session UUID
-    log_id: Optional[int] = Field(
-        default=None, foreign_key="logs.id", index=True
-    )
-    schema_version: int = Field(default=1)
-    # ──────────────────────────────────────────────────────────────────────
-    # Keystroke-dynamics feature columns (kd_*).
-    #
-    # Intended use:   session clustering and tooling attribution
-    #                 ("is this the same typist?" / "is this a known C2
-    #                 framework's paste cadence?").
-    # Explicitly NOT for: attribution to named individuals, access or
-    #                 admission decisions, any ML-driven identity lookup,
-    #                 or biometric-login-style user identification. Those
-    #                 framings push into legal/ethics territory we don't
-    #                 want this project walking into by accident.
-    # PII discipline: every kd_* column aggregates CHARACTERS and TIMING
-    #                 only — never raw input-stream content. Attacker
-    #                 passwords typed over SSH must not land here.
-    # Nulls semantic: a null means "ingester hasn't run on this session
-    #                 yet", not "zero events". Consumers should treat
-    #                 null as absent, not as a computed zero.
-    # ──────────────────────────────────────────────────────────────────────
-    # Inter-key interval timing moments (seconds).
-    kd_iki_mean: Optional[float] = None
-    kd_iki_stdev: Optional[float] = None
-    kd_iki_p50: Optional[float] = None
-    kd_iki_p95: Optional[float] = None
-    kd_enter_latency_p50: Optional[float] = None
-    kd_enter_latency_p95: Optional[float] = None
-    # Cadence ratios.
-    kd_burst_ratio: Optional[float] = None
-    kd_think_ratio: Optional[float] = None
-    # Control-character rates (events per keystroke).
-    kd_ctrl_backspace: Optional[float] = None
-    kd_ctrl_wkill: Optional[float] = None
-    kd_ctrl_ukill: Optional[float] = None
-    kd_ctrl_abort: Optional[float] = None
-    kd_ctrl_eof: Optional[float] = None
-    kd_arrow_rate: Optional[float] = None
-    kd_tab_rate: Optional[float] = None
-    # 8-byte SimHash over keystroke digraphs — Hamming-comparable across sessions.
-    # Fixed-width BINARY(8) rather than BLOB: MySQL can't index BLOB/TEXT
-    # columns without a prefix length, and SimHashes are always exactly 8
-    # bytes so a variable-length type gains nothing here.
-    #
-    # PII discipline: the simhash is computed over keystroke CHARACTERS
-    # (digraph bigrams), never over the raw content of the input stream —
-    # attacker passwords typed over SSH must never land in this column.
-    kd_digraph_simhash: Optional[bytes] = Field(
-        default=None,
-        sa_column=Column("kd_digraph_simhash", BINARY(8), nullable=True, index=True),
-    )
-    # Top-N most-common digraphs with their mean IAT, as JSON.
-    # Complements kd_digraph_simhash: the simhash answers "same typist?",
-    # this answers "same typist IN THE SAME MENTAL STATE?" (tired vs rested
-    # vs distracted shifts bigram-specific IATs measurably). Shape:
-    #   [["th", 47, 0.082], ["in", 31, 0.091], ...]  (bigram, count, mean_iat_s)
-    # Bounded by the ingester to N≤32 to cap row width.
-    #
-    # TODO(DEBT-036 upgrade path): JSON-in-TEXT is fine for v1's
-    # "surface the typist's top digraphs on the attacker page" use
-    # case, but every similarity query (e.g. "find sessions where the
-    # 'th' digraph mean IAT is within 20 ms of this one") has to pull
-    # the string, parse JSON, compare — O(sessions) with a constant
-    # overhead per row. If that query shape becomes hot, promote to a
-    # dedicated `session_bigram_stats(sid, bigram, count, mean_iat_s)`
-    # table with a (bigram, mean_iat_s) index, or a JSONB column on
-    # Postgres with a GIN index. Either is straightforward, neither
-    # changes the write-side ingester materially.
-    kd_top_bigrams: Optional[str] = Field(
-        default=None, sa_column=Column("kd_top_bigrams", Text, nullable=True),
-    )
-    # IAT of the first keystroke following an idle gap >
-    # KD_START_OF_ACTION_IDLE_S (or the session-start gap before the
-    # very first keystroke). Separates "initiating a command" from
-    # "executing a remembered one" — real humans have measurable
-    # start-of-action latency, bots don't. Median across all such
-    # initiations in the session, seconds.
-    #
-    # Prompt-agnostic on purpose: PS1 / multi-line prompts / sudo
-    # password prompts make prompt-anchored detection fragile. The
-    # idle-gap approach conflates post-prompt action-start with
-    # mid-session think-and-resume — acceptable for a single median
-    # field; if we later want to split them, feed the concurrent
-    # output-stream prompt-pattern into the ingester and fall back to
-    # time-only detection when it misses.
-    kd_start_of_action_latency: Optional[float] = None
-    # Three-bucket pause-length histogram, counts (not ratios — raw
-    # counts preserve the total-keystrokes denominator in the column
-    # itself). Bucket edges are the KD_PAUSE_* module constants:
-    #   burst     : IAT < KD_PAUSE_BURST_MAX_S  (muscle-memory digraphs)
-    #   think     : KD_PAUSE_BURST_MAX_S ≤ IAT < KD_PAUSE_THINK_MAX_S
-    #               (semantic boundary, context switch)
-    #   distracted: IAT ≥ KD_PAUSE_THINK_MAX_S  (went to look something
-    #               up, got paged, reading another window)
-    # More discriminating than the flat burst_ratio / think_ratio pair:
-    # C2 operators concentrate in the burst bucket with a thin tail;
-    # opportunistic humans have a fat think bucket and a long
-    # distracted tail.
-    kd_pause_hist_burst: Optional[int] = None
-    kd_pause_hist_think: Optional[int] = None
-    kd_pause_hist_distracted: Optional[int] = None
-    # Longest IAT in the session, seconds. The distracted-bucket count
-    # alone can't tell "one 3-second pause" from "three 60-second
-    # pauses" — both contribute 1-3 to the distracted bucket but
-    # represent different behaviours (brief think vs actual
-    # disengagement). max_pause_gap carries that signal in one scalar.
-    kd_max_pause_gap: Optional[float] = None
-    # Derived totals.
-    total_keystrokes: Optional[int] = None
-    session_duration_s: Optional[float] = None
-    created_at: datetime = Field(
-        default_factory=lambda: datetime.now(timezone.utc)
-    )
-
-
 class SmtpTarget(SQLModel, table=True):
     """
     Per-attacker list of victim domains observed via the SMTP honeypots.
diff --git a/decnet/web/db/mysql/repository.py b/decnet/web/db/mysql/repository.py
index 2e5accaa..6b39bfc6 100644
--- a/decnet/web/db/mysql/repository.py
+++ b/decnet/web/db/mysql/repository.py
@@ -97,35 +97,6 @@ class MySQLRepository(SQLModelRepository):
                         f"ALTER TABLE `{table_name}` MODIFY COLUMN `{col_name}` {spec}"
                     ))
 
