refactor(supervise): hash the proposed file inside Proposal.new; sha256_hex → root util

Move sha256_hex out of orchestrator/supervisor/util.py to the root
bot_bottle.util (it's a generic string hash, not supervise-specific), and have
Proposal.new take the proposed file contents and compute current_file_hash
itself instead of every caller passing sha256_hex(proposed_file).

Every call site set current_file_hash to the hash of the proposed file, and
nothing reads the field except the DB round-trip (schema + _row_to_proposal +
from_dict, all untouched), so folding the hash into the factory is
behavior-preserving and removes the boilerplate. Callers now pass just the
file; the orchestrator no longer imports sha256_hex at all.

Full unit suite green (2243).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

bot_bottle/orchestrator/service.py

@@ -41,7 +41,6 @@ from .supervisor import (
     TOOL_EGRESS_BLOCK,
     Supervisor,
     render_diff,
-    sha256_hex,
 )
 
 
@@ -216,7 +215,6 @@ class Orchestrator:
             tool=tool,
             proposed_file=proposed_file,
             justification=justification,
-            current_file_hash=sha256_hex(proposed_file),
         )
         self._supervisor.write_proposal(proposal)
         return proposal.id

bot_bottle/orchestrator/supervisor/__init__.py

@@ -8,8 +8,8 @@ dependency explicit and injectable in tests.
 
 For convenience this package also re-exports the neutral vocabulary
 (`bot_bottle.supervisor`'s types + `SupervisePlan`) and the pure `render_diff`
-/ `sha256_hex` helpers (`util`), so orchestrator-side callers import from one
-place. The data plane must NOT import this package — it imports
+helper (`util`), so orchestrator-side callers import from one place. The data
+plane must NOT import this package — it imports
 `bot_bottle.supervisor` (neutral) directly and reaches the queue over the
 control-plane RPC.
 """
@@ -24,7 +24,7 @@ from ..store.store_manager import StoreManager
 from ..store.queue_store import QueueStore
 from ...store.audit_store import AuditStore
 from ...supervisor.types import AuditEntry, Proposal, Response
-from .util import render_diff, sha256_hex  # noqa: F401 — re-exported for callers
+from .util import render_diff  # noqa: F401 — re-exported for callers
 
 
 class Supervisor:

bot_bottle/orchestrator/supervisor/util.py

@@ -1,14 +1,13 @@
-"""Pure supervise helpers — diff rendering and content hashing.
+"""Pure supervise helpers — diff rendering.
 
-Stateless utilities used alongside the `Supervisor` service. Kept as plain
-functions (not methods) because they carry no state and are also handy to
-callers that only need to hash or diff.
+Stateless utility used alongside the `Supervisor` service. Kept as a plain
+function (not a method) because it carries no state. (Content hashing is a
+generic helper — `bot_bottle.util.sha256_hex`.)
 """
 
 from __future__ import annotations
 
 import difflib
-import hashlib
 
 
 def render_diff(before: str, after: str, *, label: str = "config") -> str:
@@ -25,7 +24,3 @@ def render_diff(before: str, after: str, *, label: str = "config") -> str:
     if not parts:
         return ""
     return "".join(p if p.endswith("\n") else p + "\n" for p in parts).rstrip("\n")
-
-
-def sha256_hex(content: str) -> str:
-    return hashlib.sha256(content.encode("utf-8")).hexdigest()

bot_bottle/supervisor/types.py

@@ -15,6 +15,8 @@ import uuid
 from dataclasses import dataclass
 from datetime import datetime, timezone
 
+from ..util import sha256_hex
+
 TOOL_EGRESS_BLOCK = "egress-block"
 TOOL_EGRESS_ALLOW = "egress-allow"
 TOOL_GITLEAKS_ALLOW = "gitleaks-allow"
@@ -94,7 +96,6 @@ class Proposal:
         tool: str,
         proposed_file: str,
         justification: str,
-        current_file_hash: str,
         now: datetime | None = None,
     ) -> "Proposal":
         ts = (now or datetime.now(timezone.utc)).isoformat()
@@ -105,7 +106,7 @@ class Proposal:
             proposed_file=proposed_file,
             justification=justification,
             arrival_timestamp=ts,
-            current_file_hash=current_file_hash,
+            current_file_hash=sha256_hex(proposed_file),
         )
 
     def to_dict(self) -> dict[str, object]:

bot_bottle/util.py

@@ -5,11 +5,17 @@ level deeper, under their backend package."""
 
 from __future__ import annotations
 
+import hashlib
 import ipaddress
 import os
 import sys
 
 
+def sha256_hex(content: str) -> str:
+    """Hex SHA-256 of a UTF-8 string."""
+    return hashlib.sha256(content.encode("utf-8")).hexdigest()
+
+
 def is_ip_literal(value: str) -> bool:
     try:
         ipaddress.ip_address(value)

tests/unit/test_orchestrator_control_plane.py

@@ -28,7 +28,6 @@ from bot_bottle.orchestrator.store.store_manager import StoreManager
 from bot_bottle.orchestrator.supervisor import (
     Proposal,
     TOOL_EGRESS_ALLOW,
-    sha256_hex,
     Supervisor,
 )
 
