Revert "feat: add encode_delta_with_session for stacked delta+dedup"

This reverts commit 9387b70.

Author: blackwell-systems

src/gcf/__init__.py

@@ -36,7 +36,7 @@
 
 from .constants import KIND_ABBREV, KIND_EXPAND
 from .decode import DecodeError, decode
-from .delta import encode_delta, encode_delta_with_session
+from .delta import encode_delta
 from .encode import encode
 from .generic import encode_generic, GenericOptions
 from .session import Session, encode_with_session
@@ -61,7 +61,6 @@
     "decode_generic",
     "encode",
     "encode_delta",
-    "encode_delta_with_session",
     "encode_generic",
     "GenericOptions",
     "encode_with_session",

src/gcf/delta.py

@@ -1,7 +1,5 @@
 """GCF delta encoding: only added/removed symbols for incremental delivery."""
 
-from __future__ import annotations
-
 from .constants import KIND_ABBREV
 from .types import DeltaPayload
 
@@ -54,83 +52,3 @@ def encode_delta(d: DeltaPayload) -> str:
             parts.append(f"{e.source} -> {e.target} {e.edge_type}")
 
     return "\n".join(parts) + "\n"
-
-
-def encode_delta_with_session(
-    d: DeltaPayload,
-    sess: "Session | None" = None,
-) -> str:
-    """Encode a DeltaPayload with session dedup for added symbols.
-
-    Stacks delta and session dedup: symbols that are "added" relative to the
-    previous payload but were transmitted in an earlier call become bare
-    references instead of full declarations. After encoding, new symbols
-    are recorded in the session.
-
-    Args:
-        d: The delta payload to encode.
-        sess: Optional session tracker. If None, falls back to encode_delta.
-
-    Returns:
-        GCF delta-formatted text string.
-    """
-    if sess is None:
-        return encode_delta(d)
-
-    from .session import Session
-
-    parts: list[str] = []
-
-    savings = 0.0
-    if d.full_tokens > 0:
-        savings = 100.0 * (1.0 - d.delta_tokens / d.full_tokens)
-
-    parts.append(
-        f"GCF profile=graph tool={d.tool} delta=true base_root={d.base_root} "
-        f"new_root={d.new_root} tokens={d.delta_tokens} savings={savings:.0f}% session=true"
-    )
-
-    # Removed symbols.
-    if d.removed:
-        parts.append("## removed")
-        for s in d.removed:
-            kind = KIND_ABBREV.get(s.kind, s.kind)
-            parts.append(f"{kind} {s.qualified_name}")
-
-    # Added symbols: session-aware. Previously transmitted become bare refs.
-    new_symbols = []
-    bare_refs = []
-    for s in d.added:
-        if sess.transmitted(s.qualified_name):
-            bare_refs.append(s)
-        else:
-            new_symbols.append(s)
-
-    if bare_refs:
-        parts.append(f"## ref [{len(bare_refs)}]")
-        for s in bare_refs:
-            sid = sess.get_id(s.qualified_name)
-            parts.append(f"@{sid}  # previously transmitted")
-
-    if new_symbols:
-        parts.append("## added")
-        for i, s in enumerate(new_symbols):
-            kind = KIND_ABBREV.get(s.kind, s.kind)
-            parts.append(f"@{i} {kind} {s.qualified_name} {s.score:.2f} {s.provenance}")
-
-    # Removed edges.
-    if d.removed_edges:
-        parts.append("## edges_removed")
-        for e in d.removed_edges:
-            parts.append(f"{e.source} -> {e.target} {e.edge_type}")
-
-    # Added edges.
-    if d.added_edges:
-        parts.append("## edges_added")
-        for e in d.added_edges:
-            parts.append(f"{e.source} -> {e.target} {e.edge_type}")
-
-    # Record new symbols in session.
-    sess.record(new_symbols)
-
-    return "\n".join(parts) + "\n"