-    async def _migrate_session_profile_table(self) -> None:
-        """Add DEBT-036 keystroke-dynamics columns (start-of-action latency,
-        three-bucket pause histogram, top-bigrams JSON) to existing tables.
-
-        MySQL's ``ALTER TABLE ADD COLUMN`` fails if the column already
-        exists, so gate on ``information_schema.COLUMNS`` to stay
-        idempotent.
-        """
-        async with self.engine.begin() as conn:
-            rows = (await conn.execute(text(
-                "SELECT COLUMN_NAME FROM information_schema.COLUMNS "
-                "WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = 'session_profile'"
-            ))).fetchall()
-            if not rows:
-                return
-            existing_cols = {r[0] for r in rows}
-            additions = [
-                ("kd_top_bigrams", "TEXT NULL"),
-                ("kd_start_of_action_latency", "DOUBLE NULL"),
-                ("kd_pause_hist_burst", "INT NULL"),
-                ("kd_pause_hist_think", "INT NULL"),
-                ("kd_pause_hist_distracted", "INT NULL"),
-            ]
-            for col_name, col_spec in additions:
-                if col_name not in existing_cols:
-                    await conn.execute(text(
-                        f"ALTER TABLE session_profile ADD COLUMN {col_name} {col_spec}"
-                    ))
-
     async def initialize(self) -> None:
         """Create tables and run all MySQL-specific migrations.
 