@@ -420,7 +419,7 @@ class TestDispatchSupervise(unittest.TestCase):
             "10.243.0.1", metadata=json.dumps({"slug": slug}), policy="routes: []\n")
         p = Proposal.new(
             bottle_slug=slug, tool=TOOL_EGRESS_ALLOW, proposed_file=proposed,
-            justification="need it", current_file_hash=sha256_hex(proposed))
+            justification="need it")
         Supervisor().write_proposal(p)
         return p.id
 

tests/unit/test_orchestrator_service.py

@@ -20,7 +20,6 @@ from bot_bottle.orchestrator.supervisor import (
     Proposal,
     STATUS_APPROVED,
     TOOL_EGRESS_ALLOW,
-    sha256_hex,
     Supervisor,
 )
 
@@ -183,7 +182,7 @@ class TestOrchestratorSupervise(unittest.TestCase):
     def _queue(self, slug: str, proposed: str) -> str:
         p = Proposal.new(
             bottle_slug=slug, tool=TOOL_EGRESS_ALLOW, proposed_file=proposed,
-            justification="need it", current_file_hash=sha256_hex(proposed))
+            justification="need it")
         Supervisor().write_proposal(p)
         return p.id
 

tests/unit/test_supervise.py

@@ -7,6 +7,7 @@ from pathlib import Path
 
 from bot_bottle.orchestrator import supervisor as supervise
 from bot_bottle.paths import host_db_path
+from bot_bottle.util import sha256_hex
 from tests.unit import use_bottle_root
 from bot_bottle.store.audit_store import AuditStore
 from bot_bottle.orchestrator.store.queue_store import QueueStore
@@ -21,7 +22,6 @@ from bot_bottle.orchestrator.supervisor import (
     TOOL_EGRESS_ALLOW,
     TOOL_GITLEAKS_ALLOW,
     render_diff,
-    sha256_hex,
 )
 
 _SV = Supervisor()
@@ -40,7 +40,6 @@ def _proposal(
         tool=tool,
         proposed_file=proposed,
         justification=justification,
-        current_file_hash=sha256_hex(proposed),
         now=FIXED_TS,
     )
 
@@ -145,13 +144,11 @@ class TestQueueIO(unittest.TestCase):
         a = Proposal.new(
             bottle_slug="dev", tool=TOOL_EGRESS_ALLOW,
             proposed_file="routes:\n  - host: early.example.com\n", justification="early",
-            current_file_hash="x",
             now=datetime(2026, 5, 25, 10, 0, 0, tzinfo=timezone.utc),
         )
         b = Proposal.new(
             bottle_slug="dev", tool=TOOL_EGRESS_ALLOW,
             proposed_file="routes:\n  - host: late.example.com\n", justification="late",
-            current_file_hash="x",
             now=datetime(2026, 5, 25, 14, 0, 0, tzinfo=timezone.utc),
         )
         # Write in reverse order.
@@ -288,7 +285,6 @@ class TestToolConstants(unittest.TestCase):
             tool=supervise.TOOL_EGRESS_TOKEN_ALLOW,
             proposed_file="host: api.example.com\n",
             justification="false positive",
-            current_file_hash="h",
         )
         self.assertEqual(p, Proposal.from_dict(p.to_dict()))
 

tests/unit/test_supervise_cli.py

@@ -19,7 +19,6 @@ from bot_bottle.orchestrator.supervisor import (
     TOOL_EGRESS_BLOCK,
     TOOL_GITLEAKS_ALLOW,
     TOOL_EGRESS_TOKEN_ALLOW,
-    sha256_hex,
 )
 
 
@@ -37,7 +36,7 @@ def _proposal(slug: str = "dev", tool: str = TOOL_EGRESS_ALLOW,
     payload = payloads.get(tool, "")
     return Proposal.new(
         bottle_slug=slug, tool=tool, proposed_file=payload,
-        justification=f"needed for {slug}", current_file_hash=sha256_hex(payload),
+        justification=f"needed for {slug}",
         now=now,
     )
 

tests/unit/test_supervise_edge.py

@@ -30,7 +30,6 @@ def _proposal() -> Proposal:
         tool=TOOL_EGRESS_ALLOW,
         proposed_file="x",
         justification="j",
-        current_file_hash="h",
     )
 
 

tests/unit/test_supervise_server.py

@@ -92,7 +92,7 @@ class _FakeSuperviseResolver:
             return None
         proposal = _sv.Proposal.new(
             bottle_slug=self.bottle_id, tool=tool, proposed_file=proposed_file,
-            justification=justification, current_file_hash=_sv.sha256_hex(proposed_file),
+            justification=justification,
         )
         _SV.write_proposal(proposal)
         return proposal.id
@@ -750,7 +750,6 @@ class TestNonBlockingSupervise(unittest.TestCase):
             tool=_sv.TOOL_EGRESS_ALLOW,
             proposed_file=self._ROUTES,
             justification="need example.com",
-            current_file_hash=_sv.sha256_hex(self._ROUTES),
         )
         _SV.write_proposal(p)
         return p