@@ -138,7 +109,6 @@ class MySQLRepository(SQLModelRepository):
             await lock_conn.execute(text("SELECT GET_LOCK('decnet_schema_init', 30)"))
             try:
                 await self._migrate_attackers_table()
-                await self._migrate_session_profile_table()
                 await self._migrate_column_types()
                 async with self.engine.begin() as conn:
                     await conn.run_sync(SQLModel.metadata.create_all)
diff --git a/decnet/web/db/repository.py b/decnet/web/db/repository.py
index 79ed017d..399c8105 100644
--- a/decnet/web/db/repository.py
+++ b/decnet/web/db/repository.py
@@ -303,16 +303,6 @@ class BaseRepository(ABC):
         """Bulk-fetch behavior rows keyed by attacker IP (JOIN to attackers)."""
         pass
 
-    @abstractmethod
-    async def upsert_session_profile(self, sid: str, data: dict[str, Any]) -> None:
-        """Insert or update the keystroke-dynamics profile row for a session."""
-        pass
-
-    @abstractmethod
-    async def get_session_profile(self, sid: str) -> Optional[dict[str, Any]]:
-        """Retrieve the keystroke-dynamics profile row for a session."""
-        pass
-
     # ─── BEHAVE-SHELL observations ─────────────────────────────────────
     # See development/BEHAVE-INTEGRATION.md §"Storage" for the full
     # schema rationale. Every observation envelope emitted by the
diff --git a/decnet/web/db/sqlite/repository.py b/decnet/web/db/sqlite/repository.py
index 247345e1..37d048e4 100644
--- a/decnet/web/db/sqlite/repository.py
+++ b/decnet/web/db/sqlite/repository.py
@@ -55,31 +55,6 @@ class SQLiteRepository(SQLModelRepository):
                     "ALTER TABLE attackers ADD COLUMN country_source VARCHAR(16)"
                 ))
 
-    async def _migrate_session_profile_table(self) -> None:
-        """Add DEBT-036 keystroke-dynamics columns (start-of-action latency,
-        three-bucket pause histogram, top-bigrams JSON) to existing tables.
-
-        SQLite's ``ALTER TABLE ADD COLUMN`` fails if the column already
-        exists, so gate on ``PRAGMA table_info`` to stay idempotent.
-        """
-        async with self.engine.begin() as conn:
-            rows = (await conn.execute(text("PRAGMA table_info(session_profile)"))).fetchall()
-            if not rows:
-                return  # table absent; create_all() handles it.
-            existing_cols = {r[1] for r in rows}
-            additions = [
-                ("kd_top_bigrams", "TEXT"),
-                ("kd_start_of_action_latency", "REAL"),
-                ("kd_pause_hist_burst", "INTEGER"),
-                ("kd_pause_hist_think", "INTEGER"),
-                ("kd_pause_hist_distracted", "INTEGER"),
-            ]
-            for col_name, col_type in additions:
-                if col_name not in existing_cols:
-                    await conn.execute(text(
-                        f"ALTER TABLE session_profile ADD COLUMN {col_name} {col_type}"
-                    ))
-
     def _json_field_equals(self, key: str):
         # SQLite stores JSON as text; json_extract is the canonical accessor.
         return text(f"json_extract(fields, '$.{key}') = :val")
diff --git a/decnet/web/db/sqlmodel_repo/__init__.py b/decnet/web/db/sqlmodel_repo/__init__.py
index cceda4c0..6944cd86 100644
--- a/decnet/web/db/sqlmodel_repo/__init__.py
+++ b/decnet/web/db/sqlmodel_repo/__init__.py
@@ -97,7 +97,6 @@ class SQLModelRepository(
         """Create tables if absent and seed the admin user."""
         from sqlmodel import SQLModel
         await self._migrate_attackers_table()
-        await self._migrate_session_profile_table()
         async with self.engine.begin() as conn:
             await conn.run_sync(SQLModel.metadata.create_all)
         await self._ensure_admin_user()
@@ -137,11 +136,6 @@ class SQLModelRepository(
         """Legacy-schema cleanup. Override per dialect (DDL introspection is non-portable)."""
         return None
 
-    async def _migrate_session_profile_table(self) -> None:
-        """Add DEBT-036 keystroke-dynamics columns to existing session_profile
-        rows. Override per dialect — DDL introspection is non-portable."""
-        return None
-
     async def get_deckies(self) -> List[dict]:
         _state = await asyncio.to_thread(load_state)
         return [_d.model_dump() for _d in _state[0].deckies] if _state else []
diff --git a/decnet/web/db/sqlmodel_repo/attackers/__init__.py b/decnet/web/db/sqlmodel_repo/attackers/__init__.py
index cb0b5b08..92383afd 100644
--- a/decnet/web/db/sqlmodel_repo/attackers/__init__.py
+++ b/decnet/web/db/sqlmodel_repo/attackers/__init__.py
@@ -1,9 +1,9 @@
 """Attacker repository methods.
 
-The full domain spans ~500 lines of methods across attacker rows,
-behavior signals, session profiles, SMTP victim tracking, and
-log-derived activity views.  Each concern lives in its own submixin;
-``AttackersMixin`` composes them.
+Per-concern submixins composed onto ``AttackersMixin``. The legacy
+``SessionProfilesMixin`` was dropped when the BEHAVE-SHELL
+``observations`` table replaced the ``session_profile`` column-zoo
+(see DEBT-050 → ``decnet/web/db/sqlmodel_repo/observations.py``).
 
 ``_deserialize_attacker`` lives on ``AttackersCoreMixin`` and is reached
 from ``IdentitiesMixin.list_observations_for_identity`` via ``self.`` —
@@ -15,14 +15,12 @@ from __future__ import annotations
 from decnet.web.db.sqlmodel_repo.attackers._core import AttackersCoreMixin
 from decnet.web.db.sqlmodel_repo.attackers.activity import AttackerActivityMixin
 from decnet.web.db.sqlmodel_repo.attackers.behavior import AttackerBehaviorMixin
-from decnet.web.db.sqlmodel_repo.attackers.sessions import SessionProfilesMixin
 from decnet.web.db.sqlmodel_repo.attackers.smtp import SmtpTargetsMixin
 
 
 class AttackersMixin(
     AttackerActivityMixin,
     AttackerBehaviorMixin,
-    SessionProfilesMixin,
     SmtpTargetsMixin,
     AttackersCoreMixin,
 ):
diff --git a/decnet/web/db/sqlmodel_repo/attackers/sessions.py b/decnet/web/db/sqlmodel_repo/attackers/sessions.py
deleted file mode 100644
index 07787ce6..00000000
--- a/decnet/web/db/sqlmodel_repo/attackers/sessions.py
+++ /dev/null
@@ -1,51 +0,0 @@
-"""Per-session profile rows (keystroke-dynamics features land here at
-ingestion-time post-V2)."""
-from __future__ import annotations
-
-from typing import Any, Optional
-
-from sqlalchemy import select
-
-from decnet.web.db.models import SessionProfile
-
-
-from decnet.web.db.sqlmodel_repo._helpers import _MixinBase
-
-class SessionProfilesMixin(_MixinBase):
-    async def upsert_session_profile(
-        self,
-        sid: str,
-        data: dict[str, Any],
-    ) -> None:
-        """
-        Write (or update) the session_profile row for *sid*.
-
-        Pre-v1, the typical call is the empty-write path at session close:
-        `upsert_session_profile(sid, {"log_id": <id>})` — all keystroke
-        feature columns stay NULL until the V2 ingestion job populates them.
-        """
-        async with self._session() as session:
-            result = await session.execute(
-                select(SessionProfile).where(SessionProfile.sid == sid)
-            )
-            existing = result.scalar_one_or_none()
-            if existing:
-                for k, v in data.items():
-                    setattr(existing, k, v)
-                session.add(existing)
-            else:
-                session.add(SessionProfile(sid=sid, **data))
-            await session.commit()
-
-    async def get_session_profile(
-        self,
-        sid: str,
-    ) -> Optional[dict[str, Any]]:
-        async with self._session() as session:
-            result = await session.execute(
-                select(SessionProfile).where(SessionProfile.sid == sid)
-            )
-            row = result.scalar_one_or_none()
-            if not row:
-                return None
-            return row.model_dump(mode="json")
diff --git a/decnet/web/router/attackers/api_get_attacker_detail.py b/decnet/web/router/attackers/api_get_attacker_detail.py
index f7263142..04670207 100644
--- a/decnet/web/router/attackers/api_get_attacker_detail.py
+++ b/decnet/web/router/attackers/api_get_attacker_detail.py
@@ -41,4 +41,13 @@ async def get_attacker_detail(
     # a ROTATION DETECTED badge when the count crosses a threshold.
     attacker["ip_leaks"] = await repo.get_attacker_ip_leaks(uuid, limit=10)
     attacker["ip_leaks_total"] = await repo.count_attacker_ip_leaks(uuid)
+    # BEHAVE-SHELL observations — latest value per primitive for this
+    # attacker. Empty dict (rendered as empty list) until the
+    # extractor (DEBT-050) lands and starts writing rows. The frontend
+    # panel that consumes this ships in BEHAVE-INTEGRATION.md Phase 5.
+    latest_per_primitive = await repo.latest_observation_per_primitive(uuid)
+    attacker["observations"] = [
+        {"primitive": primitive, **payload}
+        for primitive, payload in sorted(latest_per_primitive.items())
+    ]
     return attacker
diff --git a/tests/db/mysql/test_mysql_migration.py b/tests/db/mysql/test_mysql_migration.py
index febe9cab..5d50e506 100644
--- a/tests/db/mysql/test_mysql_migration.py
+++ b/tests/db/mysql/test_mysql_migration.py
@@ -191,9 +191,13 @@ async def test_migrate_column_types_default_clause_per_column():
 
 @pytest.mark.asyncio
 async def test_mysql_initialize_calls_migrate_column_types():
-    """MySQLRepository.initialize() must invoke every migration helper in
-    the right order: attackers first, then session_profile (DEBT-036),
-    then column types, then seed the admin user."""
+    """MySQLRepository.initialize() must invoke every migration helper
+    in the right order: attackers first, then column types, then seed
+    the admin user.
+
+    The legacy ``_migrate_session_profile_table`` step (DEBT-036) was
+    dropped when SessionProfile was deleted in favour of the
+    ``observations`` table — see DEBT-050 / BEHAVE-INTEGRATION.md."""
     repo = _make_repo()
 
     call_order: list[str] = []
@@ -201,9 +205,6 @@ async def test_mysql_initialize_calls_migrate_column_types():
     async def fake_migrate_attackers():
         call_order.append("migrate_attackers")
 
-    async def fake_migrate_session_profile():
-        call_order.append("migrate_session_profile")
-
     async def fake_migrate_column_types():
         call_order.append("migrate_column_types")
 
@@ -211,7 +212,6 @@ async def test_mysql_initialize_calls_migrate_column_types():
         call_order.append("ensure_admin")
 
     repo._migrate_attackers_table       = fake_migrate_attackers
-    repo._migrate_session_profile_table = fake_migrate_session_profile
     repo._migrate_column_types          = fake_migrate_column_types
     repo._ensure_admin_user             = fake_ensure_admin
 
@@ -228,7 +228,6 @@ async def test_mysql_initialize_calls_migrate_column_types():
 
     assert call_order == [
         "migrate_attackers",
-        "migrate_session_profile",
         "migrate_column_types",
         "ensure_admin",
     ], f"Unexpected call order: {call_order}"
diff --git a/tests/db/test_base_repo.py b/tests/db/test_base_repo.py
index e9c0f83b..1a0245ca 100644
--- a/tests/db/test_base_repo.py
+++ b/tests/db/test_base_repo.py
@@ -38,8 +38,6 @@ class DummyRepo(BaseRepository):
     async def upsert_attacker_behavior(self, u, d): await super().upsert_attacker_behavior(u, d)
     async def get_attacker_behavior(self, u): await super().get_attacker_behavior(u)
     async def get_behaviors_for_ips(self, ips): await super().get_behaviors_for_ips(ips)
-    async def upsert_session_profile(self, sid, data): await super().upsert_session_profile(sid, data)
-    async def get_session_profile(self, sid): await super().get_session_profile(sid)
     # BEHAVE-SHELL observations (DEBT-050 / BEHAVE-INTEGRATION.md Phase 1)
     async def upsert_observation(self, data): await super().upsert_observation(data); return ""
     async def latest_observation_per_primitive(self, attacker_uuid): await super().latest_observation_per_primitive(attacker_uuid); return {}
@@ -129,8 +127,6 @@ async def test_base_repo_coverage():
     await dr.upsert_attacker_behavior("a", {})
     await dr.get_attacker_behavior("a")
     await dr.get_behaviors_for_ips({"1.1.1.1"})
-    await dr.upsert_session_profile("sid", {})
-    await dr.get_session_profile("sid")
     await dr.upsert_observation({})
     await dr.latest_observation_per_primitive("a")
     await dr.observations_time_series("a", "motor.input_modality")
diff --git a/tests/profiler/test_session_profile.py b/tests/profiler/test_session_profile.py
deleted file mode 100644
index c7022aa4..00000000
--- a/tests/profiler/test_session_profile.py
+++ /dev/null
@@ -1,55 +0,0 @@
-"""
-Tests for the session_profile table + repo helpers (SIGNAL_CAPTURE_AUDIT gap #2).
-
-Pre-v1 the ingestion job that populates keystroke-dynamics features is
-deferred; this suite exercises the empty-write path (one row per session,
-all feature columns NULL) and round-trips a filled row so future work can
-land without re-discovering the schema.
-"""
-import pytest
-from decnet.web.db.factory import get_repository
-
-
-@pytest.fixture
-async def repo(tmp_path):
-    r = get_repository(db_path=str(tmp_path / "session_profile.db"))
-    await r.initialize()
-    return r
-
-
-@pytest.mark.anyio
-async def test_empty_write_path_ships_null_features(repo):
-    # Session close writes `{}` — schema_version defaults to 1, all feature
-    # columns stay NULL.
-    await repo.upsert_session_profile("sid-1", {})
-    row = await repo.get_session_profile("sid-1")
-    assert row is not None
-    assert row["sid"] == "sid-1"
-    assert row["schema_version"] == 1
-    assert row["kd_iki_mean"] is None
-    assert row["kd_digraph_simhash"] is None
-    assert row["total_keystrokes"] is None
-
-
-@pytest.mark.anyio
-async def test_upsert_replaces_existing(repo):
-    await repo.upsert_session_profile("sid-2", {})
-    await repo.upsert_session_profile(
-        "sid-2",
-        {
-            "kd_iki_mean": 0.120,
-            "kd_iki_p95": 0.450,
-            "total_keystrokes": 512,
-            "session_duration_s": 61.3,
-        },
-    )
-    row = await repo.get_session_profile("sid-2")
-    assert row["kd_iki_mean"] == pytest.approx(0.120)
-    assert row["kd_iki_p95"] == pytest.approx(0.450)
-    assert row["total_keystrokes"] == 512
-    assert row["session_duration_s"] == pytest.approx(61.3)
-
-
-@pytest.mark.anyio
-async def test_get_missing_returns_none(repo):
-    assert await repo.get_session_profile("does-not-exist") is None
diff --git a/tests/ttp/test_lifter_absence.py b/tests/ttp/test_lifter_absence.py
index dc2d7bc7..2216bb88 100644
--- a/tests/ttp/test_lifter_absence.py
+++ b/tests/ttp/test_lifter_absence.py
@@ -2,7 +2,7 @@
 
 Every per-source lifter is allowed (and expected) to encounter
 events whose required join is missing — no ``AttackerIntel`` row,
-no ``SessionProfile``, no ``AttackerBehavior``, no canary record,
+no ``ObservationRow``, no ``AttackerBehavior``, no canary record,
 no identity row, no ``CredentialReuse`` entry. Absence is the
 steady state, not the exception. The contract pinned here: